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// template<class InputIterator>
12// basic_string(InputIterator begin, InputIterator end,
13// const Allocator& a = Allocator()); // constexpr since C++20
14
15#include <string>
16#include <iterator>
17#include <cassert>
18#include <cstddef>
19
20#include "test_macros.h"
21#include "test_allocator.h"
22#include "test_iterators.h"
23#include "min_allocator.h"
24#include "asan_testing.h"
25
26template <class Alloc, class It>
27TEST_CONSTEXPR_CXX20 void test(It first, It last) {
28 typedef typename std::iterator_traits<It>::value_type charT;
29 typedef std::basic_string<charT, std::char_traits<charT>, Alloc> S;
30 S s2(first, last);
31 LIBCPP_ASSERT(s2.__invariants());
32 assert(s2.size() == static_cast<std::size_t>(std::distance(first, last)));
33 unsigned i = 0;
34 for (It it = first; it != last;) {
35 assert(s2[i] == *it);
36 ++it;
37 ++i;
38 }
39 assert(s2.get_allocator() == Alloc());
40 assert(s2.capacity() >= s2.size());
41 LIBCPP_ASSERT(is_string_asan_correct(s2));
42}
43
44template <class Alloc, class It>
45TEST_CONSTEXPR_CXX20 void test(It first, It last, const Alloc& a) {
46 typedef typename std::iterator_traits<It>::value_type charT;
47 typedef std::basic_string<charT, std::char_traits<charT>, Alloc> S;
48 S s2(first, last, a);
49 LIBCPP_ASSERT(s2.__invariants());
50 assert(s2.size() == static_cast<std::size_t>(std::distance(first, last)));
51 unsigned i = 0;
52 for (It it = first; it != last;) {
53 assert(s2[i] == *it);
54 ++it;
55 ++i;
56 }
57 assert(s2.get_allocator() == a);
58 assert(s2.capacity() >= s2.size());
59 LIBCPP_ASSERT(is_string_asan_correct(s2));
60}
61
62template <class Alloc>
63TEST_CONSTEXPR_CXX20 void test_string(const Alloc& a) {
64 const char* s = "12345678901234567890123456789012345678901234567890";
65
66 test<Alloc>(s, s);
67 test<Alloc>(s, s, Alloc(a));
68
69 test<Alloc>(s, s + 1);
70 test<Alloc>(s, s + 1, Alloc(a));
71
72 test<Alloc>(s, s + 10);
73 test<Alloc>(s, s + 10, Alloc(a));
74
75 test<Alloc>(s, s + 50);
76 test<Alloc>(s, s + 50, Alloc(a));
77
78 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s));
79 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), Alloc(a));
80
81 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 1));
82 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 1), Alloc(a));
83
84 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 10));
85 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 10), Alloc(a));
86
87 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 50));
88 test<Alloc>(cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s + 50), Alloc(a));
89}
90
91TEST_CONSTEXPR_CXX20 bool test() {
92 test_string(test_allocator<char>());
93 test_string(test_allocator<char>(2));
94#if TEST_STD_VER >= 11
95 test_string(min_allocator<char>());
96#endif
97 {
98 static_assert((!std::is_constructible<std::string, std::string, std::string>::value), "");
99 static_assert((!std::is_constructible<std::string, std::string, std::string, std::allocator<char> >::value), "");
100 }
101
102 return true;
103}
104
105int main(int, char**) {
106 test();
107#if TEST_STD_VER > 17
108 static_assert(test());
109#endif
110
111 return 0;
112}
113

source code of libcxx/test/std/strings/basic.string/string.cons/iter_alloc.pass.cpp