git.iko.soy/reflex
on develop help sign in
swap
90891e1227 ahead, 0 behind
53 files changed+1523−1787
since splitsnapshots
unifiedsplit
.github/workflows/haskell.yml+41 .travis.yml−173 ChangeLog.md+71−2 Quickref.md+1 README.md+15−17 cabal.haskell-ci+6 cabal.project.freeze−1 dep/reflex-platform/github.json+3−3 reflex.cabal+134−33 release.nix+2−2 src/Data/AppendMap.hs+1−1 src/Data/FastMutableIntMap.hs+7−3 src/Data/Functor/Misc.hs−235 src/Data/Map/Misc.hs+1−1 src/Reflex/Adjustable/Class.hs+3−2 src/Reflex/BehaviorWriter/Base.hs+16−7 src/Reflex/BehaviorWriter/Class.hs+11−5 src/Reflex/Class.hs+26−6 src/Reflex/Dynamic.hs+15−1 src/Reflex/DynamicWriter/Base.hs+14−5 src/Reflex/EventWriter/Base.hs+16−5 src/Reflex/FastWeak.hs+10 src/Reflex/Host/Headless.hs+128 src/Reflex/Patch.hs−99 src/Reflex/Patch/Class.hs−34 src/Reflex/Patch/DMap.hs−82 src/Reflex/Patch/DMapWithMove.hs−363 src/Reflex/Patch/IntMap.hs−59 src/Reflex/Patch/Map.hs−55 src/Reflex/Patch/MapWithMove.hs−270 src/Reflex/PerformEvent/Base.hs+2 src/Reflex/PerformEvent/Class.hs+6−1 src/Reflex/PostBuild/Base.hs+2−1 src/Reflex/PostBuild/Class.hs−1 src/Reflex/Profiled.hs+59−5 src/Reflex/Pure.hs+6−1 src/Reflex/Query/Base.hs+15−4 src/Reflex/Query/Class.hs+15−7 src/Reflex/Requester/Base.hs+97−27 src/Reflex/Spider/Internal.hs+458−259 src/Reflex/TriggerEvent/Base.hs+2 src/Reflex/TriggerEvent/Class.hs+6 src/Reflex/Widget/Basic.hs+1−1 test/Adjustable.hs+62 test/DebugCycles.hs+171 test/GC.hs+2−2 test/Headless.hs+10 test/QueryT.hs+1−1 test/Reflex/Plan/Pure.hs+1 test/Reflex/Test/CrossImpl.hs+13−8 test/Reflex/Test/Micro.hs+8−2 test/RequesterT.hs+63−2 test/hlint.hs+2−1
.github/workflows/haskell.ymlnew file+41
@@ -0,0 +1,41 @@
1+name: github-action
2+
3+on: [push, pull_request]
4+
5+jobs:
6+ build:
7+ strategy:
8+ matrix:
9+ ghc: ['8.4.4', '8.6.5', '8.8.4', '8.10.2']
10+ os: ['ubuntu-latest', 'macos-latest']
11+ runs-on: ${{ matrix.os }}
12+
13+ name: GHC ${{ matrix.ghc }} on ${{ matrix.os }}
14+ steps:
15+ - uses: actions/checkout@v2
16+ - uses: actions/setup-haskell@v1
17+ with:
18+ ghc-version: ${{ matrix.ghc }}
19+ - name: Cache
20+ uses: actions/cache@v1
21+ env:
22+ cache-name: cache-cabal
23+ with:
24+ path: ~/.cabal
25+ key: ${{ runner.os }}-${{ matrix.ghc }}-build-${{ env.cache-name }}-${{ hashFiles('**/*.cabal') }}-${{ hashFiles('**/cabal.project') }}
26+ restore-keys: |
27+ ${{ runner.os }}-${{ matrix.ghc }}-build-${{ env.cache-name }}-
28+ ${{ runner.os }}-${{ matrix.ghc }}-build-
29+ ${{ runner.os }}-${{ matrix.ghc }}-
30+ ${{ runner.os }}
31+
32+ - name: Install dependencies
33+ run: |
34+ cabal update
35+ cabal build --only-dependencies --enable-tests --enable-benchmarks
36+ - name: Build
37+ run: cabal build --enable-tests --enable-benchmarks all
38+ - name: Run tests
39+ run: cabal test all
40+ - name: Build Docs
41+ run: cabal haddock
.travis.ymldeleted−173
@@ -1,173 +0,0 @@
1−# This Travis job script has been generated by a script via
2−#
3−# haskell-ci '--config=cabal.haskell-ci' 'cabal.project'
4−#
5−# For more information, see https://github.com/haskell-CI/haskell-ci
6−#
7−# version: 0.3.20190814
8−#
9−language: c
10−dist: xenial
11−sudo: required
12−git:
13− # whether to recursively clone submodules
14− submodules: false
15−cache:
16− directories:
17− - $HOME/.cabal/packages
18− - $HOME/.cabal/store
19−before_cache:
20− - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log
21− # remove files that are regenerated by 'cabal update'
22− - rm -fv $CABALHOME/packages/hackage.haskell.org/00-index.*
23− - rm -fv $CABALHOME/packages/hackage.haskell.org/*.json
24− - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.cache
25− - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar
26− - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx
27− - rm -rfv $CABALHOME/packages/head.hackage
28−matrix:
29− include:
30− - compiler: ghcjs-8.4
31− addons: {"apt":{"sources":["hvr-ghc"],"packages":["cabal-install-3.0"]}}
32− - compiler: ghc-8.8.1
33− addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.8.1","cabal-install-3.0"]}}
34− - compiler: ghc-8.6.5
35− addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.6.5","cabal-install-2.4"]}}
36− - compiler: ghc-8.4.4
37− addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.4.4","cabal-install-2.4"]}}
38− - compiler: ghc-8.2.2
39− addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.2.2","cabal-install-2.4"]}}
40− - compiler: ghc-8.0.2
41− addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.0.2","cabal-install-2.4"]}}
42−before_install:
43− - |
44− if [ "$TRAVIS_OS_NAME" = "linux" ]; then
45− sudo add-apt-repository -y ppa:hvr/ghcjs;
46− curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | sudo apt-key add -
47− sudo apt-add-repository 'https://deb.nodesource.com/node_8.x xenial main'
48− sudo apt-get update;
49− sudo apt-get install $CC cabal-install-3.0 nodejs;
50− fi
51− - HC=$(echo "/opt/$CC/bin/ghc" | sed 's/-/\//')
52− - WITHCOMPILER="-w $HC"
53− - |
54− if echo $CC | grep -q ghcjs; then
55− GHCJS=true
56− HC=${HC}js
57− WITHCOMPILER="--ghcjs ${WITHCOMPILER}js"
58− else
59− GHCJS=false;
60− fi
61− - if $GHCJS ; then sudo apt-get install -y ghc-8.4.4 ; fi
62− - if $GHCJS ; then PATH="/opt/ghc/8.4.4/bin:$PATH" ; fi
63− - HCPKG="$HC-pkg"
64− - unset CC
65− - CABAL=/opt/ghc/bin/cabal
66− - CABALHOME=$HOME/.cabal
67− - export PATH="$CABALHOME/bin:$PATH"
68− - TOP=$(pwd)
69− - "HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\\d+)\\.(\\d+)\\.(\\d+)(\\.(\\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')"
70− - echo $HCNUMVER
71− - CABAL="$CABAL -vnormal+nowrap+markoutput"
72− - set -o pipefail
73− - |
74− echo 'function blue(s) { printf "\033[0;34m" s "\033[0m " }' >> .colorful.awk
75− echo 'BEGIN { state = "output"; }' >> .colorful.awk
76− echo '/^-----BEGIN CABAL OUTPUT-----$/ { state = "cabal" }' >> .colorful.awk
77− echo '/^-----END CABAL OUTPUT-----$/ { state = "output" }' >> .colorful.awk
78− echo '!/^(-----BEGIN CABAL OUTPUT-----|-----END CABAL OUTPUT-----)/ {' >> .colorful.awk
79− echo ' if (state == "cabal") {' >> .colorful.awk
80− echo ' print blue($0)' >> .colorful.awk
81− echo ' } else {' >> .colorful.awk
82− echo ' print $0' >> .colorful.awk
83− echo ' }' >> .colorful.awk
84− echo '}' >> .colorful.awk
85− - cat .colorful.awk
86− - |
87− color_cabal_output () {
88− awk -f $TOP/.colorful.awk
89− }
90− - echo text | color_cabal_output
91−install:
92− - ${CABAL} --version
93− - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
94− - node --version
95− - echo $GHCJS
96− - TEST=--enable-tests
97− - BENCH=--enable-benchmarks
98− - BENCH=--disable-benchmarks
99− - HEADHACKAGE=false
100− - rm -f $CABALHOME/config
101− - |
102− echo "verbose: normal +nowrap +markoutput" >> $CABALHOME/config
103− echo "remote-build-reporting: anonymous" >> $CABALHOME/config
104− echo "write-ghc-environment-files: always" >> $CABALHOME/config
105− echo "remote-repo-cache: $CABALHOME/packages" >> $CABALHOME/config
106− echo "logs-dir: $CABALHOME/logs" >> $CABALHOME/config
107− echo "world-file: $CABALHOME/world" >> $CABALHOME/config
108− echo "extra-prog-path: $CABALHOME/bin" >> $CABALHOME/config
109− echo "symlink-bindir: $CABALHOME/bin" >> $CABALHOME/config
110− echo "installdir: $CABALHOME/bin" >> $CABALHOME/config
111− echo "build-summary: $CABALHOME/logs/build.log" >> $CABALHOME/config
112− echo "store-dir: $CABALHOME/store" >> $CABALHOME/config
113− echo "install-dirs user" >> $CABALHOME/config
114− echo " prefix: $CABALHOME" >> $CABALHOME/config
115− echo "repository hackage.haskell.org" >> $CABALHOME/config
116− echo " url: http://hackage.haskell.org/" >> $CABALHOME/config
117− - cat $CABALHOME/config
118− - rm -fv cabal.project cabal.project.local cabal.project.freeze
119− - travis_retry ${CABAL} v2-update -v
120− - if $GHCJS ; then (cd /tmp && ${CABAL} v2-install -w ghc-8.4.4 happy) ; fi
121− # Generate cabal.project
122− - rm -rf cabal.project cabal.project.local cabal.project.freeze
123− - touch cabal.project
124− - |
125− echo "packages: ." >> cabal.project
126− - |
127− - cat cabal.project || true
128− - cat cabal.project.local || true
129− - if [ -f "./configure.ac" ]; then (cd "." && autoreconf -i); fi
130− - ${CABAL} v2-freeze $WITHCOMPILER ${TEST} ${BENCH} | color_cabal_output
131− - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
132− - rm cabal.project.freeze
133−script:
134− - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
135− # Packaging...
136− - ${CABAL} v2-sdist all | color_cabal_output
137− # Unpacking...
138− - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
139− - cd ${DISTDIR} || false
140− - find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar -xvf '{}' \;
141− - find . -maxdepth 1 -type f -name '*.tar.gz' -exec rm '{}' \;
142− - PKGDIR_reflex="$(find . -maxdepth 1 -type d -regex '.*/reflex-[0-9.]*')"
143− # Generate cabal.project
144− - rm -rf cabal.project cabal.project.local cabal.project.freeze
145− - touch cabal.project
146− - |
147− echo "packages: ${PKGDIR_reflex}" >> cabal.project
148− - |
149− - cat cabal.project || true
150− - cat cabal.project.local || true
151− # Building...
152− # this builds all libraries and executables (without tests/benchmarks)
153− - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all | color_cabal_output
154− # Building with tests and benchmarks...
155− # build & run tests, build benchmarks
156− - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} all | color_cabal_output
157− # Testing...
158− - if ! $GHCJS ; then ${CABAL} v2-test $WITHCOMPILER ${TEST} ${BENCH} all | color_cabal_output ; fi
159− # cabal check...
160− - (cd ${PKGDIR_reflex} && ${CABAL} -vnormal check)
161− # haddock...
162− - if ! $GHCJS ; then ${CABAL} v2-haddock $WITHCOMPILER ${TEST} ${BENCH} all | color_cabal_output ; fi
163− # Constraint sets
164− - rm -rf cabal.project.local
165− # Constraint set no-th
166− - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --constraint='reflex -use-template-haskell' all | color_cabal_output
167− # Constraint set old-these
168− - if $GHCJS || ! $GHCJS && [ $HCNUMVER -lt 80800 ] ; then ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --constraint='these <1' all | color_cabal_output ; fi
169− # Constraint set old-witherable
170− - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --constraint='witherable <0.3.2' all | color_cabal_output
171−
172−# REGENDATA ["--config=cabal.haskell-ci","cabal.project"]
173−# EOF
ChangeLog.md+71−2
@@ -1,5 +1,76 @@
11# Revision history for reflex
22
3+## 0.8.2.0
4+
5+* Add `matchResponseMapWithRequests`, which it similar to `matchResponsesWithRequests` but allows processing of multiple responses at once.
6+
7+## 0.8.1.1
8+
9+* Allow newer hlint for older GHCs, and add upper bound for newer GHCs
10+
11+## 0.8.1.0
12+
13+* Add support for GHC 8.10
14+* Drop support for GHC < 8.4
15+
16+## 0.8.0.0
17+
18+* Replace 0.7.2.0 with 0.8.0.0 to reflect the `MonadHold` interface change. Deprecates 0.7.2.0.
19+
20+## 0.7.2.0 -- *Deprecated*
21+
22+* ([#416](https://github.com/reflex-frp/reflex/pull/416)) Add `now :: m (Event t ())` to `MonadHold`.
23+* Extend some dependency version bounds
24+* Fix HLint 3 test
25+
26+## 0.7.1.1
27+
28+*Backport release*.
29+Changes do not carry forward to 0.7.2.0.
30+
31+* Add support for GHC 8.10
32+* Drop support for GHC < 8.4
33+* Extend some dependency version bounds
34+* Fix HLint 3 test
35+
36+## 0.7.1.0
37+
38+* ([#413](https://github.com/reflex-frp/reflex/pull/413), [#417](https://github.com/reflex-frp/reflex/pull/417)) Add `Reflex.Host.Headless` module which provides `runHeadlessApp` as an easy way to run a Reflex network in a "headless" environment.
39+* ([#420](https://github.com/reflex-frp/reflex/pull/420)) Add a [`Data.Zip.Unzip`](https://hackage.haskell.org/package/semialign-1.1/docs/Data-Zip.html#t:Unzip) instance for `Event`.
40+* ([#419](https://github.com/reflex-frp/reflex/pull/419)) Add `distributeIntMapOverDynPure` and `joinDynThroughIntMap` as convenience functions for working with `Dynamic` `IntMap`s.
41+
42+
43+## 0.7.0.0
44+
45+* Add lifting instances for most classes to `Reflex.Profiled.Profiled`. ([#398](https://github.com/reflex-frp/reflex/pull/398))
46+* Class `MonadQuery t q m` now has a `Monad m` superclass constraint. ([#400](https://github.com/reflex-frp/reflex/pull/400))
47+* **(Breaking change)** Rename class `MonadBehaviorWriter` -> `BehaviorWriter` for consistency with `EventWriter`/`DynamicWriter`. ([#401](https://github.com/reflex-frp/reflex/pull/401))
48+* Introduce deprecated alias `MonadBehaviorWriter = BehaviorWriter`. ([#401](https://github.com/reflex-frp/reflex/pull/401))
49+* Fix bug in spider where event subscriptions would be prematurely finalized due to over-aggressive inlining. ([#409](https://github.com/reflex-frp/reflex/pull/409))
50+* Add instances of `PerformEvent` and `TriggerEvent` for `MaybeT`. ([#395](https://github.com/reflex-frp/reflex/pull/395))
51+
52+## 0.6.4.1
53+
54+* Fix a bug in the Reflex Profiled transformer where
55+ `Reflex.Class.mergeIncrementalG` and
56+ `Reflex.Class.mergeIncrementalWithMoveG` implementations referenced
57+ itself instead of the inner transformed timeline, causing an
58+ infinite loop.
59+
60+## 0.6.4
61+
62+* Support GHC 8.8
63+
64+* Add `Reflex.Query.Base.mapQueryT`. See that module for documentation
65+
66+* The `Reflex.Patch.*` modules were moved to the `patch` library.
67+ They are `Data.Patch.*` there, but reexported under their old names for backwards compatability here.
68+
69+* Additional instances for `Query` classes for basic types.
70+
71+* Add cabal flags `debug-propagation` and `debug-event-cycles` to build in debugging
72+ code for performance and for cyclic dependencies between events
73+
374## 0.6.3
475
576* `Data.WeakBag.traverse` and `Data.FastWeakBag.traverse` have been deprecated.
@@ -11,8 +82,6 @@
1182 - `instance NotReady (SpiderTimeline x) (SpiderHost x)`
1283 - `instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x))`
1384
14−* Additional instances for `Group` and `Query` classes for basic types.
15−
1685## 0.6.2.4
1786
1887* Update to monoidal-containers 0.6
Quickref.md+1
@@ -54,6 +54,7 @@ Since MonadHold depends on MonadSample, any [S] function also runs in [H] contex
5454[ ] difference :: Event a -> Event b -> Event a
5555[ ] align :: Event a -> Event b -> Event (These a b)
5656[ ] alignWith :: (These a b -> c) -> Event a -> Event b -> Event c
57+ -- Note align functions from Data.Align in semialign package
5758[ ] mergeWith :: (a -> a -> a) -> [Event a] -> Event a
5859[ ] leftmost :: [Event a] -> Event a
5960[ ] mergeList :: [Event a] -> Event (NonEmpty a)
README.md+15−17
@@ -1,25 +1,23 @@
1−## [Reflex](https://reflex-frp.org/)
1+# [Reflex](https://reflex-frp.org/)
22
3−[![Hackage](https://img.shields.io/hackage/v/reflex.svg)](http://hackage.haskell.org/package/reflex)
3+[![Haskell](https://img.shields.io/badge/language-Haskell-orange.svg)](https://haskell.org) [![Hackage](https://img.shields.io/hackage/v/reflex.svg)](https://hackage.haskell.org/package/reflex) [![Hackage CI](https://matrix.hackage.haskell.org/api/v2/packages/reflex/badge)](https://matrix.hackage.haskell.org/#/package/reflex) [![BSD3 License](https://img.shields.io/badge/license-BSD3-blue.svg)](https://github.com/reflex-frp/reflex/blob/master/LICENSE)
44
5−### Practical Functional Reactive Programming
5+Interactive programs without callbacks or side-effects. Functional Reactive Programming (FRP) uses composable events and time-varying values to describe interactive systems as pure functions. Just like other pure functional code, functional reactive code is easier to get right on the first try, maintain, and reuse.
66
7−Reflex is a fully-deterministic, higher-order Functional Reactive Programming (FRP) interface and an engine that efficiently implements that interface.
7+Reflex is a fully-deterministic, higher-order Functional Reactive Programming interface and an engine that efficiently implements that interface.
88
9−[Reflex-DOM](https://github.com/reflex-frp/reflex-dom) is a framework built on Reflex that facilitates the development of web pages, including highly-interactive single-page apps.
9+**Visit https://reflex-frp.org for more information, tutorials, documentation and [examples](https://examples.reflex-frp.org/).**
1010
11−A summary of Reflex functions is available in the [quick reference](Quickref.md).
11+## Resources
1212
13−**Visit https://reflex-frp.org/ for more information, tutorials, documentation and [examples](https://examples.reflex-frp.org/).**
13+* [Official Website](https://reflex-frp.org)
14+* [Quick Reference](Quickref.md)
15+* [Reflex-DOM](https://github.com/reflex-frp/reflex-dom): A framework built on Reflex that facilitates the development of web pages, including highly-interactive single-page apps.
16+* [Obelisk](https://github.com/obsidiansystems/obelisk#obelisk): A framework built on Reflex and Reflex-DOM for functional reactive web and mobile applications, with batteries included.
17+* [Get started with Reflex](https://github.com/reflex-frp/reflex-platform)
18+* [/r/reflexfrp](https://www.reddit.com/r/reflexfrp)
19+* [irc.freenode.net #reflex-frp](http://webchat.freenode.net?channels=%23reflex-frp&uio=d4)
1420
15−### Resources
16−[Get started with Reflex](https://github.com/reflex-frp/reflex-platform)
21+## Hacking
1722
18−[/r/reflexfrp](https://www.reddit.com/r/reflexfrp)
19−
20−[irc.freenode.net #reflex-frp](http://webchat.freenode.net?channels=%23reflex-frp&uio=d4)
21−
22−### Hacking
23−
24−Use the `./scripts/hack-on reflex` script in [Reflex Platform](https://github.com/reflex-frp/reflex-platform) to checkout the source code of `reflex` locally in `reflex-platform/reflex` directory.
25−Then do modifications to the source in place, and use the `./try-reflex` or `./scripts/work-on` scripts to create the shell to test your changes.
23+From the root of a [Reflex Platform](https://github.com/reflex-frp/reflex-platform) checkout, run `./scripts/hack-on haskell-overlays/reflex-packages/dep/reflex`. This will check out the reflex source code into the `haskell-overlays/reflex-packages/dep/reflex` directory. You can then point that checkout at your fork, make changes, etc. Use the `./try-reflex` or `./scripts/work-on` scripts to start a shell in which you can test your changes.
cabal.haskell-ci+6
@@ -15,3 +15,9 @@ constraint-set old-these
1515
1616constraint-set old-witherable
1717 constraints: witherable <0.3.2
18+
19+constraint-set debug-propagation
20+ constraints: reflex +debug-propagation
21+
22+constraint-set debug-cycles
23+ constraints: reflex +debug-cycles
cabal.project.freezedeleted−1
@@ -1 +0,0 @@
1−constraints: any.text < 1.2.4.0
dep/reflex-platform/github.json+3−3
@@ -1,7 +1,7 @@
11{
22 "owner": "reflex-frp",
33 "repo": "reflex-platform",
4− "branch": "master",
5− "rev": "510b990d0b11f0626afbec5fe8575b5b2395391b",
6− "sha256": "09cmahsbxr0963wq171c7j139iyzz49hramr4v9nsf684wcwkngv"
4+ "branch": "develop",
5+ "rev": "f628398d076243a0851b27e625b37f65dff9b89b",
6+ "sha256": "0sl0hf1glgyb1vmf2mhw4r9ipmcqk1y19d3wsic7dix2jwywzrh9"
77}
reflex.cabal+134−33
@@ -1,7 +1,17 @@
11Name: reflex
2−Version: 0.6.3
2+Version: 0.8.2.0
33Synopsis: Higher-order Functional Reactive Programming
4−Description: Reflex is a high-performance, deterministic, higher-order Functional Reactive Programming system
4+Description:
5+ Interactive programs without callbacks or side-effects.
6+ Functional Reactive Programming (FRP) uses composable events and time-varying
7+ values to describe interactive systems as pure functions.
8+ Just like other pure functional code, functional reactive code is easier
9+ to get right on the first try, maintain, and reuse.
10+ .
11+ Reflex is a fully-deterministic, higher-order Functional Reactive Programming
12+ interface and an engine that efficiently implements that interface.
13+ .
14+ <https://reflex-frp.org>
515License: BSD3
616License-file: LICENSE
717Author: Ryan Trinkle
@@ -9,7 +19,7 @@ Maintainer: ryan.trinkle@gmail.com
919Stability: Experimental
1020Category: FRP
1121Build-type: Simple
12−Cabal-version: >=1.9.2
22+Cabal-version: 1.22
1323homepage: https://reflex-frp.org
1424bug-reports: https://github.com/reflex-frp/reflex/issues
1525extra-source-files:
@@ -18,8 +28,8 @@ extra-source-files:
1828 ChangeLog.md
1929
2030tested-with:
21− GHC ==8.0.2 || ==8.2.2 || ==8.4.4 || ==8.6.5 || ==8.8.1,
22− GHCJS ==8.4
31+ GHC ==8.4.4 || ==8.6.5 || ==8.8.1 || ==8.10.2,
32+ GHCJS ==8.6
2333
2434flag use-reflex-optimizer
2535 description: Use the GHC plugin Reflex.Optimizer on some of the modules in the package. This is still experimental.
@@ -41,29 +51,43 @@ flag fast-weak
4151 default: False
4252 manual: True
4353
54+flag debug-propagation
55+ description: Enable debugging of spider internals
56+ default: False
57+ manual: True
58+
59+flag debug-cycles
60+ description: Enable debugging of event cycles
61+ default: False
62+ manual: True
63+
4464flag split-these
4565 description: Use split these/semialign packages
4666 manual: False
4767 default: True
4868
4969library
70+ default-language: Haskell2010
5071 hs-source-dirs: src
5172 build-depends:
5273 MemoTrie == 0.6.*,
53− base >= 4.9 && < 4.14,
74+ base >= 4.11 && < 4.15,
5475 bifunctors >= 5.2 && < 5.6,
5576 comonad >= 5.0.4 && < 5.1,
77+ constraints >= 0.10 && <0.14,
5678 constraints-extras >= 0.3 && < 0.4,
5779 containers >= 0.6 && < 0.7,
5880 data-default >= 0.5 && < 0.8,
59− dependent-map >= 0.3 && < 0.4,
81+ dependent-map >= 0.3 && < 0.5,
6082 exception-transformers == 0.4.*,
6183 lens >= 4.7 && < 5,
84+ mmorph >= 1.0 && < 1.2,
6285 monad-control >= 1.0.1 && < 1.1,
6386 mtl >= 2.1 && < 2.3,
64− prim-uniq >= 0.1.0.1 && < 0.2,
87+ patch >= 0.0.1 && < 0.1,
88+ prim-uniq >= 0.1.0.1 && < 0.3,
6589 primitive >= 0.5 && < 0.8,
66− profunctors >= 5.3 && < 5.6,
90+ profunctors >= 5.3 && < 5.7,
6791 random == 1.1.*,
6892 ref-tf == 0.4.*,
6993 reflection == 2.1.*,
@@ -73,10 +97,10 @@ library
7397 time >= 1.4 && < 1.10,
7498 transformers >= 0.5.6.0 && < 0.6,
7599 unbounded-delays >= 0.1.0.0 && < 0.2,
76− witherable >= 0.3 && < 0.3.2
100+ witherable >= 0.3 && < 0.5
77101
78102 if flag(split-these)
79− build-depends: these >= 1 && <1.1,
103+ build-depends: these >= 1 && <1.2,
80104 semialign >=1 && <1.2,
81105 monoidal-containers >= 0.6 && < 0.7
82106 else
@@ -88,7 +112,6 @@ library
88112 Data.AppendMap,
89113 Data.FastMutableIntMap,
90114 Data.FastWeakBag,
91− Data.Functor.Misc,
92115 Data.Map.Misc,
93116 Data.WeakBag,
94117 Reflex,
@@ -108,15 +131,9 @@ library
108131 Reflex.FastWeak,
109132 Reflex.FunctorMaybe,
110133 Reflex.Host.Class,
134+ Reflex.Host.Headless,
111135 Reflex.Network,
112136 Reflex.NotReady.Class,
113− Reflex.Patch,
114− Reflex.Patch.Class,
115− Reflex.Patch.DMap,
116− Reflex.Patch.DMapWithMove,
117− Reflex.Patch.IntMap,
118− Reflex.Patch.Map,
119− Reflex.Patch.MapWithMove,
120137 Reflex.PerformEvent.Base,
121138 Reflex.PerformEvent.Class,
122139 Reflex.PostBuild.Base,
@@ -135,38 +152,57 @@ library
135152 Reflex.Widget.Basic,
136153 Reflex.Workflow
137154
155+ reexported-modules:
156+ patch:Data.Functor.Misc,
157+ patch:Data.Patch as Reflex.Patch,
158+ patch:Data.Patch.Class as Reflex.Patch.Class,
159+ patch:Data.Patch.DMap as Reflex.Patch.DMap,
160+ patch:Data.Patch.DMapWithMove as Reflex.Patch.DMapWithMove,
161+ patch:Data.Patch.IntMap as Reflex.Patch.IntMap,
162+ patch:Data.Patch.Map as Reflex.Patch.Map,
163+ patch:Data.Patch.MapWithMove as Reflex.Patch.MapWithMove
164+
138165 ghc-options: -Wall -fwarn-redundant-constraints -fwarn-tabs -funbox-strict-fields -O2 -fspecialise-aggressively
139166
140167 if flag(debug-trace-events)
141168 cpp-options: -DDEBUG_TRACE_EVENTS
142− build-depends: bytestring
169+ build-depends:
170+ bytestring >= 0.10.8 && < 0.11
143171
144172 if flag(use-reflex-optimizer)
145173 cpp-options: -DUSE_REFLEX_OPTIMIZER
146174 build-depends: ghc
147175 exposed-modules: Reflex.Optimizer
148176
177+ if flag(debug-propagation)
178+ cpp-options: -DDEBUG -DDEBUG_TRACE_PROPAGATION -DDEBUG_TRACE_INVALIDATION
179+
180+ if flag(debug-cycles)
181+ cpp-options: -DDEBUG_CYCLES
182+
149183 if flag(use-template-haskell)
150184 cpp-options: -DUSE_TEMPLATE_HASKELL
151185 build-depends:
152− dependent-sum >= 0.6 && < 0.7,
153− haskell-src-exts >= 1.16 && < 1.23,
186+ dependent-sum >= 0.6 && < 0.8,
187+ haskell-src-exts >= 1.16 && < 1.24,
154188 haskell-src-meta >= 0.6 && < 0.9,
155− template-haskell >= 2.9 && < 2.16
189+ template-haskell >= 2.9 && < 2.17
156190 exposed-modules:
157191 Reflex.Dynamic.TH
158192 other-extensions: TemplateHaskell
159193 else
160194 build-depends:
161− dependent-sum >= 0.6 && < 0.7
195+ dependent-sum >= 0.6 && < 0.8
162196
163197 if flag(fast-weak) && impl(ghcjs)
164198 cpp-options: -DGHCJS_FAST_WEAK
165199
166200 if impl(ghcjs)
167− build-depends: ghcjs-base
201+ build-depends:
202+ ghcjs-base == 0.2.*
168203
169204test-suite semantics
205+ default-language: Haskell2010
170206 type: exitcode-stdio-1.0
171207 main-is: semantics.hs
172208 hs-source-dirs: test
@@ -192,6 +228,7 @@ test-suite semantics
192228 Reflex.TestPlan
193229
194230test-suite CrossImpl
231+ default-language: Haskell2010
195232 type: exitcode-stdio-1.0
196233 main-is: Reflex/Test/CrossImpl.hs
197234 hs-source-dirs: test
@@ -213,6 +250,7 @@ test-suite CrossImpl
213250 Reflex.Plan.Pure
214251
215252test-suite hlint
253+ default-language: Haskell2010
216254 type: exitcode-stdio-1.0
217255 main-is: hlint.hs
218256 hs-source-dirs: test
@@ -220,11 +258,15 @@ test-suite hlint
220258 , directory
221259 , filepath
222260 , filemanip
223− , hlint < 2.1 || >= 2.2.2
261+ if impl(ghc >= 8.8)
262+ build-depends: hlint >= 3 && < 4
263+ else
264+ build-depends: hlint (< 2.1 || >= 2.2.2) && < 4
224265 if impl(ghcjs)
225266 buildable: False
226267
227268test-suite EventWriterT
269+ default-language: Haskell2010
228270 type: exitcode-stdio-1.0
229271 main-is: EventWriterT.hs
230272 hs-source-dirs: test
@@ -244,28 +286,57 @@ test-suite EventWriterT
244286 build-depends: these-lens
245287
246288 other-modules:
247− Reflex.Test
248− Reflex.TestPlan
249− Reflex.Plan.Reflex
250− Reflex.Plan.Pure
251289 Test.Run
252290
253291
254−test-suite RequesterT
292+test-suite DebugCycles
293+ default-language: Haskell2010
255294 type: exitcode-stdio-1.0
256− main-is: RequesterT.hs
295+ main-is: DebugCycles.hs
257296 hs-source-dirs: test
297+ ghc-options: -threaded
258298 build-depends: base
259299 , containers
260300 , deepseq
261− , dependent-sum
262301 , dependent-map
302+ , dependent-sum
303+ , hspec
263304 , lens
264305 , mtl
265306 , these
266307 , transformers
267308 , reflex
268309 , ref-tf
310+ , witherable
311+ , proctest
312+
313+
314+ if flag(split-these)
315+ build-depends: these-lens, semialign
316+
317+ other-modules:
318+ Test.Run
319+
320+
321+test-suite RequesterT
322+ default-language: Haskell2010
323+ type: exitcode-stdio-1.0
324+ main-is: RequesterT.hs
325+ hs-source-dirs: test
326+ build-depends: base
327+ , constraints
328+ , constraints-extras
329+ , containers
330+ , deepseq
331+ , dependent-map
332+ , dependent-sum
333+ , lens
334+ , mtl
335+ , ref-tf
336+ , reflex
337+ , text
338+ , these
339+ , transformers
269340
270341 if flag(split-these)
271342 build-depends: these-lens
@@ -275,7 +346,31 @@ test-suite RequesterT
275346 Reflex.Plan.Pure
276347 Test.Run
277348
349+test-suite Headless
350+ default-language: Haskell2010
351+ type: exitcode-stdio-1.0
352+ main-is: Headless.hs
353+ hs-source-dirs: test
354+ build-depends: base
355+ , reflex
356+
357+test-suite Adjustable
358+ default-language: Haskell2010
359+ type: exitcode-stdio-1.0
360+ main-is: Adjustable.hs
361+ hs-source-dirs: test
362+ build-depends: base
363+ , containers
364+ , dependent-sum
365+ , reflex
366+ , ref-tf
367+ , these
368+
369+ other-modules:
370+ Test.Run
371+
278372test-suite QueryT
373+ default-language: Haskell2010
279374 type: exitcode-stdio-1.0
280375 main-is: QueryT.hs
281376 hs-source-dirs: test
@@ -287,6 +382,7 @@ test-suite QueryT
287382 , lens
288383 , monoidal-containers
289384 , mtl
385+ , patch
290386 , ref-tf
291387 , reflex
292388 , these
@@ -302,6 +398,7 @@ test-suite QueryT
302398 Reflex.Plan.Pure
303399
304400test-suite GC-Semantics
401+ default-language: Haskell2010
305402 type: exitcode-stdio-1.0
306403 main-is: GC.hs
307404 hs-source-dirs: test
@@ -311,6 +408,7 @@ test-suite GC-Semantics
311408 , dependent-map
312409 , deepseq
313410 , mtl
411+ , patch
314412 , these
315413 , transformers
316414 , reflex
@@ -326,6 +424,7 @@ test-suite GC-Semantics
326424 Test.Run
327425
328426test-suite rootCleanup
427+ default-language: Haskell2010
329428 type: exitcode-stdio-1.0
330429 main-is: rootCleanup.hs
331430 hs-source-dirs: test
@@ -343,6 +442,7 @@ test-suite rootCleanup
343442 Test.Run
344443
345444benchmark spider-bench
445+ default-language: Haskell2010
346446 type: exitcode-stdio-1.0
347447 hs-source-dirs: bench test
348448 main-is: Main.hs
@@ -367,6 +467,7 @@ benchmark spider-bench
367467 Reflex.Bench.Focused
368468
369469benchmark saulzar-bench
470+ default-language: Haskell2010
370471 type: exitcode-stdio-1.0
371472 hs-source-dirs: bench test
372473 c-sources: bench-cbits/checkCapability.c
release.nix+2−2
@@ -1,12 +1,12 @@
11{ reflex-platform-fun ? import ./dep/reflex-platform
2+, supportedSystems ? ["x86_64-linux" "x86_64-darwin"]
23}:
34
45let
56 native-reflex-platform = reflex-platform-fun {};
67 inherit (native-reflex-platform.nixpkgs) lib;
7− systems = ["x86_64-linux" "x86_64-darwin"];
88
9− perPlatform = lib.genAttrs systems (system: let
9+ perPlatform = lib.genAttrs supportedSystems (system: let
1010 reflex-platform = reflex-platform-fun { inherit system; };
1111 compilers = [
1212 "ghc"
src/Data/AppendMap.hs+1−1
@@ -71,7 +71,7 @@ mapMaybeNoNull f as =
7171 then Nothing
7272 else Just bs
7373
74−-- TODO: Move instances to `Reflex.Patch`
74+-- TODO: Move instances to `Data.Patch`
7575-- | Displays a 'MonoidalMap' as a tree. See 'Data.Map.Lazy.showTree' for details.
