path: root/clang/test/CXX/dcl.decl/dcl.init/dcl.init.list/p3.cpp

// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
// RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify %s
// RUN: %clang_cc1 -std=c++1z -fsyntax-only -verify %s

namespace std {
  typedef decltype(sizeof(int)) size_t;

  template <typename E>
  struct initializer_list
  {
    const E *p;
    size_t n;
    initializer_list(const E *p, size_t n) : p(p), n(n) {}
  };

  struct string {
    string(const char *);
  };

  template<typename A, typename B>
  struct pair {
    pair(const A&, const B&);
  };
}

namespace bullet1 {
  double ad[] = { 1, 2.0 };
  int ai[] = { 1, 2.0 };  // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}}

  struct S2 {
    int m1;
    double m2, m3;
  };

  S2 s21 = { 1, 2, 3.0 };
  S2 s22 { 1.0, 2, 3 };  // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}}
  S2 s23 { };
}

namespace bullet4_example1 {
  struct S {
    S(std::initializer_list<double> d) {}
    S(std::initializer_list<int> i) {}
    S() {}
  };

  S s1 = { 1.0, 2.0, 3.0 };
  S s2 = { 1, 2, 3 };
  S s3 = { };
}

namespace bullet4_example2 {
  struct Map {
    Map(std::initializer_list<std::pair<std::string,int>>) {}
  };

  Map ship = {{"Sophie",14}, {"Surprise",28}};
}

namespace bullet4_example3 {
  struct S {
    S(int, double, double) {}
    S() {}
  };

  S s1 = { 1, 2, 3.0 };
  S s2 { 1.0, 2, 3 }; // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}}
  S s3 {};
}

namespace bullet5 {
  int x1 {2};
  int x2 {2.0};  // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}}
}

namespace bullet6 {
  struct S {
    S(std::initializer_list<double>) {}
    S(const std::string &) {}
  };

  const S& r1 = { 1, 2, 3.0 };
  const S& r2 = { "Spinach" };
  S& r3 = { 1, 2, 3 };  // expected-error {{non-const lvalue reference to type 'S' cannot bind to an initializer list temporary}}
  const int& i1 = { 1 };
  const int& i2 = { 1.1 };  // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} expected-warning {{implicit conversion}}
  const int (&iar)[2] = { 1, 2 };

  // We interpret "class type with a default constructor" as including the case
  // where a default constructor is inherited.
  struct X {
    X();
    X(std::initializer_list<int>) = delete;
  };
  struct Y : X {
    using X::X;
    Y(int);
  };
  Y y1{};
  void use() { Y y; }
  Y y2{};
}

namespace bullet7 {
  int** pp {};
}

namespace bullet8 {
  struct A { int i; int j; };
  A a1 { 1, 2 };
  A a2 { 1.2 };  // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} expected-warning {{implicit conversion}}

  struct B {
    B(std::initializer_list<int> i) {}
  };
  B b1 { 1, 2 };
  B b2 { 1, 2.0 }; // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}}

  struct C {
    C(int i, double j) {}
  };
  C c1 = { 1, 2.2 };
  // FIXME: Suppress the narrowing warning in the cases where we issue a narrowing error.
  C c2 = { 1.1, 2 }; // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} expected-warning {{implicit conversion}}

  int j { 1 };
  int k { };
}

namespace rdar13395022 {
  struct MoveOnly { // expected-note {{candidate}}
    MoveOnly(MoveOnly&&); // expected-note 2{{copy constructor is implicitly deleted because}} expected-note {{candidate}}
  };

  void test(MoveOnly mo) {
    auto &&list1 = {mo}; // expected-error {{call to implicitly-deleted copy constructor}} expected-note {{in initialization of temporary of type 'std::initializer_list}}
    MoveOnly (&&list2)[1] = {mo}; // expected-error {{call to implicitly-deleted copy constructor}} expected-note {{in initialization of temporary of type 'MoveOnly[1]'}}
    std::initializer_list<MoveOnly> &&list3 = {};
    MoveOnly (&&list4)[1] = {}; // expected-error {{no matching constructor}}
    // expected-note@-1 {{in implicit initialization of array element 0 with omitted initializer}}
    // expected-note@-2 {{in initialization of temporary of type 'MoveOnly[1]' created to list-initialize this reference}}
  }
}

