| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11 |
| |
| // <string> |
| |
| // iterator begin(); // constexpr since C++20 |
| // iterator end(); // constexpr since C++20 |
| // const_iterator begin() const; // constexpr since C++20 |
| // const_iterator end() const; // constexpr since C++20 |
| // const_iterator cbegin() const; // constexpr since C++20 |
| // const_iterator cend() const; // constexpr since C++20 |
| |
| #include <string> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template<class C> |
| TEST_CONSTEXPR_CXX20 void test() |
| { |
| { // N3644 testing |
| typename C::iterator ii1{}, ii2{}; |
| typename C::iterator ii4 = ii1; |
| typename C::const_iterator cii{}; |
| |
| assert ( ii1 == ii2 ); |
| assert ( ii1 == ii4 ); |
| |
| assert (!(ii1 != ii2 )); |
| |
| assert ( (ii1 == cii )); |
| assert ( (cii == ii1 )); |
| assert (!(ii1 != cii )); |
| assert (!(cii != ii1 )); |
| assert (!(ii1 < cii )); |
| assert (!(cii < ii1 )); |
| assert ( (ii1 <= cii )); |
| assert ( (cii <= ii1 )); |
| assert (!(ii1 > cii )); |
| assert (!(cii > ii1 )); |
| assert ( (ii1 >= cii )); |
| assert ( (cii >= ii1 )); |
| assert (cii - ii1 == 0); |
| assert (ii1 - cii == 0); |
| } |
| { |
| C a; |
| typename C::iterator i1 = a.begin(); |
| typename C::iterator i2; |
| i2 = i1; |
| assert ( i1 == i2 ); |
| } |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| test<std::string>(); |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test<std::wstring>(); |
| #endif |
| |
| #ifndef TEST_HAS_NO_CHAR8_T |
| test<std::u8string>(); |
| #endif |
| |
| test<std::u16string>(); |
| test<std::u32string>(); |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| return 0; |
| } |