[Bug c/52600] OpenMP: declaration as structured block

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52600

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |rth at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-26 10:17:02 UTC ---
In C++ we accept this, in C we don't (we call c_parser_statement, but
declarations aren't handled by that, due to the allowing/disallowing of mixing
of declarations and statements in C99 vs. C90).
I guess we could move the loop body from c_parser_compound_statement_nostart
to a new function and use it there as well as in c_parser_omp_structured_block,
c_parser_omp_{parallel,task} and c_parser_omp_sections_scope.

It is very ugly to allow there declarations though, that means code behaves
very differently between -fopenmp and -fno-openmp - in the former case the
declared var would go out of scope immediately, in the latter would be around
until closing }.