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LICENSE
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LICENSE
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Mozilla Public License Version 2.0
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||||||
|
==================================
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|
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|
1. Definitions
|
||||||
|
--------------
|
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|
|
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|
1.1. "Contributor"
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|
means each individual or legal entity that creates, contributes to
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|
the creation of, or owns Covered Software.
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||||||
|
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|
1.2. "Contributor Version"
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|
means the combination of the Contributions of others (if any) used
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|
by a Contributor and that particular Contributor's Contribution.
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|
|
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|
1.3. "Contribution"
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|
means Covered Software of a particular Contributor.
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|
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|
1.4. "Covered Software"
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||||||
|
means Source Code Form to which the initial Contributor has attached
|
||||||
|
the notice in Exhibit A, the Executable Form of such Source Code
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|
Form, and Modifications of such Source Code Form, in each case
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|
including portions thereof.
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||||||
|
|
||||||
|
1.5. "Incompatible With Secondary Licenses"
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||||||
|
means
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||||||
|
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||||||
|
(a) that the initial Contributor has attached the notice described
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||||||
|
in Exhibit B to the Covered Software; or
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||||||
|
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||||||
|
(b) that the Covered Software was made available under the terms of
|
||||||
|
version 1.1 or earlier of the License, but not also under the
|
||||||
|
terms of a Secondary License.
|
||||||
|
|
||||||
|
1.6. "Executable Form"
|
||||||
|
means any form of the work other than Source Code Form.
|
||||||
|
|
||||||
|
1.7. "Larger Work"
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||||||
|
means a work that combines Covered Software with other material, in
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||||||
|
a separate file or files, that is not Covered Software.
|
||||||
|
|
||||||
|
1.8. "License"
|
||||||
|
means this document.
|
||||||
|
|
||||||
|
1.9. "Licensable"
|
||||||
|
means having the right to grant, to the maximum extent possible,
|
||||||
|
whether at the time of the initial grant or subsequently, any and
|
||||||
|
all of the rights conveyed by this License.
|
||||||
|
|
||||||
|
1.10. "Modifications"
|
||||||
|
means any of the following:
|
||||||
|
|
||||||
|
(a) any file in Source Code Form that results from an addition to,
|
||||||
|
deletion from, or modification of the contents of Covered
|
||||||
|
Software; or
|
||||||
|
|
||||||
|
(b) any new file in Source Code Form that contains any Covered
|
||||||
|
Software.
|
||||||
|
|
||||||
|
1.11. "Patent Claims" of a Contributor
|
||||||
|
means any patent claim(s), including without limitation, method,
|
||||||
|
process, and apparatus claims, in any patent Licensable by such
|
||||||
|
Contributor that would be infringed, but for the grant of the
|
||||||
|
License, by the making, using, selling, offering for sale, having
|
||||||
|
made, import, or transfer of either its Contributions or its
|
||||||
|
Contributor Version.
|
||||||
|
|
||||||
|
1.12. "Secondary License"
|
||||||
|
means either the GNU General Public License, Version 2.0, the GNU
|
||||||
|
Lesser General Public License, Version 2.1, the GNU Affero General
|
||||||
|
Public License, Version 3.0, or any later versions of those
|
||||||
|
licenses.
|
||||||
|
|
||||||
|
1.13. "Source Code Form"
|
||||||
|
means the form of the work preferred for making modifications.
|
||||||
|
|
||||||
|
1.14. "You" (or "Your")
|
||||||
|
means an individual or a legal entity exercising rights under this
|
||||||
|
License. For legal entities, "You" includes any entity that
|
||||||
|
controls, is controlled by, or is under common control with You. For
|
||||||
|
purposes of this definition, "control" means (a) the power, direct
|
||||||
|
or indirect, to cause the direction or management of such entity,
|
||||||
|
whether by contract or otherwise, or (b) ownership of more than
|
||||||
|
fifty percent (50%) of the outstanding shares or beneficial
|
||||||
|
ownership of such entity.
