| 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 outer-iterator& outer-iterator::operator++(); |
| 12 | // constexpr decltype(auto) outer-iterator::operator++(int); |
| 13 | |
| 14 | // Note that corner cases are tested in `range.lazy.split/general.pass.cpp`. |
| 15 | |
| 16 | #include <ranges> |
| 17 | |
| 18 | #include <algorithm> |
| 19 | #include <cassert> |
| 20 | #include <string> |
| 21 | #include "../types.h" |
| 22 | |
| 23 | constexpr bool test() { |
| 24 | using namespace std::string_literals; |
| 25 | // Can call `outer-iterator::operator++`; `View` is a forward range. |
| 26 | { |
| 27 | SplitViewForward v("abc def ghi" , " " ); |
| 28 | |
| 29 | // ++i |
| 30 | { |
| 31 | auto i = v.begin(); |
| 32 | assert(std::ranges::equal(*i, "abc"s )); |
| 33 | |
| 34 | decltype(auto) i2 = ++i; |
| 35 | static_assert(std::is_lvalue_reference_v<decltype(i2)>); |
| 36 | assert(&i2 == &i); |
| 37 | assert(std::ranges::equal(*i2, "def"s )); |
| 38 | } |
| 39 | |
| 40 | // i++ |
| 41 | { |
| 42 | auto i = v.begin(); |
| 43 | assert(std::ranges::equal(*i, "abc"s )); |
| 44 | |
| 45 | decltype(auto) i2 = i++; |
| 46 | static_assert(!std::is_reference_v<decltype(i2)>); |
| 47 | assert(std::ranges::equal(*i2, "abc"s )); |
| 48 | assert(std::ranges::equal(*i, "def"s )); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | // Can call `outer-iterator::operator++`; `View` is an input range. |
| 53 | { |
| 54 | SplitViewInput v("abc def ghi" , ' '); |
| 55 | |
| 56 | // ++i |
| 57 | { |
| 58 | auto i = v.begin(); |
| 59 | assert(std::ranges::equal(*i, "abc"s )); |
| 60 | |
| 61 | decltype(auto) i2 = ++i; |
| 62 | static_assert(std::is_lvalue_reference_v<decltype(i2)>); |
| 63 | assert(&i2 == &i); |
| 64 | assert(std::ranges::equal(*i2, "def"s )); |
| 65 | } |
| 66 | |
| 67 | // i++ |
| 68 | { |
| 69 | auto i = v.begin(); |
| 70 | assert(std::ranges::equal(*i, "abc"s )); |
| 71 | |
| 72 | static_assert(std::is_void_v<decltype(i++)>); |
| 73 | i++; |
| 74 | assert(std::ranges::equal(*i, "def"s )); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | int main(int, char**) { |
| 82 | test(); |
| 83 | static_assert(test()); |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |