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// void swap(array& a); 13// namespace std { void swap(array<T, N> &x, array<T, N> &y); 14 15#include <cassert> 16#include <array> 17 18#include "test_macros.h" 19 20// std::array is explicitly allowed to be initialized with A a = { init-list };. 21// Disable the missing braces warning for this reason. 22#include "disable_missing_braces_warning.h" 23 24struct NonSwappable { 25 NonSwappable() {} 26private: 27 NonSwappable(NonSwappable const&); 28 NonSwappable& operator=(NonSwappable const&); 29}; 30 31int main() 32{ 33 { 34 typedef double T; 35 typedef std::array<T, 3> C; 36 C c1 = {1, 2, 3.5}; 37 C c2 = {4, 5, 6.5}; 38 c1.swap(c2); 39 assert(c1.size() == 3); 40 assert(c1[0] == 4); 41 assert(c1[1] == 5); 42 assert(c1[2] == 6.5); 43 assert(c2.size() == 3); 44 assert(c2[0] == 1); 45 assert(c2[1] == 2); 46 assert(c2[2] == 3.5); 47 } 48 { 49 typedef double T; 50 typedef std::array<T, 3> C; 51 C c1 = {1, 2, 3.5}; 52 C c2 = {4, 5, 6.5}; 53 std::swap(c1, c2); 54 assert(c1.size() == 3); 55 assert(c1[0] == 4); 56 assert(c1[1] == 5); 57 assert(c1[2] == 6.5); 58 assert(c2.size() == 3); 59 assert(c2[0] == 1); 60 assert(c2[1] == 2); 61 assert(c2[2] == 3.5); 62 } 63 64 { 65 typedef double T; 66 typedef std::array<T, 0> C; 67 C c1 = {}; 68 C c2 = {}; 69 c1.swap(c2); 70 assert(c1.size() == 0); 71 assert(c2.size() == 0); 72 } 73 { 74 typedef double T; 75 typedef std::array<T, 0> C; 76 C c1 = {}; 77 C c2 = {}; 78 std::swap(c1, c2); 79 assert(c1.size() == 0); 80 assert(c2.size() == 0); 81 } 82 { 83 typedef NonSwappable T; 84 typedef std::array<T, 0> C0; 85 C0 l = {}; 86 C0 r = {}; 87 l.swap(r); 88#if TEST_STD_VER >= 11 89 static_assert(noexcept(l.swap(r)), ""); 90#endif 91 } 92 93} 94