// PR c++/91264 | |
// { dg-do compile { target c++14 } } | |
struct A { | |
int n; | |
constexpr A() : n(1) { n = 2; } | |
}; | |
struct B { | |
const A a; | |
constexpr B(bool b) { | |
if (b) | |
const_cast<A &>(a).n = 3; // { dg-error "modifying a const object" } | |
} | |
}; | |
constexpr B b(false); | |
static_assert(b.a.n == 2, ""); | |
constexpr B b2(true); // { dg-message "in .constexpr. expansion of " } | |
// { dg-message "originally declared" "" { target *-*-* } .-1 } | |
static_assert((b2.a.n, 1), ""); |