[Bug libstdc++/34449] use_facet<xxx_byname>(locale::classic()) returns true

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

------- Comment #3 from bkoz at gcc dot gnu dot org  2007-12-14 18:56 -------

The only thing that I have issue with is this part:

   assert (check_use_facet<std::ctype_byname<char> >(named));

There is no verbiage in the standard that specifies that named locales use the
_byname facets. This is implied in the test case given.

I'm looking in N2461 at 22.1.1.2,  where the const char* locale constructors
were added. There is no specification of byname facets.

>From 22.1.1.1.2

  For some standard facets a standard ?. . ._byname? class, derived from it,
implements the virtual function semantics equivalent to that facet of the
locale constructed by locale(const char*) with the same name.

This doesn't actually require what this code asserts.

;)

-benjamin


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34449