Re: [Gomp-discuss] Re: Lexing and parsing OMP directives, again

[Scott Robert Ladd]

Zack Weinberg wrote:
> You've correctly understood my suggestion.  I had in mind that cpplib
> would, upon encountering a #pragma, first check whether it was a
> #pragma that affects preprocessor behavior.  If not, it would inject
> the token __builtin_pragma into its output stream, then pass all the
> tokens following the #pragma on unchanged, and finally inject a ;
> token at the end of the directive line.
>
> The C parser would then interpret __builtin_pragma as a _keyword_, and
> expect a stream of tokens following - with whatever syntax and
> semantics are necessary - until it reached the trailing semicolon, at
> which point it would go back to the normal grammar.

As I understand it, what you're suggesting is that cpplib would 
translate OpenMP pragmas into internally-defined language extensions 
handled by later stages of the compile.


> C99's _Pragma() would get the same treatment, except that its argument
> would be unstringified first.

So it sounds like any work required to implement OpenMP will also be 
applicable implementing C99. Nice and synergistic.

--
Scott Robert Ladd
Coyote Gulch Productions (http://www.coyotegulch.com)