7676showTree :: forall k a. (Show k, Show a) => MonoidalMap k a -> String
7777showTree = coerce (Map.showTree :: Map k a -> String)
src/Data/FastMutableIntMap.hs+7−3
@@ -21,6 +21,7 @@ module Data.FastMutableIntMap
2121 , patchIntMapNewElements
2222 , patchIntMapNewElementsMap
2323 , getDeletions
24+ , toList
2425 ) where
2526
2627--TODO: Pure JS version
@@ -34,8 +35,8 @@ import Data.Foldable (traverse_)
3435import Data.IntMap.Strict (IntMap)
3536import qualified Data.IntMap.Strict as IntMap
3637import Data.IORef
37−import Reflex.Patch.Class
38−import Reflex.Patch.IntMap
38+import Data.Patch.Class
39+import Data.Patch.IntMap
3940
4041-- | A 'FastMutableIntMap' holds a map of values of type @a@ and allows low-overhead modifications via IO.
4142-- Operations on 'FastMutableIntMap' run in IO.
@@ -84,10 +85,13 @@ getFrozenAndClear (FastMutableIntMap r) = do
8485 writeIORef r IntMap.empty
8586 return result
8687
87−-- | Updates the value of a 'FastMutableIntMap' with the given patch (see 'Reflex.Patch.IntMap'),
88+-- | Updates the value of a 'FastMutableIntMap' with the given patch (see 'Data.Patch.IntMap'),
8889-- and returns an 'IntMap' with the modified keys and values.
8990applyPatch :: FastMutableIntMap a -> PatchIntMap a -> IO (IntMap a)
9091applyPatch (FastMutableIntMap r) p@(PatchIntMap m) = do
9192 v <- readIORef r
9293 writeIORef r $! applyAlways p v
9394 return $ IntMap.intersection v m
95+
96+toList :: FastMutableIntMap a -> IO [(Int, a)]
97+toList (FastMutableIntMap r) = IntMap.toList <$> readIORef r
src/Data/Functor/Misc.hsdeleted−235
@@ -1,235 +0,0 @@
1−{-# LANGUAGE CPP #-}
2−{-# LANGUAGE DeriveDataTypeable #-}
3−{-# LANGUAGE DeriveFunctor #-}
4−{-# LANGUAGE FlexibleContexts #-}
5−{-# LANGUAGE FlexibleInstances #-}
6−{-# LANGUAGE GADTs #-}
7−{-# LANGUAGE LambdaCase #-}
8−{-# LANGUAGE MultiParamTypeClasses #-}
9−{-# LANGUAGE PatternSynonyms #-}
10−{-# LANGUAGE PolyKinds #-}
11−{-# LANGUAGE RankNTypes #-}
12−{-# LANGUAGE ScopedTypeVariables #-}
13−{-# LANGUAGE StandaloneDeriving #-}
14−#ifdef USE_REFLEX_OPTIMIZER
15−{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
16−#endif
17−-- | This module provides types and functions with no particular theme, but
18−-- which are relevant to the use of 'Functor'-based datastructures like
19−-- 'Data.Dependent.Map.DMap'.
20−module Data.Functor.Misc
21− ( -- * Const2
22− Const2 (..)
23− , unConst2
24− , dmapToMap
25− , dmapToIntMap
26− , dmapToMapWith
27− , mapToDMap
28− , weakenDMapWith
29− -- * WrapArg
30− , WrapArg (..)
31− -- * Convenience functions for DMap
32− , mapWithFunctorToDMap
33− , intMapWithFunctorToDMap
34− , mapKeyValuePairsMonotonic
35− , combineDMapsWithKey
36− , EitherTag (..)
37− , dmapToThese
38− , eitherToDSum
39− , dsumToEither
40− , ComposeMaybe (..)
41− ) where
42−
43−import Control.Applicative ((<$>))
44−import Control.Monad.Identity
45−import Data.Dependent.Map (DMap)
46−import qualified Data.Dependent.Map as DMap
47−import Data.Dependent.Sum
48−import Data.GADT.Compare
49−import Data.GADT.Show
50−import Data.IntMap (IntMap)
51−import qualified Data.IntMap as IntMap
52−import Data.Map (Map)
53−import qualified Data.Map as Map
54−import Data.Some (Some(Some))
55−import Data.These
56−import Data.Type.Equality ((:~:)(Refl))
57−import Data.Typeable hiding (Refl)
58−
59−--------------------------------------------------------------------------------
60−-- Const2
61−--------------------------------------------------------------------------------
62−
63−-- | 'Const2' stores a value of a given type 'k' and ensures that a particular
64−-- type 'v' is always given for the last type parameter
65−data Const2 :: * -> x -> x -> * where
66− Const2 :: k -> Const2 k v v
67− deriving (Typeable)
68−
69−-- | Extract the value from a Const2
70−unConst2 :: Const2 k v v' -> k
71−unConst2 (Const2 k) = k
72−
73−deriving instance Eq k => Eq (Const2 k v v')
74−deriving instance Ord k => Ord (Const2 k v v')
75−deriving instance Show k => Show (Const2 k v v')
76−deriving instance Read k => Read (Const2 k v v)
77−
78−instance Show k => GShow (Const2 k v) where
79− gshowsPrec n x@(Const2 _) = showsPrec n x
80−
81−instance Eq k => GEq (Const2 k v) where
82− geq (Const2 a) (Const2 b) =
83− if a == b
84− then Just Refl
85− else Nothing
86−
87−instance Ord k => GCompare (Const2 k v) where
88− gcompare (Const2 a) (Const2 b) = case compare a b of
89− LT -> GLT
90− EQ -> GEQ
91− GT -> GGT
92−
93−-- | Convert a 'DMap' to a regular 'Map'
94−dmapToMap :: DMap (Const2 k v) Identity -> Map k v
95−dmapToMap = Map.fromDistinctAscList . map (\(Const2 k :=> Identity v) -> (k, v)) . DMap.toAscList
96−
97−-- | Convert a 'DMap' to an 'IntMap'
98−dmapToIntMap :: DMap (Const2 IntMap.Key v) Identity -> IntMap v
99−dmapToIntMap = IntMap.fromDistinctAscList . map (\(Const2 k :=> Identity v) -> (k, v)) . DMap.toAscList
100−
101−-- | Convert a 'DMap' to a regular 'Map', applying the given function to remove
102−-- the wrapping 'Functor'
103−dmapToMapWith :: (f v -> v') -> DMap (Const2 k v) f -> Map k v'
104−dmapToMapWith f = Map.fromDistinctAscList . map (\(Const2 k :=> v) -> (k, f v)) . DMap.toAscList
105−
106−-- | Convert a regular 'Map' to a 'DMap'
107−mapToDMap :: Map k v -> DMap (Const2 k v) Identity
108−mapToDMap = DMap.fromDistinctAscList . map (\(k, v) -> Const2 k :=> Identity v) . Map.toAscList
109−
110−-- | Convert a regular 'Map', where the values are already wrapped in a functor,
111−-- to a 'DMap'
112−mapWithFunctorToDMap :: Map k (f v) -> DMap (Const2 k v) f
113−mapWithFunctorToDMap = DMap.fromDistinctAscList . map (\(k, v) -> Const2 k :=> v) . Map.toAscList
114−
115−-- | Convert a regular 'IntMap', where the values are already wrapped in a
116−-- functor, to a 'DMap'
117−intMapWithFunctorToDMap :: IntMap (f v) -> DMap (Const2 IntMap.Key v) f
118−intMapWithFunctorToDMap = DMap.fromDistinctAscList . map (\(k, v) -> Const2 k :=> v) . IntMap.toAscList
119−
120−-- | Convert a 'DMap' to a regular 'Map' by forgetting the types associated with
121−-- the keys, using a function to remove the wrapping 'Functor'
122−weakenDMapWith :: (forall a. v a -> v') -> DMap k v -> Map (Some k) v'
123−weakenDMapWith f = Map.fromDistinctAscList . map (\(k :=> v) -> (Some k, f v)) . DMap.toAscList
124−
125−--------------------------------------------------------------------------------
126−-- WrapArg
127−--------------------------------------------------------------------------------
128−
129−-- | 'WrapArg' can be used to tag a value in one functor with a type
130−-- representing another functor. This was primarily used with dependent-map <
131−-- 0.2, in which the value type was not wrapped in a separate functor.
132−data WrapArg :: (k -> *) -> (k -> *) -> * -> * where
133− WrapArg :: f a -> WrapArg g f (g a)
134−
135−deriving instance Eq (f a) => Eq (WrapArg g f (g' a))
136−deriving instance Ord (f a) => Ord (WrapArg g f (g' a))
137−deriving instance Show (f a) => Show (WrapArg g f (g' a))
138−deriving instance Read (f a) => Read (WrapArg g f (g a))
139−
140−instance GEq f => GEq (WrapArg g f) where
141− geq (WrapArg a) (WrapArg b) = (\Refl -> Refl) <$> geq a b
142−
143−instance GCompare f => GCompare (WrapArg g f) where
144− gcompare (WrapArg a) (WrapArg b) = case gcompare a b of
145− GLT -> GLT
146− GEQ -> GEQ
147− GGT -> GGT
148−
149−--------------------------------------------------------------------------------
150−-- Convenience functions for DMap
151−--------------------------------------------------------------------------------
152−
153−-- | Map over all key/value pairs in a 'DMap', potentially altering the key as
154−-- well as the value. The provided function MUST preserve the ordering of the
155−-- keys, or the resulting 'DMap' will be malformed.
156−mapKeyValuePairsMonotonic :: (DSum k v -> DSum k' v') -> DMap k v -> DMap k' v'
157−mapKeyValuePairsMonotonic f = DMap.fromDistinctAscList . map f . DMap.toAscList
158−
159−{-# INLINE combineDMapsWithKey #-}
160−-- | Union two 'DMap's of different types, yielding another type. Each key that
161−-- is present in either input map will be present in the output.
162−combineDMapsWithKey :: forall f g h i.
163− GCompare f
164− => (forall a. f a -> These (g a) (h a) -> i a)
165− -> DMap f g
166− -> DMap f h
167− -> DMap f i
168−combineDMapsWithKey f mg mh = DMap.fromList $ go (DMap.toList mg) (DMap.toList mh)
169− where go :: [DSum f g] -> [DSum f h] -> [DSum f i]
170− go [] hs = map (\(hk :=> hv) -> hk :=> f hk (That hv)) hs
171− go gs [] = map (\(gk :=> gv) -> gk :=> f gk (This gv)) gs
172− go gs@((gk :=> gv) : gs') hs@((hk :=> hv) : hs') = case gk `gcompare` hk of
173− GLT -> (gk :=> f gk (This gv)) : go gs' hs
174− GEQ -> (gk :=> f gk (These gv hv)) : go gs' hs'
175− GGT -> (hk :=> f hk (That hv)) : go gs hs'
176−
177−-- | Extract the values of a 'DMap' of 'EitherTag's.
178−dmapToThese :: DMap (EitherTag a b) Identity -> Maybe (These a b)
179−dmapToThese m = case (DMap.lookup LeftTag m, DMap.lookup RightTag m) of
180− (Nothing, Nothing) -> Nothing
181− (Just (Identity a), Nothing) -> Just $ This a
182− (Nothing, Just (Identity b)) -> Just $ That b
183− (Just (Identity a), Just (Identity b)) -> Just $ These a b
184−
185−-- | Tag type for 'Either' to use it as a 'DSum'.
186−data EitherTag l r a where
187− LeftTag :: EitherTag l r l
188− RightTag :: EitherTag l r r
189− deriving (Typeable)
190−
191−deriving instance Show (EitherTag l r a)
192−deriving instance Eq (EitherTag l r a)
193−deriving instance Ord (EitherTag l r a)
194−
195−instance GEq (EitherTag l r) where
196− geq a b = case (a, b) of
197− (LeftTag, LeftTag) -> Just Refl
198− (RightTag, RightTag) -> Just Refl
199− _ -> Nothing
200−
201−instance GCompare (EitherTag l r) where
202− gcompare a b = case (a, b) of
203− (LeftTag, LeftTag) -> GEQ
204− (LeftTag, RightTag) -> GLT
205− (RightTag, LeftTag) -> GGT
206− (RightTag, RightTag) -> GEQ
207−
208−instance GShow (EitherTag l r) where
209− gshowsPrec _ a = case a of
210− LeftTag -> showString "LeftTag"
211− RightTag -> showString "RightTag"
212−
213−-- | Convert 'Either' to a 'DSum'. Inverse of 'dsumToEither'.
214−eitherToDSum :: Either a b -> DSum (EitherTag a b) Identity
215−eitherToDSum = \case
216− Left a -> (LeftTag :=> Identity a)
217− Right b -> (RightTag :=> Identity b)
218−
219−-- | Convert 'DSum' to 'Either'. Inverse of 'eitherToDSum'.
220−dsumToEither :: DSum (EitherTag a b) Identity -> Either a b
221−dsumToEither = \case
222− (LeftTag :=> Identity a) -> Left a
223− (RightTag :=> Identity b) -> Right b
224−
225−--------------------------------------------------------------------------------
226−-- ComposeMaybe
227−--------------------------------------------------------------------------------
228−
229−-- | We can't use @Compose Maybe@ instead of 'ComposeMaybe', because that would
230−-- make the 'f' parameter have a nominal type role. We need f to be
231−-- representational so that we can use safe 'coerce'.
232−newtype ComposeMaybe f a =
233− ComposeMaybe { getComposeMaybe :: Maybe (f a) } deriving (Show, Eq, Ord)
234−
235−deriving instance Functor f => Functor (ComposeMaybe f)
src/Data/Map/Misc.hs+1−1
@@ -43,7 +43,7 @@ diffMap olds news = flip Map.mapMaybe (align olds news) $ \case
4343
4444-- |Given a @'Map' k (Maybe v)@ representing keys to insert/update (@Just@) or delete (@Nothing@), produce a new map from the given input @'Map' k v@.
4545--
46−-- See also 'Reflex.Patch.Map' and 'Reflex.Patch.MapWithMove'.
46+-- See also 'Data.Patch.Map' and 'Data.Patch.MapWithMove'.
4747applyMap :: Ord k => Map k (Maybe v) -> Map k v -> Map k v
4848applyMap patch old = insertions `Map.union` (old `Map.difference` deletions)
4949 where (deletions, insertions) = Map.mapEither maybeToEither patch
src/Reflex/Adjustable/Class.hs+3−2
@@ -30,7 +30,8 @@ module Reflex.Adjustable.Class
3030
3131import Control.Monad.Identity
3232import Control.Monad.Reader
33−import Data.Dependent.Map (DMap, GCompare (..))
33+import Data.Dependent.Map (DMap)
34+import Data.GADT.Compare (GCompare(..))
3435import qualified Data.Dependent.Map as DMap
3536import Data.Functor.Constant
3637import Data.Functor.Misc
@@ -39,7 +40,7 @@ import qualified Data.IntMap.Strict as IntMap
3940import Data.Map (Map)
4041
4142import Reflex.Class
42−import Reflex.Patch.DMapWithMove
43+import Data.Patch.DMapWithMove
4344
4445-- | A 'Monad' that supports adjustment over time. After an action has been
4546-- run, if the given events fire, it will adjust itself so that its net effect
src/Reflex/BehaviorWriter/Base.hs+16−7
@@ -1,6 +1,6 @@
11{-|
22Module: Reflex.BehaviorWriter.Base
3−Description: Implementation of MonadBehaviorWriter
3+Description: Implementation of BehaviorWriter
44-}
55{-# LANGUAGE CPP #-}
66{-# LANGUAGE FlexibleInstances #-}
@@ -24,6 +24,7 @@ module Reflex.BehaviorWriter.Base
2424import Control.Monad.Exception
2525import Control.Monad.Identity
2626import Control.Monad.IO.Class
27+import Control.Monad.Morph
2728import Control.Monad.Reader
2829import Control.Monad.Ref
2930import Control.Monad.State.Strict
@@ -46,9 +47,20 @@ import Reflex.Query.Class
4647import Reflex.Requester.Class
4748import Reflex.TriggerEvent.Class
4849
49−-- | A basic implementation of 'MonadBehaviorWriter'.
50+-- | A basic implementation of 'BehaviorWriter'.
5051newtype BehaviorWriterT t w m a = BehaviorWriterT { unBehaviorWriterT :: StateT [Behavior t w] m a }
51− deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadAsyncException, MonadException) -- The list is kept in reverse order
52+ -- The list is kept in reverse order
53+ deriving
54+ ( Functor
55+ , Applicative
56+ , Monad
57+ , MonadTrans
58+ , MFunctor
59+ , MonadIO
60+ , MonadFix
61+ , MonadAsyncException
62+ , MonadException
63+ )
5264
5365-- | Run a 'BehaviorWriterT' action. The behavior writer output will be provided
5466-- along with the result of the action.
@@ -73,9 +85,6 @@ withBehaviorWriterT f dw = do
7385deriving instance MonadHold t m => MonadHold t (BehaviorWriterT t w m)
7486deriving instance MonadSample t m => MonadSample t (BehaviorWriterT t w m)
7587
76−instance MonadTrans (BehaviorWriterT t w) where
77− lift = BehaviorWriterT . lift
78−
7988instance MonadRef m => MonadRef (BehaviorWriterT t w m) where
8089 type Ref (BehaviorWriterT t w m) = Ref m
8190 newRef = lift . newRef
@@ -89,7 +98,7 @@ instance MonadReflexCreateTrigger t m => MonadReflexCreateTrigger t (BehaviorWri
8998 newEventWithTrigger = lift . newEventWithTrigger
9099 newFanEventWithTrigger f = lift $ newFanEventWithTrigger f
91100
92−instance (Monad m, Monoid w, Reflex t) => MonadBehaviorWriter t w (BehaviorWriterT t w m) where
101+instance (Monad m, Monoid w, Reflex t) => BehaviorWriter t w (BehaviorWriterT t w m) where
93102 tellBehavior w = BehaviorWriterT $ modify (w :)
94103
95104instance MonadReader r m => MonadReader r (BehaviorWriterT t w m) where
src/Reflex/BehaviorWriter/Class.hs+11−5
@@ -1,8 +1,9 @@
11{-|
22Module: Reflex.BehaviorWriter.Class
3−Description: This module defines the 'MonadBehaviorWriter' class
3+Description: This module defines the 'BehaviorWriter' class
44-}
55{-# LANGUAGE CPP #-}
6+{-# LANGUAGE ConstraintKinds #-}
67{-# LANGUAGE FlexibleInstances #-}
78{-# LANGUAGE FunctionalDependencies #-}
89{-# LANGUAGE UndecidableInstances #-}
@@ -10,16 +11,21 @@ Description: This module defines the 'MonadBehaviorWriter' class
1011{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
1112#endif
1213module Reflex.BehaviorWriter.Class
13− ( MonadBehaviorWriter (..)
14+ ( MonadBehaviorWriter
15+ , BehaviorWriter(..)
1416 ) where
1517
1618import Control.Monad.Reader (ReaderT, lift)
1719import Reflex.Class (Behavior)
1820
19−-- | 'MonadBehaviorWriter' efficiently collects 'Behavior' values using 'tellBehavior'
21+{-# DEPRECATED MonadBehaviorWriter "Use 'BehaviorWriter' instead" #-}
22+-- | Type synonym for 'BehaviorWriter'
23+type MonadBehaviorWriter = BehaviorWriter
24+
25+-- | 'BehaviorWriter' efficiently collects 'Behavior' values using 'tellBehavior'
2026-- and combines them monoidally to provide a 'Behavior' result.
21−class (Monad m, Monoid w) => MonadBehaviorWriter t w m | m -> t w where
27+class (Monad m, Monoid w) => BehaviorWriter t w m | m -> t w where
2228 tellBehavior :: Behavior t w -> m ()
2329
24−instance MonadBehaviorWriter t w m => MonadBehaviorWriter t w (ReaderT r m) where
30+instance BehaviorWriter t w m => BehaviorWriter t w (ReaderT r m) where
2531 tellBehavior = lift . tellBehavior
src/Reflex/Class.hs+26−6
@@ -29,7 +29,7 @@
2929-- convenience functions for working with 'Event's, 'Behavior's, and other
3030-- signals.
3131module Reflex.Class
32− ( module Reflex.Patch
32+ ( module Data.Patch
3333 -- * Primitives
3434 , Reflex (..)
3535 , mergeInt
@@ -180,7 +180,7 @@ import Prelude hiding (zip, zipWith)
180180import Data.These.Combinators (justThese)
181181#endif
182182#if MIN_VERSION_semialign(1,1,0)
183−import Data.Zip (Zip (..))
183+import Data.Zip (Zip (..), Unzip (..))
184184#endif
185185#endif
186186
@@ -196,7 +196,8 @@ import Data.Align
196196import Data.Bifunctor
197197import Data.Coerce
198198import Data.Default
199−import Data.Dependent.Map (DMap, DSum (..))
199+import Data.Dependent.Map (DMap)
200+import Data.Dependent.Sum (DSum (..))
200201import qualified Data.Dependent.Map as DMap
201202import Data.Functor.Compose
202203import Data.Functor.Product
@@ -210,7 +211,7 @@ import Data.IntMap.Strict (IntMap)
210211import qualified Data.IntMap.Strict as IntMap
211212import Data.List.NonEmpty (NonEmpty (..))
212213import Data.Map (Map)
213−import Data.Semigroup (Semigroup, sconcat, stimes, (<>))
214+import Data.Semigroup (Semigroup (..))
214215import Data.Some (Some(Some))
215216import Data.String
216217import Data.These
@@ -220,8 +221,8 @@ import Data.Witherable (Filterable(..))
220221import qualified Data.Witherable as W
221222import Reflex.FunctorMaybe (FunctorMaybe)
222223import qualified Reflex.FunctorMaybe
223−import Reflex.Patch
224−import qualified Reflex.Patch.MapWithMove as PatchMapWithMove
224+import Data.Patch
225+import qualified Data.Patch.MapWithMove as PatchMapWithMove
225226
226227import Debug.Trace (trace)
227228
@@ -420,6 +421,13 @@ class MonadSample t m => MonadHold t m where
420421 -- | Create a new 'Event' that only occurs only once, on the first occurrence of
421422 -- the supplied 'Event'.
422423 headE :: Event t a -> m (Event t a)
424+ -- | An event which only occurs at the current moment in time, such that:
425+ --
426+ -- > coincidence (pushAlways (\a -> (a <$) <$> now) e) = e
427+ --
428+ now :: m (Event t ())
429+ default now :: (m ~ f m', MonadTrans f, MonadHold t m') => m (Event t ())
430+ now = lift now
423431
424432-- | Accumulate an 'Incremental' with the supplied initial value and the firings of the provided 'Event',
425433-- using the combining function to produce a patch.
@@ -565,6 +573,7 @@ instance MonadHold t m => MonadHold t (ReaderT r m) where
565573 holdIncremental a0 = lift . holdIncremental a0
566574 buildDynamic a0 = lift . buildDynamic a0
567575 headE = lift . headE
576+ now = lift now
568577
569578instance (MonadSample t m, Monoid r) => MonadSample t (WriterT r m) where
570579 sample = lift . sample
@@ -575,6 +584,7 @@ instance (MonadHold t m, Monoid r) => MonadHold t (WriterT r m) where
575584 holdIncremental a0 = lift . holdIncremental a0
576585 buildDynamic a0 = lift . buildDynamic a0
577586 headE = lift . headE
587+ now = lift now
578588
579589instance MonadSample t m => MonadSample t (StateT s m) where
580590 sample = lift . sample
@@ -585,6 +595,7 @@ instance MonadHold t m => MonadHold t (StateT s m) where
585595 holdIncremental a0 = lift . holdIncremental a0
586596 buildDynamic a0 = lift . buildDynamic a0
587597 headE = lift . headE
598+ now = lift now
588599
589600instance MonadSample t m => MonadSample t (ExceptT e m) where
590601 sample = lift . sample
@@ -595,6 +606,7 @@ instance MonadHold t m => MonadHold t (ExceptT e m) where
595606 holdIncremental a0 = lift . holdIncremental a0
596607 buildDynamic a0 = lift . buildDynamic a0
597608 headE = lift . headE
609+ now = lift now
598610
599611instance (MonadSample t m, Monoid w) => MonadSample t (RWST r w s m) where
600612 sample = lift . sample
@@ -605,6 +617,7 @@ instance (MonadHold t m, Monoid w) => MonadHold t (RWST r w s m) where
605617 holdIncremental a0 = lift . holdIncremental a0
606618 buildDynamic a0 = lift . buildDynamic a0
607619 headE = lift . headE
620+ now = lift now
608621
609622instance MonadSample t m => MonadSample t (ContT r m) where
610623 sample = lift . sample
@@ -615,6 +628,7 @@ instance MonadHold t m => MonadHold t (ContT r m) where
615628 holdIncremental a0 = lift . holdIncremental a0
616629 buildDynamic a0 = lift . buildDynamic a0
617630 headE = lift . headE
631+ now = lift now
618632
619633--------------------------------------------------------------------------------
620634-- Convenience functions
@@ -1091,6 +1105,12 @@ instance Reflex t => Zip (Event t) where
10911105 zip x y = mapMaybe justThese $ align x y
10921106#endif
10931107
1108+#ifdef MIN_VERSION_semialign
1109+#if MIN_VERSION_semialign(1,1,0)
1110+instance Reflex t => Unzip (Event t) where
1111+ unzip = splitE
1112+#endif
1113+#endif
10941114
10951115-- | Create a new 'Event' that only occurs if the supplied 'Event' occurs and
10961116-- the 'Behavior' is true at the time of occurrence.
src/Reflex/Dynamic.hs+15−1
@@ -53,10 +53,12 @@ module Reflex.Dynamic
5353 , foldDynMaybe
5454 , foldDynMaybeM
5555 , joinDynThroughMap
56+ , joinDynThroughIntMap
5657 , traceDyn
5758 , traceDynWith
5859 , splitDynPure
5960 , distributeMapOverDynPure
61+ , distributeIntMapOverDynPure
6062 , distributeDMapOverDynPure
6163 , distributeListOverDynPure
6264 , Demux
@@ -88,6 +90,8 @@ import Data.Dependent.Map (DMap)
8890import qualified Data.Dependent.Map as DMap
8991import Data.Dependent.Sum (DSum (..))
9092import Data.GADT.Compare (GCompare (..), GEq (..), GOrdering (..))
93+import Data.IntMap (IntMap)
94+import qualified Data.IntMap as IntMap
9195import Data.Map (Map)
9296import Data.Maybe
9397import Data.Monoid ((<>))
@@ -202,6 +206,11 @@ splitDynPure d = (fmap fst d, fmap snd d)
202206distributeMapOverDynPure :: (Reflex t, Ord k) => Map k (Dynamic t v) -> Dynamic t (Map k v)
203207distributeMapOverDynPure = fmap dmapToMap . distributeDMapOverDynPure . mapWithFunctorToDMap
204208
209+-- | Convert an 'IntMap' with 'Dynamic' elements into a 'Dynamic' of an 'IntMap' with
210+-- non-'Dynamic' elements.
211+distributeIntMapOverDynPure :: (Reflex t) => IntMap (Dynamic t v) -> Dynamic t (IntMap v)
212+distributeIntMapOverDynPure = fmap dmapToIntMap . distributeDMapOverDynPure . intMapWithFunctorToDMap
213+
205214-- | Convert a list with 'Dynamic' elements into a 'Dynamic' of a list with
206215-- non-'Dynamic' elements, preserving the order of the elements.
207216{-# DEPRECATED distributeListOverDynPure "Use 'distributeListOverDyn' instead" #-}
@@ -214,6 +223,11 @@ distributeListOverDynPure = distributeListOverDyn
214223joinDynThroughMap :: forall t k a. (Reflex t, Ord k) => Dynamic t (Map k (Dynamic t a)) -> Dynamic t (Map k a)
215224joinDynThroughMap = (distributeMapOverDynPure =<<)
216225
226+-- | Combine a 'Dynamic' of an 'IntMap' of 'Dynamic's into a 'Dynamic'
227+-- with the current values of the 'Dynamic's in a map.
