[plt-scheme] parsing/prettyprinting C

From: Dave Herman (dherman at ccs.neu.edu)
Date: Mon Mar 9 15:33:01 EDT 2009

FYI, version 0.2 is now available in PLaneT as (planet dherman/c:2:0).



Dave Herman wrote:
>>> I see it uses yacc.  The 2nd edition K&R has a grammar acceptable by
>>> yacc in appendix A, section A13.  Are there any difficulties to
>>> making this a complete parser other than "just typing it in" ?
> P.S. To answer your question more directly: *yes*. Parsing C is 
> extremely tricky, especially using a parser generator. Long story short: 
> the parser has to maintain an environment and feed the information to 
> the lexer, and the lexer has to make sure it doesn't look ahead to far 
> before the environment has been appropriately updated. It's one of 
> history's glorious botches (a remarkable proportion of which seems to 
> belong to C). Of course, C++ would be orders of magnitude harder...
> Dave
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