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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14, c++17 10 11 // constexpr iterator begin() const; 12 13 #include <cassert> 14 #include <ranges> 15 #include <utility> 16 17 #include "test_macros.h" 18 #include "types.h" 19 20 template<class T> testType()21constexpr void testType() { 22 { 23 std::ranges::iota_view<T> io(T(0)); 24 assert(*io.begin() == T(0)); 25 } 26 { 27 std::ranges::iota_view<T> io(T(10)); 28 assert(*io.begin() == T(10)); 29 assert(*std::move(io).begin() == T(10)); 30 } 31 { 32 const std::ranges::iota_view<T> io(T(0)); 33 assert(*io.begin() == T(0)); 34 } 35 { 36 const std::ranges::iota_view<T> io(T(10)); 37 assert(*io.begin() == T(10)); 38 } 39 } 40 test()41constexpr bool test() { 42 testType<SomeInt>(); 43 testType<long long>(); 44 testType<unsigned long long>(); 45 testType<signed long>(); 46 testType<unsigned long>(); 47 testType<int>(); 48 testType<unsigned>(); 49 testType<short>(); 50 testType<unsigned short>(); 51 52 return true; 53 } 54 main(int,char **)55int main(int, char**) { 56 test(); 57 static_assert(test()); 58 59 return 0; 60 } 61