2004-12-16  Paolo Carlini  <pcarlini@suse.de>

	* include/tr1/type_traits: Implement add_const, add_volatile,
	and add_cv.
	* testsuite/tr1/4_metaprogramming/const_volatile_modifications/
	add_const.cc: New.
	* testsuite/tr1/4_metaprogramming/const_volatile_modifications/
	add_cv.cc: Likewise.
	* testsuite/tr1/4_metaprogramming/const_volatile_modifications/
	add_volatile.cc: Likewise.

From-SVN: r92265