Tested x86_64-linux. Pushed to trunk. -- >8 --
libstdc++-v3/ChangeLog: * include/std/format (format_parse_context::check_dynamic_spec): Add [[maybe_unused]] attribute and comment. --- libstdc++-v3/include/std/format | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libstdc++-v3/include/std/format b/libstdc++-v3/include/std/format index 3280dadfb90..52243eb5479 100644 --- a/libstdc++-v3/include/std/format +++ b/libstdc++-v3/include/std/format @@ -4323,6 +4323,11 @@ namespace __format constexpr void basic_format_parse_context<_CharT>::check_dynamic_spec(size_t __id) noexcept { + // This call enforces the Mandates: condition that _Ts contains valid + // types and each type appears at most once. It could be a static_assert + // but this way failures give better diagnostics, due to calling the + // non-constexpr __invalid_dynamic_spec function. + [[maybe_unused]] constexpr bool __ok = __check_dynamic_spec_types<_Ts...>(); if consteval { -- 2.46.0