|
||||||
|
|
||||||
|
2. License Grants and Conditions
|
||||||
|
--------------------------------
|
||||||
|
|
||||||
|
2.1. Grants
|
||||||
|
|
||||||
|
Each Contributor hereby grants You a world-wide, royalty-free,
|
||||||
|
non-exclusive license:
|
||||||
|
|
||||||
|
(a) under intellectual property rights (other than patent or trademark)
|
||||||
|
Licensable by such Contributor to use, reproduce, make available,
|
||||||
|
modify, display, perform, distribute, and otherwise exploit its
|
||||||
|
Contributions, either on an unmodified basis, with Modifications, or
|
||||||
|
as part of a Larger Work; and
|
||||||
|
|
||||||
|
(b) under Patent Claims of such Contributor to make, use, sell, offer
|
||||||
|
for sale, have made, import, and otherwise transfer either its
|
||||||
|
Contributions or its Contributor Version.
|
||||||
|
|
||||||
|
2.2. Effective Date
|
||||||
|
|
||||||
|
The licenses granted in Section 2.1 with respect to any Contribution
|
||||||
|
become effective for each Contribution on the date the Contributor first
|
||||||
|
distributes such Contribution.
|
||||||
|
|
||||||
|
2.3. Limitations on Grant Scope
|
||||||
|
|
||||||
|
The licenses granted in this Section 2 are the only rights granted under
|
||||||
|
this License. No additional rights or licenses will be implied from the
|
||||||
|
distribution or licensing of Covered Software under this License.
|
||||||
|
Notwithstanding Section 2.1(b) above, no patent license is granted by a
|
||||||
|
Contributor:
|
||||||
|
|
||||||
|
(a) for any code that a Contributor has removed from Covered Software;
|
||||||
|
or
|
||||||
|
|
||||||
|
(b) for infringements caused by: (i) Your and any other third party's
|
||||||
|
modifications of Covered Software, or (ii) the combination of its
|
||||||
|
Contributions with other software (except as part of its Contributor
|
||||||
|
Version); or
|
||||||
|
|
||||||
|
(c) under Patent Claims infringed by Covered Software in the absence of
|
||||||
|
its Contributions.
|
||||||
|
|
||||||
|
This License does not grant any rights in the trademarks, service marks,
|
||||||
|
or logos of any Contributor (except as may be necessary to comply with
|
||||||
|
the notice requirements in Section 3.4).
|
||||||
|
|
||||||
|
2.4. Subsequent Licenses
|
||||||
|
|
||||||
|
No Contributor makes additional grants as a result of Your choice to
|
||||||
|
distribute the Covered Software under a subsequent version of this
|
||||||
|
License (see Section 10.2) or under the terms of a Secondary License (if
|
||||||
|
permitted under the terms of Section 3.3).
|
||||||
|
|
||||||
|
2.5. Representation
|
||||||
|
|
||||||
|
Each Contributor represents that the Contributor believes its
|
||||||
|
Contributions are its original creation(s) or it has sufficient rights
|
||||||
|
to grant the rights to its Contributions conveyed by this License.
|
||||||
|
|
||||||
|
2.6. Fair Use
|
||||||
|
|
||||||
|
This License is not intended to limit any rights You have under
|
||||||
|
applicable copyright doctrines of fair use, fair dealing, or other
|
||||||
|
equivalents.
|
||||||
|
|
||||||
|
2.7. Conditions
|
||||||
|
|
||||||
|
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
|
||||||
|
in Section 2.1.
|
||||||
|
|
||||||
|
3. Responsibilities
|
||||||
|
-------------------
|
||||||
|
|
||||||
|
3.1. Distribution of Source Form
|
||||||
|
|
||||||
|
All distribution of Covered Software in Source Code Form, including any
|
||||||
|
Modifications that You create or to which You contribute, must be under
|
||||||
|
the terms of this License. You must inform recipients that the Source
|
||||||
|
Code Form of the Covered Software is governed by the terms of this
|
||||||
|
License, and how they can obtain a copy of this License. You may not
|
||||||
|
attempt to alter or restrict the recipients' rights in the Source Code
|
||||||
|
Form.
|
||||||
|
|
||||||
|
3.2. Distribution of Executable Form
|
||||||
|
|
||||||
|
If You distribute Covered Software in Executable Form then:
|
||||||
|
|
||||||
|
(a) such Covered Software must also be made available in Source Code
|
||||||
|
Form, as described in Section 3.1, and You must inform recipients of
|
||||||
|
the Executable Form how they can obtain a copy of such Source Code
|
||||||
|
Form by reasonable means in a timely manner, at a charge no more
|
||||||
|
than the cost of distribution to the recipient; and
|
||||||
|
|
||||||
|
(b) You may distribute such Executable Form under the terms of this
|
||||||
|
License, or sublicense it under different terms, provided that the
|
||||||
|
license for the Executable Form does not attempt to limit or alter
|
||||||
|
the recipients' rights in the Source Code Form under this License.
|
||||||
|
|
||||||
|
3.3. Distribution of a Larger Work
|
||||||
|
|
||||||
|
You may create and distribute a Larger Work under terms of Your choice,
|
||||||
|
provided that You also comply with the requirements of this License for
|
||||||
|
the Covered Software. If the Larger Work is a combination of Covered
|
||||||
|
Software with a work governed by one or more Secondary Licenses, and the
|
||||||
|
Covered Software is not Incompatible With Secondary Licenses, this
|
||||||
|
License permits You to additionally distribute such Covered Software
|
||||||
|
under the terms of such Secondary License(s), so that the recipient of
|
||||||
|
the Larger Work may, at their option, further distribute the Covered
|
||||||
|
Software under the terms of either this License or such Secondary
|
||||||
|
License(s).
|
||||||
|
|
||||||
|
3.4. Notices
|
||||||
|
|
||||||
|
You may not remove or alter the substance of any license notices
|
||||||
|
(including copyright notices, patent notices, disclaimers of warranty,
|
||||||
|
or limitations of liability) contained within the Source Code Form of
|
||||||
|
the Covered Software, except that You may alter any license notices to
|
||||||
|
the extent required to remedy known factual inaccuracies.
|
||||||
|
|
||||||
|
3.5. Application of Additional Terms
|
||||||
|
|
||||||
|
You may choose to offer, and to charge a fee for, warranty, support,
|
||||||
|
indemnity or liability obligations to one or more recipients of Covered
|
||||||
|
Software. However, You may do so only on Your own behalf, and not on
|
||||||
|
behalf of any Contributor. You must make it absolutely clear that any
|
||||||
|
such warranty, support, indemnity, or liability obligation is offered by
|
||||||
|
You alone, and You hereby agree to indemnify every Contributor for any
|
||||||
|
liability incurred by such Contributor as a result of warranty, support,
|
||||||
|
indemnity or liability terms You offer. You may include additional
|
||||||
|
disclaimers of warranty and limitations of liability specific to any
|
||||||
|
jurisdiction.
|
||||||
|
|
||||||
|
4. Inability to Comply Due to Statute or Regulation
|
||||||
|
---------------------------------------------------
|
||||||
|
|
||||||
|
If it is impossible for You to comply with any of the terms of this
|
||||||
|
License with respect to some or all of the Covered Software due to
|
||||||
|
statute, judicial order, or regulation then You must: (a) comply with
|
||||||
|
the terms of this License to the maximum extent possible; and (b)
|
||||||
|
describe the limitations and the code they affect. Such description must
|
||||||
|
be placed in a text file included with all distributions of the Covered
|
||||||
|
Software under this License. Except to the extent prohibited by statute
|
||||||
|
or regulation, such description must be sufficiently detailed for a
|
||||||
|
recipient of ordinary skill to be able to understand it.
|
||||||
|
|
||||||
|
5. Termination
|
||||||
|
--------------
|
||||||
|
|
||||||
|
5.1. The rights granted under this License will terminate automatically
|
||||||
|
if You fail to comply with any of its terms. However, if You become
|
||||||
|
compliant, then the rights granted under this License from a particular
|
||||||
|
Contributor are reinstated (a) provisionally, unless and until such
|
||||||
|
Contributor explicitly and finally terminates Your grants, and (b) on an
|
||||||
|
ongoing basis, if such Contributor fails to notify You of the
|
||||||
|
non-compliance by some reasonable means prior to 60 days after You have
|
||||||
|
come back into compliance. Moreover, Your grants from a particular
|
||||||
|
Contributor are reinstated on an ongoing basis if such Contributor
|
||||||
|
notifies You of the non-compliance by some reasonable means, this is the
|
||||||
|
first time You have received notice of non-compliance with this License
|
||||||
|
from such Contributor, and You become compliant prior to 30 days after
|
||||||
|
Your receipt of the notice.
