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[PATCH] libstdc++/72745 add static assertion for invalid tuple access

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: Sun, 31 Jul 2016 18:10:04 +0100
Subject: [PATCH] libstdc++/72745 add static assertion for invalid tuple access
Authentication-results: sourceware.org; auth=none

	PR libstdc++/72745
	* include/std/array (get): Use positive message for static assertions.
	* include/std/functional (_Safe_tuple_element_t): Fix indentation.
	* include/std/tuple (tuple_element<I, tuple<>>): Add partial
	specialization for invalid indices, with static assertion.
	* testsuite/20_util/tuple/element_access/get_neg.cc: New test.

This improves the diagnostic for std::get<1>( tuple<int>{} ) by adding
a static assertion that the index is in range.

Tested powerpc64-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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- Re: [PATCH] libstdc++/72745 add static assertion for invalid tuple access
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