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// <string>
10
11// iterator insert(const_iterator p, charT c); // constexpr since C++20
12
13#include <string>
14#include <stdexcept>
15#include <cassert>
16
17#include "test_macros.h"
18#include "min_allocator.h"
19#include "asan_testing.h"
20
21template <class S>
22TEST_CONSTEXPR_CXX20 void test(S& s, typename S::const_iterator p, typename S::value_type c, S expected) {
23 LIBCPP_ASSERT(is_string_asan_correct(s));
24 bool sufficient_cap = s.size() < s.capacity();
25 typename S::difference_type pos = p - s.begin();
26 typename S::iterator i = s.insert(p, c);
27 LIBCPP_ASSERT(s.__invariants());
28 assert(s == expected);
29 assert(i - s.begin() == pos);
30 assert(*i == c);
31 if (sufficient_cap)
32 assert(i == p);
33 LIBCPP_ASSERT(is_string_asan_correct(s));
34}
35
36template <class S>
37TEST_CONSTEXPR_CXX20 void test_string() {
38 S s;
39 test(s, s.begin(), '1', S("1"));
40 test(s, s.begin(), 'a', S("a1"));
41 test(s, s.end(), 'b', S("a1b"));
42 test(s, s.end() - 1, 'c', S("a1cb"));
43 test(s, s.end() - 2, 'd', S("a1dcb"));
44 test(s, s.end() - 3, '2', S("a12dcb"));
45 test(s, s.end() - 4, '3', S("a132dcb"));
46 test(s, s.end() - 5, '4', S("a1432dcb"));
47 test(s, s.begin() + 1, '5', S("a51432dcb"));
48 test(s, s.begin() + 2, '6', S("a561432dcb"));
49 test(s, s.begin() + 3, '7', S("a5671432dcb"));
50 test(s, s.begin() + 4, 'A', S("a567A1432dcb"));
51 test(s, s.begin() + 5, 'B', S("a567AB1432dcb"));
52 test(s, s.begin() + 6, 'C', S("a567ABC1432dcb"));
53 test(s, s.begin(), 'x', S("xa567ABC1432dcb"));
54 test(s, s.begin(), 'x', S("xxa567ABC1432dcb"));
55 test(s, s.begin(), 'x', S("xxxa567ABC1432dcb"));
56 test(s, s.begin(), 'x', S("xxxxa567ABC1432dcb"));
57 test(s, s.begin(), 'x', S("xxxxxa567ABC1432dcb"));
58 test(s, s.begin(), 'x', S("xxxxxxa567ABC1432dcb"));
59 test(s, s.begin(), 'x', S("xxxxxxxa567ABC1432dcb"));
60 test(s, s.begin(), 'x', S("xxxxxxxxa567ABC1432dcb"));
61 test(s, s.begin(), 'x', S("xxxxxxxxxa567ABC1432dcb"));
62 test(s, s.begin(), 'x', S("xxxxxxxxxxa567ABC1432dcb"));
63 test(s, s.begin(), 'x', S("xxxxxxxxxxxa567ABC1432dcb"));
64 test(s, s.begin(), 'x', S("xxxxxxxxxxxxa567ABC1432dcb"));
65 test(s, s.begin(), 'x', S("xxxxxxxxxxxxxa567ABC1432dcb"));
66 test(s, s.begin(), 'x', S("xxxxxxxxxxxxxxa567ABC1432dcb"));
67 test(s, s.begin(), 'x', S("xxxxxxxxxxxxxxxa567ABC1432dcb"));
68 test(s, s.begin(), 'x', S("xxxxxxxxxxxxxxxxa567ABC1432dcb"));
69 test(s, s.begin() + 1, 'x', S("xxxxxxxxxxxxxxxxxa567ABC1432dcb"));
70}
71
72TEST_CONSTEXPR_CXX20 bool test() {
73 test_string<std::string>();
74#if TEST_STD_VER >= 11
75 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
76 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
77#endif
78
79 return true;
80}
81
82int main(int, char**) {
83 test();
84#if TEST_STD_VER > 17
85 static_assert(test());
86#endif
87
88 return 0;
89}
90

source code of libcxx/test/std/strings/basic.string/string.modifiers/string_insert/iter_char.pass.cpp