libstdc++: Implement LWG 3324 for [cmp.alg] function objects (LWG 3324)

[platform/upstream/gcc.git] / libstdc++-v3 / ChangeLog

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
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--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,14 @@
 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
 
+       * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
+       (strong_order, weak_order, partial_order): Replace uses of <=> with
+       compare_three_way function object (LWG 3324).
+       * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
+       equality operator so that X satisfies three_way_comparable.
+       * testsuite/18_support/comparisons/algorithms/strong_order.cc:
+       Likewise.
+       * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
+
        * include/bits/unique_ptr.h (operator<=>): Define for C++20.
        * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
        * testsuite/20_util/default_delete/void_neg.cc: Likewise.