catch3/src/Progmasoft/Catch3/Detail/InvalidArgument.hpp, branch build/cpp17 Progmasoft Catch3: an independently maintained C++17 test framework with a parallel runner, property checks, snapshots and structured results. Support exception-free clients in Catch3 property headers 2026-09-29T16:54:42+00:00 Leitwolf11 2026-09-29T16:54:42+00:00 a870d0a4b37c2840db4eeaaaaf57b4eab4db75d3 Preserve the existing exception-throwing and exception-catching API when language exceptions are enabled. Compile the property evaluator, shrinker and value formatter without try/catch for clients using -fno-exceptions, and fail loudly on invalid generator range or missing callbacks instead of requiring throw expressions in those translation units. Export the new diagnostic helper through Bazel and Meson header installations. This changes neither the upstream Catch2 implementation nor its compiler flags. Validation: Clang++ C++20 syntax checks passed for property generators with exceptions both disabled and enabled; changed headers were formatted and git diff --check passed. The consuming compiler's Linux/Windows/macOS CI will verify the integration. 
Preserve the existing exception-throwing and exception-catching API when language exceptions are enabled. Compile the property evaluator, shrinker and value formatter without try/catch for clients using -fno-exceptions, and fail loudly on invalid generator range or missing callbacks instead of requiring throw expressions in those translation units.

Export the new diagnostic helper through Bazel and Meson header installations. This changes neither the upstream Catch2 implementation nor its compiler flags.

Validation: Clang++ C++20 syntax checks passed for property generators with exceptions both disabled and enabled; changed headers were formatted and git diff --check passed. The consuming compiler's Linux/Windows/macOS CI will verify the integration.