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[PATCH] PR libstdc++/85671 allow copy elision in path concatenation

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: Mon, 7 May 2018 18:26:17 +0100
Subject: [PATCH] PR libstdc++/85671 allow copy elision in path concatenation

By performing the /= operation on a named local variable instead of a
temporary the copy made for the return value can be elided.

	PR libstdc++/85671
	* include/bits/fs_path.h (operator/): Permit copy elision.
	* include/experimental/bits/fs_path.h (operator/): Likewise.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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