|
||||||
|
|
||||||
|
5.2. If You initiate litigation against any entity by asserting a patent
|
||||||
|
infringement claim (excluding declaratory judgment actions,
|
||||||
|
counter-claims, and cross-claims) alleging that a Contributor Version
|
||||||
|
directly or indirectly infringes any patent, then the rights granted to
|
||||||
|
You by any and all Contributors for the Covered Software under Section
|
||||||
|
2.1 of this License shall terminate.
|
||||||
|
|
||||||
|
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
|
||||||
|
end user license agreements (excluding distributors and resellers) which
|
||||||
|
have been validly granted by You or Your distributors under this License
|
||||||
|
prior to termination shall survive termination.
|
||||||
|
|
||||||
|
************************************************************************
|
||||||
|
* *
|
||||||
|
* 6. Disclaimer of Warranty *
|
||||||
|
* ------------------------- *
|
||||||
|
* *
|
||||||
|
* Covered Software is provided under this License on an "as is" *
|
||||||
|
* basis, without warranty of any kind, either expressed, implied, or *
|
||||||
|
* statutory, including, without limitation, warranties that the *
|
||||||
|
* Covered Software is free of defects, merchantable, fit for a *
|
||||||
|
* particular purpose or non-infringing. The entire risk as to the *
|
||||||
|
* quality and performance of the Covered Software is with You. *
|
||||||
|
* Should any Covered Software prove defective in any respect, You *
|
||||||
|
* (not any Contributor) assume the cost of any necessary servicing, *
|
||||||
|
* repair, or correction. This disclaimer of warranty constitutes an *
|
||||||
|
* essential part of this License. No use of any Covered Software is *
|
||||||
|
* authorized under this License except under this disclaimer. *
|
||||||
|
* *
|
||||||
|
************************************************************************
|
||||||
|
|
||||||
|
************************************************************************
|
||||||
|
* *
|
||||||
|
* 7. Limitation of Liability *
|
||||||
|
* -------------------------- *
|
||||||
|
* *
|
||||||
|
* Under no circumstances and under no legal theory, whether tort *
|
||||||
|
* (including negligence), contract, or otherwise, shall any *
|
||||||
|
* Contributor, or anyone who distributes Covered Software as *
|
||||||
|
* permitted above, be liable to You for any direct, indirect, *
|
||||||
|
* special, incidental, or consequential damages of any character *
|
||||||
|
* including, without limitation, damages for lost profits, loss of *
|
||||||
|
* goodwill, work stoppage, computer failure or malfunction, or any *
|
||||||
|
* and all other commercial damages or losses, even if such party *
|
||||||
|
* shall have been informed of the possibility of such damages. This *
|
||||||
|
* limitation of liability shall not apply to liability for death or *
|
||||||
|
* personal injury resulting from such party's negligence to the *
|
||||||
|
* extent applicable law prohibits such limitation. Some *
|
||||||
|
* jurisdictions do not allow the exclusion or limitation of *
|
||||||
|
* incidental or consequential damages, so this exclusion and *
|
||||||
|
* limitation may not apply to You. *
|
||||||
|
* *
|
||||||
|
************************************************************************
|
||||||
|
|
||||||
|
8. Litigation
|
||||||
|
-------------
|
||||||
|
|
||||||
|
Any litigation relating to this License may be brought only in the
|
||||||
|
courts of a jurisdiction where the defendant maintains its principal
|
||||||
|
place of business and such litigation shall be governed by laws of that
|
||||||
|
jurisdiction, without reference to its conflict-of-law provisions.
|
||||||
|
Nothing in this Section shall prevent a party's ability to bring
|
||||||
|
cross-claims or counter-claims.
|
||||||
|
|
||||||
|
9. Miscellaneous
|
||||||
|
----------------
|
||||||
|
|
||||||
|
This License represents the complete agreement concerning the subject
|
||||||
|
matter hereof. If any provision of this License is held to be
|
||||||
|
unenforceable, such provision shall be reformed only to the extent
|
||||||
|
necessary to make it enforceable. Any law or regulation which provides
|
||||||
|
that the language of a contract shall be construed against the drafter
|
||||||
|
shall not be used to construe this License against a Contributor.
|
||||||
|
|
||||||
|
10. Versions of the License
|
||||||
|
---------------------------
|
||||||
|
|
||||||
|
10.1. New Versions
|
||||||
|
|
||||||
|
Mozilla Foundation is the license steward. Except as provided in Section
|
||||||
|
10.3, no one other than the license steward has the right to modify or
|
||||||
|
publish new versions of this License. Each version will be given a
|
||||||
|
distinguishing version number.
