1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <array> 11 12 // template <size_t I, class T, size_t N> T& get(array<T, N>& a); 13 14 #include <array> 15 #include <cassert> 16 17 #include "test_macros.h" 18 19 // std::array is explicitly allowed to be initialized with A a = { init-list };. 20 // Disable the missing braces warning for this reason. 21 #include "disable_missing_braces_warning.h" 22 23 24 #if TEST_STD_VER > 11 25 struct S { 26 std::array<int, 3> a; 27 int k; 28 constexpr S() : a{1,2,3}, k(std::get<2>(a)) {} 29 }; 30 31 constexpr std::array<int, 2> getArr () { return { 3, 4 }; } 32 #endif 33 34 int main() 35 { 36 { 37 typedef double T; 38 typedef std::array<T, 3> C; 39 C c = {1, 2, 3.5}; 40 std::get<1>(c) = 5.5; 41 assert(c[0] == 1); 42 assert(c[1] == 5.5); 43 assert(c[2] == 3.5); 44 } 45 #if TEST_STD_VER > 11 46 { 47 typedef double T; 48 typedef std::array<T, 3> C; 49 constexpr C c = {1, 2, 3.5}; 50 static_assert(std::get<0>(c) == 1, ""); 51 static_assert(std::get<1>(c) == 2, ""); 52 static_assert(std::get<2>(c) == 3.5, ""); 53 } 54 { 55 static_assert(S().k == 3, ""); 56 static_assert(std::get<1>(getArr()) == 4, ""); 57 } 58 #endif 59 } 60
