[Bug c++/50454] Unexpected problems with -pedantic / -pedantic-errors and __int128 and unsigned __int128 specializations

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50454

--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-19 23:56:22 UTC ---
Created attachment 25321
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25321
patchlet

Constructively, this is something which should lead to unsigned __int128
treated exactly like plain __int128 (note: not fully tested)

On x86_64 -m32, where __int128 isn't available we reject with 'template
argument 1 is invalid', we don't reach grokdeclarator at all.