A Haskell compiler.
Installation Instructions
The implementation language is OCaml (Batteries Included). We use OUnit2 for unit testing. I haven't written an install script, but installing ocaml, opam, and then batteries and ounit2 through opam should do the trick. Once those are installed, just run
make
to get the compiler running. The default makefile builds both bytecode and native code versions of the compiler and its test suite.
We use a custom-built canonical LR(1) parser generator, because resolving grammar conflicts is too hard to be left to confusing yacc output. The parser can be rebuilt by running
make parse-gen
Finally, if you want to run the compiler with the ocaml debugger, run
make debug
or
make test-debug
for the test suite. Note that the ocaml debugger only works on bytecode executables, not native code.
Implementation Details
The source language is mostly Haskell 98, as specified in the Revised Report. Some features of Haskell 2010 are included:
- Fixity resolution
- Line comment syntax
- Remove n+k patterns
- Remove datatype contexts
Some features of Haskell 98/10 are not supported. In particular:
- Very, very small standard library
- No unary negation
- No implicit closing brace on parser error
- No strict fields
We do not support any of the fancy modes of a full-featured Haskell compiler:
no --interactive, no --make, no -e.
We compile to LLVM, not native code.
See additional ideas in