I have released nyacc version 0.86.0. This release includes the following: 1) I reworked the parser to behave with interactive use in Guile better. 2) I hacked on the example language compilers to operate at the Guile command line. (You can run "make install-nx-languages".) 3) I replaced use of (ice-9 regexp) for the bootstrapper team. (you know who you are) 4) I fixed a bug in in nyacc/lex.scm make-num-reader which broke on certain integer forms; and now allow .123 as a legal float. 5) I fixed compile-ffi.scm to correctly show help message w/o filename arg.
The nx-languages include javascript, octave and tcl. "nx" stands for both "nyacc extension" and "not exactly". These are a bit rough right now. But the parser / compiler design becoming more uniform among them: 1) The nyacc-generated parsers (except for nx-tcl) generate SXMl trees. 2) The 'to Tree-IL" compilers use (Andy Wingo's) foldts*-values to pick off easy stuff and declarations on the way down and build up Tree-IL on the way up. scheme@(guile-user)> ,L nx-javascript Happy hacking with nx-javascript! To switch back, type `,L scheme'. nx-javascript@(guile-user)> var a = 1; nx-javascript@(guile-user)> ,L nx-octave Happy hacking with nx-octave! To switch back, type `,L nx-javascript'. nx-octave@(guile-user)> b = 2; nx-octave@(guile-user)> ,L nx-tcl Happy hacking with nx-tcl! To switch back, type `,L nx-octave'. nx-tcl@(guile-user)> set c 3 nx-tcl@(guile-user)> ,L scheme Happy hacking with Scheme! To switch back, type `,L nx-tcl'. scheme@(guile-user)> (+ a b (string->number c)) $1 = 6 I will be working on Tcl to do more agressive parsing (e..g, 123 as integer instead of string) and lazy conversion to strings. I am thinking about a simple object model that can be used with multiple extension languages. And I like my new elisp minor mode that helps make awesome docstrings: (available athttps://github.com/mwette/guile-contrib) scheme@(guile-user)> ,use (nyacc parse) scheme@(guile-user)> ,d make-lalr-parser - Procedure: make-lalr-parser mach [options] => parser Generate a procedure for parsing a language, where MACH is a machine generated by 'make-lalr-machine'. This generates a procedure that takes one argument, a lexical analyzer: (parser lexical-analyzer #:debug #t) and is used as (define xyz-parse (make-lalr-parser xyz-mach)) (with-input-from-file "sourcefile.xyz" (lambda () (xyz-parse (gen-lexer)))) The generated parser is reentrant. Options are: '#:skip-if-unexp' This is a list of tokens to skip if not expected. It is used to allow comments to be skipped. The default is ''()'. '#:interactive' If '#t', this tells the parserthat this is being called interactively, so that the token '$end' is not expected. The default value is '#f'. 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. 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
