Re: Forthcoming revisions to the garbage collector; crazy huge hack

I'm going to stitch this in after the preprocessor has run on a given source file. (I'd have to preprocess it anyway, so it seems sensible to only preprocess it once!) Oh, FWIW the preprocessor should be able to handle just about anything, 'cos I'm cheating. I'm taking c-parse.y and cpplex.c from GCC, and tearing them down into something that can unambiguously spot C blocks (`stmts_and_decls'), assignments (`expr_no_commas'), Lisp_Object variable declarations (`decl' nodes), and temporaries. Everything else that I can throw away I will; we don't need a complete C parser, let alone the Objective C parts (sorry, Ovidiu ;) ). In one respect it'll be more complicated than GCC's parser; it needs to maintain knowledge of where in the pre-lexed sources a given lexical component comes from, so we can rewrite the temporaries; but it shouldn't be terribly hard. (I think GCC also contains some temporary-rewriting stuff I can pinch from; building a temporary is an RTL-level equivalent of what this preprocessor would have to do on the source code level. Fun. (But if this were C++ it would not be fun, it would be torment...)