| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // When the debug mode is enabled, we don't unwrap iterators in std::copy |
| // so we don't get this optimization. |
| // UNSUPPORTED: libcpp-has-debug-mode |
| |
| // check that std::__unwrap_iter() returns the correct type |
| |
| #include <algorithm> |
| #include <cassert> |
| #include <string> |
| #include <type_traits> |
| |
| #include "test_iterators.h" |
| #include "test_macros.h" |
| |
| template <class Iter> |
| using UnwrapT = decltype(std::__unwrap_iter(std::declval<Iter>())); |
| |
| template <class Iter> |
| using rev_iter = std::reverse_iterator<Iter>; |
| |
| template <class Iter> |
| using rev_rev_iter = rev_iter<rev_iter<Iter> >; |
| |
| static_assert(std::is_same<UnwrapT<int*>, int*>::value, ""); |
| static_assert(std::is_same<UnwrapT<std::__wrap_iter<int*> >, int*>::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_iter<int*> >, std::reverse_iterator<int*> >::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_rev_iter<int*> >, int*>::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_rev_iter<std::__wrap_iter<int*> > >, int*>::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_rev_iter<rev_iter<std::__wrap_iter<int*> > > >, rev_iter<std::__wrap_iter<int*> > >::value, ""); |
| |
| static_assert(std::is_same<UnwrapT<random_access_iterator<int*> >, random_access_iterator<int*> >::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_iter<random_access_iterator<int*> > >, rev_iter<random_access_iterator<int*> > >::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_rev_iter<random_access_iterator<int*> > >, random_access_iterator<int*> >::value, ""); |
| static_assert(std::is_same<UnwrapT<rev_rev_iter<rev_iter<random_access_iterator<int*> > > >, rev_iter<random_access_iterator<int*> > >::value, ""); |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| std::string str = "Banane"; |
| using Iter = std::string::iterator; |
| |
| assert(std::__unwrap_iter(str.begin()) == str.data()); |
| assert(std::__unwrap_iter(str.end()) == str.data() + str.size()); |
| assert(std::__unwrap_iter(rev_rev_iter<Iter>(rev_iter<Iter>(str.begin()))) == str.data()); |
| assert(std::__unwrap_iter(rev_rev_iter<Iter>(rev_iter<Iter>(str.end()))) == str.data() + str.size()); |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| |
| return 0; |
| } |