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Constexpr matching support in IsEmpty and SizeIs matchers

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This commit is contained in:
Martin Hořeňovský
2026-05-12 11:05:29 +02:00
parent 651247c7f4
commit 3cdae5faf0
4 changed files with 31 additions and 16 deletions
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tests/SelfTest/UsageTests/MatchersConstexpr.tests.cpp
+12
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@@ -8,6 +8,9 @@
#include <catch2/catch_test_macros.hpp>
#include <catch2/matchers/catch_matchers_templated.hpp>
#include <catch2/matchers/catch_matchers_container_properties.hpp>
#include <array>
#if defined( CATCH_INTERNAL_CONSTEXPR_MATCHERS_ENABLED )
@@ -34,6 +37,15 @@ TEST_CASE( "Constexpr support for matchers", "[constexpr][matchers][approvals]"
STATIC_REQUIRE_THAT( 1, MatchAll() );
}
TEST_CASE( "IsEmpty and HasSize matchers can be used in constexpr contexts",
"[constexpr][matchers][approvals]" ){
static constexpr std::array<int, 0> empty{};
STATIC_REQUIRE_THAT( empty, Catch::Matchers::IsEmpty() );
static constexpr int arr[1] = { 2 };
STATIC_REQUIRE_THAT( arr, Catch::Matchers::SizeIs( 1 ) );
STATIC_REQUIRE_THAT( arr, Catch::Matchers::SizeIs( MatchAll() ) );
}
// Combining matchers needs C++26 and P2738, so they are in separate preprocessor block
# if __cpp_constexpr >= 202306L