[PATCH] Pragma Loop constant expression support

[Tyler Nowicki]

Hi Richard,

Thanks for the review. Sorry for the delayed response. I made the changes
you suggested except for the following.

+  Token EoF;
> The 'o' in EOF is traditionally capitalized.


Unfortunately EOF is defined by stdio.h and at least in VS the conflict
triggers a compilation error. Also in PragmaMSPragma::HandlePragma EoF is
used.

Please review the attached patch.

Thanks,

Tyler
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