2003-12-16  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/11723
	* include/bits/locale_facets.h: Add _M_bit and _M_wmask,
	used to speed up the computation of ctype::do_is.
	* config/locale/generic/ctype_members.cc
	(_M_initialize_ctype): Fill _M_bit and _M_wmask.
	(ctype::do_is): Use _M_bit and _M_wmask.
	* config/locale/gnu/ctype_members.cc: Likewise.
	* testsuite/performance/is_wchar_t.cc: New.

	* testsuite/performance/narrow_widen_wchar_t.cc: Tweak
	string literal (incorrect citation ;)

	* include/bits/locale_facets.h: Minor tweaks, const
	correctness, unsigned -> size_t.

From-SVN: r74686