latex3: new implementation

Self hosting fails at step4 because of exceeded TeX capacity.

Makefile.impls

@@ -36,13 +36,14 @@ wasm_MODE = wasmtime
 
 IMPLS = ada ada.2 awk bash basic bbc-basic c c.2 chuck clojure coffee common-lisp cpp crystal cs d dart \
 	elisp elixir elm erlang es6 factor fantom fennel forth fsharp go groovy gnu-smalltalk \
-	guile haskell haxe hy io janet java java-truffle js jq julia kotlin livescript logo lua make mal \
+	guile haskell haxe hy io janet java java-truffle js jq julia kotlin latex3 livescript logo lua make mal \
 	matlab miniMAL nasm nim objc objpascal ocaml perl perl6 php picolisp pike plpgsql \
 	plsql powershell prolog ps purs python python.2 r racket rexx rpython ruby ruby.2 rust scala scheme skew sml \
 	swift swift3 swift4 swift5 tcl ts vala vb vhdl vimscript wasm wren yorick xslt zig
 
 step5_EXCLUDES += bash        # never completes at 10,000
 step5_EXCLUDES += basic       # too slow, and limited to ints of 2^16
+step5_EXCLUDES += latex3      # no iteration, limited native stack
 step5_EXCLUDES += make        # no TCO capability (iteration or recursion)
 step5_EXCLUDES += mal         # host impl dependent
 step5_EXCLUDES += matlab      # never completes at 10,000
@@ -145,6 +146,7 @@ js_STEP_TO_PROG =            impls/js/$($(1)).js
 jq_STEP_PROG =               impls/jq/$($(1)).jq
 julia_STEP_TO_PROG =         impls/julia/$($(1)).jl
 kotlin_STEP_TO_PROG =        impls/kotlin/$($(1)).jar
+latex3_STEP_TO_PROG =        impls/latex3/$($(1)).tex
 livescript_STEP_TO_PROG =    impls/livescript/$($(1)).js
 logo_STEP_TO_PROG =          impls/logo/$($(1)).lg
 lua_STEP_TO_PROG =           impls/lua/$($(1)).lua

README.md

@@ -87,6 +87,7 @@ FAQ](docs/FAQ.md) where I attempt to answer some common questions.
 | [jq](#jq) | [Ali MohammadPur](https://github.com/alimpfard) |
 | [Julia](#julia) | [Joel Martin](https://github.com/kanaka)  |
 | [Kotlin](#kotlin) | [Javier Fernandez-Ivern](https://github.com/ivern) |
+| [LaTeX3](#latex3) | [Nicolas Boulenguez](https://github.com/asarhaddon) |
 | [LiveScript](#livescript) | [Jos van Bakel](https://github.com/c0deaddict) |
 | [Logo](#logo) | [Dov Murik](https://github.com/dubek) |
 | [Lua](#lua) | [Joel Martin](https://github.com/kanaka)  |
@@ -684,6 +685,18 @@ make
 java -jar stepX_YYY.jar
 ```
 
+### LaTeX3
+
+The LaTeX3 implementation of mal has been tested with pdfTeX
+3.141592653-2.6-1.40.24.
+
+Self hosting is too slow for any sensible timeout, and crashes in
+step4, apparently because of hard-coded limitations.
+
+Anybody working on this should uncomment the two lines of (slow)
+debugging options in the step file, and export DEBUG=1 (for more
+output than tests accept).
+
 ### LiveScript
 
 The LiveScript implementation of mal has been tested with LiveScript 1.5.

impls/latex3/Dockerfile

@@ -0,0 +1,22 @@
+FROM ubuntu:20.04
+MAINTAINER Joel Martin <[email protected]>
+
+##########################################################
+# General requirements for testing or common across many
+# implementations
+##########################################################
+
+RUN apt-get -y update
+
+# Required for running tests
+RUN apt-get -y install make python3
+RUN ln -fs /usr/bin/python3 /usr/local/bin/python
+
+RUN mkdir -p /mal
+WORKDIR /mal
+
+##########################################################
+# Specific implementation requirements
+##########################################################
+
+RUN apt-get -y install texlive-latex-base

impls/latex3/Makefile

@@ -0,0 +1,3 @@
+all:
+clean:
+	rm -f *~ *.aux *.dvi *.log argv