228+joinDynThroughIntMap :: forall t a. (Reflex t) => Dynamic t (IntMap (Dynamic t a)) -> Dynamic t (IntMap a)
229+joinDynThroughIntMap = (distributeIntMapOverDynPure =<<)
230+
217231-- | Print the value of the 'Dynamic' when it is first read and on each
218232-- subsequent change that is observed (as 'traceEvent'), prefixed with the
219233-- provided string. This should /only/ be used for debugging.
@@ -334,7 +348,7 @@ factorDyn d = buildDynamic (sample (current d) >>= holdKey) update where
334348--
335349-- > demuxed (demux d) k === fmap (== k) d
336350--
337−-- However, when getDemuxed is used multiple times, the complexity is only
351+-- However, when 'demuxed' is used multiple times, the complexity is only
338352-- /O(log(n))/, rather than /O(n)/ for fmap.
339353data Demux t k = Demux { demuxValue :: Behavior t k
340354 , demuxSelector :: EventSelector t (Const2 k Bool)
src/Reflex/DynamicWriter/Base.hs+14−5
@@ -22,6 +22,7 @@ module Reflex.DynamicWriter.Base
2222import Control.Monad.Exception
2323import Control.Monad.Identity
2424import Control.Monad.IO.Class
25+import Control.Monad.Morph
2526import Control.Monad.Primitive
2627import Control.Monad.Reader
2728import Control.Monad.Ref
@@ -44,16 +45,13 @@ import Reflex.Class
4445import Reflex.DynamicWriter.Class
4546import Reflex.EventWriter.Class (EventWriter, tellEvent)
4647import Reflex.Host.Class
47−import qualified Reflex.Patch.MapWithMove as MapWithMove
48+import qualified Data.Patch.MapWithMove as MapWithMove
4849import Reflex.PerformEvent.Class
4950import Reflex.PostBuild.Class
5051import Reflex.Query.Class
5152import Reflex.Requester.Class
5253import Reflex.TriggerEvent.Class
5354
54−instance MonadTrans (DynamicWriterT t w) where
55− lift = DynamicWriterT . lift
56−
5755mapIncrementalMapValues :: (Reflex t, Patch (p v), Patch (p v'), PatchTarget (p v) ~ f v, PatchTarget (p v') ~ f v', Functor p, Functor f) => (v -> v') -> Incremental t (p v) -> Incremental t (p v')
5856mapIncrementalMapValues f = unsafeMapIncremental (fmap f) (fmap f)
5957
@@ -90,7 +88,18 @@ mergeDynIncrementalWithMove a = unsafeBuildIncremental (mapM (sample . current)
9088
9189-- | A basic implementation of 'DynamicWriter'.
9290newtype DynamicWriterT t w m a = DynamicWriterT { unDynamicWriterT :: StateT [Dynamic t w] m a }
93− deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadAsyncException, MonadException) -- The list is kept in reverse order
91+ -- The list is kept in reverse order
92+ deriving
93+ ( Functor
94+ , Applicative
95+ , Monad
96+ , MonadTrans
97+ , MFunctor
98+ , MonadIO
99+ , MonadFix
100+ , MonadAsyncException
101+ , MonadException
102+ )
94103
95104deriving instance MonadHold t m => MonadHold t (DynamicWriterT t w m)
96105deriving instance MonadSample t m => MonadSample t (DynamicWriterT t w m)
src/Reflex/EventWriter/Base.hs+16−5
@@ -35,12 +35,14 @@ import Reflex.TriggerEvent.Class
3535
3636import Control.Monad.Exception
3737import Control.Monad.Identity
38+import Control.Monad.Morph
3839import Control.Monad.Primitive
3940import Control.Monad.Reader
4041import Control.Monad.Ref
4142import Control.Monad.State.Strict
42−import Data.Dependent.Map (DMap, DSum (..))
43+import Data.Dependent.Map (DMap)
4344import qualified Data.Dependent.Map as DMap
45+import Data.Dependent.Sum (DSum (..))
4446import Data.Functor.Compose
4547import Data.Functor.Misc
4648import Data.GADT.Compare (GCompare (..), GEq (..), GOrdering (..))
@@ -96,7 +98,17 @@ data EventWriterState t w = EventWriterState
9698
9799-- | A basic implementation of 'EventWriter'.
98100newtype EventWriterT t w m a = EventWriterT { unEventWriterT :: StateT (EventWriterState t w) m a }
99− deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException)
101+ deriving
102+ ( Functor
103+ , Applicative
104+ , Monad
105+ , MonadTrans
106+ , MFunctor
107+ , MonadFix
108+ , MonadIO
109+ , MonadException
110+ , MonadAsyncException
111+ )
100112
101113-- | Run a 'EventWriterT' action.
102114runEventWriterT :: forall t m w a. (Reflex t, Monad m, Semigroup w) => EventWriterT t w m a -> m (a, Event t w)
@@ -116,9 +128,6 @@ instance (Reflex t, Monad m, Semigroup w) => EventWriter t w (EventWriterT t w m
116128 , _eventWriterState_told = (tellId myId :=> w) : _eventWriterState_told old
117129 }
118130
119−instance MonadTrans (EventWriterT t w) where
120− lift = EventWriterT . lift
121−
122131instance MonadSample t m => MonadSample t (EventWriterT t w m) where
123132 sample = lift . sample
124133
@@ -133,6 +142,8 @@ instance MonadHold t m => MonadHold t (EventWriterT t w m) where
133142 buildDynamic a0 = lift . buildDynamic a0
134143 {-# INLINABLE headE #-}
135144 headE = lift . headE
145+ {-# INLINABLE now #-}
146+ now = lift now
136147
137148instance (Reflex t, Adjustable t m, MonadHold t m, Semigroup w) => Adjustable t (EventWriterT t w m) where
138149 runWithReplace = runWithReplaceEventWriterTWith $ \dm0 dm' -> lift $ runWithReplace dm0 dm'
src/Reflex/FastWeak.hs+10
@@ -151,6 +151,16 @@ getFastWeakTicket w = do
151151
152152-- | Create a 'FastWeakTicket' directly from a value, creating a 'FastWeak' in the process
153153-- which can be obtained with 'getFastWeakTicketValue'.
154+--
155+-- This function is marked NOINLINE so it is opaque to GHC.
156+-- If we do not do this, then GHC will sometimes fuse the constructor away
157+-- so any weak references that are attached to the ticket will have their
158+-- finalizer run. Using the opaque constructor, GHC does not see the
159+-- constructor application, so it behaves like an IORef and cannot be fused away.
160+--
161+-- The result is also evaluated to WHNF, since forcing a thunk invalidates
162+-- the weak pointer to it in some cases.
163+{-# NOINLINE mkFastWeakTicket #-}
154164mkFastWeakTicket :: a -> IO (FastWeakTicket a)
155165-- I think it's fine if this is lazy - it'll retain the 'a', but so would the output; we just need to make sure it's forced before we start relying on the
156166-- associated FastWeak to actually be weak
src/Reflex/Host/Headless.hsnew file+128
@@ -0,0 +1,128 @@
1+{-# LANGUAGE LambdaCase #-}
2+{-# LANGUAGE FlexibleContexts #-}
3+{-# LANGUAGE RankNTypes #-}
4+{-# LANGUAGE TypeFamilies #-}
5+{-# LANGUAGE ConstraintKinds #-}
6+
7+module Reflex.Host.Headless where
8+
9+import Control.Concurrent.Chan (newChan, readChan)
10+import Control.Monad (unless)
11+import Control.Monad.Fix (MonadFix, fix)
12+import Control.Monad.IO.Class (MonadIO, liftIO)
13+import Control.Monad.Primitive (PrimMonad)
14+import Control.Monad.Ref (MonadRef, Ref, readRef)
15+import Data.Dependent.Sum (DSum (..), (==>))
16+import Data.Foldable (for_)
17+import Data.Functor.Identity (Identity(..))
18+import Data.IORef (IORef, readIORef)
19+import Data.Maybe (catMaybes, fromMaybe)
20+import Data.Traversable (for)
21+
22+import Reflex
23+import Reflex.Host.Class
24+
25+type MonadHeadlessApp t m =
26+ ( Adjustable t m
27+ , MonadFix m
28+ , MonadHold t m
29+ , MonadIO (HostFrame t)
30+ , MonadIO (Performable m)
31+ , MonadIO m
32+ , MonadRef (HostFrame t)
33+ , NotReady t m
34+ , PerformEvent t m
35+ , PostBuild t m
36+ , PrimMonad (HostFrame t)
37+ , Ref (HostFrame t) ~ IORef
38+ , Ref m ~ IORef
39+ , Reflex t
40+ , ReflexHost t
41+ , TriggerEvent t m
42+ )
43+
44+-- | Run a headless FRP network. Inside the action, you will most probably use
45+-- the capabilities provided by the 'TriggerEvent' and 'PerformEvent' type
46+-- classes to interface the FRP network with the outside world. Useful for
47+-- testing. Each headless network runs on its own spider timeline.
48+runHeadlessApp
49+ :: (forall t m. MonadHeadlessApp t m => m (Event t ()))
50+ -- ^ The action to be run in the headless FRP network. The FRP network is
51+ -- closed at the first occurrence of the resulting 'Event'.
52+ -> IO ()
53+runHeadlessApp guest =
54+ -- We are using the 'Spider' implementation of reflex. Running the host
55+ -- allows us to take actions on the FRP timeline.
56+ withSpiderTimeline $ runSpiderHostForTimeline $ do
57+ -- Create the "post-build" event and associated trigger. This event fires
58+ -- once, when the application starts.
59+ (postBuild, postBuildTriggerRef) <- newEventWithTriggerRef
60+ -- Create a queue to which we will write 'Event's that need to be
61+ -- processed.
62+ events <- liftIO newChan
63+ -- Run the "guest" application, providing the appropriate context. We'll
64+ -- pure the result of the action, and a 'FireCommand' that will be used to
65+ -- trigger events.
66+ (result, fc@(FireCommand fire)) <- do
67+ hostPerformEventT $ -- Allows the guest app to run
68+ -- 'performEvent', so that actions
69+ -- (e.g., IO actions) can be run when
70+ -- 'Event's fire.
71+
72+ flip runPostBuildT postBuild $ -- Allows the guest app to access to
73+ -- a "post-build" 'Event'
74+
75+ flip runTriggerEventT events $ -- Allows the guest app to create new
76+ -- events and triggers and write
77+ -- those triggers to a channel from
78+ -- which they will be read and
79+ -- processed.
80+ guest
81+
82+ -- Read the trigger reference for the post-build event. This will be
83+ -- 'Nothing' if the guest application hasn't subscribed to this event.
84+ mPostBuildTrigger <- readRef postBuildTriggerRef
85+
86+ -- Subscribe to an 'Event' of that the guest application can use to
87+ -- request application shutdown. We'll check whether this 'Event' is firing
88+ -- to determine whether to terminate.
89+ shutdown <- subscribeEvent result
90+
91+ -- When there is a subscriber to the post-build event, fire the event.
92+ soa <- for mPostBuildTrigger $ \postBuildTrigger ->
93+ fire [postBuildTrigger :=> Identity ()] $ isFiring shutdown
94+
95+ -- The main application loop. We wait for new events and fire those that
96+ -- have subscribers. If we detect a shutdown request, the application
97+ -- terminates.
98+ unless (or (fromMaybe [] soa)) $ fix $ \loop -> do
99+ -- Read the next event (blocking).
100+ ers <- liftIO $ readChan events
101+ stop <- do
102+ -- Fire events that have subscribers.
103+ fireEventTriggerRefs fc ers $
104+ -- Check if the shutdown 'Event' is firing.
105+ isFiring shutdown
106+ if or stop
107+ then pure ()
108+ else loop
109+ where
110+ isFiring ev = readEvent ev >>= \case
111+ Nothing -> pure False
112+ Just _ -> pure True
113+ -- Use the given 'FireCommand' to fire events that have subscribers
114+ -- and call the callback for the 'TriggerInvocation' of each.
115+ fireEventTriggerRefs
116+ :: MonadIO m
117+ => FireCommand t m
118+ -> [DSum (EventTriggerRef t) TriggerInvocation]
119+ -> ReadPhase m a
120+ -> m [a]
121+ fireEventTriggerRefs (FireCommand fire) ers rcb = do
122+ mes <- liftIO $
123+ for ers $ \(EventTriggerRef er :=> TriggerInvocation a _) -> do
124+ me <- readIORef er
125+ pure $ fmap (==> a) me
126+ a <- fire (catMaybes mes) rcb
127+ liftIO $ for_ ers $ \(_ :=> TriggerInvocation _ cb) -> cb
128+ pure a
src/Reflex/Patch.hsdeleted−99
@@ -1,99 +0,0 @@
1−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
2−{-# LANGUAGE StandaloneDeriving #-}
3−{-# LANGUAGE TypeFamilies #-}
4−{-# LANGUAGE TypeOperators #-}
5−-- |
6−-- Module:
7−-- Reflex.Patch
8−-- Description:
9−-- This module defines the 'Patch' class, which is used by Reflex to manage
10−-- changes to 'Reflex.Class.Incremental' values.
11−module Reflex.Patch
12− ( module Reflex.Patch
13− , module X
14− ) where
15−
16−import Reflex.Patch.Class as X
17−import Reflex.Patch.DMap as X hiding (getDeletions)
18−import Reflex.Patch.DMapWithMove as X (PatchDMapWithMove, const2PatchDMapWithMoveWith, mapPatchDMapWithMove,
19− patchDMapWithMoveToPatchMapWithMoveWith,
20− traversePatchDMapWithMoveWithKey, unPatchDMapWithMove,
21− unsafePatchDMapWithMove, weakenPatchDMapWithMoveWith)
22−import Reflex.Patch.IntMap as X hiding (getDeletions)
23−import Reflex.Patch.Map as X
24−import Reflex.Patch.MapWithMove as X (PatchMapWithMove, patchMapWithMoveNewElements,
25− patchMapWithMoveNewElementsMap, unPatchMapWithMove,
26− unsafePatchMapWithMove)
27−import Data.Map.Monoidal (MonoidalMap)
28−import Data.Semigroup (Semigroup (..), (<>))
29−import GHC.Generics
30−import Data.Functor.Identity
31−import Data.Functor.Const
32−import Data.Proxy
33−import Control.Applicative
34−
35−-- | A 'Group' is a 'Monoid' where every element has an inverse.
36−class (Semigroup q, Monoid q) => Group q where
37− negateG :: q -> q
38− (~~) :: q -> q -> q
39− r ~~ s = r <> negateG s
40−
41−-- | An 'Additive' 'Semigroup' is one where (<>) is commutative
42−class Semigroup q => Additive q where
43−
44−-- | The elements of an 'Additive' 'Semigroup' can be considered as patches of their own type.
45−newtype AdditivePatch p = AdditivePatch { unAdditivePatch :: p }
46−
47−instance Additive p => Patch (AdditivePatch p) where
48− type PatchTarget (AdditivePatch p) = p
49− apply (AdditivePatch p) q = Just $ p <> q
50−
51−instance (Ord k, Group q) => Group (MonoidalMap k q) where
52− negateG = fmap negateG
53−
54−instance (Ord k, Additive q) => Additive (MonoidalMap k q)
55−
56−-- | Trivial group.
57−instance Group () where
58− negateG _ = ()
59− _ ~~ _ = ()
60−instance Additive ()
61−
62−-- | Product group. A Pair of groups gives rise to a group
63−instance (Group a, Group b) => Group (a, b) where
64− negateG (a, b) = (negateG a, negateG b)
65− (a, b) ~~ (c, d) = (a ~~ c, b ~~ d)
66−instance (Additive a, Additive b) => Additive (a, b)
67−
68−-- See https://gitlab.haskell.org/ghc/ghc/issues/11135#note_111802 for the reason Compose is not also provided.
69−-- Base does not define Monoid (Compose f g a) so this is the best we can
70−-- really do for functor composition.
71−instance Group (f (g a)) => Group ((f :.: g) a) where
72− negateG (Comp1 xs) = Comp1 (negateG xs)
73− Comp1 xs ~~ Comp1 ys = Comp1 (xs ~~ ys)
74−instance Additive (f (g a)) => Additive ((f :.: g) a)
75−
76−-- | Product of groups, Functor style.
77−instance (Group (f a), Group (g a)) => Group ((f :*: g) a) where
78− negateG (a :*: b) = negateG a :*: negateG b
79− (a :*: b) ~~ (c :*: d) = (a ~~ c) :*: (b ~~ d)
80−instance (Additive (f a), Additive (g a)) => Additive ((f :*: g) a)
81−
82−-- | Trivial group, Functor style
83−instance Group (Proxy x) where
84− negateG _ = Proxy
85− _ ~~ _ = Proxy
86−instance Additive (Proxy x)
87−
88−-- | Const lifts groups into a functor.
89−deriving instance Group a => Group (Const a x)
90−instance Additive a => Additive (Const a x)
91−-- | Ideitnty lifts groups pointwise (at only one point)
92−deriving instance Group a => Group (Identity a)
93−instance Additive a => Additive (Identity a)
94−
95−-- | Functions lift groups pointwise.
96−instance Group b => Group (a -> b) where
97− negateG f = negateG . f
98− (~~) = liftA2 (~~)
99−instance Additive b => Additive (a -> b)
src/Reflex/Patch/Class.hsdeleted−34
@@ -1,34 +0,0 @@
1−{-# LANGUAGE TypeFamilies #-}
2−-- | The interface for types which represent changes made to other types
3−module Reflex.Patch.Class where
4−
5−import Control.Monad.Identity
6−import Data.Maybe
7−import Data.Semigroup (Semigroup(..))
8−
9−-- | A 'Patch' type represents a kind of change made to a datastructure.
10−--
11−-- If an instance of 'Patch' is also an instance of 'Semigroup', it should obey
12−-- the law that @applyAlways (f <> g) == applyAlways f . applyAlways g@.
13−class Patch p where
14− type PatchTarget p :: *
15− -- | Apply the patch @p a@ to the value @a@. If no change is needed, return
16− -- 'Nothing'.
17− apply :: p -> PatchTarget p -> Maybe (PatchTarget p)
18−
19−-- | Apply a 'Patch'; if it does nothing, return the original value
20−applyAlways :: Patch p => p -> PatchTarget p -> PatchTarget p
21−applyAlways p t = fromMaybe t $ apply p t
22−
23−-- | 'Identity' can be used as a 'Patch' that always fully replaces the value
24−instance Patch (Identity a) where
25− type PatchTarget (Identity a) = a
26− apply (Identity a) _ = Just a
27−
28−-- | Like '(.)', but composes functions that return patches rather than
29−-- functions that return new values. The Semigroup instance for patches must
30−-- apply patches right-to-left, like '(.)'.
31−composePatchFunctions :: (Patch p, Semigroup p) => (PatchTarget p -> p) -> (PatchTarget p -> p) -> PatchTarget p -> p
32−composePatchFunctions g f a =
33− let fp = f a
34− in g (applyAlways fp a) <> fp
src/Reflex/Patch/DMap.hsdeleted−82
@@ -1,82 +0,0 @@
1−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
2−{-# LANGUAGE LambdaCase #-}
3−{-# LANGUAGE PolyKinds #-}
4−{-# LANGUAGE Rank2Types #-}
5−{-# LANGUAGE ScopedTypeVariables #-}
6−{-# LANGUAGE StandaloneDeriving #-}
7−{-# LANGUAGE TypeFamilies #-}
8−-- | 'Patch'es on 'DMap' that consist only of insertions (or overwrites) and deletions.
9−module Reflex.Patch.DMap where
10−
11−import Reflex.Patch.Class
12−import Reflex.Patch.IntMap
13−import Reflex.Patch.Map
14−
15−import Data.Dependent.Map (DMap, DSum (..), GCompare (..))
16−import qualified Data.Dependent.Map as DMap
17−import Data.Functor.Constant
18−import Data.Functor.Misc
19−import qualified Data.IntMap as IntMap
20−import qualified Data.Map as Map
21−import Data.Semigroup (Semigroup (..))
22−import Data.Some (Some)
23−
24−-- | A set of changes to a 'DMap'. Any element may be inserted/updated or deleted.
25−-- Insertions are represented as @'ComposeMaybe' (Just value)@,
26−-- while deletions are represented as @'ComposeMaybe' Nothing@.
27−newtype PatchDMap k v = PatchDMap { unPatchDMap :: DMap k (ComposeMaybe v) }
28−
29−deriving instance GCompare k => Semigroup (PatchDMap k v)
30−
31−deriving instance GCompare k => Monoid (PatchDMap k v)
32−
33−-- | Apply the insertions or deletions to a given 'DMap'.
34−instance GCompare k => Patch (PatchDMap k v) where
35− type PatchTarget (PatchDMap k v) = DMap k v
36− apply (PatchDMap diff) old = Just $! insertions `DMap.union` (old `DMap.difference` deletions) --TODO: return Nothing sometimes --Note: the strict application here is critical to ensuring that incremental merges don't hold onto all their prerequisite events forever; can we make this more robust?
37− where insertions = DMap.mapMaybeWithKey (const $ getComposeMaybe) diff
38− deletions = DMap.mapMaybeWithKey (const $ nothingToJust . getComposeMaybe) diff
39− nothingToJust = \case
40− Nothing -> Just $ Constant ()
41− Just _ -> Nothing
42−
43−-- | Map a function @v a -> v' a@ over any inserts/updates in the given
44−-- @'PatchDMap' k v@ to produce a @'PatchDMap' k v'@.
45−mapPatchDMap :: (forall a. v a -> v' a) -> PatchDMap k v -> PatchDMap k v'
46−mapPatchDMap f (PatchDMap p) = PatchDMap $ DMap.map (ComposeMaybe . fmap f . getComposeMaybe) p
47−
48−-- | Map an effectful function @v a -> f (v' a)@ over any inserts/updates in the given
49−-- @'PatchDMap' k v@ to produce a @'PatchDMap' k v'@.
50−traversePatchDMap :: Applicative f => (forall a. v a -> f (v' a)) -> PatchDMap k v -> f (PatchDMap k v')
51−traversePatchDMap f = traversePatchDMapWithKey $ const f
52−
53−-- | Map an effectful function @k a -> v a -> f (v' a)@ over any inserts/updates
54−-- in the given @'PatchDMap' k v@ to produce a @'PatchDMap' k v'@.
55−traversePatchDMapWithKey :: Applicative m => (forall a. k a -> v a -> m (v' a)) -> PatchDMap k v -> m (PatchDMap k v')
56−traversePatchDMapWithKey f (PatchDMap p) = PatchDMap <$> DMap.traverseWithKey (\k (ComposeMaybe v) -> ComposeMaybe <$> traverse (f k) v) p
57−
58−-- | Weaken a @'PatchDMap' k v@ to a @'PatchMap' (Some k) v'@ using a function
59−-- @v a -> v'@ to weaken each value contained in the patch.
60−weakenPatchDMapWith :: (forall a. v a -> v') -> PatchDMap k v -> PatchMap (Some k) v'
61−weakenPatchDMapWith f (PatchDMap p) = PatchMap $ weakenDMapWith (fmap f . getComposeMaybe) p
62−
63−-- | Convert a weak @'PatchDMap' ('Const2' k a) v@ where the @a@ is known by way of
64−-- the @Const2@ into a @'PatchMap' k v'@ using a rank 1 function @v a -> v'@.
65−patchDMapToPatchMapWith :: (v a -> v') -> PatchDMap (Const2 k a) v -> PatchMap k v'
66−patchDMapToPatchMapWith f (PatchDMap p) = PatchMap $ dmapToMapWith (fmap f . getComposeMaybe) p
67−
68−-- | Convert a @'PatchMap' k v@ into a @'PatchDMap' ('Const2' k a) v'@ using a function @v -> v' a@.
69−const2PatchDMapWith :: forall k v v' a. (v -> v' a) -> PatchMap k v -> PatchDMap (Const2 k a) v'
70−const2PatchDMapWith f (PatchMap p) = PatchDMap $ DMap.fromDistinctAscList $ g <$> Map.toAscList p
71− where g :: (k, Maybe v) -> DSum (Const2 k a) (ComposeMaybe v')
72− g (k, e) = Const2 k :=> ComposeMaybe (f <$> e)
73−
74−-- | Convert a @'PatchIntMap' v@ into a @'PatchDMap' ('Const2' Int a) v'@ using a function @v -> v' a@.
75−const2IntPatchDMapWith :: forall v f a. (v -> f a) -> PatchIntMap v -> PatchDMap (Const2 IntMap.Key a) f
76−const2IntPatchDMapWith f (PatchIntMap p) = PatchDMap $ DMap.fromDistinctAscList $ g <$> IntMap.toAscList p
77− where g :: (IntMap.Key, Maybe v) -> DSum (Const2 IntMap.Key a) (ComposeMaybe f)
78− g (k, e) = Const2 k :=> ComposeMaybe (f <$> e)
79−
80−-- | Get the values that will be replaced or deleted if the given patch is applied to the given 'DMap'.
81−getDeletions :: GCompare k => PatchDMap k v -> DMap k v' -> DMap k v'
82−getDeletions (PatchDMap p) m = DMap.intersectionWithKey (\_ v _ -> v) m p
src/Reflex/Patch/DMapWithMove.hsdeleted−363
@@ -1,363 +0,0 @@
1−{-# LANGUAGE CPP #-}
2−{-# LANGUAGE FlexibleContexts #-}
3−{-# LANGUAGE FlexibleInstances #-}
4−{-# LANGUAGE GADTs #-}
5−{-# LANGUAGE LambdaCase #-}
6−{-# LANGUAGE MultiParamTypeClasses #-}
7−{-# LANGUAGE PatternGuards #-}
8−{-# LANGUAGE PolyKinds #-}
9−{-# LANGUAGE Rank2Types #-}
10−{-# LANGUAGE ScopedTypeVariables #-}
11−{-# LANGUAGE TypeFamilies #-}
12−{-# LANGUAGE UndecidableInstances #-}
13−
14−-- |Module containing @'PatchDMapWithMove' k v@ and associated functions, which represents a 'Patch' to a @'DMap' k v@ which can insert, update, delete, and
15−-- move values between keys.
16−module Reflex.Patch.DMapWithMove where
17−
18−import Reflex.Patch.Class
19−import Reflex.Patch.MapWithMove (PatchMapWithMove (..))
20−import qualified Reflex.Patch.MapWithMove as MapWithMove
21−
22−import Data.Constraint.Extras
23−import Data.Dependent.Map (DMap, DSum (..), GCompare (..))
24−import qualified Data.Dependent.Map as DMap
25−import Data.Functor.Constant
26−import Data.Functor.Misc
27−import Data.Functor.Product
28−import Data.GADT.Compare (GEq (..))
29−import Data.GADT.Show (GShow, gshow)
30−import qualified Data.Map as Map
31−import Data.Maybe
32−import Data.Semigroup (Semigroup (..), (<>))
33−import Data.Some (Some(Some))
34−import Data.These
35−
36−-- | Like 'PatchMapWithMove', but for 'DMap'. Each key carries a 'NodeInfo' which describes how it will be changed by the patch and connects move sources and
37−-- destinations.
38−--
39−-- Invariants:
40−--
41−-- * A key should not move to itself.
42−-- * A move should always be represented with both the destination key (as a 'From_Move') and the source key (as a @'ComposeMaybe' ('Just' destination)@)
43−newtype PatchDMapWithMove k v = PatchDMapWithMove (DMap k (NodeInfo k v))
44−
45−-- |Structure which represents what changes apply to a particular key. @_nodeInfo_from@ specifies what happens to this key, and in particular what other key
46−-- the current key is moving from, while @_nodeInfo_to@ specifies what key the current key is moving to if involved in a move.
47−data NodeInfo k v a = NodeInfo
48− { _nodeInfo_from :: !(From k v a)
49− -- ^Change applying to the current key, be it an insert, move, or delete.
50− , _nodeInfo_to :: !(To k a)
51− -- ^Where this key is moving to, if involved in a move. Should only be @ComposeMaybe (Just k)@ when there is a corresponding 'From_Move'.
52− }
53− deriving (Show)
54−
55−-- |Structure describing a particular change to a key, be it inserting a new key (@From_Insert@), updating an existing key (@From_Insert@ again), deleting a
56−-- key (@From_Delete@), or moving a key (@From_Move@).
57−data From (k :: a -> *) (v :: a -> *) :: a -> * where
58− -- |Insert a new or update an existing key with the given value @v a@
59− From_Insert :: v a -> From k v a
60− -- |Delete the existing key
61− From_Delete :: From k v a
62− -- |Move the value from the given key @k a@ to this key. The source key should also have an entry in the patch giving the current key as @_nodeInfo_to@,
63− -- usually but not necessarily with @From_Delete@.
64− From_Move :: !(k a) -> From k v a
65− deriving (Show, Read, Eq, Ord)
66−
67−-- |Type alias for the "to" part of a 'NodeInfo'. @'ComposeMaybe' ('Just' k)@ means the key is moving to another key, @ComposeMaybe Nothing@ for any other
68−-- operation.
69−type To = ComposeMaybe
70−
71−-- |Test whether a 'PatchDMapWithMove' satisfies its invariants.
72−validPatchDMapWithMove :: forall k v. (GCompare k, GShow k) => DMap k (NodeInfo k v) -> Bool
73−validPatchDMapWithMove = not . null . validationErrorsForPatchDMapWithMove
74−
75−-- |Enumerate what reasons a 'PatchDMapWithMove' doesn't satisfy its invariants, returning @[]@ if it's valid.
76−validationErrorsForPatchDMapWithMove :: forall k v. (GCompare k, GShow k) => DMap k (NodeInfo k v) -> [String]
77−validationErrorsForPatchDMapWithMove m =
78− noSelfMoves <> movesBalanced
79− where
80− noSelfMoves = mapMaybe selfMove . DMap.toAscList $ m
81− selfMove (dst :=> NodeInfo (From_Move src) _) | Just _ <- dst `geq` src = Just $ "self move of key " <> gshow src <> " at destination side"
82− selfMove (src :=> NodeInfo _ (ComposeMaybe (Just dst))) | Just _ <- src `geq` dst = Just $ "self move of key " <> gshow dst <> " at source side"
83− selfMove _ = Nothing
84− movesBalanced = mapMaybe unbalancedMove . DMap.toAscList $ m
85− unbalancedMove (dst :=> NodeInfo (From_Move src) _) =
86− case DMap.lookup src m of
87− Nothing -> Just $ "unbalanced move at destination key " <> gshow dst <> " supposedly from " <> gshow src <> " but source key is not in the patch"
88− Just (NodeInfo _ (ComposeMaybe (Just dst'))) ->
89− if isNothing (dst' `geq` dst)
90− then Just $ "unbalanced move at destination key " <> gshow dst <> " from " <> gshow src <> " is going to " <> gshow dst' <> " instead"
91− else Nothing
92− _ ->
93− Just $ "unbalanced move at destination key " <> gshow dst <> " supposedly from " <> gshow src <> " but source key has no move to key"
94− unbalancedMove (src :=> NodeInfo _ (ComposeMaybe (Just dst))) =
95− case DMap.lookup dst m of
96− Nothing -> Just $ " unbalanced move at source key " <> gshow src <> " supposedly going to " <> gshow dst <> " but destination key is not in the patch"
97− Just (NodeInfo (From_Move src') _) ->
98− if isNothing (src' `geq` src)
99− then Just $ "unbalanced move at source key " <> gshow src <> " to " <> gshow dst <> " is coming from " <> gshow src' <> " instead"
100− else Nothing
101−
102− _ ->
103− Just $ "unbalanced move at source key " <> gshow src <> " supposedly going to " <> gshow dst <> " but destination key is not moving"
104− unbalancedMove _ = Nothing
105−
106−-- |Test whether two @'PatchDMapWithMove' k v@ contain the same patch operations.
107−instance (GEq k, Has' Eq k (NodeInfo k v)) => Eq (PatchDMapWithMove k v) where
108− PatchDMapWithMove a == PatchDMapWithMove b = a == b
109−
110−-- |Higher kinded 2-tuple, identical to @Data.Functor.Product@ from base ≥ 4.9
111−data Pair1 f g a = Pair1 (f a) (g a)
112−
113−-- |Helper data structure used for composing patches using the monoid instance.
