From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2136) id 9CF623973122; Wed, 17 Jun 2020 21:51:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9CF623973122 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1592430704; bh=pPOHlSET7vr1lbFa9pXKTgFV0LSZCktP0bK435nMmK8=; h=From:To:Subject:Date:From; b=VCgJjO+YNPxgbDYc2iM3urqH58/FYquXNfZ1dC8BgmUsqVeexhAeEqAOUXgixYmU9 Bry/hILvVmGbrG9c4POBsBQQ5VP4NAiZEkT90CAHgh7bloAxDXXHeLn34EPTSvKrMM vEzQqjQHI6coQI+OFa2WuboppKtDBvUhsmboTbNs= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Aldy Hernandez To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc/devel/ranger] libstdc++: Add new testcase for comparison category types X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/devel/ranger X-Git-Oldrev: 764ef40ba185ef9245a209ba9260d1e50bec6934 X-Git-Newrev: 116e3cfc7b8ab8afc4bdbc03db6b194413218af7 Message-Id: <20200617215144.9CF623973122@sourceware.org> Date: Wed, 17 Jun 2020 21:51:44 +0000 (GMT) X-BeenThere: libstdc++-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jun 2020 21:51:44 -0000 https://gcc.gnu.org/g:116e3cfc7b8ab8afc4bdbc03db6b194413218af7 commit 116e3cfc7b8ab8afc4bdbc03db6b194413218af7 Author: Jonathan Wakely Date: Wed May 27 13:13:19 2020 +0100 libstdc++: Add new testcase for comparison category types Comparing a comparison category type to anything except a literal 0 is undefined. This verifies that at least some misuses are diagnosed at compile time. * testsuite/18_support/comparisons/categories/zero_neg.cc: New test. Diff: --- .../18_support/comparisons/categories/zero_neg.cc | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/libstdc++-v3/testsuite/18_support/comparisons/categories/zero_neg.cc b/libstdc++-v3/testsuite/18_support/comparisons/categories/zero_neg.cc new file mode 100644 index 00000000000..0a8af41acb9 --- /dev/null +++ b/libstdc++-v3/testsuite/18_support/comparisons/categories/zero_neg.cc @@ -0,0 +1,46 @@ +// Copyright (C) 2020 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include + +// C++20 [cmp.categories.pre] +// "an argument other than a literal 0 is undefined" + +void +test01() +{ + std::partial_ordering::equivalent == 0; // OK + std::weak_ordering::equivalent == 0; // OK + std::strong_ordering::equivalent == 0; // OK + + std::partial_ordering::equivalent == 1; // { dg-error "invalid conversion" } + std::weak_ordering::equivalent == 1; // { dg-error "invalid conversion" } + std::strong_ordering::equivalent == 1; // { dg-error "invalid conversion" } + + constexpr void* p = nullptr; + std::partial_ordering::equivalent == p; // { dg-error "invalid conversion" } + std::weak_ordering::equivalent == p; // { dg-error "invalid conversion" } + std::strong_ordering::equivalent == p; // { dg-error "invalid conversion" } + + // Ideally these would be ill-formed, but the current code accepts it. + std::partial_ordering::equivalent == nullptr; + std::weak_ordering::equivalent == nullptr; + std::strong_ordering::equivalent == nullptr; +}