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 // UNSUPPORTED: libcpp-has-no-incomplete-ranges 11 12 // constexpr iterator& operator++(); 13 // constexpr void operator++(int); 14 // constexpr iterator operator++(int) requires incrementable<W>; 15 16 #include <ranges> 17 #include <cassert> 18 19 #include "test_macros.h" 20 #include "../types.h" 21 test()22constexpr bool test() { 23 { 24 std::ranges::iota_view<int> io(0); 25 auto iter1 = io.begin(); 26 auto iter2 = io.begin(); 27 assert(iter1 == iter2); 28 assert(++iter1 != iter2++); 29 assert(iter1 == iter2); 30 31 static_assert(!std::is_reference_v<decltype(iter2++)>); 32 static_assert( std::is_reference_v<decltype(++iter2)>); 33 static_assert(std::same_as<std::remove_reference_t<decltype(++iter2)>, decltype(iter2++)>); 34 } 35 { 36 std::ranges::iota_view io(SomeInt(0)); 37 auto iter1 = io.begin(); 38 auto iter2 = io.begin(); 39 assert(iter1 == iter2); 40 assert(++iter1 != iter2++); 41 assert(iter1 == iter2); 42 43 static_assert(!std::is_reference_v<decltype(iter2++)>); 44 static_assert( std::is_reference_v<decltype(++iter2)>); 45 static_assert(std::same_as<std::remove_reference_t<decltype(++iter2)>, decltype(iter2++)>); 46 } 47 48 { 49 std::ranges::iota_view<NotIncrementable> io(NotIncrementable(0)); 50 auto iter1 = io.begin(); 51 auto iter2 = io.begin(); 52 assert(iter1 == iter2); 53 assert(++iter1 != iter2); 54 iter2++; 55 assert(iter1 == iter2); 56 57 static_assert(std::same_as<decltype(iter2++), void>); 58 static_assert(std::is_reference_v<decltype(++iter2)>); 59 } 60 61 return true; 62 } 63 main(int,char **)64int main(int, char**) { 65 test(); 66 static_assert(test()); 67 68 return 0; 69 } 70