114−data Fixup k v a
115− = Fixup_Delete
116− | Fixup_Update (These (From k v a) (To k a))
117−
118−-- |Compose patches having the same effect as applying the patches in turn: @'applyAlways' (p <> q) == 'applyAlways' p . 'applyAlways' q@
119−instance GCompare k => Semigroup (PatchDMapWithMove k v) where
120− PatchDMapWithMove ma <> PatchDMapWithMove mb = PatchDMapWithMove m
121− where
122− connections = DMap.toList $ DMap.intersectionWithKey (\_ a b -> Pair1 (_nodeInfo_to a) (_nodeInfo_from b)) ma mb
123− h :: DSum k (Pair1 (ComposeMaybe k) (From k v)) -> [DSum k (Fixup k v)]
124− h (_ :=> Pair1 (ComposeMaybe mToAfter) editBefore) = case (mToAfter, editBefore) of
125− (Just toAfter, From_Move fromBefore)
126− | isJust $ fromBefore `geq` toAfter
127− -> [toAfter :=> Fixup_Delete]
128− | otherwise
129− -> [ toAfter :=> Fixup_Update (This editBefore)
130− , fromBefore :=> Fixup_Update (That (ComposeMaybe mToAfter))
131− ]
132− (Nothing, From_Move fromBefore) -> [fromBefore :=> Fixup_Update (That (ComposeMaybe mToAfter))] -- The item is destroyed in the second patch, so indicate that it is destroyed in the source map
133− (Just toAfter, _) -> [toAfter :=> Fixup_Update (This editBefore)]
134− (Nothing, _) -> []
135− mergeFixups _ Fixup_Delete Fixup_Delete = Fixup_Delete
136− mergeFixups _ (Fixup_Update a) (Fixup_Update b)
137− | This x <- a, That y <- b
138− = Fixup_Update $ These x y
139− | That y <- a, This x <- b
140− = Fixup_Update $ These x y
141− mergeFixups _ _ _ = error "PatchDMapWithMove: incompatible fixups"
142− fixups = DMap.fromListWithKey mergeFixups $ concatMap h connections
143− combineNodeInfos _ nia nib = NodeInfo
144− { _nodeInfo_from = _nodeInfo_from nia
145− , _nodeInfo_to = _nodeInfo_to nib
146− }
147− applyFixup _ ni = \case
148− Fixup_Delete -> Nothing
149− Fixup_Update u -> Just $ NodeInfo
150− { _nodeInfo_from = fromMaybe (_nodeInfo_from ni) $ getHere u
151− , _nodeInfo_to = fromMaybe (_nodeInfo_to ni) $ getThere u
152− }
153− m = DMap.differenceWithKey applyFixup (DMap.unionWithKey combineNodeInfos ma mb) fixups
154− getHere :: These a b -> Maybe a
155− getHere = \case
156− This a -> Just a
157− These a _ -> Just a
158− That _ -> Nothing
159− getThere :: These a b -> Maybe b
160− getThere = \case
161− This _ -> Nothing
162− These _ b -> Just b
163− That b -> Just b
164−
165−-- |Compose patches having the same effect as applying the patches in turn: @'applyAlways' (p <> q) == 'applyAlways' p . 'applyAlways' q@
166−instance GCompare k => Monoid (PatchDMapWithMove k v) where
167− mempty = PatchDMapWithMove mempty
168− mappend = (<>)
169−
170−{-
171−mappendPatchDMapWithMoveSlow :: forall k v. (ShowTag k v, GCompare k) => PatchDMapWithMove k v -> PatchDMapWithMove k v -> PatchDMapWithMove k v
172−PatchDMapWithMove dstAfter srcAfter `mappendPatchDMapWithMoveSlow` PatchDMapWithMove dstBefore srcBefore = PatchDMapWithMove dst src
173− where
174− getDstAction k m = fromMaybe (From_Move k) $ DMap.lookup k m -- Any key that isn't present is treated as that key moving to itself
175− removeRedundantDst toKey (From_Move fromKey) | isJust (toKey `geq` fromKey) = Nothing
176− removeRedundantDst _ a = Just a
177− f :: forall a. k a -> From k v a -> Maybe (From k v a)
178− f toKey _ = removeRedundantDst toKey $ case getDstAction toKey dstAfter of
179− From_Move fromKey -> getDstAction fromKey dstBefore
180− nonMove -> nonMove
181− dst = DMap.mapMaybeWithKey f $ DMap.union dstAfter dstBefore
182− getSrcAction k m = fromMaybe (ComposeMaybe $ Just k) $ DMap.lookup k m
183− removeRedundantSrc fromKey (ComposeMaybe (Just toKey)) | isJust (fromKey `geq` toKey) = Nothing
184− removeRedundantSrc _ a = Just a
185− g :: forall a. k a -> ComposeMaybe k a -> Maybe (ComposeMaybe k a)
186− g fromKey _ = removeRedundantSrc fromKey $ case getSrcAction fromKey srcBefore of
187− ComposeMaybe Nothing -> ComposeMaybe Nothing
188− ComposeMaybe (Just toKeyBefore) -> getSrcAction toKeyBefore srcAfter
189− src = DMap.mapMaybeWithKey g $ DMap.union srcAfter srcBefore
190−-}
191−
192−-- |Make a @'PatchDMapWithMove' k v@ which has the effect of inserting or updating a value @v a@ to the given key @k a@, like 'DMap.insert'.
193−insertDMapKey :: k a -> v a -> PatchDMapWithMove k v
194−insertDMapKey k v =
195− PatchDMapWithMove . DMap.singleton k $ NodeInfo (From_Insert v) (ComposeMaybe Nothing)
196−
197−-- |Make a @'PatchDMapWithMove' k v@ which has the effect of moving the value from the first key @k a@ to the second key @k a@, equivalent to:
198−--
199−-- @
200−-- 'DMap.delete' src (maybe dmap ('DMap.insert' dst) (DMap.lookup src dmap))
201−-- @
202−moveDMapKey :: GCompare k => k a -> k a -> PatchDMapWithMove k v
203−moveDMapKey src dst = case src `geq` dst of
204− Nothing -> PatchDMapWithMove $ DMap.fromList
205− [ dst :=> NodeInfo (From_Move src) (ComposeMaybe Nothing)
206− , src :=> NodeInfo From_Delete (ComposeMaybe $ Just dst)
207− ]
208− Just _ -> mempty
209−
210−-- |Make a @'PatchDMapWithMove' k v@ which has the effect of swapping two keys in the mapping, equivalent to:
211−--
212−-- @
213−-- let aMay = DMap.lookup a dmap
214−-- bMay = DMap.lookup b dmap
215−-- in maybe id (DMap.insert a) (bMay `mplus` aMay)
216−-- . maybe id (DMap.insert b) (aMay `mplus` bMay)
217−-- . DMap.delete a . DMap.delete b $ dmap
218−-- @
219−swapDMapKey :: GCompare k => k a -> k a -> PatchDMapWithMove k v
220−swapDMapKey src dst = case src `geq` dst of
221− Nothing -> PatchDMapWithMove $ DMap.fromList
222− [ dst :=> NodeInfo (From_Move src) (ComposeMaybe $ Just src)
223− , src :=> NodeInfo (From_Move dst) (ComposeMaybe $ Just dst)
224− ]
225− Just _ -> mempty
226−
227−-- |Make a @'PatchDMapWithMove' k v@ which has the effect of deleting a key in the mapping, equivalent to 'DMap.delete'.
228−deleteDMapKey :: k a -> PatchDMapWithMove k v
229−deleteDMapKey k = PatchDMapWithMove $ DMap.singleton k $ NodeInfo From_Delete $ ComposeMaybe Nothing
230−
231−{-
232−k1, k2 :: Const2 Int () ()
233−k1 = Const2 1
234−k2 = Const2 2
235−p1, p2 :: PatchDMapWithMove (Const2 Int ()) Identity
236−p1 = moveDMapKey k1 k2
237−p2 = moveDMapKey k2 k1
238−p12 = p1 <> p2
239−p21 = p2 <> p1
240−p12Slow = p1 `mappendPatchDMapWithMoveSlow` p2
241−p21Slow = p2 `mappendPatchDMapWithMoveSlow` p1
242−
243−testPatchDMapWithMove = do
244− print p1
245− print p2
246− print $ p12 == deleteDMapKey k1
247− print $ p21 == deleteDMapKey k2
248− print $ p12Slow == deleteDMapKey k1
249− print $ p21Slow == deleteDMapKey k2
250−
251−dst (PatchDMapWithMove x _) = x
252−src (PatchDMapWithMove _ x) = x
253−-}
254−
255−-- |Extract the 'DMap' representing the patch changes from the 'PatchDMapWithMove'.
256−unPatchDMapWithMove :: PatchDMapWithMove k v -> DMap k (NodeInfo k v)
257−unPatchDMapWithMove (PatchDMapWithMove p) = p
258−
259−-- |Wrap a 'DMap' representing patch changes into a 'PatchDMapWithMove', without checking any invariants.
260−--
261−-- __Warning:__ when using this function, you must ensure that the invariants of 'PatchDMapWithMove' are preserved; they will not be checked.
262−unsafePatchDMapWithMove :: DMap k (NodeInfo k v) -> PatchDMapWithMove k v
263−unsafePatchDMapWithMove = PatchDMapWithMove
264−
265−-- |Wrap a 'DMap' representing patch changes into a 'PatchDMapWithMove' while checking invariants. If the invariants are satisfied, @Right p@ is returned
266−-- otherwise @Left errors@.
267−patchDMapWithMove :: (GCompare k, GShow k) => DMap k (NodeInfo k v) -> Either [String] (PatchDMapWithMove k v)
268−patchDMapWithMove dm =
269− case validationErrorsForPatchDMapWithMove dm of
270− [] -> Right $ unsafePatchDMapWithMove dm
271− errs -> Left errs
272−
273−-- |Map a natural transform @v -> v'@ over the given patch, transforming @'PatchDMapWithMove' k v@ into @'PatchDMapWithMove' k v'@.
274−mapPatchDMapWithMove :: forall k v v'. (forall a. v a -> v' a) -> PatchDMapWithMove k v -> PatchDMapWithMove k v'
275−mapPatchDMapWithMove f (PatchDMapWithMove p) = PatchDMapWithMove $
276− DMap.map (\ni -> ni { _nodeInfo_from = g $ _nodeInfo_from ni }) p
277− where g :: forall a. From k v a -> From k v' a
278− g = \case
279− From_Insert v -> From_Insert $ f v
280− From_Delete -> From_Delete
281− From_Move k -> From_Move k
282−
283−-- |Traverse an effectful function @forall a. v a -> m (v ' a)@ over the given patch, transforming @'PatchDMapWithMove' k v@ into @m ('PatchDMapWithMove' k v')@.
284−traversePatchDMapWithMove :: forall m k v v'. Applicative m => (forall a. v a -> m (v' a)) -> PatchDMapWithMove k v -> m (PatchDMapWithMove k v')
285−traversePatchDMapWithMove f = traversePatchDMapWithMoveWithKey $ const f
286−
287−-- |Map an effectful function @forall a. k a -> v a -> m (v ' a)@ over the given patch, transforming @'PatchDMapWithMove' k v@ into @m ('PatchDMapWithMove' k v')@.
288−traversePatchDMapWithMoveWithKey :: forall m k v v'. Applicative m => (forall a. k a -> v a -> m (v' a)) -> PatchDMapWithMove k v -> m (PatchDMapWithMove k v')
289−traversePatchDMapWithMoveWithKey f (PatchDMapWithMove p) = PatchDMapWithMove <$> DMap.traverseWithKey (nodeInfoMapFromM . g) p
290− where g :: forall a. k a -> From k v a -> m (From k v' a)
291− g k = \case
292− From_Insert v -> From_Insert <$> f k v
293− From_Delete -> pure From_Delete
294− From_Move fromKey -> pure $ From_Move fromKey
295−
296−-- |Map a function which transforms @'From' k v a@ into a @'From' k v' a@ over a @'NodeInfo' k v a@.
297−nodeInfoMapFrom :: (From k v a -> From k v' a) -> NodeInfo k v a -> NodeInfo k v' a
298−nodeInfoMapFrom f ni = ni { _nodeInfo_from = f $ _nodeInfo_from ni }
299−
300−-- |Map an effectful function which transforms @'From' k v a@ into a @f ('From' k v' a)@ over a @'NodeInfo' k v a@.
301−nodeInfoMapFromM :: Functor f => (From k v a -> f (From k v' a)) -> NodeInfo k v a -> f (NodeInfo k v' a)
302−nodeInfoMapFromM f ni = fmap (\result -> ni { _nodeInfo_from = result }) $ f $ _nodeInfo_from ni
303−
304−-- |Weaken a 'PatchDMapWithMove' to a 'PatchMapWithMove' by weakening the keys from @k a@ to @'Some' k@ and applying a given weakening function @v a -> v'@ to
305−-- values.
306−weakenPatchDMapWithMoveWith :: forall k v v'. (forall a. v a -> v') -> PatchDMapWithMove k v -> PatchMapWithMove (Some k) v'
307−weakenPatchDMapWithMoveWith f (PatchDMapWithMove p) = PatchMapWithMove $ weakenDMapWith g p
308− where g :: forall a. NodeInfo k v a -> MapWithMove.NodeInfo (Some k) v'
309− g ni = MapWithMove.NodeInfo
310− { MapWithMove._nodeInfo_from = case _nodeInfo_from ni of
311− From_Insert v -> MapWithMove.From_Insert $ f v
312− From_Delete -> MapWithMove.From_Delete
313− From_Move k -> MapWithMove.From_Move $ Some k
314− , MapWithMove._nodeInfo_to = Some <$> getComposeMaybe (_nodeInfo_to ni)
315− }
316−
317−-- |"Weaken" a @'PatchDMapWithMove' (Const2 k a) v@ to a @'PatchMapWithMove' k v'@. Weaken is in scare quotes because the 'Const2' has already disabled any
318−-- dependency in the typing and all points are already @a@, hence the function to map each value to @v'@ is not higher rank.
319−patchDMapWithMoveToPatchMapWithMoveWith :: forall k v v' a. (v a -> v') -> PatchDMapWithMove (Const2 k a) v -> PatchMapWithMove k v'
320−patchDMapWithMoveToPatchMapWithMoveWith f (PatchDMapWithMove p) = PatchMapWithMove $ dmapToMapWith g p
321− where g :: NodeInfo (Const2 k a) v a -> MapWithMove.NodeInfo k v'
322− g ni = MapWithMove.NodeInfo
323− { MapWithMove._nodeInfo_from = case _nodeInfo_from ni of
324− From_Insert v -> MapWithMove.From_Insert $ f v
325− From_Delete -> MapWithMove.From_Delete
326− From_Move (Const2 k) -> MapWithMove.From_Move k
327− , MapWithMove._nodeInfo_to = unConst2 <$> getComposeMaybe (_nodeInfo_to ni)
328− }
329−
330−-- |"Strengthen" a @'PatchMapWithMove' k v@ into a @'PatchDMapWithMove ('Const2' k a)@; that is, turn a non-dependently-typed patch into a dependently typed
331−-- one but which always has a constant key type represented by 'Const2'. Apply the given function to each @v@ to produce a @v' a@.
332−-- Completemented by 'patchDMapWithMoveToPatchMapWithMoveWith'
333−const2PatchDMapWithMoveWith :: forall k v v' a. (v -> v' a) -> PatchMapWithMove k v -> PatchDMapWithMove (Const2 k a) v'
334−const2PatchDMapWithMoveWith f (PatchMapWithMove p) = PatchDMapWithMove $ DMap.fromDistinctAscList $ g <$> Map.toAscList p
335− where g :: (k, MapWithMove.NodeInfo k v) -> DSum (Const2 k a) (NodeInfo (Const2 k a) v')
336− g (k, ni) = Const2 k :=> NodeInfo
337− { _nodeInfo_from = case MapWithMove._nodeInfo_from ni of
338− MapWithMove.From_Insert v -> From_Insert $ f v
339− MapWithMove.From_Delete -> From_Delete
340− MapWithMove.From_Move fromKey -> From_Move $ Const2 fromKey
341− , _nodeInfo_to = ComposeMaybe $ Const2 <$> MapWithMove._nodeInfo_to ni
342− }
343−
344−-- | Apply the insertions, deletions, and moves to a given 'DMap'.
345−instance GCompare k => Patch (PatchDMapWithMove k v) where
346− type PatchTarget (PatchDMapWithMove k v) = DMap k v
347− apply (PatchDMapWithMove p) old = Just $! insertions `DMap.union` (old `DMap.difference` deletions) --TODO: return Nothing sometimes --Note: the strict application here is critical to ensuring that incremental merges don't hold onto all their prerequisite events forever; can we make this more robust?
348− where insertions = DMap.mapMaybeWithKey insertFunc p
349− insertFunc :: forall a. k a -> NodeInfo k v a -> Maybe (v a)
350− insertFunc _ ni = case _nodeInfo_from ni of
351− From_Insert v -> Just v
352− From_Move k -> DMap.lookup k old
353− From_Delete -> Nothing
354− deletions = DMap.mapMaybeWithKey deleteFunc p
355− deleteFunc :: forall a. k a -> NodeInfo k v a -> Maybe (Constant () a)
356− deleteFunc _ ni = case _nodeInfo_from ni of
357− From_Delete -> Just $ Constant ()
358− _ -> Nothing
359−
360−-- | Get the values that will be replaced, deleted, or moved if the given patch is applied to the given 'DMap'.
361−getDeletionsAndMoves :: GCompare k => PatchDMapWithMove k v -> DMap k v' -> DMap k (Product v' (ComposeMaybe k))
362−getDeletionsAndMoves (PatchDMapWithMove p) m = DMap.intersectionWithKey f m p
363− where f _ v ni = Pair v $ _nodeInfo_to ni
src/Reflex/Patch/IntMap.hsdeleted−59
@@ -1,59 +0,0 @@
1−{-# LANGUAGE DeriveFoldable #-}
2−{-# LANGUAGE DeriveFunctor #-}
3−{-# LANGUAGE DeriveTraversable #-}
4−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
5−{-# LANGUAGE TypeFamilies #-}
6−-- | Module containing 'PatchIntMap', a 'Patch' for 'IntMap' which allows for
7−-- insert/update or delete of associations.
8−module Reflex.Patch.IntMap where
9−
10−import Data.IntMap.Strict (IntMap)
11−import qualified Data.IntMap.Strict as IntMap
12−import Data.Maybe
13−import Data.Semigroup
14−import Reflex.Patch.Class
15−
16−-- | 'Patch' for 'IntMap' which represents insertion or deletion of keys in the mapping.
17−-- Internally represented by 'IntMap (Maybe a)', where @Just@ means insert/update
18−-- and @Nothing@ means delete.
19−newtype PatchIntMap a = PatchIntMap (IntMap (Maybe a)) deriving (Functor, Foldable, Traversable, Monoid)
20−
21−-- | Apply the insertions or deletions to a given 'IntMap'.
22−instance Patch (PatchIntMap a) where
23− type PatchTarget (PatchIntMap a) = IntMap a
24− apply (PatchIntMap p) v = if IntMap.null p then Nothing else Just $
25− let removes = IntMap.filter isNothing p
26− adds = IntMap.mapMaybe id p
27− in IntMap.union adds $ v `IntMap.difference` removes
28−
29−-- | @a <> b@ will apply the changes of @b@ and then apply the changes of @a@.
30−-- If the same key is modified by both patches, the one on the left will take
31−-- precedence.
32−instance Semigroup (PatchIntMap v) where
33− PatchIntMap a <> PatchIntMap b = PatchIntMap $ a `mappend` b --TODO: Add a semigroup instance for Map
34− -- PatchMap is idempotent, so stimes n is id for every n
35− stimes = stimesIdempotentMonoid
36−
37−-- | Map a function @Int -> a -> b@ over all @a@s in the given @'PatchIntMap' a@
38−-- (that is, all inserts/updates), producing a @PatchIntMap b@.
39−mapIntMapPatchWithKey :: (Int -> a -> b) -> PatchIntMap a -> PatchIntMap b
40−mapIntMapPatchWithKey f (PatchIntMap m) = PatchIntMap $ IntMap.mapWithKey (\ k mv -> f k <$> mv) m
41−
42−-- | Map an effectful function @Int -> a -> f b@ over all @a@s in the given @'PatchIntMap' a@
43−-- (that is, all inserts/updates), producing a @f (PatchIntMap b)@.
44−traverseIntMapPatchWithKey :: Applicative f => (Int -> a -> f b) -> PatchIntMap a -> f (PatchIntMap b)
45−traverseIntMapPatchWithKey f (PatchIntMap m) = PatchIntMap <$> IntMap.traverseWithKey (\k mv -> traverse (f k) mv) m
46−
47−-- | Extract all @a@s inserted/updated by the given @'PatchIntMap' a@.
48−patchIntMapNewElements :: PatchIntMap a -> [a]
49−patchIntMapNewElements (PatchIntMap m) = catMaybes $ IntMap.elems m
50−
51−-- | Convert the given @'PatchIntMap' a@ into an @'IntMap' a@ with all
52−-- the inserts/updates in the given patch.
53−patchIntMapNewElementsMap :: PatchIntMap a -> IntMap a
54−patchIntMapNewElementsMap (PatchIntMap m) = IntMap.mapMaybe id m
55−
56−-- | Subset the given @'IntMap' a@ to contain only the keys that would be
57−-- deleted by the given @'PatchIntMap' a@.
58−getDeletions :: PatchIntMap v -> IntMap v' -> IntMap v'
59−getDeletions (PatchIntMap m) v = IntMap.intersection v m
src/Reflex/Patch/Map.hsdeleted−55
@@ -1,55 +0,0 @@
1−{-# LANGUAGE LambdaCase #-}
2−{-# LANGUAGE TypeFamilies #-}
3−-- | 'Patch'es on 'Map' that consist only of insertions (including overwrites)
4−-- and deletions
5−module Reflex.Patch.Map where
6−
7−import Reflex.Patch.Class
8−
9−import Data.Map (Map)
10−import qualified Data.Map as Map
11−import Data.Maybe
12−import Data.Semigroup
13−
14−-- | A set of changes to a 'Map'. Any element may be inserted/updated or
15−-- deleted. Insertions are represented as values wrapped in 'Just', while
16−-- deletions are represented as 'Nothing's
17−newtype PatchMap k v = PatchMap { unPatchMap :: Map k (Maybe v) }
18− deriving (Show, Read, Eq, Ord)
19−
20−-- | Apply the insertions or deletions to a given 'Map'.
21−instance Ord k => Patch (PatchMap k v) where
22− type PatchTarget (PatchMap k v) = Map k v
23− {-# INLINABLE apply #-}
24− apply (PatchMap p) old = Just $! insertions `Map.union` (old `Map.difference` deletions) --TODO: return Nothing sometimes --Note: the strict application here is critical to ensuring that incremental merges don't hold onto all their prerequisite events forever; can we make this more robust?
25− where insertions = Map.mapMaybeWithKey (const id) p
26− deletions = Map.mapMaybeWithKey (const nothingToJust) p
27− nothingToJust = \case
28− Nothing -> Just ()
29− Just _ -> Nothing
30−
31−-- | @a <> b@ will apply the changes of @b@ and then apply the changes of @a@.
32−-- If the same key is modified by both patches, the one on the left will take
33−-- precedence.
34−instance Ord k => Semigroup (PatchMap k v) where
35− PatchMap a <> PatchMap b = PatchMap $ a `mappend` b --TODO: Add a semigroup instance for Map
36− -- PatchMap is idempotent, so stimes n is id for every n
37− stimes = stimesIdempotentMonoid
38−
39−-- | The empty 'PatchMap' contains no insertions or deletions
40−instance Ord k => Monoid (PatchMap k v) where
41− mempty = PatchMap mempty
42− mappend = (<>)
43−
44−-- | 'fmap'ping a 'PatchMap' will alter all of the values it will insert.
45−-- Deletions are unaffected.
46−instance Functor (PatchMap k) where
47− fmap f = PatchMap . fmap (fmap f) . unPatchMap
48−
49−-- | Returns all the new elements that will be added to the 'Map'
50−patchMapNewElements :: PatchMap k v -> [v]
51−patchMapNewElements (PatchMap p) = catMaybes $ Map.elems p
52−
53−-- | Returns all the new elements that will be added to the 'Map'
54−patchMapNewElementsMap :: PatchMap k v -> Map k v
55−patchMapNewElementsMap (PatchMap p) = Map.mapMaybe id p
src/Reflex/Patch/MapWithMove.hsdeleted−270
@@ -1,270 +0,0 @@
1−{-# LANGUAGE DeriveFoldable #-}
2−{-# LANGUAGE DeriveFunctor #-}
3−{-# LANGUAGE DeriveTraversable #-}
4−{-# LANGUAGE FlexibleContexts #-}
5−{-# LANGUAGE LambdaCase #-}
6−{-# LANGUAGE PatternGuards #-}
7−{-# LANGUAGE ScopedTypeVariables #-}
8−{-# LANGUAGE TypeFamilies #-}
9−-- | 'Patch'es on 'Map' that can insert, delete, and move values from one key to
10−-- another
11−module Reflex.Patch.MapWithMove where
12−
13−import Reflex.Patch.Class
14−
15−import Control.Arrow
16−import Control.Monad.State
17−import Data.Foldable
18−import Data.Function
19−import Data.List
20−import Data.Map (Map)
21−import qualified Data.Map as Map
22−import Data.Maybe
23−import Data.Semigroup (Semigroup (..), (<>))
24−import qualified Data.Set as Set
25−import Data.These (These(..))
26−import Data.Tuple
27−
28−-- | Patch a DMap with additions, deletions, and moves. Invariant: If key @k1@
29−-- is coming from @From_Move k2@, then key @k2@ should be going to @Just k1@,
30−-- and vice versa. There should never be any unpaired From/To keys.
31−newtype PatchMapWithMove k v = PatchMapWithMove (Map k (NodeInfo k v)) deriving (Show, Eq, Ord, Functor, Foldable, Traversable)
32−
33−-- | Holds the information about each key: where its new value should come from,
34−-- and where its old value should go to
35−data NodeInfo k v = NodeInfo
36− { _nodeInfo_from :: !(From k v)
37− -- ^ Where do we get the new value for this key?
38− , _nodeInfo_to :: !(To k)
39− -- ^ If the old value is being kept (i.e. moved rather than deleted or
40− -- replaced), where is it going?
41− }
42− deriving (Show, Read, Eq, Ord, Functor, Foldable, Traversable)
43−
44−-- | Describe how a key's new value should be produced
45−data From k v
46− = From_Insert v -- ^ Insert the given value here
47− | From_Delete -- ^ Delete the existing value, if any, from here
48− | From_Move !k -- ^ Move the value here from the given key
49− deriving (Show, Read, Eq, Ord, Functor, Foldable, Traversable)
50−
51−-- | Describe where a key's old value will go. If this is 'Just', that means
52−-- the key's old value will be moved to the given other key; if it is 'Nothing',
53−-- that means it will be deleted.
54−type To = Maybe
55−
56−-- | Create a 'PatchMapWithMove', validating it
57−patchMapWithMove :: Ord k => Map k (NodeInfo k v) -> Maybe (PatchMapWithMove k v)
58−patchMapWithMove m = if valid then Just $ PatchMapWithMove m else Nothing
59− where valid = forwardLinks == backwardLinks
60− forwardLinks = Map.mapMaybe _nodeInfo_to m
61− backwardLinks = Map.fromList $ catMaybes $ flip fmap (Map.toList m) $ \(to, v) ->
62− case _nodeInfo_from v of
63− From_Move from -> Just (from, to)
64− _ -> Nothing
65−
66−-- | Create a 'PatchMapWithMove' that inserts everything in the given 'Map'
67−patchMapWithMoveInsertAll :: Map k v -> PatchMapWithMove k v
68−patchMapWithMoveInsertAll m = PatchMapWithMove $ flip fmap m $ \v -> NodeInfo
69− { _nodeInfo_from = From_Insert v
70− , _nodeInfo_to = Nothing
71− }
72−
73−-- | Extract the internal representation of the 'PatchMapWithMove'
74−unPatchMapWithMove :: PatchMapWithMove k v -> Map k (NodeInfo k v)
75−unPatchMapWithMove (PatchMapWithMove p) = p
76−
77−-- | Make a @'PatchMapWithMove' k v@ which has the effect of inserting or updating a value @v@ to the given key @k@, like 'Map.insert'.
78−insertMapKey :: k -> v -> PatchMapWithMove k v
79−insertMapKey k v = PatchMapWithMove . Map.singleton k $ NodeInfo (From_Insert v) Nothing
80−
81−-- |Make a @'PatchMapWithMove' k v@ which has the effect of moving the value from the first key @k@ to the second key @k@, equivalent to:
82−--
83−-- @
84−-- 'Map.delete' src (maybe map ('Map.insert' dst) (Map.lookup src map))
85−-- @
86−moveMapKey :: Ord k => k -> k -> PatchMapWithMove k v
87−moveMapKey src dst
88− | src == dst = mempty
89− | otherwise =
90− PatchMapWithMove $ Map.fromList
91− [ (dst, NodeInfo (From_Move src) Nothing)
92− , (src, NodeInfo From_Delete (Just dst))
93− ]
94−
95−-- |Make a @'PatchMapWithMove' k v@ which has the effect of swapping two keys in the mapping, equivalent to:
96−--
97−-- @
98−-- let aMay = Map.lookup a map
99−-- bMay = Map.lookup b map
100−-- in maybe id (Map.insert a) (bMay `mplus` aMay)
101−-- . maybe id (Map.insert b) (aMay `mplus` bMay)
102−-- . Map.delete a . Map.delete b $ map
103−-- @
104−swapMapKey :: Ord k => k -> k -> PatchMapWithMove k v
105−swapMapKey src dst
106− | src == dst = mempty
107− | otherwise =
108− PatchMapWithMove $ Map.fromList
109− [ (dst, NodeInfo (From_Move src) (Just src))
110− , (src, NodeInfo (From_Move dst) (Just dst))
111− ]
112−
113−-- |Make a @'PatchMapWithMove' k v@ which has the effect of deleting a key in the mapping, equivalent to 'Map.delete'.
114−deleteMapKey :: k -> PatchMapWithMove k v
115−deleteMapKey k = PatchMapWithMove . Map.singleton k $ NodeInfo From_Delete Nothing
116−
117−-- | Wrap a @'Map' k (NodeInfo k v)@ representing patch changes into a @'PatchMapWithMove' k v@, without checking any invariants.
118−--
119−-- __Warning:__ when using this function, you must ensure that the invariants of 'PatchMapWithMove' are preserved; they will not be checked.
120−unsafePatchMapWithMove :: Map k (NodeInfo k v) -> PatchMapWithMove k v
121−unsafePatchMapWithMove = PatchMapWithMove
122−
123−-- | Apply the insertions, deletions, and moves to a given 'Map'
124−instance Ord k => Patch (PatchMapWithMove k v) where
125− type PatchTarget (PatchMapWithMove k v) = Map k v
126− apply (PatchMapWithMove p) old = Just $! insertions `Map.union` (old `Map.difference` deletions) --TODO: return Nothing sometimes --Note: the strict application here is critical to ensuring that incremental merges don't hold onto all their prerequisite events forever; can we make this more robust?
127− where insertions = flip Map.mapMaybeWithKey p $ \_ ni -> case _nodeInfo_from ni of
128− From_Insert v -> Just v
129− From_Move k -> Map.lookup k old
130− From_Delete -> Nothing
131− deletions = flip Map.mapMaybeWithKey p $ \_ ni -> case _nodeInfo_from ni of
132− From_Delete -> Just ()
133− _ -> Nothing
134−
135−-- | Returns all the new elements that will be added to the 'Map'.
136−patchMapWithMoveNewElements :: PatchMapWithMove k v -> [v]
137−patchMapWithMoveNewElements = Map.elems . patchMapWithMoveNewElementsMap
138−
139−-- | Return a @'Map' k v@ with all the inserts/updates from the given @'PatchMapWithMove' k v@.
140−patchMapWithMoveNewElementsMap :: PatchMapWithMove k v -> Map k v
141−patchMapWithMoveNewElementsMap (PatchMapWithMove p) = Map.mapMaybe f p
142− where f ni = case _nodeInfo_from ni of
143− From_Insert v -> Just v
144− From_Move _ -> Nothing
145− From_Delete -> Nothing
146−
147−-- | Create a 'PatchMapWithMove' that, if applied to the given 'Map', will sort
148−-- its values using the given ordering function. The set keys of the 'Map' is
149−-- not changed.
