| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <string> |
| |
| // void pop_back(); // constexpr since C++20 |
| |
| #include <string> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "min_allocator.h" |
| |
| template <class S> |
| TEST_CONSTEXPR_CXX20 void |
| test(S s, S expected) |
| { |
| s.pop_back(); |
| LIBCPP_ASSERT(s.__invariants()); |
| assert(s[s.size()] == typename S::value_type()); |
| assert(s == expected); |
| } |
| |
| template <class S> |
| TEST_CONSTEXPR_CXX20 void test_string() { |
| test(S("abcde"), S("abcd")); |
| test(S("abcdefghij"), S("abcdefghi")); |
| test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrs")); |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| test_string<std::string>(); |
| #if TEST_STD_VER >= 11 |
| test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>(); |
| #endif |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| |
| return 0; |
| } |