c++: print stub object as std::declval

If the result of build_stub_object gets printed by %E it looks something
like '(A&&)1', which seems confusing.  Let's instead print it as
'std::declval<A>()' since that's how the library writes the same idea.

gcc/cp/ChangeLog:

	* method.cc (is_stub_object): New.
	* cp-tree.h (is_stub_object): Declare.
	* error.cc (dump_expr): Use it.

gcc/testsuite/ChangeLog:

	* g++.dg/gomp/declare-variant-3.C: Update diagnostic.
	* g++.dg/gomp/declare-variant-5.C: Likewise.

0 files changed, 0 insertions, 0 deletions