150−patchThatSortsMapWith :: Ord k => (v -> v -> Ordering) -> Map k v -> PatchMapWithMove k v
151−patchThatSortsMapWith cmp m = PatchMapWithMove $ Map.fromList $ catMaybes $ zipWith g unsorted sorted
152− where unsorted = Map.toList m
153− sorted = sortBy (cmp `on` snd) unsorted
154− f (to, _) (from, _) = if to == from then Nothing else
155− Just (from, to)
156− reverseMapping = Map.fromList $ catMaybes $ zipWith f unsorted sorted
157− g (to, _) (from, _) = if to == from then Nothing else
158− let Just movingTo = Map.lookup to reverseMapping
159− in Just (to, NodeInfo (From_Move from) $ Just movingTo)
160−
161−-- | Create a 'PatchMapWithMove' that, if applied to the first 'Map' provided,
162−-- will produce a 'Map' with the same values as the second 'Map' but with the
163−-- values sorted with the given ordering function.
164−patchThatChangesAndSortsMapWith :: forall k v. (Ord k, Ord v) => (v -> v -> Ordering) -> Map k v -> Map k v -> PatchMapWithMove k v
165−patchThatChangesAndSortsMapWith cmp oldByIndex newByIndexUnsorted = patchThatChangesMap oldByIndex newByIndex
166− where newList = Map.toList newByIndexUnsorted
167− newByIndex = Map.fromList $ zip (fst <$> newList) $ sortBy cmp $ snd <$> newList
168−
169−-- | Create a 'PatchMapWithMove' that, if applied to the first 'Map' provided,
170−-- will produce the second 'Map'.
171−patchThatChangesMap :: (Ord k, Ord v) => Map k v -> Map k v -> PatchMapWithMove k v
172−patchThatChangesMap oldByIndex newByIndex = patch
173− where oldByValue = Map.fromListWith Set.union $ swap . first Set.singleton <$> Map.toList oldByIndex
174− (insertsAndMoves, unusedValuesByValue) = flip runState oldByValue $ do
175− let f k v = do
176− remainingValues <- get
177− let putRemainingKeys remainingKeys = put $ if Set.null remainingKeys
178− then Map.delete v remainingValues
179− else Map.insert v remainingKeys remainingValues
180− case Map.lookup v remainingValues of
181− Nothing -> return $ NodeInfo (From_Insert v) $ Just undefined -- There's no existing value we can take
182− Just fromKs ->
183− if k `Set.member` fromKs
184− then do
185− putRemainingKeys $ Set.delete k fromKs
186− return $ NodeInfo (From_Move k) $ Just undefined -- There's an existing value, and it's here, so no patch necessary
187− else do
188− (fromK, remainingKeys) <- return . fromJust $ Set.minView fromKs -- There's an existing value, but it's not here; move it here
189− putRemainingKeys remainingKeys
190− return $ NodeInfo (From_Move fromK) $ Just undefined
191− Map.traverseWithKey f newByIndex
192− unusedOldKeys = fold unusedValuesByValue
193− pointlessMove k = \case
194− From_Move k' | k == k' -> True
195− _ -> False
196− keyWasMoved k = if k `Map.member` oldByIndex && not (k `Set.member` unusedOldKeys)
197− then Just undefined
198− else Nothing
199− patch = unsafePatchMapWithMove $ Map.filterWithKey (\k -> not . pointlessMove k . _nodeInfo_from) $ Map.mergeWithKey (\k a _ -> Just $ nodeInfoSetTo (keyWasMoved k) a) (Map.mapWithKey $ \k -> nodeInfoSetTo $ keyWasMoved k) (Map.mapWithKey $ \k _ -> NodeInfo From_Delete $ keyWasMoved k) insertsAndMoves oldByIndex
200−
201−-- | Change the 'From' value of a 'NodeInfo'
202−nodeInfoMapFrom :: (From k v -> From k v) -> NodeInfo k v -> NodeInfo k v
203−nodeInfoMapFrom f ni = ni { _nodeInfo_from = f $ _nodeInfo_from ni }
204−
205−-- | Change the 'From' value of a 'NodeInfo', using a 'Functor' (or
206−-- 'Applicative', 'Monad', etc.) action to get the new value
207−nodeInfoMapMFrom :: Functor f => (From k v -> f (From k v)) -> NodeInfo k v -> f (NodeInfo k v)
208−nodeInfoMapMFrom f ni = fmap (\result -> ni { _nodeInfo_from = result }) $ f $ _nodeInfo_from ni
209−
210−-- | Set the 'To' field of a 'NodeInfo'
211−nodeInfoSetTo :: To k -> NodeInfo k v -> NodeInfo k v
212−nodeInfoSetTo to ni = ni { _nodeInfo_to = to }
213−
214−-- |Helper data structure used for composing patches using the monoid instance.
215−data Fixup k v
216− = Fixup_Delete
217− | Fixup_Update (These (From k v) (To k))
218−
219−-- |Compose patches having the same effect as applying the patches in turn: @'applyAlways' (p <> q) == 'applyAlways' p . 'applyAlways' q@
220−instance Ord k => Semigroup (PatchMapWithMove k v) where
221− PatchMapWithMove ma <> PatchMapWithMove mb = PatchMapWithMove m
222− where
223− connections = Map.toList $ Map.intersectionWithKey (\_ a b -> (_nodeInfo_to a, _nodeInfo_from b)) ma mb
224− h :: (k, (Maybe k, From k v)) -> [(k, Fixup k v)]
225− h (_, (mToAfter, editBefore)) = case (mToAfter, editBefore) of
226− (Just toAfter, From_Move fromBefore)
227− | fromBefore == toAfter
228− -> [(toAfter, Fixup_Delete)]
229− | otherwise
230− -> [ (toAfter, Fixup_Update (This editBefore))
231− , (fromBefore, Fixup_Update (That mToAfter))
232− ]
233− (Nothing, From_Move fromBefore) -> [(fromBefore, Fixup_Update (That mToAfter))] -- The item is destroyed in the second patch, so indicate that it is destroyed in the source map
234− (Just toAfter, _) -> [(toAfter, Fixup_Update (This editBefore))]
235− (Nothing, _) -> []
236− mergeFixups _ Fixup_Delete Fixup_Delete = Fixup_Delete
237− mergeFixups _ (Fixup_Update a) (Fixup_Update b)
238− | This x <- a, That y <- b
239− = Fixup_Update $ These x y
240− | That y <- a, This x <- b
241− = Fixup_Update $ These x y
242− mergeFixups _ _ _ = error "PatchMapWithMove: incompatible fixups"
243− fixups = Map.fromListWithKey mergeFixups $ concatMap h connections
244− combineNodeInfos _ nia nib = NodeInfo
245− { _nodeInfo_from = _nodeInfo_from nia
246− , _nodeInfo_to = _nodeInfo_to nib
247− }
248− applyFixup _ ni = \case
249− Fixup_Delete -> Nothing
250− Fixup_Update u -> Just $ NodeInfo
251− { _nodeInfo_from = fromMaybe (_nodeInfo_from ni) $ getHere u
252− , _nodeInfo_to = fromMaybe (_nodeInfo_to ni) $ getThere u
253− }
254− m = Map.differenceWithKey applyFixup (Map.unionWithKey combineNodeInfos ma mb) fixups
255− getHere :: These a b -> Maybe a
256− getHere = \case
257− This a -> Just a
258− These a _ -> Just a
259− That _ -> Nothing
260− getThere :: These a b -> Maybe b
261− getThere = \case
262− This _ -> Nothing
263− These _ b -> Just b
264− That b -> Just b
265−
266−--TODO: Figure out how to implement this in terms of PatchDMapWithMove rather than duplicating it here
267−-- |Compose patches having the same effect as applying the patches in turn: @'applyAlways' (p <> q) == 'applyAlways' p . 'applyAlways' q@
268−instance Ord k => Monoid (PatchMapWithMove k v) where
269− mempty = PatchMapWithMove mempty
270− mappend = (<>)
src/Reflex/PerformEvent/Base.hs+2
@@ -164,6 +164,8 @@ instance (ReflexHost t, MonadHold t m) => MonadHold t (PerformEventT t m) where
164164 buildDynamic getV0 v' = PerformEventT $ lift $ buildDynamic getV0 v'
165165 {-# INLINABLE headE #-}
166166 headE = PerformEventT . lift . headE
167+ {-# INLINABLE now #-}
168+ now = PerformEventT . lift $ now
167169
168170instance (MonadRef (HostFrame t), ReflexHost t) => MonadRef (PerformEventT t m) where
169171 type Ref (PerformEventT t m) = Ref (HostFrame t)
src/Reflex/PerformEvent/Class.hs+6−1
@@ -8,7 +8,6 @@
88{-# LANGUAGE RankNTypes #-}
99{-# LANGUAGE ScopedTypeVariables #-}
1010{-# LANGUAGE TypeFamilies #-}
11−{-# LANGUAGE TypeOperators #-}
1211{-# LANGUAGE UndecidableInstances #-}
1312#ifdef USE_REFLEX_OPTIMIZER
1413{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
@@ -22,6 +21,7 @@ import Reflex.Class
2221import Reflex.TriggerEvent.Class
2322
2423import Control.Monad.Reader
24+import Control.Monad.Trans.Maybe (MaybeT (..))
2525
2626-- | 'PerformEvent' represents actions that can trigger other actions based on
2727-- 'Event's.
@@ -61,3 +61,8 @@ instance PerformEvent t m => PerformEvent t (ReaderT r m) where
6161 performEvent e = do
6262 r <- ask
6363 lift $ performEvent $ flip runReaderT r <$> e
64+
65+instance PerformEvent t m => PerformEvent t (MaybeT m) where
66+ type Performable (MaybeT m) = MaybeT (Performable m)
67+ performEvent_ = lift . performEvent_ . fmapCheap (void . runMaybeT)
68+ performEvent = lift . fmap (fmapMaybe id) . performEvent . fmapCheap runMaybeT
src/Reflex/PostBuild/Base.hs+2−1
@@ -9,7 +9,6 @@
99{-# LANGUAGE RecursiveDo #-}
1010{-# LANGUAGE ScopedTypeVariables #-}
1111{-# LANGUAGE TypeFamilies #-}
12−{-# LANGUAGE TypeOperators #-}
1312{-# LANGUAGE UndecidableInstances #-}
1413#ifdef USE_REFLEX_OPTIMIZER
1514{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
@@ -84,6 +83,8 @@ instance MonadHold t m => MonadHold t (PostBuildT t m) where
8483 buildDynamic a0 = lift . buildDynamic a0
8584 {-# INLINABLE headE #-}
8685 headE = lift . headE
86+ {-# INLINABLE now #-}
87+ now = lift now
8788
8889instance PerformEvent t m => PerformEvent t (PostBuildT t m) where
8990 type Performable (PostBuildT t m) = Performable m
src/Reflex/PostBuild/Class.hs−1
@@ -6,7 +6,6 @@
66{-# LANGUAGE FunctionalDependencies #-}
77{-# LANGUAGE ScopedTypeVariables #-}
88{-# LANGUAGE TypeFamilies #-}
9−{-# LANGUAGE TypeOperators #-}
109{-# LANGUAGE UndecidableInstances #-}
1110#ifdef USE_REFLEX_OPTIMIZER
1211{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
src/Reflex/Profiled.hs+59−5
@@ -26,8 +26,10 @@ import Control.Monad.Primitive
2626import Control.Monad.Reader
2727import Control.Monad.Ref
2828import Control.Monad.State.Strict (StateT, execStateT, modify)
29+import Data.Bifunctor
2930import Data.Coerce
30−import Data.Dependent.Map (DMap, GCompare)
31+import Data.Dependent.Map (DMap)
32+import Data.GADT.Compare (GCompare)
3133import Data.FastMutableIntMap
3234import Data.IORef
3335import Data.List
@@ -42,12 +44,20 @@ import Foreign.Ptr
4244import GHC.Foreign
4345import GHC.IO.Encoding
4446import GHC.Stack
47+import Reflex.Adjustable.Class
48+import Reflex.BehaviorWriter.Class
4549import Reflex.Class
50+import Reflex.DynamicWriter.Class
51+import Reflex.EventWriter.Class
4652import Reflex.Host.Class
53+import Reflex.NotReady.Class
4754import Reflex.PerformEvent.Class
55+import Reflex.PostBuild.Class
56+import Reflex.Query.Class
57+import Reflex.Requester.Class
58+import Reflex.TriggerEvent.Class
4859
4960import System.IO.Unsafe
50−import Unsafe.Coerce
5161
5262data ProfiledTimeline t
5363
@@ -137,7 +147,7 @@ instance Reflex t => Reflex (ProfiledTimeline t) where
137147 pushCheap f (Event_Profiled e) = coerce $ pushCheap (coerce f) $ profileEvent e
138148 pull = Behavior_Profiled . pull . coerce
139149 fanG (Event_Profiled e) = EventSelectorG $ coerce $ selectG (fanG $ profileEvent e)
140− mergeG :: forall (k :: z -> *) q v. GCompare k
150+ mergeG :: forall z (k :: z -> *) q v. GCompare k
141151 => (forall a. q a -> Event (ProfiledTimeline t) (v a))
142152 -> DMap k q -> Event (ProfiledTimeline t) (DMap k v)
143153 mergeG nt = Event_Profiled #. mergeG (coerce nt)
@@ -147,8 +157,8 @@ instance Reflex t => Reflex (ProfiledTimeline t) where
147157 updated (Dynamic_Profiled d) = coerce $ profileEvent $ updated d
148158 unsafeBuildDynamic (ProfiledM a0) (Event_Profiled a') = coerce $ unsafeBuildDynamic a0 a'
149159 unsafeBuildIncremental (ProfiledM a0) (Event_Profiled a') = coerce $ unsafeBuildIncremental a0 a'
150− mergeIncrementalG nt = (Event_Profiled . coerce) #. mergeIncrementalG nt
151− mergeIncrementalWithMoveG nt = (Event_Profiled . coerce) #. mergeIncrementalWithMoveG nt
160+ mergeIncrementalG nt res = Event_Profiled $ mergeIncrementalG (coerce nt) (coerce res)
161+ mergeIncrementalWithMoveG nt res = Event_Profiled $ mergeIncrementalWithMoveG (coerce nt) (coerce res)
152162 currentIncremental (Incremental_Profiled i) = coerce $ currentIncremental i
153163 updatedIncremental (Incremental_Profiled i) = coerce $ profileEvent $ updatedIncremental i
154164 incrementalToDynamic (Incremental_Profiled i) = coerce $ incrementalToDynamic i
@@ -174,10 +184,21 @@ instance MonadHold t m => MonadHold (ProfiledTimeline t) (ProfiledM m) where
174184 holdIncremental v0 (Event_Profiled v') = ProfiledM $ Incremental_Profiled <$> holdIncremental v0 v'
175185 buildDynamic (ProfiledM v0) (Event_Profiled v') = ProfiledM $ Dynamic_Profiled <$> buildDynamic v0 v'
176186 headE (Event_Profiled e) = ProfiledM $ Event_Profiled <$> headE e
187+ now = ProfiledM $ Event_Profiled <$> now
177188
178189instance MonadSample t m => MonadSample (ProfiledTimeline t) (ProfiledM m) where
179190 sample (Behavior_Profiled b) = ProfiledM $ sample b
180191
192+instance Adjustable t m => Adjustable (ProfiledTimeline t) (ProfiledM m) where
193+ runWithReplace a0 a' = (fmap . fmap) coerce . lift $
194+ runWithReplace (coerce a0) (coerce $ coerce <$> a')
195+ traverseIntMapWithKeyWithAdjust f dm0 dm' = (fmap . fmap) coerce . lift $
196+ traverseIntMapWithKeyWithAdjust (\k v -> coerce $ f k v) dm0 (coerce dm')
197+ traverseDMapWithKeyWithAdjust f dm0 dm' = (fmap . fmap) coerce . lift $
198+ traverseDMapWithKeyWithAdjust (\k v -> coerce $ f k v) dm0 (coerce dm')
199+ traverseDMapWithKeyWithAdjustWithMove f dm0 dm' = (fmap . fmap) coerce . lift $
200+ traverseDMapWithKeyWithAdjustWithMove (\k v -> coerce $ f k v) dm0 (coerce dm')
201+
181202instance MonadTrans ProfiledM where
182203 lift = ProfiledM
183204
@@ -189,6 +210,39 @@ instance PerformEvent t m => PerformEvent (ProfiledTimeline t) (ProfiledM m) whe
189210 performEvent_ = lift . performEvent_ . coerce
190211 performEvent = lift . fmap coerce . performEvent . coerce
191212
213+instance TriggerEvent t m => TriggerEvent (ProfiledTimeline t) (ProfiledM m) where
214+ newTriggerEvent = first coerce <$> lift newTriggerEvent
215+ newTriggerEventWithOnComplete = first coerce <$> lift newTriggerEventWithOnComplete
216+ newEventWithLazyTriggerWithOnComplete f = coerce <$> lift (newEventWithLazyTriggerWithOnComplete f)
217+
218+instance PostBuild t m => PostBuild (ProfiledTimeline t) (ProfiledM m) where
219+ getPostBuild = coerce <$> lift getPostBuild
220+
221+instance NotReady t m => NotReady (ProfiledTimeline t) (ProfiledM m) where
222+ notReady = lift notReady
223+ notReadyUntil = lift . notReadyUntil . coerce
224+
225+instance BehaviorWriter t w m => BehaviorWriter (ProfiledTimeline t) w (ProfiledM m) where
226+ tellBehavior = lift . tellBehavior . coerce
227+
228+instance DynamicWriter t w m => DynamicWriter (ProfiledTimeline t) w (ProfiledM m) where
229+ tellDyn = lift . tellDyn . coerce
230+
231+instance EventWriter t w m => EventWriter (ProfiledTimeline t) w (ProfiledM m) where
232+ tellEvent = lift . tellEvent . coerce
233+
234+instance MonadQuery t q m => MonadQuery (ProfiledTimeline t) q (ProfiledM m) where
235+ tellQueryIncremental = lift . tellQueryIncremental . coerce
236+ askQueryResult = coerce <$> lift askQueryResult
237+ queryIncremental = fmap coerce . lift . queryIncremental . coerce
238+
239+instance Requester t m => Requester (ProfiledTimeline t) (ProfiledM m) where
240+ type Request (ProfiledM m) = Request m
241+ type Response (ProfiledM m) = Response m
242+
243+ requesting = fmap coerce . lift . requesting . coerce
244+ requesting_ = lift . requesting_ . coerce
245+
192246instance MonadRef m => MonadRef (ProfiledM m) where
193247 type Ref (ProfiledM m) = Ref m
194248 newRef = lift . newRef
src/Reflex/Pure.hs+6−1
@@ -32,7 +32,8 @@ module Reflex.Pure
3232 ) where
3333
3434import Control.Monad
35−import Data.Dependent.Map (DMap, GCompare)
35+import Data.Dependent.Map (DMap)
36+import Data.GADT.Compare (GCompare)
3637import qualified Data.Dependent.Map as DMap
3738import Data.IntMap (IntMap)
3839import qualified Data.IntMap as IntMap
@@ -210,3 +211,7 @@ instance (Enum t, HasTrie t, Ord t) => MonadHold (Pure t) ((->) t) where
210211 Just x -> fromMaybe lastValue $ apply x lastValue
211212
212213 headE = slowHeadE
214+ now t = Event $ guard . (t ==)
215+
216+
217+
src/Reflex/Query/Base.hs+15−4
@@ -16,21 +16,25 @@ module Reflex.Query.Base
1616 , mapQueryResult
1717 , dynWithQueryT
1818 , withQueryT
19+ , mapQueryT
1920 ) where
2021
2122import Control.Applicative (liftA2)
2223import Control.Monad.Exception
2324import Control.Monad.Fix
25+import Control.Monad.Morph
2426import Control.Monad.Primitive
2527import Control.Monad.Reader
2628import Control.Monad.Ref
2729import Control.Monad.State.Strict
2830import Data.Align
29−import Data.Dependent.Map (DMap, DSum (..))
31+import Data.Dependent.Map (DMap)
3032import qualified Data.Dependent.Map as DMap
33+import Data.Dependent.Sum (DSum(..))
3134import Data.Foldable
3235import Data.Functor.Compose
3336import Data.Functor.Misc
37+import Data.GADT.Compare (GCompare)
3438import Data.IntMap (IntMap)
3539import qualified Data.IntMap as IntMap
3640import Data.Map (Map)
@@ -46,7 +50,7 @@ import Reflex.DynamicWriter.Class
4650import Reflex.EventWriter.Base
4751import Reflex.EventWriter.Class
4852import Reflex.Host.Class
49−import qualified Reflex.Patch.MapWithMove as MapWithMove
53+import qualified Data.Patch.MapWithMove as MapWithMove
5054import Reflex.PerformEvent.Class
5155import Reflex.PostBuild.Class
5256import Reflex.Query.Class
@@ -134,7 +138,7 @@ instance (Reflex t, MonadFix m, Group q, Additive q, Query q, Eq q, MonadHold t
134138 tellQueryIncremental $ unsafeBuildIncremental (fold <$> mapM sampleBs liftedBs0) qpatch
135139 return (liftedResult0, liftedResult')
136140
137− traverseDMapWithKeyWithAdjust :: forall (k :: * -> *) v v'. (DMap.GCompare k) => (forall a. k a -> v a -> QueryT t q m (v' a)) -> DMap k v -> Event t (PatchDMap k v) -> QueryT t q m (DMap k v', Event t (PatchDMap k v'))
141+ traverseDMapWithKeyWithAdjust :: forall (k :: * -> *) v v'. (GCompare k) => (forall a. k a -> v a -> QueryT t q m (v' a)) -> DMap k v -> Event t (PatchDMap k v) -> QueryT t q m (DMap k v', Event t (PatchDMap k v'))
138142 traverseDMapWithKeyWithAdjust f dm0 dm' = do
139143 let f' :: forall a. k a -> v a -> EventWriterT t q (ReaderT (Dynamic t (QueryResult q)) m) (Compose (QueryTLoweredResult t q) v' a)
140144 f' k v = fmap (Compose . QueryTLoweredResult) $ flip runStateT [] $ unQueryT $ f k v
@@ -179,7 +183,7 @@ instance (Reflex t, MonadFix m, Group q, Additive q, Query q, Eq q, MonadHold t
179183 tellQueryIncremental $ unsafeBuildIncremental (fold <$> mapM sampleBs liftedBs0) qpatch
180184 return (liftedResult0, liftedResult')
181185
182− traverseDMapWithKeyWithAdjustWithMove :: forall (k :: * -> *) v v'. (DMap.GCompare k) => (forall a. k a -> v a -> QueryT t q m (v' a)) -> DMap k v -> Event t (PatchDMapWithMove k v) -> QueryT t q m (DMap k v', Event t (PatchDMapWithMove k v'))
186+ traverseDMapWithKeyWithAdjustWithMove :: forall (k :: * -> *) v v'. (GCompare k) => (forall a. k a -> v a -> QueryT t q m (v' a)) -> DMap k v -> Event t (PatchDMapWithMove k v) -> QueryT t q m (DMap k v', Event t (PatchDMapWithMove k v'))
183187 traverseDMapWithKeyWithAdjustWithMove f dm0 dm' = do
184188 let f' :: forall a. k a -> v a -> EventWriterT t q (ReaderT (Dynamic t (QueryResult q)) m) (Compose (QueryTLoweredResult t q) v' a)
185189 f' k v = fmap (Compose . QueryTLoweredResult) $ flip runStateT [] $ unQueryT $ f k v
@@ -236,6 +240,9 @@ instance (Reflex t, MonadFix m, Group q, Additive q, Query q, Eq q, MonadHold t
236240instance MonadTrans (QueryT t q) where
237241 lift = QueryT . lift . lift . lift
238242
243+instance MFunctor (QueryT t q) where
244+ hoist = mapQueryT
245+
239246instance PrimMonad m => PrimMonad (QueryT t q m) where
240247 type PrimState (QueryT t q m) = PrimState m
241248 primitive = lift . primitive
@@ -287,6 +294,10 @@ withQueryT f a = do
287294 (fmapCheap (AdditivePatch . mapQuery f . unAdditivePatch) $ updatedIncremental q)
288295 return result
289296
297+-- | Maps a function over a 'QueryT' that can change the underlying monad
298+mapQueryT :: (forall b. m b -> n b) -> QueryT t q m a -> QueryT t q n a
299+mapQueryT f (QueryT a) = QueryT $ mapStateT (mapEventWriterT (mapReaderT f)) a
300+
290301-- | dynWithQueryT's (Dynamic t QueryMorphism) argument needs to be a group homomorphism at all times in order to behave correctly
291302dynWithQueryT :: (MonadFix m, PostBuild t m, Group q, Additive q, Group q', Additive q', Query q')
292303 => Dynamic t (QueryMorphism q q')
src/Reflex/Query/Class.hs+15−7
@@ -38,7 +38,7 @@ import qualified Data.Map.Monoidal as MonoidalMap
3838import Data.Semigroup (Semigroup(..))
3939import Foreign.Storable
4040import Data.Void
41−import Data.Monoid
41+import Data.Monoid hiding ((<>))
4242import Control.Applicative
4343
4444import Reflex.Class
@@ -66,7 +66,14 @@ instance Query () where
6666 crop _ _ = ()
6767
6868-- | The result of an absurd query is trivial; If you can ask the question, the
69−-- answer cannot tell you anything you didn't already know
69+-- answer cannot tell you anything you didn't already know.
70+--
71+-- 'QueryResult Void = @Void@' seems like it would also work, but that has
72+-- problems of robustness. In some applications, an unasked question can still
73+-- be answered, so it is important that the result is inhabited even when the
74+-- question isn't. Applications that wish to prevent this can mandate that the
75+-- query result be paired with the query: then the whole response will be
76+-- uninhabited as desired.
7077instance Query Void where
7178 type QueryResult Void = ()
7279 crop = absurd
@@ -78,6 +85,7 @@ instance (Query q, Applicative f) => Query (Ap f q) where
7885 type QueryResult (Ap f q) = Ap f (QueryResult q)
7986 crop = liftA2 crop
8087#endif
88+
8189-- | QueryMorphism's must be group homomorphisms when acting on the query type
8290-- and compatible with the query relationship when acting on the query result.
8391data QueryMorphism q q' = QueryMorphism
@@ -117,7 +125,7 @@ instance Group SelectedCount where
117125
118126instance Additive SelectedCount
119127
120−-- | The Semigroup/Monoid/Group instances for a Query containing 'SelectedCount's should use
128+-- | The Semigroup\/Monoid\/Group instances for a Query containing 'SelectedCount's should use
121129-- this function which returns Nothing if the result is 0. This allows the pruning of leaves
122130-- of the 'Query' that are no longer wanted.
123131combineSelectedCounts :: SelectedCount -> SelectedCount -> Maybe SelectedCount
@@ -125,12 +133,12 @@ combineSelectedCounts (SelectedCount i) (SelectedCount j) = if i == negate j the
125133
126134-- | A class that allows sending of 'Query's and retrieval of 'QueryResult's. See 'queryDyn' for a commonly
127135-- used interface.
128−class (Group q, Additive q, Query q) => MonadQuery t q m | m -> q t where
136+class (Group q, Additive q, Query q, Monad m) => MonadQuery t q m | m -> q t where
129137 tellQueryIncremental :: Incremental t (AdditivePatch q) -> m ()
130138 askQueryResult :: m (Dynamic t (QueryResult q))
131139 queryIncremental :: Incremental t (AdditivePatch q) -> m (Dynamic t (QueryResult q))
132140
133−instance (Monad m, MonadQuery t q m) => MonadQuery t q (ReaderT r m) where
141+instance MonadQuery t q m => MonadQuery t q (ReaderT r m) where
134142 tellQueryIncremental = lift . tellQueryIncremental
135143 askQueryResult = lift askQueryResult
136144 queryIncremental = lift . queryIncremental
@@ -140,11 +148,11 @@ tellQueryDyn :: (Reflex t, MonadQuery t q m) => Dynamic t q -> m ()
140148tellQueryDyn d = tellQueryIncremental $ unsafeBuildIncremental (sample (current d)) $ attachWith (\old new -> AdditivePatch $ new ~~ old) (current d) (updated d)
141149
142150-- | Retrieve 'Dynamic'ally updating 'QueryResult's for a 'Dynamic'ally updating 'Query'.
143−queryDyn :: (Reflex t, Monad m, MonadQuery t q m) => Dynamic t q -> m (Dynamic t (QueryResult q))
151+queryDyn :: (Reflex t, MonadQuery t q m) => Dynamic t q -> m (Dynamic t (QueryResult q))
144152queryDyn q = do
145153 tellQueryDyn q
146154 zipDynWith crop q <$> askQueryResult
147155
148156-- | Use a query morphism to operate on a smaller version of a query.
149−subQuery :: (Reflex t, MonadQuery t q2 m, Monad m) => QueryMorphism q1 q2 -> Dynamic t q1 -> m (Dynamic t (QueryResult q1))
157+subQuery :: (Reflex t, MonadQuery t q2 m) => QueryMorphism q1 q2 -> Dynamic t q1 -> m (Dynamic t (QueryResult q1))
150158subQuery (QueryMorphism f g) x = fmap g <$> queryDyn (fmap f x)
src/Reflex/Requester/Base.hs+97−27
@@ -1,6 +1,7 @@
11-- | This module provides 'RequesterT', the standard implementation of
22-- 'Requester'.
33{-# LANGUAGE AllowAmbiguousTypes #-}
4+{-# LANGUAGE ApplicativeDo #-}
45{-# LANGUAGE CPP #-}
56{-# LANGUAGE EmptyDataDecls #-}
67{-# LANGUAGE ExistentialQuantification #-}
@@ -32,6 +33,7 @@ module Reflex.Requester.Base
3233 , requesterDataToList
3334 , singletonRequesterData
3435 , matchResponsesWithRequests
36+ , matchResponseMapWithRequests
3537 , multiEntry
3638 , unMultiEntry
3739 , requesting'
@@ -49,14 +51,17 @@ import Reflex.TriggerEvent.Class
4951import Control.Applicative (liftA2)
5052import Control.Monad.Exception
5153import Control.Monad.Identity
54+import Control.Monad.Morph
5255import Control.Monad.Primitive
5356import Control.Monad.Reader
5457import Control.Monad.Ref
5558import Control.Monad.State.Strict
5659import Data.Bits
5760import Data.Coerce
58−import Data.Dependent.Map (DMap, DSum (..))
61+import Data.Constraint
62+import Data.Dependent.Map (DMap)
5963import qualified Data.Dependent.Map as DMap
64+import Data.Dependent.Sum (DSum (..))