|
||||||
|
|
||||||
|
10.2. Effect of New Versions
|
||||||
|
|
||||||
|
You may distribute the Covered Software under the terms of the version
|
||||||
|
of the License under which You originally received the Covered Software,
|
||||||
|
or under the terms of any subsequent version published by the license
|
||||||
|
steward.
|
||||||
|
|
||||||
|
10.3. Modified Versions
|
||||||
|
|
||||||
|
If you create software not governed by this License, and you want to
|
||||||
|
create a new license for such software, you may create and use a
|
||||||
|
modified version of this License if you rename the license and remove
|
||||||
|
any references to the name of the license steward (except to note that
|
||||||
|
such modified license differs from this License).
|
||||||
|
|
||||||
|
10.4. Distributing Source Code Form that is Incompatible With Secondary
|
||||||
|
Licenses
|
||||||
|
|
||||||
|
If You choose to distribute Source Code Form that is Incompatible With
|
||||||
|
Secondary Licenses under the terms of this version of the License, the
|
||||||
|
notice described in Exhibit B of this License must be attached.
|
||||||
|
|
||||||
|
Exhibit A - Source Code Form License Notice
|
||||||
|
-------------------------------------------
|
||||||
|
|
||||||
|
This Source Code Form is subject to the terms of the Mozilla Public
|
||||||
|
License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||||
|
file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||||
|
|
||||||
|
If it is not possible or desirable to put the notice in a particular
|
||||||
|
file, then You may include the notice in a location (such as a LICENSE
|
||||||
|
file in a relevant directory) where a recipient would be likely to look
|
||||||
|
for such a notice.
|
||||||
|
|
||||||
|
You may add additional accurate notices of copyright ownership.
|
||||||
|
|
||||||
|
Exhibit B - "Incompatible With Secondary Licenses" Notice
|
||||||
|
---------------------------------------------------------
|
||||||
|
|
||||||
|
This Source Code Form is "Incompatible With Secondary Licenses", as
|
||||||
|
defined by the Mozilla Public License, v. 2.0.
|
35
default.nix
Normal file
35
default.nix
Normal file
@ -0,0 +1,35 @@
|
|||||||
|
{ compiler ? "ghc843"
|
||||||
|
, haddock ? true
|
||||||
|
, test ? true
|
||||||
|
, benchmarks ? false
|
||||||
|
, dev ? true
|
||||||
|
}:
|
||||||
|
with builtins;
|
||||||
|
let
|
||||||
|
spec = fromJSON (readFile ./nixpkgs.json);
|
||||||
|
src = fetchTarball {
|
||||||
|
url = "https://github.com/${spec.owner}/${spec.repo}/archive/${spec.rev}.tar.gz";
|
||||||
|
sha256 = spec.sha256;
|
||||||
|
};
|
||||||
|
nixpkgs = import src {};
|
||||||
|
|
||||||
|
pkgs = nixpkgs.haskell.packages;
|
||||||
|
lib = nixpkgs.haskell.lib;
|
||||||
|
|
||||||
|
doHaddock = if haddock
|
||||||
|
then lib.doHaddock
|
||||||
|
else lib.dontHaddock;
|
||||||
|
doTest = if test
|
||||||
|
then lib.doCheck
|
||||||
|
else lib.dontCheck;
|
||||||
|
doBench = if benchmarks
|
||||||
|
then lib.doBenchmark
|
||||||
|
else nixpkgs.lib.id;
|
||||||
|
doDev = if dev
|
||||||
|
then drv: lib.enableCabalFlag drv "develop"
|
||||||
