Ville mentioned a way to pass a concept as a (template) parameter. You can also pass the reflected std::meta::info of a concept as a function parameter:     template <class T> concept Integral = std::integral<T>; consteval bool satisfies(std::meta::info concept_r, std::meta::info type_r) {     std::meta::info result_r = std::meta::substitute(concept_r, { type_r });     return std::meta::extract<bool>(result_r); }     // usage: satisfies(^^Integral, ^^int)     What would you want to do with a concept as an entity or inside the function?         -----Ursprüngliche Nachricht----- Von:amngis_21d38 via Std-Proposals <std-proposals_at_[hidden]> Gesendet:Sa 20.06.2026 01:26 Betreff:[std-proposals] Entity concept An:std-proposals <std-proposals_at_[hidden]>; CC:amngis_21d38 <amngis_21d38_at_[hidden]>; Why don't C++ designers turn concepts into entities, design a function to convert a concept into a class or make aconstexpr function capable of having a concept parameter? -- Std-Proposals mailing list Std-Proposals_at_[hidden] https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals