type_traits (is_nothrow_constructible): Add.

type_traits (is_nothrow_constructible): Add.

2010-06-09  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/type_traits (is_nothrow_constructible): Add.
	(declval): Add noexcept specification.
	* testsuite/util/testsuite_tr1.h (struct NothrowExplicitClass,
	ThrowExplicitClass, NoexceptExplicitClass, ExceptExplicitClass):
	Add.
	* testsuite/20_util/is_nothrow_constructible/value.cc: New.
	* testsuite/20_util/is_nothrow_constructible/requirements/
	typedefs.cc: Likewise.
	* testsuite/20_util/is_nothrow_constructible/requirements/
	explicit_instantiation.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: r160523