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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <regex>
// template <class charT, class traits = regex_traits<charT>> class basic_regex;
// template <class ST, class SA>
// basic_regex(const basic_string<charT, ST, SA>& s);
#include <regex>
#include <cassert>
int main()
{
using std::regex_constants::awk;
assert(std::regex_match("\4", std::regex{"\\4", awk}));
assert(std::regex_match("\41", std::regex{"\\41", awk}));
assert(std::regex_match("\141", std::regex{"\\141", awk}));
assert(std::regex_match("\1411", std::regex{"\\1411", awk}));
}
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