// { dg-do compile } // { dg-options "-std=c++2a" } struct A { constexpr A () {} A (A const&) = delete; // { dg-bogus "declared here" } }; template constexpr void foo () { T t; T u = t; } template consteval void bar () { T t; T u = t; // { dg-bogus "use of deleted function" } } using B = decltype (foo ()); using C = decltype (bar ()); // { dg-bogus "required from here" }