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// PR c++/91353 - P1331R2: Allow trivial default init in constexpr contexts.
// { dg-do compile { target c++20 } }
// This bullet in [dcl.constexpr] is now gone:
// - every non-static data member and base class sub-object shall be initialized
struct A {
int i;
constexpr A(int _i) { i = _i; }
};
struct B {
int i;
constexpr B() { }
};
// Anonymous members.
struct E {
int a;
union {
char b;
__extension__ struct {
double c;
long d;
};
union {
char e;
void *f;
};
};
__extension__ struct {
long long g;
__extension__ struct {
int h;
double i;
};
union {
char *j;
E *k;
};
};
// Completely initialized.
constexpr E(int(&)[1]) : a(), b(), g(), h(), i(), j() {}
constexpr E(int(&)[3]) : a(), e(), g(), h(), i(), k() {}
constexpr E(int(&)[7]) : a(), b(), g(), h(), i(), j() {}
constexpr E(int(&)[8]) : a(), f(), g(), h(), i(), k() {}
constexpr E(int(&)[9]) : a(), c(), d(), g(), h(), i(), k() {}
// Missing d, i, j/k union init.
constexpr E(int(&)[2]) : a(), c(), g(), h() {}
// Missing h, j/k union init.
constexpr E(int(&)[4]) : a(), c(), d(), g(), i() {}
// Missing b/c/d/e/f union init.
constexpr E(int(&)[5]) : a(), g(), h(), i(), k() {}
// Missing a, b/c/d/e/f union, g/h/i/j/k struct init.
constexpr E(int(&)[6]) {}
};
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