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✨ Support C++26 static_assert #193

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Merged
elbeno merged 1 commit into from
Feb 19, 2025
Merged

✨ Support C++26 static_assert #193

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9 changes: 9 additions & 0 deletions include/stdx/static_assert.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,14 @@ template <ct_string Fmt, auto... Args> constexpr auto static_format() {
} // namespace v1
} // namespace stdx

#if __cpp_static_assert >= 202306L
#define STATIC_ASSERT(cond, ...) \
[]<bool B>() -> bool { \
static_assert( \
B, std::string_view{stdx::detail::static_format<__VA_ARGS__>()}); \
return B; \
}.template operator()<cond>()
#else
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define STATIC_ASSERT(cond, ...) \
[]<bool B>() -> bool { \
Expand All @@ -46,3 +54,4 @@ template <ct_string Fmt, auto... Args> constexpr auto static_format() {
}.template operator()<cond>()

#endif
#endif
14 changes: 14 additions & 0 deletions test/fail/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,16 @@ function(add_formatted_error_tests)
add_fail_tests(static_assert_format)
endfunction()

function(add_26_formatted_error_tests)
add_compile_fail_test("static_assert.cpp" NAME static_assert_26 LIBRARIES
stdx)
add_compile_fail_test("static_assert_format.cpp" NAME
static_assert_format_26 LIBRARIES stdx)
target_compile_features(EXPECT_FAIL.static_assert_26 PRIVATE cxx_std_26)
target_compile_features(EXPECT_FAIL.static_assert_format_26
PRIVATE cxx_std_26)
endfunction()

if(${CMAKE_CXX_STANDARD} GREATER_EQUAL 20)
if(${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang"
AND ${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER_EQUAL 15)
Expand All @@ -42,6 +52,10 @@ if(${CMAKE_CXX_STANDARD} GREATER_EQUAL 20)
add_formatted_error_tests()
endif()

if("cxx_std_26" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
add_26_formatted_error_tests()
endif()

add_fail_tests(
atomic_bool_dec
dynamic_span_no_ct_capacity
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