NYACC, for Not Yet Another Compiler Compiler, is set of guile modules for generating parsers and lexical analyzers. It also provides sample parsers and pretty-printers using SXML trees as an intermediate representation.
It provides a decent C parser and a `FFI Helper' tool to help create Guile Scheme bindings for C-based libraries. It provides (partially implemented) compilers based on above mentioned parsers to allow execution with Guile as extension languages. --------------------------- Updates for version 0.86.4: 1) Made significant changes to the C99 parser grammar so that it is more robust when parsing attribute specifiers - e.g., __attribute__((packed)) 2) Changed scripts/compile-ffi.scm so that dependent ffi and associated scm files are checked and (re)compiled if outdated (needs some work still : sometimes compiles twice) 3) Fixed fh-wrap, fh-unwrap bugs in system/ffi-help-rt.scm 4) Worked misc issues on example language parsers (octave, modelica). Note: I will now start to work on cleaning up how c99 handles comments. The goal is to carry code-comments as attributes in the AST. Interesting tidbit for YACC hackers: When I added __attribute__ handling "everywhere" I found that I was getting a number of shift-reduce conflicts. So I set up a precedence rule that looks something like: (prec< 'shift-on-attr "__attribute__" 'reduce-on-attr) So in productions where I want to shift on "__attribute__" I use a RHS like (foo bar ($prec 'shift-on-attr)) and in productions where I want to reduce on "__attribute__" I use a RHS like (foo baz ($prec 'reduce-on-attr)) where RHS = "right hand side of production rule" --------------------------- NYACC maturity is beta level. NYACC is free software; the full source distribution is available through * the tarball repository: https://download.savannah.gnu.org/releases/nyacc/ * the git repository: git://git.savannah.nongnu.org/nyacc.git home page, project page and user's guide: * http://www.nongnu.org/nyacc * https://savannah.nongnu.org/projects/nyacc * http://www.nongnu.org/nyacc/nyacc-ug.html For support see: https://savannah.nongnu.org/support/?group=nyacc