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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
// XFAIL: *
template <typename T, typename U>
struct same_type { static const bool value = false; };
template <typename T>
struct same_type<T, T> { static const bool value = true; };
namespace std {
typedef decltype(sizeof(int)) size_t;
// libc++'s implementation
template <class _E>
class initializer_list
{
const _E* __begin_;
size_t __size_;
initializer_list(const _E* __b, size_t __s)
: __begin_(__b),
__size_(__s)
{}
public:
typedef _E value_type;
typedef const _E& reference;
typedef const _E& const_reference;
typedef size_t size_type;
typedef const _E* iterator;
typedef const _E* const_iterator;
initializer_list() : __begin_(nullptr), __size_(0) {}
size_t size() const {return __size_;}
const _E* begin() const {return __begin_;}
const _E* end() const {return __begin_ + __size_;}
};
}
namespace objects {
struct X1 { X1(int); };
struct X2 { explicit X2(int); };
template <int N>
struct A {
A() { static_assert(N == 0, ""); }
A(int, double) { static_assert(N == 1, ""); }
A(std::initializer_list<int>) { static_assert(N == 3, ""); }
};
template <int N>
struct D {
D(std::initializer_list<int>) { static_assert(N == 0, ""); } // expected-note 1 {{candidate}}
D(std::initializer_list<double>) { static_assert(N == 1, ""); } // expected-note 1 {{candidate}}
};
template <int N>
struct E {
E(int, int) { static_assert(N == 0, ""); }
E(X1, int) { static_assert(N == 1, ""); }
};
void overload_resolution() {
{ A<0> a{}; }
{ A<0> a = {}; }
// Narrowing conversions don't affect viability. The next two choose
// the initializer_list constructor.
{ A<3> a{1, 1.0}; } // expected-error {{narrowing conversion}}
{ A<3> a = {1, 1.0}; } // expected-error {{narrowing conversion}}
{ A<3> a{1, 2, 3, 4, 5, 6, 7, 8}; }
{ A<3> a = {1, 2, 3, 4, 5, 6, 7, 8}; }
{ A<3> a{1, 2, 3, 4, 5, 6, 7, 8}; }
{ A<3> a{1, 2}; }
{ D<0> d{1, 2, 3}; }
{ D<1> d{1.0, 2.0, 3.0}; }
{ D<-1> d{1, 2.0}; } // expected-error {{ambiguous}}
{ E<0> e{1, 2}; }
}
void explicit_implicit() {
{ X1 x{0}; }
{ X1 x = {0}; }
{ X2 x{0}; }
{ X2 x = {0}; } // expected-error {{explicit}}
}
struct C {
C();
C(int, double);
C(int, int);
C(std::initializer_list<int>);
int operator[](C);
};
C function_call() {
void takes_C(C);
takes_C({1, 1.0});
C c;
c[{1, 1.0}];
return {1, 1.0};
}
void inline_init() {
(void) A<1>{1, 1.0};
(void) new A<1>{1, 1.0};
}
struct B {
B(C, int, C);
};
void nested_init() {
B b{{1, 1.0}, 2, {3, 4, 5, 6, 7}};
}
}
namespace litb {
// invalid
struct A { int a[2]; A():a({1, 2}) { } }; // expected-error {{}}
// invalid
int a({0}); // expected-error {{}}
// invalid
int const &b({0}); // expected-error {{}}
struct C { explicit C(int, int); C(int, long); };
// invalid
C c({1, 2}); // expected-error {{}}
// valid (by copy constructor).
C d({1, 2L});
// valid
C e{1, 2};
struct B {
template<typename ...T>
B(std::initializer_list<int>, T ...);
};
// invalid (the first phase only considers init-list ctors)
// (for the second phase, no constructor is viable)
B f{1, 2, 3};
// valid (T deduced to <>).
B g({1, 2, 3});
}
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