1 2 3 4 5 6 7 8 9 10 11 12
// { dg-do compile { target c++11 } } struct A { int i; mutable int j; }; constexpr A a = { 0, 1 }; constexpr A b = a; // { dg-error "mutable" } constexpr int i = a.i; constexpr int j = a.j; // { dg-error "mutable" }