clang/test/CXX/class/class.static/class.static.data/p3.cpp

// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++1z %s

struct NonLit { // expected-note 3{{no constexpr constructors}}
  NonLit();
};

struct S {
  static constexpr int a = 0;
  static constexpr int b; // expected-error {{initializ}} expected-note 0-1{{previous}}

  static constexpr int c = 0;
  static const int d;
  static const int d2 = 0;

  static constexpr double e = 0.0; // ok
  static const double f = 0.0; // expected-error {{requires 'constexpr' specifier}} expected-note {{add 'constexpr'}}
  static char *const g = 0; // expected-error {{requires 'constexpr' specifier}}
  static const NonLit h = NonLit(); // expected-error {{must be initialized out of line}}

  static inline int i; // expected-note {{previous}} expected-warning 0-1{{extension}}
  static inline int j; // expected-note {{previous}} expected-warning 0-1{{extension}}
  static constexpr int k = 0;
};

constexpr int S::a;
constexpr int S::b = 0; // expected-error 0-1{{redefinition}}

const int S::c;
constexpr int S::d = 0;
constexpr int S::d2;

int S::i; // expected-error {{redefinition}}
int S::j; // expected-error {{redefinition}}
const int S::k; // ok (deprecated)

template<typename T>
struct U {
  static constexpr int a = 0;
  static constexpr int b; // expected-error {{initializ}}
  static constexpr NonLit h = NonLit(); // expected-error {{cannot have non-literal type 'const NonLit'}}
  static constexpr T c = T(); // expected-error {{cannot have non-literal type}}
  static const T d;
};

template<typename T> constexpr T U<T>::d = T(); // expected-error {{non-literal type 'const NonLit'}}

U<int> u1;
U<NonLit> u2; // expected-note {{here}}

static_assert(U<int>::a == 0, "");

constexpr int outofline = (U<NonLit>::d, 0); // expected-note {{here}}