Re: Pre-Parsers

    vbdis@aol.com (VBDis) wrote:
> Im Artikel 00-09-065, Jim Granville
> <jim.granville@designtools.co.nz> schreibt:
>
> > I am looking into pre-parsers, esp those that also include
> >MACRO capability, with the usual define/ifdef/endif.
>
[snipped good description about preprocessor implementation]


> Some features can require more processing, like the evaluation of
> sizeof(x) in C. In this case all type and variable declarations must
> also be stored by the parser, so that the size of every declared
> symbol can be evaluated in conditional expressions. At the same time
> nested scopes must be implemented, so that the parser can find the
> appropriate definition of a symbol within the current nesting of
> subroutine declarations etc. Such features are closesly related to a
> specific compiler, and that's why you'll never find a "general"
> preprocessor for the current C standard. Even the stand-alone
> preprocessors, shipped with some C compilers, may be usable for some
> general preprocessing, but may fail to produce correct output for a
> different C compiler.


Why do you need to parse 'sizeof' if all you are interested is a
preprocessor (macro capability)? Or do you need some other capability?


Thank you,
Saroj Mahapatra

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