2010-04-30  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/bits/stl_pair.h (piecewise_construct_t,
	pair<>::pair(piecewise_construct_t, tuple, tuple)): Add.
	(pair<>::__cons, pair<>::__do_cons): Declare.
	(__decay_and_strip, __strip_reference_wrapper): Move...
	* include/std/type_traits: ... here.
	* include/std/functional (_Index_tuple, _Build_index_tuple): Move...
	* include/std/tuple: ... here.
	(pack_arguments): Add.
	(pair<>::__cons, pair<>::__do_cons): Define.
	* testsuite/20_util/tuple/creation_functions/pack_arguments.cc: New.
	* testsuite/20_util/pair/piecewise.cc: Likewise.
	* testsuite/20_util/tuple/cons/big_tuples.cc: Include <utility>.
	* testsuite/20_util/tuple/cons/constructor.cc: Likewise.
	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Adjust
	dg-error line numbers.
	* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
	Likewise.
	* testsuite/20_util/declval/requirements/1_neg.cc: Likewise.

From-SVN: r158928