Const correctness issue: http://gcc.gnu.org/ml/libstdc++/2003-01/msg00370.html

Const correctness issue: gcc.gnu.org/ml/libstdc++/2003-01/msg00370.html

2003-02-01  Paolo Carlini  <pcarlini@unitus.it>
	    Benjamin Kosnik  <bkoz@redhat.com>

	Const correctness issue:
	http://gcc.gnu.org/ml/libstdc++/2003-01/msg00370.html
	* include/bits/locale_classes.h
	(locale::_Impl::_M_facets): Change type to const facet**.
	(locale::_Impl::_M_install_facet): Change declaration to
	take const facet*.
	(locale::facet::_M_references): Make mutable.
	(locale::facet::_M_add_reference): Declare const.
	(locale::facet::_M_remove_reference): Likewise.
	* include/bits/locale_facets.tcc
	(use_facet(const locale&)): Tweak for const facet** _M_facets.
	(has_facet(const locale&)): Likewise.
	* src/locale.cc
	(locale::facet::_M_add_reference): Adjust definition.
	(locale::facet::_M_remove_reference): Likewise.
	* src/localename.cc
	(locale::_Impl::_Impl(const _Impl&, size_t)): Tweak for
	const facet** _M_facets.
	(locale::_Impl::_Impl(const char*, size_t)): Likewise.
	(locale::_Impl::_Impl(facet**, size_t, bool)): Likewise.
	(locale::_Impl::_M_install_facet): Adjust definition to take
	const facet* and for const facet** _M_facets.
	* testsuite/22_locale/locale/cons/8.cc: Add.

Co-Authored-By: Benjamin Kosnik <bkoz@redhat.com>
From-SVN: r62248