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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s -pedantic-errors
struct one { char c[1]; };
struct two { char c[2]; };
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 integral {
void initialization() {
{ const int a{}; static_assert(a == 0, ""); }
{ const int a = {}; static_assert(a == 0, ""); }
{ const int a{1}; static_assert(a == 1, ""); }
{ const int a = {1}; static_assert(a == 1, ""); }
{ const int a{1, 2}; } // expected-error {{excess elements}}
{ const int a = {1, 2}; } // expected-error {{excess elements}}
// FIXME: Redundant warnings.
{ const short a{100000}; } // expected-error {{cannot be narrowed}} expected-note {{insert an explicit cast}} expected-warning {{changes value}}
{ const short a = {100000}; } // expected-error {{cannot be narrowed}} expected-note {{insert an explicit cast}} expected-warning {{changes value}}
{ if (const int a{1}) static_assert(a == 1, ""); }
{ if (const int a = {1}) static_assert(a == 1, ""); }
}
int direct_usage() {
int ar[10];
(void) ar[{1}]; // expected-error {{array subscript is not an integer}}
return {1}; // expected-warning {{braces around scalar init}}
}
void inline_init() {
auto v = int{1};
(void) new int{1};
}
struct A {
int i;
A() : i{1} {}
};
void function_call() {
void takes_int(int);
takes_int({1}); // expected-warning {{braces around scalar init}}
}
void overloaded_call() {
one overloaded(int);
two overloaded(double);
static_assert(sizeof(overloaded({0})) == sizeof(one), "bad overload"); // expected-warning {{braces around scalar init}}
static_assert(sizeof(overloaded({0.0})) == sizeof(two), "bad overload"); // expected-warning {{braces around scalar init}}
void ambiguous(int, double); // expected-note {{candidate}}
void ambiguous(double, int); // expected-note {{candidate}}
ambiguous({0}, {0}); // expected-error {{ambiguous}}
void emptylist(int);
void emptylist(int, int, int);
emptylist({});
emptylist({}, {}, {});
}
void edge_cases() {
int a({0}); // expected-error {{cannot initialize non-class type 'int' with a parenthesized initializer list}}
(void) int({0}); // expected-error {{cannot initialize non-class type 'int' with a parenthesized initializer list}}
new int({0}); // expected-error {{cannot initialize non-class type 'int' with a parenthesized initializer list}}
int *b({0}); // expected-error {{cannot initialize non-class type 'int *' with a parenthesized initializer list}}
typedef int *intptr;
int *c = intptr({0}); // expected-error {{cannot initialize non-class type 'intptr' (aka 'int *') with a parenthesized initializer list}}
}
template<typename T> void dependent_edge_cases() {
T a({0});
(void) T({0});
new T({0});
T *b({0});
typedef T *tptr;
T *c = tptr({0});
}
void default_argument(int i = {}) {
}
struct DefaultArgument {
void default_argument(int i = {}) {
}
};
}
namespace PR12118 {
void test() {
one f(std::initializer_list<int>);
two f(int);
// to initializer_list is preferred
static_assert(sizeof(f({0})) == sizeof(one), "bad overload");
}
}
namespace excess_braces_sfinae {
using valid = int&;
using invalid = float&;
template<typename T> valid braces1(decltype(T{0})*);
template<typename T> invalid braces1(...);
template<typename T> valid braces2(decltype(T{{0}})*);
template<typename T> invalid braces2(...);
template<typename T> valid braces3(decltype(T{{{0}}})*);
template<typename T> invalid braces3(...);
valid a = braces1<int>(0);
invalid b = braces2<int>(0);
invalid c = braces3<int>(0);
struct X { int n; };
valid d = braces1<X>(0);
valid e = braces2<X>(0);
invalid f = braces3<X>(0);
}
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