valarray_meta.h (_UnFunBase<>): Remove.

valarray_meta.h (_UnFunBase<>): Remove.

	* include/bits/valarray_meta.h (_UnFunBase<>): Remove.
	(_UnFunClos<>): Same.
	(_UnBase<>): Reformat.  Make first template-parameter non
	template.
	(_UnClos<>): Likewise.
	(_Expr<>): Reformate.  Adjust unary member operator return types.
	(_DEFINE_EXPR_UNARY_OPERATOR): Adjust definition.
	(_DEFINE_EXPR_UNARY_FUNCTION): Likewise.
	* include/std/std_valarray.h (_UnClos<>): Adjust declaration.
	(valarray<>::_UnaryOp<>):  New nested traits. Adjust unary member
	operator return types.  Reformat.
	(_Bitwise_not): Remove.
	(_DEFINE_VALARRAY_UNARY_OPERATOR): Adjust definition.
	* testsuite/26_numerics/valarray_name_lookup.C: New test.

From-SVN: r55993