1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <regex>
11
12// template <class BidirectionalIterator, class Allocator, class charT, class traits>
13//     bool
14//     regex_search(BidirectionalIterator first, BidirectionalIterator last,
15//                  match_results<BidirectionalIterator, Allocator>& m,
16//                  const basic_regex<charT, traits>& e,
17//                  regex_constants::match_flag_type flags = regex_constants::match_default);
18
19#include <regex>
20#include <cassert>
21
22int main()
23{
24    // Iterating over /^a/ should yield one instance at the beginning
25    // of the text.
26
27    const char *text = "aaa\naa";
28    std::regex re{"^a"};
29    std::cregex_iterator it{text, text+6, re};
30    std::cregex_iterator end{};
31
32    assert(it->str() == "a");
33    assert(it->position(0) == 0);
34    assert(it->length(0) == 1);
35
36    ++it;
37    assert(it == end);
38}
39