llvm-project/clang/test/SemaCXX/cxx0x-class.cpp

// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s 

int vs = 0;

class C {
public:
  struct NestedC {
    NestedC(int);
  };

  int i = 0;
  static int si = 0; // expected-error {{non-const static data member must be initialized out of line}}
  static const NestedC ci = 0; // expected-error {{static data member of type 'const C::NestedC' must be initialized out of line}}
  static const int nci = vs; // expected-error {{in-class initializer for static data member is not a constant expression}}
  static const int vi = 0;
  static const volatile int cvi = 0; // expected-error {{static const volatile data member must be initialized out of line}}
};

namespace rdar8367341 {
  float foo(); // expected-note {{here}}

  struct A {
    static const float x = 5.0f; // expected-warning {{GNU extension}} expected-note {{use 'constexpr' specifier to silence this warning}}
    static const float y = foo(); // expected-warning {{GNU extension}} expected-note {{use 'constexpr' specifier to silence this warning}} expected-error {{in-class initializer for static data member is not a constant expression}}
    static constexpr float x2 = 5.0f;
    static constexpr float y2 = foo(); // expected-error {{must be initialized by a constant expression}} expected-note {{non-constexpr function 'foo'}}
  };
}