type_traits (__is_constructible_helper1): Rename to __is_constructible_helper1...

2009-12-31  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/type_traits (__is_constructible_helper1): Rename
	to __is_constructible_helper1, tweaked to a specialization of
	__is_constructible_helper.
	(is_constructible): Adjust; minor formatting and stylistic
	changes throughout.
	* testsuite/util/testsuite_tr1.h (test_relationship): Change
	variadic version to an overload of test_property.
	* testsuite/20_util/is_constructible/value.cc: Adjust.
	* 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: r155536