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[PATCH] PR libstdc++/88840 delay evaluation of constant until type is complete

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Cc: Marc Glisse <marc dot glisse at inria dot fr>
Date: Thu, 24 Jan 2019 15:39:25 +0000
Subject: [PATCH] PR libstdc++/88840 delay evaluation of constant until type is complete

Clang fails to compile std::vector<Incomplete> because the static member
__use_relocate cannot be evaluated for an incomplete type. Replace with
a static member function that will not be odr-used until needed, by
which point the type must be complete.

	PR libstdc++/88840
	* include/bits/stl_vector.h (vector::__use_relocate): Replace static
	data member with static member function _S_use_relocate().
	* include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
	(vector::_M_default_append): Use _S_use_relocate() instead of
	__use_relocate.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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