Fix: Clang 19 -Wc++20-extensions warning #2910 #2934
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-Added INTERNAL_CATCH_TEMPLATE_TEST_CASE_HANDLE_EMPTY macro for Clang 19+ - Modified template test case macro expansion path for Clang 19+ - Keeps original behavior for other compilers and older Clang versions
…chorg#2910) - Added INTERNAL_CATCH_TEMPLATE_TEST_CASE_HANDLE_EMPTY macro for Clang 19+ - Modified template test case macro expansion path for Clang 19+ - Keeps original behavior for other compilers and older Clang versions
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Description
This PR fixes an issue where Clang 19 reports a
-Wc++20-extensionswarning when expanding theTEMPLATE_TEST_CASEmacro family. The warning occurs because passing no arguments to the...parameter of a variadic macro was technically a language extension before C++20, and Clang 19 enforces this more strictly.The fix introduces a special handling path for Clang 19+ that modifies how template test case macros are expanded, while maintaining the existing behavior for other compilers and older Clang versions. This allows the code to compile without warnings on Clang 19 while preserving full functionality and backward compatibility.
Key changes:
INTERNAL_CATCH_TEMPLATE_TEST_CASE_HANDLE_EMPTYmacro for Clang 19+ specific handlingCloses #2910