6065import Data.Functor.Compose
6166import Data.Functor.Misc
6267import Data.IntMap.Strict (IntMap)
@@ -79,19 +84,51 @@ newtype TagMap (f :: * -> *) = TagMap (IntMap Any)
7984
8085newtype RequesterData f = RequesterData (TagMap (Entry f))
8186
87+emptyRequesterData :: RequesterData f
88+emptyRequesterData = RequesterData $ TagMap IntMap.empty
89+
8290data RequesterDataKey a where
8391 RequesterDataKey_Single :: {-# UNPACK #-} !(MyTag (Single a)) -> RequesterDataKey a
8492 RequesterDataKey_Multi :: {-# UNPACK #-} !(MyTag Multi) -> {-# UNPACK #-} !Int -> !(RequesterDataKey a) -> RequesterDataKey a --TODO: Don't put a second Int here (or in the other Multis); use a single Int instead
85− RequesterDataKey_Multi2 :: {-# UNPACK #-} !(MyTag (Multi2 k)) -> !(Some k) -> {-# UNPACK #-} !Int -> !(RequesterDataKey a) -> RequesterDataKey a
93+ RequesterDataKey_Multi2 :: GCompare k => {-# UNPACK #-} !(MyTag (Multi2 k)) -> !(Some k) -> {-# UNPACK #-} !Int -> !(RequesterDataKey a) -> RequesterDataKey a
8694 RequesterDataKey_Multi3 :: {-# UNPACK #-} !(MyTag Multi3) -> {-# UNPACK #-} !Int -> {-# UNPACK #-} !Int -> !(RequesterDataKey a) -> RequesterDataKey a
8795
8896singletonRequesterData :: RequesterDataKey a -> f a -> RequesterData f
8997singletonRequesterData rdk v = case rdk of
9098 RequesterDataKey_Single k -> RequesterData $ singletonTagMap k $ Entry v
9199 RequesterDataKey_Multi k k' k'' -> RequesterData $ singletonTagMap k $ Entry $ IntMap.singleton k' $ singletonRequesterData k'' v
92− RequesterDataKey_Multi2 k k' k'' k''' -> RequesterData $ singletonTagMap k $ Entry $ Map.singleton k' $ IntMap.singleton k'' $ singletonRequesterData k''' v
100+ RequesterDataKey_Multi2 k k' k'' k''' -> RequesterData $ singletonTagMap k $ Entry $ Multi2Contents
101+ { _multi2Contents_values = Map.singleton k' $ IntMap.singleton k'' $ singletonRequesterData k''' v
102+ , _multi2Contents_dict = Dict
103+ }
93104 RequesterDataKey_Multi3 k k' k'' k''' -> RequesterData $ singletonTagMap k $ Entry $ IntMap.singleton k' $ IntMap.singleton k'' $ singletonRequesterData k''' v
94105
106+mergeRequesterData :: RequesterData f -> RequesterData f -> RequesterData f
107+mergeRequesterData (RequesterData a) (RequesterData b) = RequesterData $ mergeTagMap a b
108+
109+mergeTagMap :: forall f. TagMap (Entry f) -> TagMap (Entry f) -> TagMap (Entry f)
110+mergeTagMap (TagMap m) (TagMap n) =
111+ TagMap $ IntMap.unionWithKey (g' combiner) m n
112+ where
113+ combiner :: forall a. MyTag a -> Entry f a -> Entry f a -> Entry f a
114+ combiner k (Entry a) (Entry b) = Entry $ case myKeyType k of
115+ MyTagType_Single -> a
116+ MyTagType_Multi -> IntMap.unionWith mergeRequesterData a b
117+ MyTagType_Multi2 -> case _multi2Contents_dict a of
118+ Dict -> Multi2Contents
119+ { _multi2Contents_values = Map.unionWith (IntMap.unionWith mergeRequesterData) (_multi2Contents_values a) (_multi2Contents_values b)
120+ , _multi2Contents_dict = Dict
121+ }
122+ MyTagType_Multi3 -> IntMap.unionWith (IntMap.unionWith mergeRequesterData) a b
123+ g' :: (forall a. MyTag a -> Entry f a -> Entry f a -> Entry f a) -> Int -> Any -> Any -> Any
124+ g' f rawKey a b =
125+ let k = MyTag rawKey :: MyTag a
126+ fromAny :: Any -> Entry f a
127+ fromAny = unsafeCoerce
128+ toAny :: Entry f a -> Any
129+ toAny = unsafeCoerce
130+ in toAny $ f k (fromAny a) (fromAny b)
131+
95132requesterDataToList :: RequesterData f -> [DSum RequesterDataKey f]
96133requesterDataToList (RequesterData m) = do
97134 k :=> Entry e <- tagMapToList m
@@ -101,11 +138,12 @@ requesterDataToList (RequesterData m) = do
101138 (k', e') <- IntMap.toList e
102139 k'' :=> e'' <- requesterDataToList e'
103140 return $ RequesterDataKey_Multi k k' k'' :=> e''
104− MyTagType_Multi2 -> do
105− (k', e') <- Map.toList e
106− (k'', e'') <- IntMap.toList e'
107− k''' :=> e''' <- requesterDataToList e''
108− return $ RequesterDataKey_Multi2 k k' k'' k''' :=> e'''
141+ MyTagType_Multi2 -> case _multi2Contents_dict e of
142+ Dict -> do
143+ (k', e') <- Map.toList $ _multi2Contents_values e
144+ (k'', e'') <- IntMap.toList e'
145+ k''' :=> e''' <- requesterDataToList e''
146+ return $ RequesterDataKey_Multi2 k k' k'' k''' :=> e'''
109147 MyTagType_Multi3 -> do
110148 (k', e') <- IntMap.toList e
111149 (k'', e'') <- IntMap.toList e'
@@ -133,7 +171,13 @@ traverseRequesterData f (RequesterData m) = RequesterData <$> traverseTagMapWith
133171 go k (Entry request) = Entry <$> case myKeyType k of
134172 MyTagType_Single -> f request
135173 MyTagType_Multi -> traverse (traverseRequesterData f) request
136− MyTagType_Multi2 -> traverse (traverse (traverseRequesterData f)) request
174+ MyTagType_Multi2 -> case request of
175+ Multi2Contents { _multi2Contents_values = request', _multi2Contents_dict = Dict } -> do
176+ v <- traverse (traverse (traverseRequesterData f)) request'
177+ pure $ Multi2Contents
178+ { _multi2Contents_values = v
179+ , _multi2Contents_dict = Dict
180+ }
137181 MyTagType_Multi3 -> traverse (traverse (traverseRequesterData f)) request
138182
139183-- | 'traverseRequesterData' with its arguments flipped
@@ -177,9 +221,14 @@ instance MyTagTypeOffset Multi3 where
177221type family EntryContents request a where
178222 EntryContents request (Single a) = request a
179223 EntryContents request Multi = IntMap (RequesterData request)
180− EntryContents request (Multi2 k) = Map (Some k) (IntMap (RequesterData request))
224+ EntryContents request (Multi2 k) = Multi2Contents k request
181225 EntryContents request Multi3 = IntMap (IntMap (RequesterData request))
182226
227+data Multi2Contents k request = Multi2Contents
228+ { _multi2Contents_dict :: {-# UNPACK #-} !(Dict (GCompare k)) -- This is a Dict instead of an existential context because we only want to use it in certain circumstances
229+ , _multi2Contents_values :: {-# UNPACK #-} !(Map (Some k) (IntMap (RequesterData request)))
230+ }
231+
183232newtype Entry request x = Entry { unEntry :: EntryContents request x }
184233
185234{-# INLINE singleEntry #-}
@@ -308,7 +357,7 @@ tagRequest req = do
308357 return t
309358
310359{-# INLINE responseFromTag #-}
311−responseFromTag :: Monad m => MyTagWrap response (Entry response x) -> RequesterT t request response m (Event t (Entry response x))
360+responseFromTag :: forall m t request response x. Monad m => MyTagWrap response (Entry response x) -> RequesterT t request response m (Event t (Entry response x))
312361responseFromTag (MyTagWrap t) = do
313362 responses :: EventSelectorInt t Any <- RequesterT ask
314363 return $ (unsafeCoerce :: Event t Any -> Event t (Entry response x)) $ selectInt responses t
@@ -316,6 +365,9 @@ responseFromTag (MyTagWrap t) = do
316365instance MonadTrans (RequesterT t request response) where
317366 lift = RequesterT . lift . lift
318367
368+instance MFunctor (RequesterT t request response) where
369+ hoist f = RequesterT . hoist (hoist f) . unRequesterT
370+
319371instance PerformEvent t m => PerformEvent t (RequesterT t request response m) where
320372 type Performable (RequesterT t request response m) = Performable m
321373 performEvent_ = lift . performEvent_
@@ -435,9 +487,9 @@ traverseDMapWithKeyWithAdjustRequesterTWith base mapPatch weakenPatchWith patchN
435487 let responses :: EventSelector t (Const2 (Some k) (IntMap (RequesterData response)))
436488 responses = fanMap $ fmapCheap unpack response
437489 unpack :: Entry response (Multi2 k) -> Map (Some k) (IntMap (RequesterData response))
438− unpack = unEntry
490+ unpack = _multi2Contents_values . unEntry
439491 pack :: Map (Some k) (IntMap (RequesterData request)) -> Entry request (Multi2 k)
440− pack = Entry
492+ pack m = Entry $ Multi2Contents { _multi2Contents_values = m, _multi2Contents_dict = Dict }
441493 f' :: forall a. k a -> Compose ((,) Int) v a -> m (Compose ((,) (Event t (IntMap (RequesterData request)))) v' a)
442494 f' k (Compose (n, v)) = do
443495 (result, myRequests) <- runRequesterT (f k v) $ mapMaybeCheap (IntMap.lookup n) $ select responses (Const2 (Some k))
@@ -458,9 +510,6 @@ traverseDMapWithKeyWithAdjustRequesterTWith base mapPatch weakenPatchWith patchN
458510data Decoder rawResponse response =
459511 forall a. Decoder (RequesterDataKey a) (rawResponse -> response a)
460512
461−-- | Matches incoming responses with previously-sent requests
462−-- and uses the provided request "decoder" function to process
463−-- incoming responses.
464513matchResponsesWithRequests
465514 :: forall t rawRequest rawResponse request response m.
466515 ( MonadFix m
@@ -479,7 +528,30 @@ matchResponsesWithRequests
479528 )
480529 -- ^ A map of outgoing wire-format requests and an event of responses keyed
481530 -- by the 'RequesterData' key of the associated outgoing request
482−matchResponsesWithRequests f send recv = do
531+matchResponsesWithRequests f send recv = matchResponseMapWithRequests f send $ uncurry Map.singleton <$> recv
532+
533+-- | Matches incoming responses with previously-sent requests
534+-- and uses the provided request "decoder" function to process
535+-- incoming responses.
536+matchResponseMapWithRequests
537+ :: forall t rawRequest rawResponse request response m.
538+ ( MonadFix m
539+ , MonadHold t m
540+ , Reflex t
541+ )
542+ => (forall a. request a -> (rawRequest, rawResponse -> response a))
543+ -- ^ Given a request (from 'Requester'), produces the wire format of the
544+ -- request and a function used to process the associated response
545+ -> Event t (RequesterData request)
546+ -- ^ The outgoing requests
547+ -> Event t (Map Int rawResponse)
548+ -- ^ A map of incoming responses, tagged by an identifying key
549+ -> m ( Event t (Map Int rawRequest)
550+ , Event t (RequesterData response)
551+ )
552+ -- ^ A map of outgoing wire-format requests and an event of responses keyed
553+ -- by the 'RequesterData' key of the associated outgoing request
554+matchResponseMapWithRequests f send recv = do
483555 rec nextId <- hold 1 $ fmap (\(next, _, _) -> next) outgoing
484556 waitingFor :: Incremental t (PatchMap Int (Decoder rawResponse response)) <-
485557 holdIncremental mempty $ leftmost
@@ -521,17 +593,15 @@ matchResponsesWithRequests f send recv = do
521593 processIncoming
522594 :: Incremental t (PatchMap Int (Decoder rawResponse response))
523595 -- A map of outstanding expected responses
524− -> Event t (Int, rawResponse)
596+ -> Event t (Map Int rawResponse)
525597 -- A incoming response paired with its identifying key
526598 -> Event t (RequesterData response, PatchMap Int v)
527599 -- The decoded response and a patch that clears the outstanding responses queue
528− processIncoming waitingFor inc = flip push inc $ \(n, rawRsp) -> do
600+ processIncoming waitingFor inc = flip push inc $ \rspMap -> do
529601 wf <- sample $ currentIncremental waitingFor
530− case Map.lookup n wf of
531− Nothing -> return Nothing -- TODO How should lookup failures be handled here? They shouldn't ever happen..
532− Just (Decoder k rspF) -> do
533− let rsp = rspF rawRsp
534− return $ Just
535− ( singletonRequesterData k rsp
536− , PatchMap $ Map.singleton n Nothing
537− )
602+ let match rawRsp (Decoder k rspF) =
603+ let rsp = rspF rawRsp
604+ in singletonRequesterData k rsp
605+ matches = Map.intersectionWith match rspMap wf
606+ pure $ if Map.null matches then Nothing else Just
607+ (Map.foldl' mergeRequesterData emptyRequesterData matches, PatchMap $ Nothing <$ matches)
src/Reflex/Spider/Internal.hs+458−259
@@ -9,7 +9,6 @@
99{-# LANGUAGE GADTs #-}
1010{-# LANGUAGE GeneralizedNewtypeDeriving #-}
1111{-# LANGUAGE LambdaCase #-}
12−{-# LANGUAGE MultiWayIf #-}
1312{-# LANGUAGE RankNTypes #-}
1413{-# LANGUAGE RoleAnnotations #-}
1514{-# LANGUAGE ScopedTypeVariables #-}
@@ -20,6 +19,7 @@
2019{-# LANGUAGE DeriveFunctor #-}
2120{-# LANGUAGE StandaloneDeriving #-}
2221{-# LANGUAGE InstanceSigs #-}
22+{-# LANGUAGE MultiWayIf #-}
2323
2424#ifdef USE_REFLEX_OPTIMIZER
2525{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
@@ -38,7 +38,6 @@ import Control.Monad hiding (forM, forM_, mapM, mapM_)
3838import Control.Monad.Exception
3939import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
4040import Control.Monad.Primitive
41−--import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_)
4241import Control.Monad.Reader.Class
4342import Control.Monad.IO.Class
4443import Control.Monad.ReaderIO
@@ -47,8 +46,9 @@ import Control.Monad.Fail (MonadFail)
4746import qualified Control.Monad.Fail as MonadFail
4847import Data.Align
4948import Data.Coerce
50−import Data.Dependent.Map (DMap, DSum (..))
49+import Data.Dependent.Map (DMap)
5150import qualified Data.Dependent.Map as DMap
51+import Data.Dependent.Sum (DSum (..))
5252import Data.FastMutableIntMap (FastMutableIntMap, PatchIntMap (..))
5353import qualified Data.FastMutableIntMap as FastMutableIntMap
5454import Data.Foldable hiding (concat, elem, sequence_)
@@ -61,13 +61,13 @@ import qualified Data.IntMap.Strict as IntMap
6161import Data.IORef
6262import Data.Kind (Type)
6363import Data.Maybe hiding (mapMaybe)
64−import Data.Monoid ((<>))
64+import Data.Monoid (mempty, (<>))
6565import Data.Proxy
6666import Data.These
6767import Data.Traversable
6868import Data.Type.Equality ((:~:)(Refl))
6969import Data.Witherable (Filterable, mapMaybe)
70−import GHC.Exts
70+import GHC.Exts hiding (toList)
7171import GHC.IORef (IORef (..))
7272import GHC.Stack
7373import Reflex.FastWeak
@@ -86,14 +86,16 @@ import Data.Zip (Zip (..))
8686
8787#ifdef DEBUG_CYCLES
8888import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
89+#endif
90+
8991import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
9092import qualified Data.List.NonEmpty as NonEmpty
91−import Data.Monoid (mempty)
9293import Data.Tree (Forest, Tree (..), drawForest)
93−#endif
94+import Data.List (isPrefixOf)
9495
95−import Data.FastWeakBag (FastWeakBag)
96+import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
9697import qualified Data.FastWeakBag as FastWeakBag
98+
9799import Data.Reflection
98100import Data.Some (Some(Some))
99101import Data.Type.Coercion
@@ -104,21 +106,26 @@ import qualified Reflex.Class
104106import qualified Reflex.Class as R
105107import qualified Reflex.Host.Class
106108import Reflex.NotReady.Class
107−import Reflex.Patch
108−import qualified Reflex.Patch.DMapWithMove as PatchDMapWithMove
109+import Data.Patch
110+import qualified Data.Patch.DMapWithMove as PatchDMapWithMove
109111import Reflex.PerformEvent.Base (PerformEventT)
110112
111113#ifdef DEBUG_TRACE_EVENTS
112114import qualified Data.ByteString.Char8 as BS8
113115import System.IO (stderr)
116+import Data.List (isPrefixOf)
114117#endif
115118
116−#ifdef DEBUG_TRACE_EVENTS
119+-- TODO stdout might not be the best channel for debug output
120+debugStrLn :: String -> IO ()
121+debugStrLn = putStrLn
117122
123+#ifdef DEBUG_TRACE_EVENTS
118124withStackOneLine :: (BS8.ByteString -> a) -> a
119125withStackOneLine expr = unsafePerformIO $ do
120126 stack <- currentCallStack
121− return (expr (BS8.pack (unwords (reverse stack))))
127+ return (expr . BS8.pack . unwords . dropInternal . reverse $ stack)
128+ where dropInternal = filterStack "Reflex.Spider.Internal"
122129
123130#endif
124131
@@ -129,28 +136,42 @@ debugInvalidateHeight :: Bool
129136debugInvalidate :: Bool
130137
131138#ifdef DEBUG
132−
133139#define DEBUG_NODEIDS
134140
141+#ifdef DEBUG_TRACE_PROPAGATION
135142debugPropagate = True
143+#else
144+debugPropagate = False
145+#endif
136146
147+#ifdef DEBUG_TRACE_HEIGHT
148+debugInvalidateHeight = True
149+#else
137150debugInvalidateHeight = False
151+#endif
138152
153+#ifdef DEBUG_TRACE_INVALIDATION
139154debugInvalidate = True
155+#else
156+debugInvalidate = False
157+#endif
140158
141159class HasNodeId a where
142160 getNodeId :: a -> Int
143161
144−instance HasNodeId (Hold x p a) where
145− getNodeId = holdNodeId
162+instance HasNodeId (CacheSubscribed x a) where
163+ getNodeId = _cacheSubscribed_nodeId
146164
147−instance HasNodeId (PushSubscribed x a b) where
148− getNodeId = pushSubscribedNodeId
165+instance HasNodeId (FanInt x a) where
166+ getNodeId = _fanInt_nodeId
167+
168+instance HasNodeId (Hold x p) where
169+ getNodeId = holdNodeId
149170
150171instance HasNodeId (SwitchSubscribed x a) where
151172 getNodeId = switchSubscribedNodeId
152173
153−instance HasNodeId (FanSubscribed x a) where
174+instance HasNodeId (FanSubscribed x v a) where
154175 getNodeId = fanSubscribedNodeId
155176
156177instance HasNodeId (CoincidenceSubscribed x a) where
@@ -164,41 +185,16 @@ instance HasNodeId (Pull x a) where
164185
165186{-# INLINE showNodeId #-}
166187showNodeId :: HasNodeId a => a -> String
167−showNodeId = ("#"<>) . show . getNodeId
168−
169−showSubscriberType :: Subscriber x a -> String
170−showSubscriberType = \case
171− SubscriberPush _ _ -> "SubscriberPush"
172− SubscriberMerge _ _ -> "SubscriberMerge"
173− SubscriberFan _ -> "SubscriberFan"
174− SubscriberMergeChange _ -> "SubscriberMergeChange"
175− SubscriberHold _ -> "SubscriberHold"
176− SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
177− SubscriberSwitch _ -> "SubscriberSwitch"
178− SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
179− SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
180− SubscriberHandle -> "SubscriberHandle"
181−
182−showEventType :: Event x a -> String
183−showEventType = \case
184− EventRoot _ _ -> "EventRoot"
185− EventNever -> "EventNever"
186− EventPush _ -> "EventPush"
187− EventMerge _ -> "EventMerge"
188− EventFan _ _ -> "EventFan"
189− EventSwitch _ -> "EventSwitch"
190− EventCoincidence _ -> "EventCoincidence"
191− EventHold _ -> "EventHold"
192− EventDyn _ -> "EventDyn"
193− EventHoldIdentity _ -> "EventHoldIdentity"
194− EventDynIdentity _ -> "EventDynIdentity"
188+showNodeId = showNodeId' . getNodeId
189+
190+showNodeId' :: Int -> String
191+showNodeId' = ("#"<>) . show
192+
195193
196194#else
197195
198196debugPropagate = False
199−
200197debugInvalidateHeight = False
201−
202198debugInvalidate = False
203199
204200-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
@@ -206,6 +202,10 @@ debugInvalidate = False
206202showNodeId :: a -> String
207203showNodeId _ = ""
208204
205+{-# INLINE showNodeId' #-}
206+showNodeId' :: Int -> String
207+showNodeId' _ = ""
208+
209209#endif
210210
211211#ifdef DEBUG_NODEIDS
@@ -251,9 +251,9 @@ subscribeAndRead = unEvent
251251-- caching; if the computation function is very cheap, this is (much) more
252252-- efficient than 'push'
253253{-# INLINE [1] pushCheap #-}
254−pushCheap :: (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
254+pushCheap :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
255255pushCheap !f e = Event $ \sub -> do
256− (subscription, occ) <- subscribeAndRead e $ sub
256+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "push" $ sub
257257 { subscriberPropagate = \a -> do
258258 mb <- f a
259259 mapM_ (subscriberPropagate sub) mb
@@ -272,10 +272,10 @@ terminalSubscriber p = Subscriber
272272
273273-- | Subscribe to an Event only for the duration of one occurrence
274274{-# INLINE subscribeAndReadHead #-}
275−subscribeAndReadHead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
275+subscribeAndReadHead :: HasSpiderTimeline x => Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
276276subscribeAndReadHead e sub = do
277277 subscriptionRef <- liftIO $ newIORef $ error "subscribeAndReadHead: not initialized"
278− (subscription, occ) <- subscribeAndRead e $ sub
278+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "head" $ sub
279279 { subscriberPropagate = \a -> do
280280 liftIO $ unsubscribe =<< readIORef subscriptionRef
281281 subscriberPropagate sub a
@@ -286,24 +286,42 @@ subscribeAndReadHead e sub = do
286286 return (subscription, occ)
287287
288288--TODO: Make this lazy in its input event
289−headE :: (MonadIO m, Defer (SomeMergeInit x) m) => Event x a -> m (Event x a)
289+headE :: (MonadIO m, Defer (SomeMergeInit x) m, HasSpiderTimeline x) => Event x a -> m (Event x a)
290290headE originalE = do
291291 parent <- liftIO $ newIORef $ Just originalE
292292 defer $ SomeMergeInit $ do --TODO: Rename SomeMergeInit appropriately
293293 let clearParent = liftIO $ writeIORef parent Nothing
294− (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ \_ -> clearParent
294+ (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ const clearParent
295295 when (isJust occ) clearParent
296− return $ Event $ \sub -> do
296+ return $ Event $ \sub ->
297297 liftIO (readIORef parent) >>= \case
298− Nothing -> return (EventSubscription (return ()) $ EventSubscribed zeroRef $ toAny (), Nothing)
298+ Nothing -> subscribeAndReadNever
299299 Just e -> subscribeAndReadHead e sub
300300
301301data CacheSubscribed x a
302302 = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
303303 , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
304304 , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
305+#ifdef DEBUG_NODEIDS
306+ , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
307+#endif
305308 }
306309
310+nowSpiderEventM :: (HasSpiderTimeline x) => EventM x (R.Event (SpiderTimeline x) ())
311+nowSpiderEventM =
312+ SpiderEvent <$> now
313+
314+now :: (MonadIO m, Defer (Some Clear) m, HasSpiderTimeline x
315+ ) => m (Event x ())
316+now = do
317+ nowOrNot <- liftIO $ newIORef $ Just ()
318+ scheduleClear nowOrNot
319+ return . Event $ \_ -> do
320+ occ <- liftIO . readIORef $ nowOrNot
321+ return ( EventSubscription (return ()) eventSubscribedNow
322+ , occ
323+ )
324+
307325-- | Construct an 'Event' whose value is guaranteed not to be recomputed
308326-- repeatedly
309327--
@@ -328,18 +346,23 @@ cacheEvent e =
328346 subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
329347 Just subscribedTicket -> return subscribedTicket
330348 Nothing -> do
349+#ifdef DEBUG_NODEIDS
350+ nodeId <- liftIO newNodeId
351+#endif
331352 subscribers <- liftIO FastWeakBag.empty
332353 occRef <- liftIO $ newIORef Nothing -- This should never be read prior to being set below
354+#ifdef DEBUG_NODEIDS
355+ (parentSub, occ) <- subscribeAndRead e $ debugSubscriber' ("cacheEvent" <> showNodeId' nodeId) $ Subscriber
356+#else
333357 (parentSub, occ) <- subscribeAndRead e $ Subscriber
334− { subscriberPropagate = \a -> do
335− liftIO $ writeIORef occRef $ Just a
336− scheduleClear occRef
337− propagateFast a subscribers
338− , subscriberInvalidateHeight = \old -> do
339− FastWeakBag.traverse_ subscribers $ invalidateSubscriberHeight old
340− , subscriberRecalculateHeight = \new -> do
341− FastWeakBag.traverse_ subscribers $ recalculateSubscriberHeight new
342− }
358+#endif
359+ { subscriberPropagate = \a -> do
360+ liftIO $ writeIORef occRef (Just a)
361+ scheduleClear occRef
362+ propagateFast a subscribers
363+ , subscriberInvalidateHeight = FastWeakBag.traverse_ subscribers . invalidateSubscriberHeight
364+ , subscriberRecalculateHeight = FastWeakBag.traverse_ subscribers . recalculateSubscriberHeight
365+ }
343366 when (isJust occ) $ do
344367 liftIO $ writeIORef occRef occ -- Set the initial value of occRef; we don't need to do this if occ is Nothing
345368 scheduleClear occRef
@@ -347,29 +370,45 @@ cacheEvent e =
347370 { _cacheSubscribed_subscribers = subscribers
348371 , _cacheSubscribed_parent = parentSub
349372 , _cacheSubscribed_occurrence = occRef
373+#ifdef DEBUG_NODEIDS
374+ , _cacheSubscribed_nodeId = nodeId
375+#endif
350376 }
351377 subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
352378 liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
353379 return subscribedTicket
354− liftIO $ do
355− subscribed <- getFastWeakTicketValue subscribedTicket
356− ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
357− occ <- readIORef $ _cacheSubscribed_occurrence subscribed
358− let es = EventSubscription
359− { _eventSubscription_unsubscribe = do
360− FastWeakBag.remove ticket
361− isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
362− when isEmpty $ do
363− writeIORef mSubscribedRef emptyFastWeak
364− unsubscribe $ _cacheSubscribed_parent subscribed
365− touch ticket
366− touch subscribedTicket
367− , _eventSubscription_subscribed = EventSubscribed
368− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ _cacheSubscribed_parent subscribed
369− , eventSubscribedRetained = toAny subscribedTicket
370− }
371− }
372− return (es, occ)
380+ liftIO $ cacheSubscription sub mSubscribedRef subscribedTicket
381+
382+cacheSubscription :: Subscriber x a -> IORef (FastWeak (CacheSubscribed x a))
383+ -> FastWeakTicket (CacheSubscribed x a) -> IO (EventSubscription x, Maybe a)
384+cacheSubscription sub mSubscribedRef subscribedTicket = do
385+ subscribed <- getFastWeakTicketValue subscribedTicket
386+ ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
387+ occ <- readIORef $ _cacheSubscribed_occurrence subscribed
388+
389+ let parentSub = _cacheSubscribed_parent subscribed
390+ es = EventSubscription
391+ { _eventSubscription_unsubscribe = do
392+ FastWeakBag.remove ticket
393+
394+ isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
395+ when isEmpty $ do
396+ writeIORef mSubscribedRef emptyFastWeak
397+ unsubscribe parentSub
398+ touch ticket
399+ touch subscribedTicket
400+ , _eventSubscription_subscribed = EventSubscribed
401+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub
402+ , eventSubscribedRetained = toAny subscribedTicket
403+#ifdef DEBUG_CYCLES
404+ , eventSubscribedGetParents = return [_eventSubscription_subscribed parentSub]
405+ , eventSubscribedHasOwnHeightRef = False
406+ , eventSubscribedWhoCreated = whoCreatedIORef mSubscribedRef
407+#endif
408+ }
409+ }
410+ return (es, occ)
411+
373412
374413subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
375414subscribe e s = fst <$> subscribeAndRead e s
@@ -381,11 +420,14 @@ wrap tag getSpecificSubscribed sub = do
381420 let es = tag subd
382421 return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
383422
384−eventRoot :: GCompare k => k a -> Root x k -> Event x a
423+eventRoot :: (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Event x a
385424eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
386425
426+subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427+subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
428+
387429eventNever :: Event x a
388−eventNever = Event $ \_ -> return (EventSubscription (return ()) eventSubscribedNever, Nothing)
430+eventNever = Event $ const subscribeAndReadNever
389431
390432eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k v -> Event x (v a)
391433eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
@@ -422,16 +464,6 @@ data Subscriber x a = Subscriber
422464 , subscriberRecalculateHeight :: !(Height -> IO ())
423465 }
424466
425−--TODO: Move this comment to WeakBag
426−-- These function are constructor functions that are marked NOINLINE so they are
427−-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
428−-- so any weak references that are attached to the constructors will have their
429−-- finalizer run. Using the opaque constructor, does not see the
430−-- constructor application, so it behaves like an IORef and cannot be fused away.
431−--
432−-- The result is also evaluated to WHNF, since forcing a thunk invalidates
433−-- the weak pointer to it in some cases.
