You mean the ternary conditional operator? I see no comma. -----Ursprüngliche Nachricht----- Von:Simon W via Std-Proposals <std-proposals_at_[hidden]> Gesendet:Mi 21.05.2025 10:12 Betreff:[std-proposals] Hope that std::optional and comma expressions can work this way An:std-proposals_at_[hidden]; CC:Simon W <inte2012_at_[hidden]>; The comma expression requires that the expressions on both sides of the colon are of the same type. But I think this syntax should be accepted: bool AllInUniversial(); std::optional<int> r = AllInUniversial() ? 42 : std::nullopt; -- Std-Proposals mailing list Std-Proposals_at_[hidden] https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals