Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// { dg-do run { target c++11 } } namespace xstd { typedef decltype(sizeof(char)) size_t; template<class E> class initializer_list { private: size_t sz; const E* start; 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; constexpr initializer_list() : sz(), start(nullptr) {} template<size_t N> constexpr initializer_list(const E(&array)[N]) : sz(N), start(array) {} constexpr size_t size() const { return sz; } constexpr const E* begin() const { return start; } constexpr const E* end() const { return start + sz; } }; template<class E, size_t N> constexpr initializer_list<E> make_list(const E(&array)[N]) { return initializer_list<E>(array); } template<class E> E min(initializer_list<E> list) { // static_assert(list.size() > 0, "Invalid list"); auto it = list.begin(); E result = *it; for (++it; it != list.end(); ++it) { if (*it < result) { result = *it; } } return result; } } constexpr int global_i[] = {2, 4, -5, 6, 10}; constexpr xstd::initializer_list<int> list(global_i); #define SA(X) static_assert(X, #X) SA(list.size() == 5); SA(list.begin()[2] == -5); SA(list.end()[-1] == 10); int main() { if (xstd::min(xstd::make_list(global_i)) != -5) return 1; }