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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r11-9122] libstdc++: Fix test that fails for C++20 Date: Tue, 12 Oct 2021 16:24:08 +0000 (GMT) [thread overview] Message-ID: <20211012162408.EC85A385700D@sourceware.org> (raw) https://gcc.gnu.org/g:8104d4fff6202dabcb2eef7406f64d26f97f341d commit r11-9122-g8104d4fff6202dabcb2eef7406f64d26f97f341d Author: Jonathan Wakely <jwakely@redhat.com> Date: Tue Oct 12 15:39:18 2021 +0100 libstdc++: Fix test that fails for C++20 Restore the test for 'a < a' that was removed by r12-2537 because it is ill-formed. We still want to test operator< for tuple, we just need to not use std::nullptr_t in that tuple type. libstdc++-v3/ChangeLog: * testsuite/20_util/tuple/comparison_operators/overloaded.cc: Restore test for operator<. (cherry picked from commit 727137d6ca6d3d401a0c1b4df6b9aae8b97dacd5) Diff: --- .../testsuite/20_util/tuple/comparison_operators/overloaded.cc | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/overloaded.cc b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/overloaded.cc index a25c374a932..a9bc2c7dfb5 100644 --- a/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/overloaded.cc +++ b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/overloaded.cc @@ -48,4 +48,9 @@ TwistedLogic operator<(const Compares&, const Compares&) { return {false}; } auto a = std::make_tuple(nullptr, Compares{}, 2, 'U'); auto b = a == a; -auto c = a < a; + +#if ! __cpp_lib_three_way_comparison +// Not valid in C++20, because TwistedLogic doesn't model boolean-testable. +auto c = std::make_tuple("", Compares{}, 2, 'U'); +auto d = c < c; +#endif
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