* 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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158928
138bc75d-0d04-0410-961f-
82ee72b054a4