434−
435467newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
436468newSubscriberHold h = return $ Subscriber
437469 { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
@@ -440,10 +472,10 @@ newSubscriberHold h = return $ Subscriber
440472 }
441473
442474newSubscriberFan :: forall x k v. (HasSpiderTimeline x, GCompare k) => FanSubscribed x k v -> IO (Subscriber x (DMap k v))
443−newSubscriberFan subscribed = return $ Subscriber
475+newSubscriberFan subscribed = debugSubscriber ("SubscriberFan " <> showNodeId subscribed) $ Subscriber
444476 { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
445477 subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
446− tracePropagate (Proxy :: Proxy x) $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
478+ tracePropagate (Proxy :: Proxy x) $ show (DMap.size subs) <> " keys subscribed, " <> show (DMap.size a) <> " keys firing"
447479 liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
448480 scheduleClear $ fanSubscribedOccurrence subscribed
449481 let f _ (Pair v subsubs) = do
@@ -452,50 +484,40 @@ newSubscriberFan subscribed = return $ Subscriber
452484 _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
453485 return ()
454486 , subscriberInvalidateHeight = \old -> do
455− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
456487 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
457488 forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
458− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
459489 , subscriberRecalculateHeight = \new -> do
460− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
461490 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
462491 forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
463− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
464492 }
465493
466494newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
467−newSubscriberSwitch subscribed = return $ Subscriber
495+newSubscriberSwitch subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
468496 { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
469− tracePropagate (Proxy :: Proxy x) $ "SubscriberSwitch" <> showNodeId subscribed
470497 liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
471498 scheduleClear $ switchSubscribedOccurrence subscribed
472499 propagate a $ switchSubscribedSubscribers subscribed
473500 , subscriberInvalidateHeight = \_ -> do
474− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
475501 oldHeight <- readIORef $ switchSubscribedHeight subscribed
476502 when (oldHeight /= invalidHeight) $ do
477503 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
478504 WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
479− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
480− , subscriberRecalculateHeight = \new -> do
481− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
482− updateSwitchHeight new subscribed
483− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
484− }
505+ , subscriberRecalculateHeight = (`updateSwitchHeight` subscribed)
506+ }
485507
486508newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
487−newSubscriberCoincidenceOuter subscribed = return $ Subscriber
509+newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
488510 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
489− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
490511 outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
491512 tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
492513 (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
493514 tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
494515 tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
516+
495517 liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
496518 scheduleClear $ coincidenceSubscribedInnerParent subscribed
497519 case occ of
498− Nothing -> do
520+ Nothing ->
499521 when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
500522 writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
501523 WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
@@ -504,20 +526,13 @@ newSubscriberCoincidenceOuter subscribed = return $ Subscriber
504526 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
505527 scheduleClear $ coincidenceSubscribedOccurrence subscribed
506528 propagate o $ coincidenceSubscribedSubscribers subscribed
507− , subscriberInvalidateHeight = \_ -> do
508− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
509− invalidateCoincidenceHeight subscribed
510− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
511− , subscriberRecalculateHeight = \_ -> do
512− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
513− recalculateCoincidenceHeight subscribed
514− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
529+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
530+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
515531 }
516532
517533newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
518−newSubscriberCoincidenceInner subscribed = return $ Subscriber
534+newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
519535 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
520− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceInner" <> showNodeId subscribed
521536 occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
522537 case occ of
523538 Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
@@ -525,14 +540,8 @@ newSubscriberCoincidenceInner subscribed = return $ Subscriber
525540 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
526541 scheduleClear $ coincidenceSubscribedOccurrence subscribed
527542 propagate a $ coincidenceSubscribedSubscribers subscribed
528− , subscriberInvalidateHeight = \_ -> do
529− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
530− invalidateCoincidenceHeight subscribed
531− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
532− , subscriberRecalculateHeight = \_ -> do
533− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
534− recalculateCoincidenceHeight subscribed
535− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
543+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
536545 }
537546
538547invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
@@ -542,15 +551,15 @@ recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
542551recalculateSubscriberHeight = flip subscriberRecalculateHeight
543552
544553-- | Propagate everything at the current height
545−propagate :: a -> WeakBag (Subscriber x a) -> EventM x ()
546−propagate a subscribers = withIncreasedDepth $ do
554+propagate :: forall x a. HasSpiderTimeline x => a -> WeakBag (Subscriber x a) -> EventM x ()
555+propagate a subscribers = withIncreasedDepth (Proxy::Proxy x) $
547556 -- Note: in the following traversal, we do not visit nodes that are added to the list during our traversal; they are new events, which will necessarily have full information already, so there is no need to traverse them
548557 --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
549558 WeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
550559
551560-- | Propagate everything at the current height
552−propagateFast :: a -> FastWeakBag (Subscriber x a) -> EventM x ()
553−propagateFast a subscribers = withIncreasedDepth $ do
561+propagateFast :: forall x a. HasSpiderTimeline x => a -> FastWeakBag (Subscriber x a) -> EventM x ()
562+propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
554563 -- Note: in the following traversal, we do not visit nodes that are added to the list during our traversal; they are new events, which will necessarily have full information already, so there is no need to traverse them
555564 --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
556565 FastWeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
@@ -571,7 +580,7 @@ data EventSubscribed x = EventSubscribed
571580 { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
572581 , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
573582#ifdef DEBUG_CYCLES
574− , eventSubscribedGetParents :: !(IO [Some (EventSubscribed x)]) -- For debugging loops
583+ , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
575584 , eventSubscribedHasOwnHeightRef :: !Bool
576585 , eventSubscribedWhoCreated :: !(IO [String])
577586#endif
@@ -598,13 +607,23 @@ eventSubscribedNever = EventSubscribed
598607 , eventSubscribedWhoCreated = return ["never"]
599608#endif
600609 }
610+eventSubscribedNow :: EventSubscribed x
611+eventSubscribedNow = EventSubscribed
612+ { eventSubscribedHeightRef = zeroRef
613+ , eventSubscribedRetained = toAny ()
614+#ifdef DEBUG_CYCLES
615+ , eventSubscribedGetParents = return []
616+ , eventSubscribedHasOwnHeightRef = False
617+ , eventSubscribedWhoCreated = return ["now"]
618+#endif
619+ }
601620
602621eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
603622eventSubscribedFan !subscribed = EventSubscribed
604623 { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
605624 , eventSubscribedRetained = toAny subscribed
606625#ifdef DEBUG_CYCLES
607− , eventSubscribedGetParents = return [Some $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
626+ , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
608627 , eventSubscribedHasOwnHeightRef = False
609628 , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
610629#endif
@@ -617,7 +636,7 @@ eventSubscribedSwitch !subscribed = EventSubscribed
617636#ifdef DEBUG_CYCLES
618637 , eventSubscribedGetParents = do
619638 s <- readIORef $ switchSubscribedCurrentParent subscribed
620− return [Some $ _eventSubscription_subscribed s]
639+ return [_eventSubscription_subscribed s]
621640 , eventSubscribedHasOwnHeightRef = True
622641 , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
623642#endif
@@ -630,8 +649,8 @@ eventSubscribedCoincidence !subscribed = EventSubscribed
630649#ifdef DEBUG_CYCLES
631650 , eventSubscribedGetParents = do
632651 innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
633− let outerParent = Some $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
634− innerParents = maybeToList $ fmap Some innerSubscription
652+ let outerParent = _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
653+ innerParents = maybeToList $ innerSubscription
635654 return $ outerParent : innerParents
636655 , eventSubscribedHasOwnHeightRef = True
637656 , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
@@ -645,15 +664,15 @@ getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
645664whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
646665whoCreatedEventSubscribed = eventSubscribedWhoCreated
647666
648−walkInvalidHeightParents :: EventSubscribed x -> IO [Some (EventSubscribed x)]
667+walkInvalidHeightParents :: EventSubscribed x -> IO [EventSubscribed x]
649668walkInvalidHeightParents s0 = do
650− subscribers <- flip execStateT mempty $ ($ Some s0) $ fix $ \loop (Some s) -> do
669+ subscribers <- flip execStateT mempty $ ($ s0) $ fix $ \loop s -> do
651670 h <- liftIO $ readIORef $ eventSubscribedHeightRef s
652671 when (h == invalidHeight) $ do
653672 when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
654− modify (Some s :)
673+ modify (s :)
655674 mapM_ loop =<< liftIO (eventSubscribedGetParents s)
656− forM_ subscribers $ \(Some s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
675+ forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
657676 return subscribers
658677#endif
659678
@@ -1038,7 +1057,7 @@ data SomeMergeUpdate x = SomeMergeUpdate
10381057newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
10391058
10401059-- EventM can do everything BehaviorM can, plus create holds
1041−newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
1060+newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException)
10421061
10431062newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
10441063
@@ -1063,7 +1082,8 @@ heightBagFromList :: [Height] -> HeightBag
10631082heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
10641083
10651084heightBagAdd :: Height -> HeightBag -> HeightBag
1066−heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
1085+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $
1086+ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
10671087
10681088heightBagRemove :: Height -> HeightBag -> HeightBag
10691089heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
@@ -1072,6 +1092,13 @@ heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.loo
10721092 0 -> IntMap.delete h c
10731093 _ -> IntMap.insert h (pred old) c
10741094
1095+heightBagRemoveMaybe :: Height -> HeightBag -> Maybe HeightBag
1096+heightBagRemoveMaybe (Height h) b@(HeightBag s c) = heightBagVerify . removed <$> IntMap.lookup h c where
1097+ removed old = HeightBag (pred s) $ case old of
1098+ 0 -> IntMap.delete h c
1099+ _ -> IntMap.insert h (pred old) c
1100+
1101+
10751102heightBagMax :: HeightBag -> Height
10761103heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
10771104 Just ((h, _), _) -> Height h
@@ -1319,55 +1346,110 @@ mkWeakPtrWithDebug x debugNote = do
13191346 x' <- evaluate x
13201347 mkWeakPtr x' $
13211348 if debugFinalize
1322− then Just $ putStrLn $ "finalizing: " ++ debugNote
1349+ then Just $ debugStrLn $ "finalizing: " ++ debugNote
13231350 else Nothing
13241351
13251352type WeakList a = [Weak a]
13261353
1327−{-# INLINE withIncreasedDepth #-}
1354+type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
1355+
1356+
1357+
1358+
13281359#ifdef DEBUG
1329−withIncreasedDepth :: CanTrace x m => m a -> m a
1330−withIncreasedDepth a = do
1331− spiderTimeline <- askSpiderTimelineEnv
1332− liftIO $ modifyIORef' (_spiderTimeline_depth (unSTE spiderTimeline)) succ
1360+
1361+debugSubscriber :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> IO (Subscriber x a)
1362+debugSubscriber description = return . debugSubscriber' description
1363+
1364+debugSubscriber' :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> Subscriber x a
1365+debugSubscriber' description subscribed = Subscriber
1366+ {
1367+ subscriberPropagate = \m -> do
1368+ tracePropagate (Proxy :: Proxy x) ("subscriberPropagate: " <> description)
1369+ subscriberPropagate subscribed m
1370+ , subscriberInvalidateHeight = \old -> do
1371+ traceInvalidateHeight $ "invalidateSubscriberHeight: " <> description <> ", old = " <> show (unHeight old)
1372+ subscriberInvalidateHeight subscribed old
1373+ traceInvalidateHeight $ "invalidateSubscriberHeight: " <> description <> ", done"
1374+ , subscriberRecalculateHeight = \new -> do
1375+ traceInvalidateHeight $ "subscriberRecalculateHeight: " <> description <> ", new = " <> show (unHeight new)
1376+ subscriberRecalculateHeight subscribed new
1377+ traceInvalidateHeight $ "subscriberRecalculateHeight: " <> description <> ", done"
1378+ }
1379+
1380+
1381+{-# INLINE withIncreasedDepth #-}
1382+withIncreasedDepth :: forall proxy x m a. CanTrace x m => proxy x -> m a -> m a
1383+withIncreasedDepth _ a = do
1384+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) succ
13331385 result <- a
1334− liftIO $ modifyIORef' (_spiderTimeline_depth (unSTE spiderTimeline)) pred
1386+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
13351387 return result
1336−#else
1337−withIncreasedDepth :: m a -> m a
1338−withIncreasedDepth = id
1339−#endif
1340−
1341−type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
13421388
13431389{-# INLINE tracePropagate #-}
13441390tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1345−tracePropagate p = traceWhen p debugPropagate
1391+tracePropagate p = when debugPropagate . trace p
13461392
13471393{-# INLINE traceInvalidate #-}
13481394traceInvalidate :: String -> IO ()
1349−traceInvalidate = when debugInvalidate . liftIO . putStrLn
1395+traceInvalidate = when debugInvalidate . liftIO . debugStrLn
13501396
1351−{-# INLINE traceWhen #-}
1352−traceWhen :: (CanTrace x m) => proxy x -> Bool -> String -> m ()
1353−traceWhen p b message = traceMWhen p b $ return message
1397+{-# INLINE traceInvalidateHeight #-}
1398+traceInvalidateHeight :: String -> IO ()
1399+traceInvalidateHeight = when debugInvalidateHeight . liftIO . debugStrLn
13541400
1355−{-# INLINE traceMWhen #-}
1356−traceMWhen :: (CanTrace x m) => proxy x -> Bool -> m String -> m ()
1357−traceMWhen _ b getMessage = when b $ do
1401+{-# INLINE trace #-}
1402+trace :: (CanTrace x m) => proxy x -> String -> m ()
1403+trace p message = traceM p $ return message
1404+
1405+{-# INLINE traceM #-}
1406+traceM :: forall x proxy m. (CanTrace x m) => proxy x -> m String -> m ()
1407+traceM _ getMessage = do
13581408 message <- getMessage
1359−#ifdef DEBUG
1360− spiderTimeline <- askSpiderTimelineEnv
1361− d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE spiderTimeline
1409+ d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
1410+ liftIO $ debugStrLn $ replicate d ' ' <> message
1411+
13621412#else
1363− let d = 0
1413+
1414+{-# INLINE withIncreasedDepth #-}
1415+withIncreasedDepth :: proxy x -> m a -> m a
1416+withIncreasedDepth _ = id
1417+
1418+{-# INLINE tracePropagate #-}
1419+tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1420+tracePropagate _ _ = return ()
1421+
1422+{-# INLINE traceInvalidate #-}
1423+traceInvalidate :: String -> IO ()
1424+traceInvalidate _ = return ()
1425+
1426+{-# INLINE traceInvalidateHeight #-}
1427+traceInvalidateHeight :: String -> IO ()
1428+traceInvalidateHeight _ = return ()
1429+
1430+{-# INLINE debugSubscriber #-}
1431+debugSubscriber :: String -> Subscriber x a -> IO (Subscriber x a)
1432+debugSubscriber _ = return
1433+
1434+{-# INLINE debugSubscriber' #-}
1435+debugSubscriber' :: String -> Subscriber x a -> Subscriber x a
1436+debugSubscriber' _ = id
1437+
1438+
1439+
1440+{-# INLINE trace #-}
1441+trace :: (CanTrace x m) => proxy x -> String -> m ()
1442+trace _ _ = return ()
1443+
1444+{-# INLINE traceM #-}
1445+traceM :: (CanTrace x m) => proxy x -> m String -> m ()
1446+traceM _ _ = return ()
1447+
13641448#endif
1365− liftIO $ putStrLn $ replicate d ' ' <> message
13661449
13671450whoCreatedIORef :: IORef a -> IO [String]
13681451whoCreatedIORef (IORef a) = whoCreated $! a
13691452
1370−#ifdef DEBUG_CYCLES
13711453groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
13721454groupByHead = \case
13731455 [] -> []
@@ -1378,20 +1460,54 @@ groupByHead = \case
13781460 | otherwise -> (x, xs :| []) : l
13791461
13801462listsToForest :: Eq a => [[a]] -> Forest a
1381−listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
1463+listsToForest lists = buildForest <$> groupByHead (mapMaybe nonEmpty lists)
1464+ where buildForest (a, lists') = Node a $ listsToForest $ toList lists'
1465+
1466+showStacks :: [[String]] -> String
1467+showStacks = drawForest . listsToForest . fmap (filterStack "Reflex.Spider.Internal")
1468+
1469+filterStack :: String -> [String] -> [String]
1470+#ifdef DEBUG_HIDE_INTERNALS
1471+filterStack prefix = filter (not . (prefix `isPrefixOf`))
1472+#else
1473+filterStack prefix = id
13821474#endif
13831475
1476+#ifdef DEBUG_CYCLES
1477+
1478+data EventLoopException = EventLoopException [[String]]
1479+instance Exception EventLoopException
1480+
1481+instance Show EventLoopException where
1482+ show (EventLoopException stacks) = "causality loop detected:\n" <> if null stacks
1483+ then "no location information, compile with profiling enabled for stack tree"
1484+ else showStacks stacks
1485+
1486+#else
1487+
1488+data EventLoopException = EventLoopException
1489+instance Exception EventLoopException
1490+
1491+instance Show EventLoopException where
1492+ show EventLoopException = "causality loop detected: \n" <>
1493+ "compile reflex with flag 'debug-cycles' and compile with profiling enabled for stack tree"
1494+
1495+#endif
1496+
1497+
13841498{-# INLINE propagateSubscriberHold #-}
13851499propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
13861500propagateSubscriberHold h a = do
1387− {-# SCC "trace" #-} traceMWhen (Proxy :: Proxy x) debugPropagate $ liftIO $ do
1501+ {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
13881502 invalidators <- liftIO $ readIORef $ holdInvalidators h
13891503 return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1504+
13901505 v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
13911506 case {-# SCC "apply" #-} apply a v of
13921507 Nothing -> return ()
13931508 Just v' -> do
1394− {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate (Proxy :: Proxy x) $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
1509+ {-# SCC "trace2" #-} withIncreasedDepth (Proxy :: Proxy x) $
1510+ tracePropagate (Proxy :: Proxy x) ("propagateSubscriberHold: assigning Hold" <> showNodeId h)
13951511 vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
13961512 iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
13971513 defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
@@ -1445,7 +1561,7 @@ getDynHold d = do
14451561zeroRef :: IORef Height
14461562zeroRef = unsafePerformIO $ newIORef zeroHeight
14471563
1448−getRootSubscribed :: GCompare k => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket, RootSubscribed x a, Maybe a)
1564+getRootSubscribed :: forall k x a. (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket, RootSubscribed x a, Maybe a)
14491565getRootSubscribed k r sub = do
14501566 mSubscribed <- readIORef $ rootSubscribed r
14511567 let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
@@ -1459,7 +1575,9 @@ getRootSubscribed k r sub = do
14591575 let !cached = rootSubscribed r
14601576 uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
14611577 (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1462− when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
1578+
1579+ tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
1580+
14631581 uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
14641582 writeIORef uninitRef $! uninit
14651583#ifdef DEBUG_NODEIDS
@@ -1509,6 +1627,9 @@ data FanInt x a = FanInt
15091627 { _fanInt_subscribers :: {-# UNPACK #-} !(FastMutableIntMap (FastWeakBag (Subscriber x a))) --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
15101628 , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
15111629 , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
1630+#ifdef DEBUG_NODEIDS
1631+ , _fanInt_nodeId :: {-# UNPACK #-} !Int
1632+#endif
15121633 }
15131634
15141635newFanInt :: IO (FanInt x a)
@@ -1516,10 +1637,16 @@ newFanInt = do
15161637 subscribers <- FastMutableIntMap.newEmpty --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
15171638 subscriptionRef <- newIORef $ error "fanInt: no subscription"
15181639 occRef <- newIORef $ error "fanInt: no occurrence"
1640+#ifdef DEBUG_NODEIDS
1641+ nodeId <- newNodeId
1642+#endif
15191643 return $ FanInt
15201644 { _fanInt_subscribers = subscribers
15211645 , _fanInt_subscriptionRef = subscriptionRef
15221646 , _fanInt_occRef = occRef
1647+#ifdef DEBUG_NODEIDS
1648+ , _fanInt_nodeId = nodeId
1649+#endif
15231650 }
15241651
15251652fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
@@ -1528,20 +1655,21 @@ fanInt p = unsafePerformIO $ do
15281655 pure $ EventSelectorInt $ \k -> Event $ \sub -> do
15291656 isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
15301657 when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1531− (subscription, parentOcc) <- subscribeAndRead p $ Subscriber
1658+ let desc = "fanInt" <> showNodeId self <> ", k = " <> show k
1659+ (subscription, parentOcc) <- subscribeAndRead p $ debugSubscriber' desc $ Subscriber
15321660 { subscriberPropagate = \m -> do
15331661 liftIO $ writeIORef (_fanInt_occRef self) m
15341662 scheduleIntClear $ _fanInt_occRef self
1535− FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> do --TODO: Do we need to know that no subscribers are being added as we traverse?
1536− FastWeakBag.traverse_ b $ \s -> do
1663+ FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> --TODO: Do we need to know that no subscribers are being added as we traverse?
1664+ FastWeakBag.traverse_ b $ \s ->
15371665 subscriberPropagate s v
1538− , subscriberInvalidateHeight = \old -> do
1539− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b -> do
1540− FastWeakBag.traverse_ b $ \s -> do
1666+ , subscriberInvalidateHeight = \old ->
1667+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1668+ FastWeakBag.traverse_ b $ \s ->
15411669 subscriberInvalidateHeight s old
1542− , subscriberRecalculateHeight = \new -> do
1543− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b -> do
1544− FastWeakBag.traverse_ b $ \s -> do
1670+ , subscriberRecalculateHeight = \new ->
1671+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1672+ FastWeakBag.traverse_ b $ \s ->
15451673 subscriberRecalculateHeight s new
15461674 }
15471675 liftIO $ do
@@ -1555,10 +1683,25 @@ fanInt p = unsafePerformIO $ do
15551683 FastMutableIntMap.insert (_fanInt_subscribers self) k b
15561684 return b
15571685 Just b -> return b
1558− t <- liftIO $ FastWeakBag.insert sub b
1686+ ticket <- liftIO $ FastWeakBag.insert sub b
15591687 currentOcc <- readIORef (_fanInt_occRef self)
1560− (EventSubscription _ (EventSubscribed !heightRef _)) <- readIORef (_fanInt_subscriptionRef self)
1561− return (EventSubscription (FastWeakBag.remove t) $! EventSubscribed heightRef $! toAny (_fanInt_subscriptionRef self, t), IntMap.lookup k currentOcc)
1688+
1689+ subscribed <- fanIntSubscribed ticket self
1690+ return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
1691+
1692+fanIntSubscribed :: FastWeakBagTicket k -> FanInt x a -> IO (EventSubscribed x)
1693+fanIntSubscribed ticket self = do
1694+ subscribedParent <- _eventSubscription_subscribed <$> readIORef (_fanInt_subscriptionRef self)
1695+ return $ EventSubscribed
1696+ { eventSubscribedHeightRef = eventSubscribedHeightRef subscribedParent
1697+ , eventSubscribedRetained = toAny (_fanInt_subscriptionRef self, ticket)
1698+#ifdef DEBUG_CYCLES
1699+ , eventSubscribedGetParents = return [subscribedParent]
1700+ , eventSubscribedHasOwnHeightRef = False
1701+ , eventSubscribedWhoCreated = whoCreatedIORef $ _fanInt_subscriptionRef self
1702+#endif
1703+ }
1704+
15621705
15631706{-# INLINABLE getFanSubscribed #-}
15641707getFanSubscribed :: (HasSpiderTimeline x, GCompare k) => k a -> Fan x k v -> Subscriber x (v a) -> EventM x (WeakBagTicket, FanSubscribed x k v, Maybe (v a))
@@ -1756,7 +1899,7 @@ mergeCheap
17561899 => (forall a. q a -> Event x (v a))
17571900 -> DynamicS x (PatchDMap k q)
17581901 -> Event x (DMap k v)
1759−mergeCheap nt = mergeGCheap' getInitialSubscribers updateMe destroy
1902+mergeCheap nt = mergeGCheap' unMergeSubscribedParent getInitialSubscribers updateMe destroy
17601903 where
17611904 updateMe :: MergeUpdateFunc k v x (PatchDMap k q) (MergeSubscribedParent x)
17621905 updateMe subscriber heightBagRef oldParents (PatchDMap p) = do
@@ -1771,7 +1914,9 @@ mergeCheap nt = mergeGCheap' getInitialSubscribers updateMe destroy
17711914 liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
17721915 return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
17731916 forM_ mOldSubd $ \oldSubd -> do
1774− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1917+ oldHeight <- liftIO $ getEventSubscribedHeight $
1918+ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1919+
17751920 liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
17761921 return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
17771922 foldM f ([], oldParents) $ DMap.toList p
@@ -1796,7 +1941,7 @@ mergeCheapWithMove :: forall k x v q. (HasSpiderTimeline x, GCompare k)
17961941 => (forall a. q a -> Event x (v a))
17971942 -> DynamicS x (PatchDMapWithMove k q)
17981943 -> Event x (DMap k v)
1799−mergeCheapWithMove nt = mergeGCheap' getInitialSubscribers updateMe destroy
1944+mergeCheapWithMove nt = mergeGCheap' _mergeSubscribedParentWithMove_subscription getInitialSubscribers updateMe destroy
18001945 where
18011946 updateMe :: MergeUpdateFunc k v x (PatchDMapWithMove k q) (MergeSubscribedParentWithMove x k)
18021947 updateMe subscriber heightBagRef oldParents p = do
@@ -1815,13 +1960,17 @@ mergeCheapWithMove nt = mergeGCheap' getInitialSubscribers updateMe destroy
18151960 let moveOrDelete :: forall a. k a -> PatchDMapWithMove.NodeInfo k q a -> MergeSubscribedParentWithMove x k a -> Constant (EventM x (Maybe (EventSubscription x))) a
18161961 moveOrDelete _ ni parent = Constant $ case getComposeMaybe $ PatchDMapWithMove._nodeInfo_to ni of
18171962 Nothing -> do
1818− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ _mergeSubscribedParentWithMove_subscription parent
1963+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $
1964+ _mergeSubscribedParentWithMove_subscription parent
1965+
18191966 liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
18201967 return $ Just $ _mergeSubscribedParentWithMove_subscription parent
18211968 Just toKey -> do
18221969 liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
18231970 return Nothing
1824− toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1971+ toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $
1972+ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1973+
18251974 return (toDelete, applyAlways p' oldParents)
18261975 getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParentWithMove x k)
18271976 getInitialSubscribers initialParents subscriber = do
@@ -1846,6 +1995,8 @@ type MergeUpdateFunc k v x p s
18461995 -> p
18471996 -> EventM x ([EventSubscription x], DMap k s)
18481997
1998+type MergeGetSubscription x s = forall a. s a -> EventSubscription x
1999+
18492000type MergeInitFunc k v q x s
18502001 = DMap k q
18512002 -> (forall a. EventM x (k a) -> Subscriber x (v a))
@@ -1869,14 +2020,17 @@ invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_su
18692020invalidateMergeHeight' :: IORef Height -> Subscriber x a -> IO ()
18702021invalidateMergeHeight' heightRef sub = do
18712022 oldHeight <- readIORef heightRef
1872− when (oldHeight /= invalidHeight) $ do -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
2023+ -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
2024+ when (oldHeight /= invalidHeight) $ do
18732025 writeIORef heightRef $! invalidHeight
18742026 subscriberInvalidateHeight sub oldHeight
18752027
18762028revalidateMergeHeight :: Merge x k v s -> IO ()
18772029revalidateMergeHeight m = do
18782030 currentHeight <- readIORef $ _merge_heightRef m
1879− when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
2031+
2032+ -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
2033+ when (currentHeight == invalidHeight) $ do
18802034 heights <- readIORef $ _merge_heightBagRef m
18812035 parents <- readIORef $ _merge_parentsRef m
18822036 -- When the number of heights in the bag reaches the number of parents, we should have a valid height
@@ -1884,7 +2038,7 @@ revalidateMergeHeight m = do
18842038 LT -> return ()
18852039 EQ -> do
18862040 let height = succHeight $ heightBagMax heights
1887− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
2041+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
18882042 writeIORef (_merge_heightRef m) $! height
18892043 subscriberRecalculateHeight (_merge_sub m) height
18902044 GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show (DMap.size parents) <> ") for Merge"
@@ -1892,36 +2046,45 @@ revalidateMergeHeight m = do
18922046scheduleMergeSelf :: HasSpiderTimeline x => Merge x k v s -> Height -> EventM x ()
18932047scheduleMergeSelf m height = scheduleMerge' height (_merge_heightRef m) $ do
18942048 vals <- liftIO $ readIORef $ _merge_accumRef m
1895− liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us, it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
2049+ -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us,
2050+ -- it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
2051+ liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty
18962052 --TODO: Assert that m is not empty
18972053 subscriberPropagate (_merge_sub m) vals
18982054
1899−mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
1900−mergeSubscriber m getKey = Subscriber
2055+checkCycle :: HasSpiderTimeline x => EventSubscribed x -> EventM x ()
2056+checkCycle subscribed = liftIO $ do
2057+ height <- readIORef (eventSubscribedHeightRef subscribed)
2058+
2059+ -- currentHeight <- getCurrentHeight
2060+ -- when (height <= currentHeight) $ if height /= invalidHeight
2061+ -- then do
2062+ -- myStack <- liftIO $ whoCreatedIORef undefined --TODO
2063+ -- error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
2064+ -- else liftIO $
2065+ when (height == invalidHeight) $
2066+#ifdef DEBUG_CYCLES
2067+ do
2068+ nodesInvolvedInCycle <- walkInvalidHeightParents subscribed
2069+ stacks <- forM nodesInvolvedInCycle whoCreatedEventSubscribed
2070+ throwIO (EventLoopException stacks)
2071+#else
2072+ throwIO EventLoopException
2073+#endif
2074+
2075+
2076+mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
2077+mergeSubscriber subscribed m getKey = Subscriber
19012078 { subscriberPropagate = \a -> do
19022079 oldM <- liftIO $ readIORef $ _merge_accumRef m
19032080 k <- getKey
1904− let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge") k a oldM
2081+ let newM = DMap.insertWith (error "Same key fired multiple times for Merge") k a oldM
19052082 tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
19062083 liftIO $ writeIORef (_merge_accumRef m) $! newM
19072084 when (DMap.null oldM) $ do -- Only schedule the firing once
19082085 height <- liftIO $ readIORef $ _merge_heightRef m
1909− --TODO: assertions about height
1910− currentHeight <- getCurrentHeight
1911− when (height <= currentHeight) $ do
1912− if height /= invalidHeight
1913− then do
1914− myStack <- liftIO $ whoCreatedIORef undefined --TODO
1915− error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
1916− else liftIO $ do
1917−#ifdef DEBUG_CYCLES
1918− nodesInvolvedInCycle <- walkInvalidHeightParents $ eventSubscribedMerge subscribed
1919− stacks <- forM nodesInvolvedInCycle $ \(Some es) -> whoCreatedEventSubscribed es
1920− let cycleInfo = ":\n" <> drawForest (listsToForest stacks)
1921−#else
1922− let cycleInfo = ""
1923−#endif
1924− error $ "Causality loop found" <> cycleInfo
2086+ checkCycle subscribed
2087+
19252088 scheduleMergeSelf m height
19262089 , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
19272090 modifyIORef' (_merge_heightBagRef m) $ heightBagRemove old
@@ -1932,31 +2095,45 @@ mergeSubscriber m getKey = Subscriber
19322095 }
19332096
19342097--TODO: Be able to run as much of this as possible promptly
1935−updateMerge :: (HasSpiderTimeline x, GCompare k) => Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
1936−updateMerge m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
2098+updateMerge :: (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
2099+updateMerge subscribed m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
19372100 where updateMe = do
19382101 oldParents <- liftIO $ readIORef $ _merge_parentsRef m
1939− (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber m) (_merge_heightBagRef m) oldParents p
2102+ (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber subscribed m) (_merge_heightBagRef m) oldParents p
19402103 liftIO $ writeIORef (_merge_parentsRef m) $! newParents
19412104 return subscriptionsToKill
19422105
19432106{-# INLINE mergeGCheap' #-}
19442107mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
1945− => MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
1946−mergeGCheap' getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
2108+ => MergeGetSubscription x s -> MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
2109+mergeGCheap' getParent getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
19472110 initialParents <- readBehaviorUntracked $ dynamicCurrent d
19482111 accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
19492112 heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
19502113 heightBagRef <- liftIO $ newIORef $ error "merge: heightBagRef not yet initialized"
19512114 parentsRef :: IORef (DMap k s) <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
1952− let m = Merge
2115+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2116+
2117+ let subscribed = EventSubscribed
2118+ { eventSubscribedHeightRef = heightRef
2119+ , eventSubscribedRetained = toAny (parentsRef, changeSubdRef)
2120+#ifdef DEBUG_CYCLES
2121+ , eventSubscribedGetParents = do
2122+ let getParent' (_ :=> v) = _eventSubscription_subscribed (getParent v)
2123+ fmap getParent' . DMap.toList <$> readIORef parentsRef
2124+ , eventSubscribedHasOwnHeightRef = False
2125+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2126+#endif
2127+ }
2128+
2129+ m = Merge
19532130 { _merge_parentsRef = parentsRef
19542131 , _merge_heightBagRef = heightBagRef
19552132 , _merge_heightRef = heightRef
19562133 , _merge_sub = sub
19572134 , _merge_accumRef = accumRef
19582135 }
1959− (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber m
2136+ (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber subscribed m
19602137 let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
19612138 myHeight = if invalidHeight `elem` heights
19622139 then invalidHeight
@@ -1965,31 +2142,29 @@ mergeGCheap' getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
19652142 let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
19662143 then (if DMap.null dm then Nothing else Just dm, DMap.empty)
19672144 else (Nothing, dm)
1968− unless (DMap.null accum) $ do
1969− scheduleMergeSelf m myHeight
2145+ unless (DMap.null accum) $ scheduleMergeSelf m myHeight
19702146 liftIO $ writeIORef accumRef $! accum
19712147 liftIO $ writeIORef heightRef $! myHeight
19722148 liftIO $ writeIORef heightBagRef $! myHeightBag
1973− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
19742149 liftIO $ writeIORef parentsRef $! initialParentState
19752150 defer $ SomeMergeInit $ do
1976− let s = Subscriber
2151+ let changeSubscriber = Subscriber
19772152 { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
1978− tracePropagate (Proxy :: Proxy x) $ "SubscriberMerge/Change"
1979− defer $ updateMerge m updateFunc a
2153+ tracePropagate (Proxy :: Proxy x) "SubscriberMerge/Change"
2154+ defer $ updateMerge subscribed m updateFunc a
19802155 , subscriberInvalidateHeight = \_ -> return ()
19812156 , subscriberRecalculateHeight = \_ -> return ()
19822157 }
1983− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) s
1984− forM_ change $ \c -> defer $ updateMerge m updateFunc c
2158+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2159+ forM_ change $ \c -> defer $ updateMerge subscribed m updateFunc c
19852160 -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
19862161 -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
19872162 -- its subscription.
1988− liftIO $ writeIORef changeSubdRef (s, changeSubscription)
2163+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
19892164 let unsubscribeAll = destroy =<< readIORef parentsRef
1990− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parentsRef, changeSubdRef)
1991− , occ
1992− )
2165+
2166+ return (EventSubscription unsubscribeAll subscribed, occ)
2167+
19932168
19942169mergeInt :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
19952170mergeInt = cacheEvent . mergeIntCheap
@@ -2002,13 +2177,22 @@ mergeIntCheap d = Event $ \sub -> do
20022177 heightRef <- liftIO $ newIORef zeroHeight
20032178 heightBagRef <- liftIO $ newIORef heightBagEmpty
20042179 parents <- liftIO $ FastMutableIntMap.newEmpty
2180+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2181+ let subscribed = EventSubscribed
2182+ { eventSubscribedHeightRef = heightRef
2183+ , eventSubscribedRetained = toAny (parents, changeSubdRef)
2184+#ifdef DEBUG_CYCLES
2185+ , eventSubscribedGetParents = fmap (_eventSubscription_subscribed . snd) <$> FastMutableIntMap.toList parents
2186+ , eventSubscribedHasOwnHeightRef = False
2187+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2188+#endif
2189+ }
20052190 let scheduleSelf = do
20062191 height <- liftIO $ readIORef $ heightRef
20072192 scheduleMerge' height heightRef $ do
20082193 vals <- liftIO $ FastMutableIntMap.getFrozenAndClear accum
20092194 subscriberPropagate sub vals
2010− invalidateMyHeight = do
2011− invalidateMergeHeight' heightRef sub
2195+ invalidateMyHeight = invalidateMergeHeight' heightRef sub
20122196 recalculateMyHeight = do
20132197 currentHeight <- readIORef heightRef
20142198 when (currentHeight == invalidHeight) $ do --TODO: This will almost always be true; can we get rid of this check and just proceed to the next one always?
