117 lines
3 KiB
C++
117 lines
3 KiB
C++
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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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struct one { char c[1]; };
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struct two { char c[2]; };
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namespace std {
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typedef decltype(sizeof(int)) size_t;
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// libc++'s implementation
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template <class _E>
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class initializer_list
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{
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const _E* __begin_;
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size_t __size_;
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initializer_list(const _E* __b, size_t __s)
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: __begin_(__b),
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__size_(__s)
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{}
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public:
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typedef _E value_type;
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typedef const _E& reference;
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typedef const _E& const_reference;
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typedef size_t size_type;
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typedef const _E* iterator;
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typedef const _E* const_iterator;
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initializer_list() : __begin_(nullptr), __size_(0) {}
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size_t size() const {return __size_;}
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const _E* begin() const {return __begin_;}
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const _E* end() const {return __begin_ + __size_;}
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};
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}
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namespace integral {
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void initialization() {
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{ const int a{}; static_assert(a == 0, ""); }
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{ const int a = {}; static_assert(a == 0, ""); }
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{ const int a{1}; static_assert(a == 1, ""); }
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{ const int a = {1}; static_assert(a == 1, ""); }
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{ const int a{1, 2}; } // expected-error {{excess elements}}
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{ const int a = {1, 2}; } // expected-error {{excess elements}}
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// FIXME: Redundant warnings.
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{ const short a{100000}; } // expected-error {{cannot be narrowed}} expected-note {{inserting an explicit cast}} expected-warning {{changes value}}
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{ const short a = {100000}; } // expected-error {{cannot be narrowed}} expected-note {{inserting an explicit cast}} expected-warning {{changes value}}
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{ if (const int a{1}) static_assert(a == 1, ""); }
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{ if (const int a = {1}) static_assert(a == 1, ""); }
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}
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int direct_usage() {
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int ar[10];
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(void) ar[{1}]; // expected-error {{array subscript is not an integer}}
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return {1};
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}
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void inline_init() {
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auto v = int{1};
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(void) new int{1};
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}
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struct A {
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int i;
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A() : i{1} {}
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};
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void function_call() {
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void takes_int(int);
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takes_int({1});
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}
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void overloaded_call() {
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one overloaded(int);
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two overloaded(double);
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static_assert(sizeof(overloaded({0})) == sizeof(one), "bad overload");
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static_assert(sizeof(overloaded({0.0})) == sizeof(two), "bad overload");
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void ambiguous(int, double); // expected-note {{candidate}}
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void ambiguous(double, int); // expected-note {{candidate}}
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ambiguous({0}, {0}); // expected-error {{ambiguous}}
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void emptylist(int);
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void emptylist(int, int, int);
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emptylist({});
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emptylist({}, {}, {});
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}
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void edge_cases() {
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// FIXME: very poor error message
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int a({0}); // expected-error {{cannot initialize}}
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(void) int({0}); // expected-error {{functional-style cast}}
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new int({0}); // expected-error {{cannot initialize}}
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}
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void default_argument(int i = {}) {
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}
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struct DefaultArgument {
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void default_argument(int i = {}) {
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}
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};
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}
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namespace PR12118 {
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void test() {
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one f(std::initializer_list<int>);
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two f(int);
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// to initializer_list is preferred
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static_assert(sizeof(f({0})) == sizeof(one), "bad overload");
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}
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}
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