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[PATCH] libstdc++: Add move_sentinel, common_iterator and counted_iterator

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, 25 Nov 2019 19:01:50 +0000
Subject: [PATCH] libstdc++: Add move_sentinel, common_iterator and counted_iterator

This implements most of the remaining C++20 additions to the <iterator>
header.

	* include/bits/iterator_concepts.h (ranges::iter_swap): Fix parameter
	types of poison pill overload. Use remove_reference_t when checking
	constraints.
	* include/bits/stl_iterator.h (move_sentinel): Define for C++20.
	(move_iterator): Adjust definitions of nested types for C++20. Add
	hidden friends for move_sentinel operations, iter_move and iter_swap.
	(common_iterator, counted_iterator): Define for C++20.
	* testsuite/24_iterators/move_iterator/cust.cc: New test.
	* testsuite/24_iterators/move_iterator/sentinel.cc: New test.
	* testsuite/24_iterators/common_iterator/1.cc: New test.
	* testsuite/24_iterators/counted_iterator/1.cc: New test.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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