|
else nixpkgs.lib.id;
|
||||||
|
|
||||||
|
free-category = doDev(doHaddock(doTest(doBench(
|
||||||
|
pkgs.${compiler}.callPackage ./pkg.nix { inherit nixpkgs; }))));
|
||||||
|
in
|
||||||
|
{ inherit free-category; }
|
60
free-category.cabal
Normal file
60
free-category.cabal
Normal file
@ -0,0 +1,60 @@
|
|||||||
|
name: free-category
|
||||||
|
version: 0.0.1.0
|
||||||
|
synopsis: Free category
|
||||||
|
description:
|
||||||
|
category: Algebra, Control, Monads, Category
|
||||||
|
homepage: https://github.com/coot/free-category#readme
|
||||||
|
bug-reports: https://github.com/coot/free-category/issues
|
||||||
|
author: Marcin Szamotulski
|
||||||
|
maintainer: profunctor@pm.me
|
||||||
|
copyright: (c) 2018 Marcin Szamotulski
|
||||||
|
license: MPL-2.0
|
||||||
|
license-file: LICENSE
|
||||||
|
build-type: Simple
|
||||||
|
cabal-version: >= 1.10
|
||||||
|
extra-source-files:
|
||||||
|
ChangeLog.md
|
||||||
|
README.md
|
||||||
|
|
||||||
|
source-repository head
|
||||||
|
type: git
|
||||||
|
location: https://github.com/coot/free-category
|
||||||
|
|
||||||
|
flag develop
|
||||||
|
description: Set -Werror flag
|
||||||
|
manual: True
|
||||||
|
default: False
|
||||||
|
|
||||||
|
library
|
||||||
|
exposed-modules:
|
||||||
|
Control.Category.Free
|
||||||
|
other-modules:
|
||||||
|
Paths_free_category
|
||||||
|
hs-source-dirs:
|
||||||
|
src
|
||||||
|
default-extensions:
|
||||||
|
ConstraintKinds
|
||||||
|
DataKinds
|
||||||
|
DeriveFunctor
|
||||||
|
EmptyDataDecls
|
||||||
|
FlexibleInstances
|
||||||
|
FlexibleContexts
|
||||||
|
GADTs
|
||||||
|
KindSignatures
|
||||||
|
InstanceSigs
|
||||||
|
MultiParamTypeClasses
|
||||||
|
OverloadedStrings
|
||||||
|
PolyKinds
|
||||||
|
RankNTypes
|
||||||
|
ScopedTypeVariables
|
||||||
|
TupleSections
|
||||||
|
TypeApplications
|
||||||
|
TypeFamilies
|
||||||
|
build-depends:
|
||||||
|
base >=4.11 && <5
|
||||||
|
, categories
|
||||||
|
if flag(develop)
|
||||||
|
ghc-options: -Werror -Wall -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints -Wno-deprecations
|
||||||
|
else
|
||||||
|
ghc-options: -Wall -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints -Wno-deprecations
|
||||||
|
default-language: Haskell2010
|
6
nixpkgs.json
Normal file
6
nixpkgs.json
Normal file
@ -0,0 +1,6 @@
|
|||||||
|
{
|
||||||
|
"owner": "NixOS",
|
||||||
|
"repo": "nixpkgs",
|
||||||
|
"rev": "cac85f68122b1ffd77bc15c1b8eef9ec328693bf",
|
||||||
|
"sha256": "1590hbf5avxr0izw7nhbxpxwb1yrs53xcrdfzmz6aza072n04xac"
|
||||||
|
}
|
32
pkg.nix
Normal file
32
pkg.nix
Normal file
@ -0,0 +1,32 @@
|
|||||||
|
{ mkDerivation
|
||||||
|
, nixpkgs
|
||||||
|
, stdenv
|
||||||
|
, base
|
||||||
|
, categories
|
||||||
|
}:
|
||||||
|
let
|
||||||
|
lib = nixpkgs.lib;
|
||||||
|
srcFilter = src: path: type:
|
||||||
|
let relPath = lib.removePrefix (toString src + "/") (toString path);
|
||||||
|
in
|
||||||
|
lib.hasPrefix "src" relPath
|
||||||
|
|| lib.hasPrefix "test" relPath
|
||||||
|
|| lib.any
|
||||||
|
(a: a == relPath)
|
||||||
|
[ "Setup.hs" "cabal.project" "ChangeLog.md" "package.yaml" "LICENSE"];
|
||||||
|
in
|
||||||
|
