| // RUN: %clang_cc1 -verify -std=c++11 %s |
| |
| // Unlike in C++98, C++11 allows unions to have static data members. |
| |
| union U1 { |
| static constexpr int k1 = 0; |
| static const int k2 = k1; |
| static int k3 = k2; // expected-error {{non-const static data member must be initialized out of line}} |
| static constexpr double k4 = k2; |
| static const double k5 = k4; // expected-error {{requires 'constexpr' specifier}} expected-note {{add 'constexpr'}} |
| int n[k1 + 3]; |
| }; |
| |
| constexpr int U1::k1; |
| constexpr int U1::k2; |
| int U1::k3; |
| |
| const double U1::k4; |
| const double U1::k5; |
| |
| template<typename T> |
| union U2 { |
| static const int k1; |
| static double k2; |
| T t; |
| }; |
| template<typename T> constexpr int U2<T>::k1 = sizeof(U2<T>); |
| template<typename T> double U2<T>::k2 = 5.3; |
| |
| static_assert(U2<int>::k1 == sizeof(int), ""); |
| static_assert(U2<char>::k1 == sizeof(char), ""); |
| |
| union U3 { |
| static const int k; |
| U3() : k(0) {} // expected-error {{does not name a non-static data member}} |
| }; |
| |
| struct S { |
| union { |
| static const int n; // expected-error {{static members cannot be declared in an anonymous union}} |
| int a; |
| int b; |
| }; |
| }; |
| static union { |
| static const int k; // expected-error {{static members cannot be declared in an anonymous union}} |
| int n; |
| }; |