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[PATCH] PR libstdc++/79467 use lvalues in is_callable check

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Sat, 11 Feb 2017 21:11:12 +0000
Subject: [PATCH] PR libstdc++/79467 use lvalues in is_callable check
Authentication-results: sourceware.org; auth=none

These new static assertions fail if the deleter insists on lvalues (I
don't know why somebody would do that, but it caused a build failure
for fuse-encfs). Since the deleter is invoked as an lvalue and passed
an lvalue, this makes the assertion check the right thing.

	PR libstdc++/79467
	* include/bits/shared_ptr_base.h (__shared_ptr(_Yp*, _Deleter))
	(__shared_ptr(_Yp*, _Deleter, _Alloc)): Use lvalue types in
	__is_callable check.
	* testsuite/20_util/shared_ptr/cons/79467.cc: New.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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