1// RUN: %clang_cc1 %s -Wno-uninitialized -std=c++11 -fsyntax-only -verify
2
3struct A {
4  constexpr A() : a(b + 1), b(a + 1) {} // expected-note {{outside its lifetime}}
5  int a;
6  int b;
7};
8struct B {
9  A a;
10};
11
12constexpr A a; // ok, zero initialization precedes static initialization
13void f() {
14  constexpr A a; // expected-error {{constant expression}} expected-note {{in call to 'A()'}}
15}
16
17constexpr B b1; // expected-error {{without a user-provided default constructor}}
18constexpr B b2 = B(); // ok
19static_assert(b2.a.a == 1, "");
20static_assert(b2.a.b == 2, "");
21
22struct C {
23  int c;
24};
25struct D : C { int d; };
26constexpr C c1; // expected-error {{without a user-provided default constructor}}
27constexpr C c2 = C(); // ok
28constexpr D d1; // expected-error {{without a user-provided default constructor}}
29constexpr D d2 = D(); // ok with DR1452
30static_assert(D().c == 0, "");
31static_assert(D().d == 0, "");
32
33struct V : virtual C {};
34template<typename T> struct Z : T {
35  constexpr Z() : V() {}
36};
37constexpr int n = Z<V>().c; // expected-error {{constant expression}} expected-note {{virtual base class}}
38