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[PATCH] Define __cpp_lib_tuple_element_t in <tuple> not <utility>

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: Thu, 14 Jun 2018 15:00:55 +0100
Subject: [PATCH] Define __cpp_lib_tuple_element_t in <tuple> not <utility>

During the review of P0941R2 in Rapperswil we noticed that SD-6 puts
the macro __cpp_lib_tuple_element_t in <utility>, but it should be in
<tuple>.

	* include/std/tuple (__cpp_lib_tuple_element_t): Move feature test
	macro from <utility> and change type to long.
	* include/std/utility (__cpp_lib_tuple_element_t): Remove.
	* testsuite/20_util/tuple/tuple_element_t.cc: Check for feature test
	macro.

Tested x86_64-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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- Re: [PATCH] Define __cpp_lib_tuple_element_t in <tuple> not <utility>
  - From: Jonathan Wakely

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