Readability
* Use implicit parameter transmission ($(_list?) instead of $(call
_list?,$1),
first/lastword instead of word 1/words,
$1 instead of $(1).
* Use an undefined $(rem) macro and some automatic stripping (if,
foreach) to indent code with less calls to `strip` functions.
* Name the Make macro implementing a MAL core function exactly like the
function (modulo the encoding above) and simplify core_ns accordingly.
* Replace empty results representing `nil` with explicit MAL values.
* Implement large conditionals with a computed variable name, as already
done in printer.mk. For QUASIQUOTE and EVAL, this reduces a lot the
diff between steps.
* Represent the reader state as an explicit global variable instead of
passing the same name as argument again and again.
* Merge read-atom into read-form so that the switch on first character
is more visible.
Encapsulation
* Hide most representations into types.mk.
* Implement the type as a suffix in order to avoid a conditional in
_obj_type.
* Implement _error with throw.
* Create distinct types for keywords and macros.
* Move most metadata and atom stuff from core.mk to types.mk.
* Move parameter association from env to types because it hides more
about the representation of functions.
Representation
* Encode Make special characters in all strings/keywords/symbols, so
they can be used directly as spaced words and/or variable names for
map keys. (The encoding adding separating characters is kept for
read-string and seq).
* Change representation of numbers/strings/keywords/symbols, reducing
the number of Make variables.
Various
* Allow keyword argument for keyword core function.
* Shorten time-mes,slurp,readline...
* Remove obsolete stuff:
* `get` and `contains?` for vectors
* `count` for hash-maps
* `_join` from util.mk.
* `type` from core.mk.
* Add a function listing env_keys for DEBUG-EVAL.
* Fix some includes.
The modified implementations have been tested on Debian bullseye.
* prefer later Ubuntu image, hopefully reducing the image count
* for Ubuntu versions, prefer numerical versions to unsorted codenames
* prefer packaged build systems to local rebuilds
* prefer the current default version of each build system
* delegate resolution of indirect dependencies to apt
* xslt: remove intermediate run script. The initial motivation is to
provide an explicit path to the python3 interpreter, as the
versioned executable is not always in PATH.
* Add DEBIAN_FRONTEND=noninteractive to some Dockerfiles. This is to
workaround tzdata which prompts interactively by default.
* Debian/Ubuntu do not ship a python->python2 link by default.
* With the improved logo implementation in another branch, there is no
need anymore to tweat the garbage collector settings.
* logo: use upstream brandy compiler (instead of building).
* guile: adjust deb-src mechanism to build ucblogo and workaround doc
build bug.
c.2:
By updating to 24.04 we get around an error with declarations after
labels which is allowed in more recent compiler versions.
make:
With older make, the newer make code results in this error:
../make/readline.mk:13: *** unterminated call to function 'eval': missing ')'. Stop.
Newer versions of make work fine.
perl6:
With older rakudo, this error occurs:
user> (let* (DEBUG-EVAL false) (- 3 1))
Cannot resolve caller Numeric(types::MalFalse: ); none of these signatures match:
ocaml:
Fixes build error that happens with older versions of ocaml:
ocamlopt -a types.ml reader.ml printer.ml env.ml core.ml -o mal_lib.cmxa
File "env.ml", line 15, characters 8-21:
Error: Unbound value Data.find_opt
objpascal:
With older compiler, the following error occurs:
user> (apply str (seq "this is a test"))
*** Error in `../objpascal/stepA_mal': corrupted size vs. prev_size: 0x000000000246c360 ***
See issue #587.
* Merge eval-ast and eval into a single conditional.
* Expand macros during the apply phase, removing lots of duplicate
tests, and increasing the overall consistency by allowing the macro
to be computed instead of referenced by name (`((defmacro! cond
(...)))` is currently illegal for example).
* Print "EVAL: $ast" at the top of EVAL if DEBUG-EVAL exists in the
MAL environment.
* Remove macroexpand and quasiquoteexpand special forms.
* Use pattern-matching style in process/step*.txt.
Unresolved issues:
c.2: unable to reproduce with gcc 11.12.0.
elm: the directory is unchanged.
groovy: sometimes fail, but not on each rebuild.
nasm: fails some new soft tests, but the issue is unreproducible when
running the interpreter manually.
objpascal: unreproducible with fpc 3.2.2.
ocaml: unreproducible with 4.11.1.
perl6: unreproducible with rakudo 2021.09.
Unrelated changes:
Reduce diff betweens steps.
Prevent defmacro! from mutating functions: c forth logo miniMAL vb.
dart: fix recent errors and warnings
ocaml: remove metadata from symbols.
Improve the logo implementation.
Encapsulate all representation in types.lg and env.lg, unwrap numbers.
Replace some manual iterations with logo control structures.
Reduce the diff between steps.
Use native iteration in env_get and env_map
Rewrite the reader with less temporary strings.
Reduce the number of temporary lists (for example, reverse iteration
with butlast requires O(n^2) allocations).
It seems possible to remove a few exceptions: GC settings
(Dockerfile), NO_SELF_HOSTING (IMPLS.yml) and step5_EXCLUDES
(Makefile.impls) .
vivid packages are no longer available.
There are still implementations that use vivid because updating to
xenial was not sufficient to get them working again.
- Add a `vec` built-in function in step7 so that `quasiquote` does not
require `apply` from step9.
- Introduce quasiquoteexpand special in order to help debugging step7.
This may also prepare newcomers to understand step8.
- Add soft tests.
- Do not quote numbers, strings and so on.
Should ideally have been in separate commits:
- elisp: simplify and fix (keyword :k)
- factor: fix copy/paste error in let*/step7, simplify eval-ast.
- guile: improve list/vector types
- haskell: revert evaluation during quasiquote
- logo, make: cosmetic issues
- Reorder README to have implementation list after "learning tool"
bullet.
- This also moves tests/ and libs/ into impls. It would be preferrable
to have these directories at the top level. However, this causes
difficulties with the wasm implementations which need pre-open
directories and have trouble with paths starting with "../../". So
in lieu of that, symlink those directories to the top-level.
- Move the run_argv_test.sh script into the tests directory for
general hygiene.
