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 charT, class traits = regex_traits<charT>> class basic_regex;
13
14// template <class ST, class SA>
15//    basic_regex(const basic_string<charT, ST, SA>& s);
16
17#include <regex>
18#include <cassert>
19
20int main()
21{
22    using std::regex_constants::awk;
23
24    assert(std::regex_match("\4", std::regex{"\\4", awk}));
25    assert(std::regex_match("\41", std::regex{"\\41", awk}));
26    assert(std::regex_match("\141", std::regex{"\\141", awk}));
27    assert(std::regex_match("\1411", std::regex{"\\1411", awk}));
28}
29