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https://github.com/catchorg/Catch2.git
synced 2026-07-07 09:00:56 +02:00
Martin Hořeňovský
651247c7f4
To make this all work, I had to remove the stringification cache from matchers. In theory, this can cause performance penalty in cases where single matcher instance is stringified multiple times, but in practice this does not happen much, and the difference is surprisingly small anyway, because the performance of stringification is already horrible and full of allocating strings just to throw them away. The matcher combinators need P2738 from C++26 to be `constexpr`. Closes #3091
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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#include <catch2/catch_test_macros.hpp>
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#include <catch2/matchers/catch_matchers_templated.hpp>
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#if defined( CATCH_INTERNAL_CONSTEXPR_MATCHERS_ENABLED )
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namespace {
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struct MatchAllMatcher final : public Catch::Matchers::MatcherGenericBase {
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public:
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template <typename Any>
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constexpr bool match( Any&& ) const {
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return true;
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}
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std::string describe() const override {
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using namespace std::string_literals;
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return "Matches anything"s;
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}
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};
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constexpr MatchAllMatcher MatchAll() { return MatchAllMatcher(); }
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} // namespace
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TEST_CASE( "Constexpr support for matchers", "[constexpr][matchers][approvals]" ) {
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STATIC_REQUIRE( MatchAll().match( 1 ) );
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STATIC_REQUIRE_THAT( 1, MatchAll() );
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}
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// Combining matchers needs C++26 and P2738, so they are in separate preprocessor block
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# if __cpp_constexpr >= 202306L
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TEST_CASE("Constexpr support for combining matchers",
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"[constexpr][matchers][approvals]") {
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STATIC_REQUIRE( ( MatchAll() && MatchAll() ).match( 1 ) );
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STATIC_REQUIRE( ( MatchAll() || MatchAll() ).match( 1 ) );
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STATIC_REQUIRE( ( !!MatchAll() ).match( 1 ) );
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STATIC_REQUIRE_THAT( 1, MatchAll() && MatchAll() );
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STATIC_REQUIRE_THAT( 1, MatchAll() || MatchAll() );
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STATIC_REQUIRE_THAT( 1, !!MatchAll() );
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}
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#endif // __cpp_constexpr >= 202306L
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#endif
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