46 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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010 11// constexpr const W & operator[](difference_type n) const noexcept;12 13#include <ranges>14#include <cassert>15#include <concepts>16#include <algorithm>17 18constexpr bool test() {19 // unbound20 {21 std::ranges::repeat_view<int> v(31);22 auto iter = v.begin();23 assert(std::ranges::all_of(std::views::iota(0, 100), [&v](int i) { return v[i] == 31; }));24 25 static_assert(noexcept(iter[0]));26 static_assert(std::same_as<decltype(iter[0]), const int&>);27 }28 29 // bound30 {31 std::ranges::repeat_view<int, int> v(32);32 auto iter = v.begin();33 assert(std::ranges::all_of(v, [](int i) { return i == 32; }));34 static_assert(noexcept(iter[0]));35 static_assert(std::same_as<decltype(iter[0]), const int&>);36 }37 return true;38}39 40int main(int, char**) {41 test();42 static_assert(test());43 44 return 0;45}46