// PR c++/102753 // { dg-do compile { target c++20 } } // { dg-options "" } struct S { constexpr S () : s (0) {} consteval int foo () { return 1; } virtual consteval int bar () { return 2; } int s; }; consteval int foo () { return 42; } consteval auto baz () { return foo; } consteval auto qux () { return &S::foo; } consteval auto corge () { return &S::bar; } constexpr int bar () { S s; if consteval { // { dg-warning "'if consteval' only available with" "" { target c++20_only } } constexpr auto fn1 = foo; // { dg-error "constant evaluation returns address of immediate function" } constexpr auto fn2 = &foo; // { dg-error "constant evaluation returns address of immediate function" } constexpr auto fn3 = &S::foo; // { dg-error "constant evaluation returns address of immediate function" } constexpr auto fn4 = &S::bar; // { dg-error "constant evaluation returns address of immediate function" } constexpr auto fn5 = baz (); // { dg-error "immediate evaluation returns address of immediate function" } constexpr auto fn6 = qux (); // { dg-error "immediate evaluation returns address of immediate function" } constexpr auto fn7 = corge (); // { dg-error "immediate evaluation returns address of immediate function" } return fn1 () + fn2 () + (s.*fn3) () + (s.*fn4) () + fn5 () + (s.*fn6) () + (s.*fn7) (); } return 0; } auto a = bar ();