69 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <array>10 11// template <size_t I, class T, size_t N> T& get(array<T, N>& a);12 13#include <array>14#include <cassert>15 16#include "test_macros.h"17 18template <typename... T>19TEST_CONSTEXPR std::array<int, sizeof...(T)> tempArray(T... args) {20 return {args...};21}22 23TEST_CONSTEXPR_CXX14 bool tests() {24 {25 std::array<double, 1> array = {3.3};26 assert(std::get<0>(array) == 3.3);27 std::get<0>(array) = 99.1;28 assert(std::get<0>(array) == 99.1);29 }30 {31 std::array<double, 2> array = {3.3, 4.4};32 assert(std::get<0>(array) == 3.3);33 assert(std::get<1>(array) == 4.4);34 std::get<0>(array) = 99.1;35 std::get<1>(array) = 99.2;36 assert(std::get<0>(array) == 99.1);37 assert(std::get<1>(array) == 99.2);38 }39 {40 std::array<double, 3> array = {3.3, 4.4, 5.5};41 assert(std::get<0>(array) == 3.3);42 assert(std::get<1>(array) == 4.4);43 assert(std::get<2>(array) == 5.5);44 std::get<1>(array) = 99.2;45 assert(std::get<0>(array) == 3.3);46 assert(std::get<1>(array) == 99.2);47 assert(std::get<2>(array) == 5.5);48 }49 {50 std::array<double, 1> array = {3.3};51 static_assert(std::is_same<double&, decltype(std::get<0>(array))>::value, "");52 }53 {54 assert(std::get<0>(tempArray(1, 2, 3)) == 1);55 assert(std::get<1>(tempArray(1, 2, 3)) == 2);56 assert(std::get<2>(tempArray(1, 2, 3)) == 3);57 }58 59 return true;60}61 62int main(int, char**) {63 tests();64#if TEST_STD_VER >= 1465 static_assert(tests(), "");66#endif67 return 0;68}69