65 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// <string>10 11// iterator erase(const_iterator p); // constexpr since C++2012 13#include <string>14#include <cassert>15 16#include "test_macros.h"17#include "min_allocator.h"18#include "asan_testing.h"19 20template <class S>21TEST_CONSTEXPR_CXX20 void test(S s, typename S::difference_type pos, S expected) {22 typename S::const_iterator p = s.begin() + pos;23 typename S::iterator i = s.erase(p);24 LIBCPP_ASSERT(s.__invariants());25 assert(s[s.size()] == typename S::value_type());26 assert(s == expected);27 assert(i - s.begin() == pos);28 LIBCPP_ASSERT(is_string_asan_correct(s));29}30 31template <class S>32TEST_CONSTEXPR_CXX20 void test_string() {33 test(S("abcde"), 0, S("bcde"));34 test(S("abcde"), 1, S("acde"));35 test(S("abcde"), 2, S("abde"));36 test(S("abcde"), 4, S("abcd"));37 test(S("abcdefghij"), 0, S("bcdefghij"));38 test(S("abcdefghij"), 1, S("acdefghij"));39 test(S("abcdefghij"), 5, S("abcdeghij"));40 test(S("abcdefghij"), 9, S("abcdefghi"));41 test(S("abcdefghijklmnopqrst"), 0, S("bcdefghijklmnopqrst"));42 test(S("abcdefghijklmnopqrst"), 1, S("acdefghijklmnopqrst"));43 test(S("abcdefghijklmnopqrst"), 10, S("abcdefghijlmnopqrst"));44 test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));45}46 47TEST_CONSTEXPR_CXX20 bool test() {48 test_string<std::string>();49#if TEST_STD_VER >= 1150 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();51 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();52#endif53 54 return true;55}56 57int main(int, char**) {58 test();59#if TEST_STD_VER > 1760 static_assert(test());61#endif62 63 return 0;64}65