1 // { dg-do run { target c++11 } } 2 3 namespace xstd { 4 5 typedef decltype(sizeof(char)) size_t; 6 7 template<class E> 8 class initializer_list { 9 private: 10 size_t sz; 11 const E* start; 12 13 public: 14 typedef E value_type; 15 typedef const E& reference; 16 typedef const E& const_reference; 17 typedef size_t size_type; 18 typedef const E* iterator; 19 typedef const E* const_iterator; 20 initializer_list()21 constexpr initializer_list() : sz(), start(nullptr) {} 22 23 template<size_t N> initializer_list(const E (& array)[N])24 constexpr initializer_list(const E(&array)[N]) : sz(N), start(array) {} 25 size()26 constexpr size_t size() const { return sz; } 27 begin()28 constexpr const E* begin() const { return start; } 29 end()30 constexpr const E* end() const { return start + sz; } 31 }; 32 33 template<class E, size_t N> make_list(const E (& array)[N])34constexpr initializer_list<E> make_list(const E(&array)[N]) { 35 return initializer_list<E>(array); 36 } 37 38 template<class E> min(initializer_list<E> list)39E min(initializer_list<E> list) 40 { 41 // static_assert(list.size() > 0, "Invalid list"); 42 auto it = list.begin(); 43 E result = *it; 44 for (++it; it != list.end(); ++it) { 45 if (*it < result) { 46 result = *it; 47 } 48 } 49 return result; 50 } 51 52 } 53 54 constexpr int global_i[] = {2, 4, -5, 6, 10}; 55 constexpr xstd::initializer_list<int> list(global_i); 56 #define SA(X) static_assert(X, #X) 57 SA(list.size() == 5); 58 SA(list.begin()[2] == -5); 59 SA(list.end()[-1] == 10); 60 main()61int main() { 62 if (xstd::min(xstd::make_list(global_i)) != -5) 63 return 1; 64 } 65