namespace cxx1z_direct_enum_init {
  enum A {};
  enum B : char {};
  enum class C {};
  enum class D : char {};
  enum class E : char { k = 5 };

  template<typename T> void good() {
    (void)T{0};
    T t1{0};
    T t2 = T{0};

    struct S { T t; };
    S s{T{0}};

    struct U { T t{0}; } u; // expected-note 0+{{instantiation of}}

    struct V { T t; V() : t{0} {} }; // expected-note 0+{{instantiation of}}

    void f(T);
    f(T{0});

    char c;
    auto t3 = T{c};
  }
#if __cplusplus <= 201402L
  // expected-error@-18 5{{cannot initialize}}
  // expected-error@-18 5{{cannot initialize}}
  // expected-error@-18 5{{cannot initialize}}
  //
  //
  // expected-error@-18 5{{cannot initialize}}
  //
  // expected-error@-18 5{{cannot initialize}}
  //
  // expected-error@-18 5{{cannot initialize}}
  //
  //
  // expected-error@-18 5{{cannot initialize}}
  //
  //
  // expected-error@-18 5{{cannot initialize}}
#else
  // expected-error@-35 {{cannot initialize}}
  // expected-error@-35 {{cannot initialize}}
  // expected-error@-35 {{cannot initialize}}
  //
  //
  // expected-error@-35 {{cannot initialize}}
  //
  // expected-error@-35 {{cannot initialize}}
  //
  // expected-error@-35 {{cannot initialize}}
  //
  //
  // expected-error@-35 {{cannot initialize}}
  //
  //
  // expected-error@-35 {{cannot initialize}}
#endif

  template<typename T> void bad() {
    T t = {0};

    struct S { T t; };
    S s1{0};
    S s2{{0}};

    struct U { T t = {0}; } u; // expected-note 0+{{instantiation of}}

    struct V { T t; V() : t({0}) {} }; // expected-note 0+{{instantiation of}}

    void f(T); // expected-note 0+{{passing argument}}
    f({0});
  }
  // expected-error@-13 5{{cannot initialize}}
  //
  //
  // expected-error@-13 5{{cannot initialize}}
  // expected-error@-13 5{{cannot initialize}}
  //
  // expected-error@-13 5{{cannot initialize}}
  //
  // expected-error@-13 5{{cannot initialize}}
  //
  //
  // expected-error@-13 5{{cannot initialize}}

  template<typename T> void ugly() {
    extern char c;
    T t1{char('0' + c)};
    T t2{'0' + c};
    T t3{1234};
  }
#if __cplusplus <= 201402L
  // expected-error@-5 4{{cannot initialize}}
  // expected-error@-5 4{{cannot initialize}}
  // expected-error@-5 4{{cannot initialize}}
#else
  // expected-error@-8 3{{non-constant-expression cannot be narrowed}}
  // expected-error@-8 3{{constant expression evaluates to 1234 which cannot be narrowed}} expected-warning@-8 {{changes value}}
#endif

  void test() {
    good<A>(); // expected-note 4{{instantiation of}}
    good<B>();
    good<C>();
    good<D>();
    good<E>();
#if __cplusplus <= 201402L
    // expected-note@-5 4{{instantiation of}}
    // expected-note@-5 4{{instantiation of}}
    // expected-note@-5 4{{instantiation of}}
    // expected-note@-5 4{{instantiation of}}
#endif

    bad<A>(); // expected-note 4{{instantiation of}}
    bad<B>(); // expected-note 4{{instantiation of}}
    bad<C>(); // expected-note 4{{instantiation of}}
    bad<D>(); // expected-note 4{{instantiation of}}
    bad<E>(); // expected-note 4{{instantiation of}}

    ugly<B>(); // expected-note {{instantiation of}}
    ugly<C>(); // ok
    ugly<D>(); // expected-note {{instantiation of}}
    ugly<E>(); // expected-note {{instantiation of}}
#if __cplusplus <= 201402L
    // expected-note@-4 {{instantiation of}}
#else
    (void)B{0.0}; // expected-error {{type 'double' cannot be narrowed}}
#endif
  }

#if __cplusplus > 201402L
  enum class F : unsigned {};
  F f1(unsigned x) { return F{x}; }
  F f2(const unsigned x) { return F{x}; }
  F f3(bool x) { return F{x}; }
  F f4(const bool x) { return F{x}; }
#endif
}