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// <regex>
10
11// class match_results<BidirectionalIterator, Allocator>
12
13// explicit match_results(const Allocator& a = Allocator()); // before C++20
14// match_results() : match_results(Allocator()) {} // C++20
15// explicit match_results(const Allocator& a); // C++20
16
17#include <regex>
18#include <cassert>
19#include "test_macros.h"
20#if TEST_STD_VER >= 11
21#include "test_convertible.h"
22
23template <typename T>
24void test_implicit() {
25 static_assert(test_convertible<T>(), "");
26 static_assert(!test_convertible<T, typename T::allocator_type>(), "");
27}
28#endif
29
30template <class CharT>
31void
32test()
33{
34 typedef std::match_results<const CharT*> M;
35 typedef std::allocator<std::sub_match<const CharT*> > Alloc;
36 M m;
37 assert(m.size() == 0);
38 assert(!m.ready());
39 assert(m.get_allocator() == Alloc());
40
41#if TEST_STD_VER >= 11
42 test_implicit<M>();
43#endif
44}
45
46int main(int, char**)
47{
48 test<char>();
49#ifndef TEST_HAS_NO_WIDE_CHARACTERS
50 test<wchar_t>();
51#endif
52
53 return 0;
54}
55

source code of libcxx/test/std/re/re.results/re.results.const/default.pass.cpp