[PATCH] Make test helper work with non-copyable types

[Jonathan Wakely <jwakely at redhat dot com>]

This test utility does: "T t = T();" to guarantee value-init, and then
some std::atomic tests have dg-error directives to handle the errors
that happen because atomics are non-copyable. In C++17 there is no
error, because of guaranteed elision, so the dg-errors FAIL.

For C++11 we can us "T t{};" instead, which means there are no errors
for non-copyable types, and we don't get different errors for C++11
and C++17.

	* testsuite/util/testsuite_common_types.h
	(bitwise_assignment_operators): Use direct-initialization for C++11
	and later, to avoid CopyConstructible requirement.
	* testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error
	line numbers.
	* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
	* testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
	Adjust expected errors and line numbers.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document