mkDerivation {
|
||||||
|
pname = "free-algebras";
|
||||||
|
version = "0.0.4.0";
|
||||||
|
src = lib.cleanSourceWith { filter = srcFilter ./.; src = ./.; };
|
||||||
|
libraryHaskellDepends = [
|
||||||
|
base
|
||||||
|
];
|
||||||
|
libraryToolDepends = [ ];
|
||||||
|
testHaskellDepends = [
|
||||||
|
base
|
||||||
|
];
|
||||||
|
homepage = "https://github.com/coot/free-algebras#readme";
|
||||||
|
license = stdenv.lib.licenses.mpl20;
|
||||||
|
enableSeparateDocOutput = false;
|
||||||
|
}
|
21
shell.nix
Normal file
21
shell.nix
Normal file
@ -0,0 +1,21 @@
|
|||||||
|
{ compiler ? "ghc843"
|
||||||
|
, haddock ? true
|
||||||
|
, test ? true
|
||||||
|
, benchmarks ? false
|
||||||
|
, dev ? false
|
||||||
|
}:
|
||||||
|
with builtins;
|
||||||
|
let
|
||||||
|
default = import ./default.nix {inherit benchmarks compiler dev haddock test;};
|
||||||
|
spec = fromJSON (readFile ./nixpkgs.json);
|
||||||
|
src = fetchTarball {
|
||||||
|
url = "https://github.com/${spec.owner}/${spec.repo}/archive/${spec.rev}.tar.gz";
|
||||||
|
sha256 = spec.sha256;
|
||||||
|
};
|
||||||
|
nixpkgs = import src {};
|
||||||
|
in
|
||||||
|
{
|
||||||
|
free-category = if nixpkgs.lib.inNixShell
|
||||||
|
then default.free-category.env
|
||||||
|
else default.free-category;
|
||||||
|
}
|
57
src/Control/Category/Free.hs
Normal file
57
src/Control/Category/Free.hs
Normal file
@ -0,0 +1,57 @@
|
|||||||
|
module Control.Category.Free
|
||||||
|
( Cat (..)
|
||||||
|
, liftCat
|
||||||
|
, foldFunCat
|
||||||
|
, unFoldFunCat
|
||||||
|
, foldCat
|
||||||
|
)
|
||||||
|
where
|
||||||
|
|
||||||
|
import Prelude hiding (id, (.))
|
||||||
|
import Control.Category (Category (..), (<<<))
|
||||||
|
|
||||||
|
data Cat :: (* -> * -> *) -> * -> * -> * where
|
||||||
|
Id :: Cat f a a
|
||||||
|
(:.:) :: f b c -> Cat f a b -> Cat f a c
|
||||||
|
|
||||||
|
instance Category (Cat f) where
|
||||||
|
id = Id
|
||||||
|
Id . ys = ys
|
||||||
|
(x :.: xs) . ys = x :.: (xs . ys)
|
||||||
|
|
||||||
|
infixr 9 :.:
|
||||||
|
|
||||||
|
instance Semigroup (Cat f o o) where
|
||||||
|
f <> g = g . f
|
||||||
|
|
||||||
|
instance Monoid (Cat f o o) where
|
||||||
|
mempty = Id
|
||||||
|
|
||||||
|
liftCat :: f a b -> Cat f a b
|
||||||
|
liftCat fab = fab :.: Id
|
||||||
|
|
||||||
|
foldFunCat
|
||||||
|
:: forall f c a b .
|
||||||
|
Category c
|
||||||
|
=> (forall x y. f x y -> c x y)
|
||||||
|
-- ^ a map of graphs
|
||||||
|
-> (Cat f a b -> c a b)
|
||||||
|
-- ^ a functor from @'Cat' f@ to @g@
|
||||||
|
foldFunCat _ Id = id
|
||||||
|
foldFunCat fun (bc :.: ab)
|
||||||
|
= fun bc <<< foldFunCat fun ab
|
||||||
|
|
||||||
|
unFoldFunCat
|
||||||
|
:: (forall x y. Cat f x y -> c x y)
|
||||||
|
-> f a b
|
||||||
|
-> c a b
|
||||||
|
unFoldFunCat fun = fun . liftCat
|
||||||
|
|
||||||
|
-- |
|
||||||
|
-- It specialized to @'Cat' ('Cat' f) a b -> 'Cat' a b@, which is the 'join' of
|
||||||
|
-- the free monad associated with this construction.
|
||||||
|
foldCat
|
||||||
|
:: Category c
|
||||||
|
=> Cat c a b
|
||||||
|
-> c a b
|
||||||
|
foldCat = foldFunCat id
|
Loading…
Reference in New Issue
Block a user