@@ -2018,12 +2202,14 @@ mergeIntCheap d = Event $ \sub -> do
20182202 LT -> return ()
20192203 EQ -> do
20202204 let height = succHeight $ heightBagMax heights
2021− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
2205+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
20222206 writeIORef heightRef $! height
20232207 subscriberRecalculateHeight sub height
20242208 GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
20252209 mySubscriber k = Subscriber
20262210 { subscriberPropagate = \a -> do
2211+ checkCycle subscribed
2212+
20272213 wasEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
20282214 liftIO $ FastMutableIntMap.insert accum k a
20292215 when wasEmpty scheduleSelf
@@ -2057,7 +2243,6 @@ mergeIntCheap d = Event $ \sub -> do
20572243 else liftIO $ Just <$> FastMutableIntMap.getFrozenAndClear accum
20582244 else do when (not isEmpty) scheduleSelf -- We have things accumulated, but we shouldn't have fired them yet
20592245 return Nothing
2060− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
20612246 defer $ SomeMergeInit $ do
20622247 let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
20632248 where
@@ -2071,25 +2256,27 @@ mergeIntCheap d = Event $ \sub -> do
20712256 oldParents <- liftIO $ FastMutableIntMap.applyPatch parents newSubscriptions
20722257 liftIO $ for_ oldParents $ \oldParent -> do
20732258 oldParentHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed oldParent
2259+
2260+ print ("updateMe", oldParentHeight)
20742261 modifyIORef' heightBagRef $ heightBagRemove oldParentHeight
20752262 return $ IntMap.elems oldParents
2076− let s = Subscriber
2263+ let changeSubscriber = Subscriber
20772264 { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
20782265 tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
20792266 defer $ updateMe a
20802267 , subscriberInvalidateHeight = \_ -> return ()
20812268 , subscriberRecalculateHeight = \_ -> return ()
20822269 }
2083− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) s
2270+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
20842271 forM_ change $ \c -> defer $ updateMe c
20852272 -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
20862273 -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
20872274 -- its subscription.
2088− liftIO $ writeIORef changeSubdRef (s, changeSubscription)
2275+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
20892276 let unsubscribeAll = traverse_ unsubscribe =<< FastMutableIntMap.getFrozenAndClear parents
2090− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parents, changeSubdRef)
2091− , occ
2092− )
2277+
2278+
2279+ return (EventSubscription unsubscribeAll subscribed, occ)
20932280
20942281newtype EventSelector x k = EventSelector { select :: forall a. k a -> Event x a }
20952282newtype EventSelectorG x k v = EventSelectorG { selectG :: forall a. k a -> Event x (v a) }
@@ -2172,19 +2359,19 @@ runFrame a = SpiderHost $ do
21722359 coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
21732360 forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
21742361 writeIORef vRef v
2175− when debugInvalidate $ putStrLn $ "Invalidating Hold"
2362+ traceInvalidate $ "Invalidating Hold"
21762363 writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
21772364 mergeUpdates <- readIORef $ eventEnvMergeUpdates env
21782365 writeIORef (eventEnvMergeUpdates env) []
2179− when debugPropagate $ putStrLn "Updating merges"
2366+ tracePropagate (Proxy::Proxy x) $ "Updating merges"
21802367 mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2181− when debugPropagate $ putStrLn "Updating merges done"
2368+ tracePropagate (Proxy::Proxy x) $ "Updating merges done"
21822369 toReconnect <- readIORef toReconnectRef
21832370 clearEventEnv env
21842371 switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
21852372 oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
21862373 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2187− when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
2374+ traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
21882375 finalize wi
21892376 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
21902377 wi' <- mkWeakPtrWithDebug i "wi'"
@@ -2198,7 +2385,7 @@ runFrame a = SpiderHost $ do
21982385 subscription <- unSpiderHost $ runFrame $ {-# SCC "subscribeSwitch" #-} subscribe e sub --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
21992386 {-
22002387 stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
2201− liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
2388+ liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
22022389 EventRoot _ -> "EventRoot"
22032390 EventNever -> "EventNever"
22042391 _ -> "something else"
@@ -2333,6 +2520,8 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Event
23332520 {-# INLINABLE headE #-}
23342521 headE = R.slowHeadE
23352522-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
2523+ {-# INLINABLE now #-}
2524+ now = nowSpiderEventM
23362525
23372526instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
23382527 {-# INLINABLE sample #-}
@@ -2354,6 +2543,9 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Spide
23542543 {-# INLINABLE headE #-}
23552544 headE = R.slowHeadE
23562545-- headE (SpiderEvent e) = SpiderPushM $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2546+ {-# INLINABLE now #-}
2547+ now = SpiderPushM nowSpiderEventM
2548+
23572549
23582550instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
23592551 {-# INLINE return #-}
@@ -2417,6 +2609,9 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Spide
24172609 buildDynamic getV0 e = runFrame . runSpiderHostFrame $ Reflex.Class.buildDynamic getV0 e
24182610 {-# INLINABLE headE #-}
24192611 headE e = runFrame . runSpiderHostFrame $ Reflex.Class.headE e
2612+ {-# INLINABLE now #-}
2613+ now = runFrame . runSpiderHostFrame $ Reflex.Class.now
2614+
24202615
24212616instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHostFrame x) where
24222617 sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
@@ -2433,6 +2628,8 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Spide
24332628 {-# INLINABLE headE #-}
24342629 headE = R.slowHeadE
24352630-- headE (SpiderEvent e) = SpiderHostFrame $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2631+ {-# INLINABLE now #-}
2632+ now = SpiderHostFrame Reflex.Class.now
24362633
24372634instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
24382635 {-# INLINABLE sample #-}
@@ -2453,6 +2650,8 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Refle
24532650 buildDynamic getV0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.buildDynamic getV0 e
24542651 {-# INLINABLE headE #-}
24552652 headE e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.headE e
2653+ {-# INLINABLE now #-}
2654+ now = Reflex.Spider.Internal.ReadPhase Reflex.Class.now
24562655
24572656--------------------------------------------------------------------------------
24582657-- Deprecated items
@@ -2490,13 +2689,13 @@ instance HasSpiderTimeline x => Reflex.Host.Class.MonadReadEvent (SpiderTimeline
24902689 touch h
24912690 return result
24922691
2493−instance Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
2692+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
24942693 newEventWithTrigger = SpiderHost . fmap SpiderEvent . newEventWithTriggerIO
24952694 newFanEventWithTrigger f = SpiderHost $ do
24962695 es <- newFanEventWithTriggerIO f
24972696 return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
24982697
2499−instance Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
2698+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
25002699 newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
25012700 newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
25022701 es <- newFanEventWithTriggerIO f
@@ -2576,7 +2775,7 @@ instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
25762775 fanG e = R.EventSelectorG $ SpiderEvent . selectG (fanG (unSpiderEvent e))
25772776 {-# INLINABLE mergeG #-}
25782777 mergeG
2579− :: forall (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2778+ :: forall k2 (k :: k2 -> *) q (v :: k2 -> *). GCompare k
25802779 => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
25812780 -> DMap k q
25822781 -> R.Event (SpiderTimeline x) (DMap k v)
@@ -2682,12 +2881,12 @@ instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
26822881 notReadyUntil _ = pure ()
26832882 notReady = pure ()
26842883
2685−newEventWithTriggerIO :: (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
2884+newEventWithTriggerIO :: forall x a. HasSpiderTimeline x => (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
26862885newEventWithTriggerIO f = do
26872886 es <- newFanEventWithTriggerIO $ \Refl -> f
26882887 return $ select es Refl
26892888
2690−newFanEventWithTriggerIO :: GCompare k => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
2889+newFanEventWithTriggerIO :: (HasSpiderTimeline x, GCompare k) => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
26912890newFanEventWithTriggerIO f = do
26922891 occRef <- newIORef DMap.empty
26932892 subscribedRef <- newIORef DMap.empty
@@ -2728,4 +2927,4 @@ instance NotReady (SpiderTimeline x) (SpiderHost x) where
27282927
27292928instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x)) where
27302929 notReadyUntil _ = return ()
2731− notReady = return ()
2930+ notReady = return ()
src/Reflex/TriggerEvent/Base.hs+2
@@ -122,6 +122,8 @@ instance MonadHold t m => MonadHold t (TriggerEventT t m) where
122122 buildDynamic a0 = lift . buildDynamic a0
123123 {-# INLINABLE headE #-}
124124 headE = lift . headE
125+ {-# INLINABLE now #-}
126+ now = lift now
125127
126128instance Adjustable t m => Adjustable t (TriggerEventT t m) where
127129 {-# INLINABLE runWithReplace #-}
src/Reflex/TriggerEvent/Class.hs+6
@@ -12,6 +12,7 @@ import Reflex.Class
1212import Control.Monad.Reader
1313import Control.Monad.State
1414import qualified Control.Monad.State.Strict as Strict
15+import Control.Monad.Trans.Maybe (MaybeT)
1516
1617--TODO: Shouldn't have IO hard-coded
1718-- | 'TriggerEvent' represents actions that can create 'Event's that can be
@@ -47,3 +48,8 @@ instance TriggerEvent t m => TriggerEvent t (Strict.StateT s m) where
4748 newTriggerEvent = lift newTriggerEvent
4849 newTriggerEventWithOnComplete = lift newTriggerEventWithOnComplete
4950 newEventWithLazyTriggerWithOnComplete = lift . newEventWithLazyTriggerWithOnComplete
51+
52+instance TriggerEvent t m => TriggerEvent t (MaybeT m) where
53+ newTriggerEvent = lift newTriggerEvent
54+ newTriggerEventWithOnComplete = lift newTriggerEventWithOnComplete
55+ newEventWithLazyTriggerWithOnComplete = lift . newEventWithLazyTriggerWithOnComplete
src/Reflex/Widget/Basic.hs+1−1
@@ -13,7 +13,7 @@ import Data.Map (Map)
1313
1414import Reflex.Class
1515import Reflex.Adjustable.Class
16−import Reflex.Patch.MapWithMove
16+import Data.Patch.MapWithMove
1717
1818
1919-- | Build sortable content in such a way that re-sorting it can cause minimal
test/Adjustable.hsnew file+62
@@ -0,0 +1,62 @@
1+{-# LANGUAGE BangPatterns #-}
2+{-# LANGUAGE LambdaCase #-}
3+{-# LANGUAGE RankNTypes #-}
4+{-# LANGUAGE RecursiveDo #-}
5+
6+module Main where
7+
8+import Control.Monad.Fix
9+import Data.Maybe
10+import qualified Data.Map as Map
11+
12+import Reflex
13+import Reflex.EventWriter.Base
14+import Reflex.Network
15+import Reflex.Patch.MapWithMove
16+import Test.Run
17+
18+main :: IO ()
19+main = do
20+ let actions = [ Increment, Update0th, Increment, Swap, Increment, Increment ]
21+ os <- runAppB testPatchMapWithMove $ map Just actions
22+ -- If the final counter value in the adjusted widgets corresponds to the number of times it has
23+ -- been incremented, we know that the networks haven't broken.
24+ let expectedCount = length $ ffilter (== Increment) actions
25+ -- let !True = last (last os) == [expectedCount,expectedCount] -- TODO re-enable this test after issue #369 has been resolved
26+ return ()
27+
28+data PatchMapTestAction
29+ = Increment
30+ | Swap
31+ | Update0th
32+ deriving Eq
33+
34+-- See https://github.com/reflex-frp/reflex/issues/369 for the bug that this is testing.
35+testPatchMapWithMove
36+ :: forall t m
37+ . ( Reflex t
38+ , Adjustable t m
39+ , MonadHold t m
40+ , MonadFix m
41+ )
42+ => Event t PatchMapTestAction
43+ -> m (Behavior t [Int])
44+testPatchMapWithMove pulse = do
45+ let pulseAction = ffor pulse $ \case
46+ Increment -> Nothing
47+ Swap -> patchMapWithMove $ Map.fromList
48+ [ (0, NodeInfo (From_Move 1) (Just 1))
49+ , (1, NodeInfo (From_Move 0) (Just 0))
50+ ]
51+ Update0th -> patchMapWithMove $ Map.fromList
52+ [ (0, NodeInfo (From_Insert 'z') Nothing) ]
53+ (_, result) <- runBehaviorWriterT $ mdo
54+ counter <- foldDyn (+) 1 $ fmapMaybe (\e -> if isNothing e then Just 1 else Nothing) pulseAction
55+ _ <- mapMapWithAdjustWithMove
56+ (\_ _ -> networkHold
57+ (tellBehavior $ constant [])
58+ ((\t -> tellBehavior $ constant [t]) <$> updated counter))
59+ (Map.fromList $ zip [0..] "ab")
60+ (fmapMaybe id pulseAction)
61+ return ()
62+ return result
test/DebugCycles.hsnew file+171
@@ -0,0 +1,171 @@
1+{-# LANGUAGE CPP #-}
2+{-# LANGUAGE ConstraintKinds #-}
3+{-# LANGUAGE FlexibleContexts #-}
4+{-# LANGUAGE GADTs #-}
5+{-# LANGUAGE RecursiveDo #-}
6+{-# LANGUAGE ScopedTypeVariables #-}
7+{-# LANGUAGE PatternSynonyms #-}
8+{-# LANGUAGE RankNTypes #-}
9+
10+module Main where
11+
12+import Data.Foldable
13+import Control.Lens
14+import Control.Applicative
15+import Control.Monad
16+import Control.Monad.Fix
17+import Control.Exception
18+import System.Timeout
19+import Data.Maybe (isJust)
20+import Data.Functor.Misc
21+import qualified Data.Map as Map
22+import Data.Map (Map)
23+import qualified Data.IntMap as IntMap
24+import Data.IntMap (IntMap)
25+import Data.These
26+import Data.Align
27+import Reflex
28+import Reflex.EventWriter.Base
29+import Test.Run
30+import Test.Hspec
31+import Reflex.Spider.Internal (EventLoopException)
32+import Data.Witherable (Filterable)
33+
34+#if defined(MIN_VERSION_these_lens) || (MIN_VERSION_these(0,8,0) && !MIN_VERSION_these(0,9,0))
35+import Data.These.Lens
36+#endif
37+
38+type Widget t m = (MonadHold t m, Reflex t, MonadFix m)
39+
40+connectDyn :: Widget t m => Event t () -> (Dynamic t a, Dynamic t a) -> m (Dynamic t a)
41+connectDyn e (d, d') = do
42+ dd <- holdDyn d (d' <$ e)
43+ return $ join dd
44+
45+dynLoop :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
46+dynLoop (e1, e2) = do
47+ -- "heightBagRemove: Height 2 not present in bag HeightBag {_heightBag_size = 2, _heightBag_contents = fromList [(0,1)]}"
48+ rec
49+ d <- count e1
50+ d' <- connectDyn e2 (d, liftA2 (+) d d')
51+ return $ updated d'
52+
53+connectOnCoincidence :: Widget t m => Event t () -> Event t a -> m (Event t a)
54+connectOnCoincidence click e = do
55+ d <- holdDyn never (e <$ click)
56+ return $ coincidence (updated d)
57+
58+coincidenceLoop :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
59+coincidenceLoop (e1, e2) = do
60+-- "heightBagRemove: Height 1 not present in bag HeightBag {_heightBag_size = 1, _heightBag_contents = fromList [(0,0)]}"
61+-- (simpler version of dynLoop)
62+ rec
63+ e' <- connectOnCoincidence e2 (updated d)
64+ d <- count (align e' e1)
65+ return $ updated d
66+
67+addHeight :: Reflex t => Event t a -> Event t a
68+addHeight e = leftmost [e4, e4] where
69+ e1 = leftmost [e, e]
70+ e2 = leftmost [e1, e1]
71+ e3 = leftmost [e2, e2]
72+ e4 = leftmost [e3, e3]
73+
74+-- Take an existing test and build it inside a
75+buildLoop :: Widget t m => (forall t m. Widget t m => (Event t Int, Event t ()) -> m (Event t Int)) -> (Event t Int, Event t ()) -> m (Event t Int)
76+buildLoop test (e1, e2) = switchHold never buildLoop
77+ where buildLoop = pushAlways (const $ test (e1, e2)) e2
78+
79+connectButtonPromptly :: Widget t m => Event t () -> Event t a -> m (Event t a)
80+connectButtonPromptly click e = do
81+ d <- holdDyn never (e <$ click)
82+ return (switchDyn d)
83+
84+connectButton :: Widget t m => Event t () -> Event t a -> m (Event t a)
85+connectButton click e = do
86+ d <- hold never (e <$ click)
87+ return (switch d)
88+
89+switchLoop01 :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
90+switchLoop01 (e1, e2) = do
91+ rec
92+ e' <- connectButton e2 (updated d)
93+ d <- count (align e' e1)
94+ return $ updated d
95+
96+mergeLoop :: forall t m. (Adjustable t m, Widget t m) => (Event t Int, Event t ()) -> m (Event t Int)
97+mergeLoop (e1, e2) = do
98+ rec
99+ (_, e) <- runEventWriterT $
100+ runWithReplace w (leftmost [w <$ e1])
101+ return (sum <$> e)
102+ where
103+ w = do
104+ c <- count e1
105+ tellEvent (updated ((pure <$> c) :: Dynamic t [Int]))
106+
107+switchLoop02 :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
108+switchLoop02 (e1, e2) = do
109+ rec
110+ e' <- connectButton e2 (updated d)
111+ d <- count (leftmost [e', e1])
112+ return $ updated d
113+
114+switchLoop03 :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
115+switchLoop03 (e1, e2) = do
116+ rec
117+ e' <- connectButton e2 (addHeight $ updated d)
118+ d <- count (align e' e1)
119+ return $ updated d
120+
121+staticLoop01 :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
122+staticLoop01 (e1, e2) = do
123+ rec
124+ d <- foldDyn (+) (0 :: Int) (1 <$ align e1 (updated d))
125+ return $ updated d
126+
127+staticLoop02 :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
128+staticLoop02 (e1, e2) = do
129+ rec
130+ d <- foldDyn (+) (0 :: Int) (leftmost [e1, updated d])
131+ return $ updated d
132+
133+buildStaticLoop :: Widget t m => (Event t Int, Event t ()) -> m (Event t Int)
134+buildStaticLoop (e1, e2) = switchHold never buildLoop
135+ where buildLoop = pushAlways (const $ staticLoop01 (e1, e2)) e2
136+
137+splitThese :: Filterable f => f (These a b) -> (f a, f b)
138+splitThese f = (mapMaybe (preview here) f, mapMaybe (preview there) f)
139+
140+main :: IO ()
141+main = hspec $ do
142+ describe "DebugCycles" $ do
143+ it "throws EventLoopException on switchLoop01" $ do
144+ check switchLoop01
145+ it "throws EventLoopException on switchLoop02" $ do
146+ check switchLoop02
147+ it "throws EventLoopException on switchLoop03" $ do
148+ check switchLoop03
149+ it "throws EventLoopException on buildSwitchLoop" $ do
150+ check $ buildLoop switchLoop01
151+ xit "throws EventLoopException on mergeLoop" $ do
152+ check mergeLoop
153+ xit "throws EventLoopException on staticLoop01" $ do
154+ check staticLoop01
155+ xit "throws EventLoopException on staticLoop02" $ do
156+ check staticLoop02
157+ xit "throws EventLoopException on buildStaticLoop" $ do
158+ check buildStaticLoop
159+ xit "throws EventLoopException on coincidenceLoop" $ do
160+ check coincidenceLoop
161+ xit "throws EventLoopException on dynLoop" $ do
162+ check dynLoop
163+ xit "throws EventLoopException on buildCoincidenceLoop" $ do
164+ check $ buildLoop coincidenceLoop
165+ where
166+ milliseconds = (*1000)
167+ occs = [ This 1, This 2, That (), This 3, That (), This 1 ]
168+ check test = do
169+ let action = timeout (milliseconds 50) $ do
170+ runApp' (test . splitThese) (Just <$> occs)
171+ action `shouldThrow` (const True :: Selector EventLoopException)
test/GC.hs+2−2
@@ -18,9 +18,10 @@ import Data.GADT.Compare
1818import Data.IORef
1919import Data.Semigroup
2020import Data.These
21+import Data.Type.Equality ((:~:)(Refl))
2122
2223import Data.Functor.Misc
23−import Reflex.Patch
24+import Data.Patch
2425
2526import qualified Reflex.Host.Class as Host
2627import qualified Reflex.Spider.Internal as S
@@ -83,7 +84,6 @@ hostPerf ref = S.runSpiderHost $ do
8384 Nothing -> []
8485 Host.fireEventsAndRead followupEventTriggers $ return ()
8586 return ()
86− return ()
8787
8888data Tell a where
8989 Action :: Tell ()
test/Headless.hsnew file+10
@@ -0,0 +1,10 @@
1+module Main where
2+
3+import Reflex
4+import Reflex.Host.Headless (runHeadlessApp)
5+
6+main :: IO ()
7+main = do
8+ runHeadlessApp $ do
9+ pb <- getPostBuild
10+ performEvent (pure <$> pb)
test/QueryT.hs+1−1
@@ -24,7 +24,7 @@ import Data.These.Lens
2424#endif
2525
2626import Reflex
27−import Reflex.Patch.MapWithMove
27+import Data.Patch.MapWithMove
2828import Test.Run
2929
3030newtype MyQuery = MyQuery SelectedCount
test/Reflex/Plan/Pure.hs+1
@@ -41,6 +41,7 @@ instance MonadHold (Pure Int) PurePlan where
4141 holdIncremental initial = liftPlan . holdIncremental initial
4242 buildDynamic getInitial = liftPlan . buildDynamic getInitial
4343 headE = liftPlan . headE
44+ now = liftPlan now
4445
4546instance MonadSample (Pure Int) PurePlan where
4647 sample = liftPlan . sample
test/Reflex/Test/CrossImpl.hs+13−8
@@ -21,11 +21,12 @@ import Reflex.Dynamic
2121import Reflex.Host.Class
2222import qualified Reflex.Pure as P
2323import qualified Reflex.Spider.Internal as S
24+import qualified Reflex.Profiled as Prof
2425
2526import Control.Arrow (second, (&&&))
2627import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_, sequence, sequence_)
2728import Control.Monad.State.Strict hiding (forM, forM_, mapM, mapM_, sequence, sequence_)
28−import Data.Dependent.Map (DSum (..))
29+import Data.Dependent.Sum (DSum (..))
2930import Data.Foldable
3031import Data.Map.Strict (Map)
3132import qualified Data.Map.Strict as Map
@@ -35,8 +36,6 @@ import Data.Traversable
3536import System.Exit
3637import System.Mem
3738
38−import System.IO.Unsafe
39−
4039mapToPureBehavior :: Map Int a -> Behavior PureReflexDomain a
4140mapToPureBehavior m = P.Behavior $ \t -> case Map.lookupLE t m of
4241 Nothing -> error $ "mapToPureBehavior: no value for time " <> show t
@@ -73,11 +72,14 @@ instance MapMSignals (Event t a) (Event t' a) t t' where
7372instance (MapMSignals a a' t t', MapMSignals b b' t t') => MapMSignals (a, b) (a', b') t t' where
7473 mapMSignals fb fe (a, b) = liftM2 (,) (mapMSignals fb fe a) (mapMSignals fb fe b)
7574
76−testSpider :: (forall m t. TestCaseConstraint t m => (Behavior t a, Event t b) -> m (Behavior t c, Event t d)) -> (Map Int a, Map Int b) -> (Map Int c, Map Int d)
77−testSpider builder (bMap, eMap) = unsafePerformIO $ S.runSpiderHost $ do
75+testTimeline
76+ :: (forall m t. TestCaseConstraint t m => (Behavior t a, Event t b) -> m (Behavior t c, Event t d))
77+ -> (Map Int a, Map Int b)
78+ -> (forall m t. (MonadReflexHost t m, MonadIO m, MonadRef m, Ref m ~ Ref IO, MonadSample t m) => m (Map Int c, Map Int d))
79+testTimeline builder (bMap, eMap) = do
7880 (re, reTrigger) <- newEventWithTriggerRef
7981 (rb, rbTrigger) <- newEventWithTriggerRef
80− b <- runHostFrame $ hold (error "testSpider: No value for input behavior yet") rb
82+ b <- runHostFrame $ hold (error "testTimeline: No value for input behavior yet") rb
8183 (b', e') <- runHostFrame $ builder (b, re)
8284 e'Handle <- subscribeEvent e' --TODO: This should be unnecessary
8385 let times = relevantTestingTimes (bMap, eMap)
@@ -102,9 +104,11 @@ testAgreement :: (Eq c, Eq d, Show c, Show d) => (forall m t. TestCaseConstraint
102104testAgreement builder inputs = do
103105 let identityResult = testPure builder inputs
104106 tracePerf "---------" $ return ()
105− let spiderResult = testSpider builder inputs
107+ spiderResult <- S.runSpiderHost $ testTimeline builder inputs
108+ tracePerf "---------" $ return ()
109+ profiledResult <- S.runSpiderHost $ Prof.runProfiledM $ testTimeline builder inputs
106110 tracePerf "---------" $ return ()
107− let resultsAgree = identityResult == spiderResult
111+ let resultsAgree = identityResult == spiderResult && identityResult == profiledResult
108112 if resultsAgree
109113 then do --putStrLn "Success:"
110114 --print identityResult
@@ -112,6 +116,7 @@ testAgreement builder inputs = do
112116 else do putStrLn "Failure:"
113117 putStrLn $ "Pure result: " <> show identityResult
114118 putStrLn $ "Spider result: " <> show spiderResult
119+ putStrLn $ "Profiled result: " <> show profiledResult
115120 return resultsAgree
116121
117122type TestCaseConstraint t m = (Reflex t, MonadSample t m, MonadHold t m, MonadFix m, MonadFix (PushM t))
test/Reflex/Test/Micro.hs+8−2
@@ -322,8 +322,14 @@ testCases =
322322 let e = never <$ switch b
323323 return $ void e
324324 lazyHold
325−
326−
325+ , testE "now-1" $ do
326+ e1 <- events1
327+ switchHoldPromptly never . pushAlways (\a -> fmap (a <$) now) $ e1
328+ , testE "now-2" $ do
329+ e1 <- events1
330+ let e = pushAlways (\a -> if a == "a" then now else return never) e1
331+ x <- accumDyn (<>) never e
332+ return . coincidence $ updated x
327333 ] where
328334
329335 events1, events2, events3 :: TestPlan t m => m (Event t String)
test/RequesterT.hs+63−2
@@ -1,20 +1,36 @@
11{-# LANGUAGE CPP #-}
22{-# LANGUAGE BangPatterns #-}
33{-# LANGUAGE FlexibleContexts #-}
4+{-# LANGUAGE FlexibleInstances #-}
45{-# LANGUAGE GADTs #-}
5−{-# LANGUAGE RankNTypes #-}
6+{-# LANGUAGE LambdaCase #-}
7+{-# LANGUAGE MultiParamTypeClasses #-}
68{-# LANGUAGE RecursiveDo #-}
79{-# LANGUAGE ScopedTypeVariables #-}
10+{-# LANGUAGE TemplateHaskell #-}
11+{-# LANGUAGE TypeApplications #-}
12+{-# LANGUAGE TypeFamilies #-}
813module Main where
914
10−import Control.Lens
15+import Control.Lens hiding (has)
1116import Control.Monad
1217import Control.Monad.Fix
18+import Control.Monad.IO.Class (MonadIO)
19+import Data.Constraint.Extras
20+import Data.Constraint.Extras.TH
21+import Data.Constraint.Forall
1322import qualified Data.Dependent.Map as DMap
1423import Data.Dependent.Sum
1524import Data.Functor.Misc
25+import Data.List (words)
26+import Data.Map (Map)
1627import qualified Data.Map as M
28+#if !MIN_VERSION_these(4,11,0)
29+import Data.Semigroup ((<>))
30+#endif
31+import Data.Text (Text)
1732import Data.These
33+import Text.Read (readMaybe)
1834
1935#if defined(MIN_VERSION_these_lens) || (MIN_VERSION_these(0,8,0) && !MIN_VERSION_these(0,9,0))
2036import Data.These.Lens
@@ -49,12 +65,19 @@ main = do
4965 print os5
5066 os6 <- runApp' (unwrapApp delayedPulse) [Just ()]
5167 print os6
68+ os7 <- runApp' testMatchRequestsWithResponses [ Just $ TestRequest_Increment 1 ]
69+ print os7
70+ os8 <- runApp' testMatchRequestsWithResponses [ Just $ TestRequest_Reverse "yoyo" ]
71+ print os8
5272 let ![[Just [1,2,3,4,5,6,7,8,9,10]]] = os1 -- The order is reversed here: see the documentation for 'runRequesterT'
5373 let ![[Just [9,7,5,3,1]],[Nothing,Nothing],[Just [10,8,6,4,2]],[Just [10,8,6,4,2],Nothing]] = os2
5474 let ![[Nothing, Just [2]]] = os3
5575 let ![[Nothing, Just [2]]] = os4
5676 let ![[Nothing, Just [1, 2]]] = os5
5777 -- let ![[Nothing, Nothing]] = os6 -- TODO re-enable this test after issue #233 has been resolved
78+ let !(Just [(1,"2")]) = M.toList <$> head (head os7)
79+ let !(Just [(1,"oyoy")]) = M.toList <$> head (head os8)
80+
5881 return ()
5982
6083unwrapRequest :: DSum tag RequestInt -> Int
@@ -172,3 +195,41 @@ delayedPulse pulse = void $ flip runWithReplace (pure () <$ pulse) $ do
172195 -- This has the effect of delaying pulse' from pulse
173196 (_, pulse') <- runWithReplace (pure ()) $ pure (RequestInt 1) <$ pulse
174197 requestingIdentity pulse'
198+
199+data TestRequest a where
200+ TestRequest_Reverse :: String -> TestRequest String
201+ TestRequest_Increment :: Int -> TestRequest Int
202+
203+testMatchRequestsWithResponses
204+ :: forall m t req a
205+ . ( MonadFix m
206+ , MonadHold t m
207+ , Reflex t
208+ , PerformEvent t m
209+ , MonadIO (Performable m)
210+ , ForallF Show req
211+ , Has Read req
212+ )
213+ => Event t (req a) -> m (Event t (Map Int String))
214+testMatchRequestsWithResponses pulse = mdo
215+ (_, requests) <- runRequesterT (requesting pulse) responses
216+ let rawResponses = M.map (\v ->
217+ case words v of
218+ ["reverse", str] -> reverse str
219+ ["increment", i] -> show $ succ $ (read i :: Int)
220+ ) <$> rawRequestMap
221+ (rawRequestMap, responses) <- matchResponsesWithRequests reqEncoder requests (head . M.toList <$> rawResponses)
222+ pure rawResponses
223+ where
224+ reqEncoder :: forall a. req a -> (String, String -> Maybe a)
225+ reqEncoder r =
226+ ( whichever @Show @req @a $ show r
227+ , \x -> has @Read r $ readMaybe x
228+ )
229+
230+deriveArgDict ''TestRequest
231+
232+instance Show (TestRequest a) where
233+ show = \case
234+ TestRequest_Reverse str -> "reverse " <> str
235+ TestRequest_Increment i -> "increment " <> show i
test/hlint.hs+2−1
@@ -1,7 +1,7 @@
11module Main where
22
33import Control.Monad
4−import Language.Haskell.HLint3 (hlint)
4+import Language.Haskell.HLint (hlint)
55import System.Directory
66import System.Exit (exitFailure, exitSuccess)
77import System.FilePath
@@ -22,6 +22,7 @@ main = do
2222 , "--ignore=Use unless"
2323 , "--ignore=Reduce duplication"
2424 , "--cpp-define=USE_TEMPLATE_HASKELL"
25+ , "--cpp-define=DEBUG"
2526 , "--ignore=Use tuple-section"
2627 ]
2728 recurseInto = and <$> sequence