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// UNSUPPORTED: libcpp-no-exceptions
11// <regex>
12
13// template <class charT, class traits = regex_traits<charT>> class basic_regex;
14
15// template <class ST, class SA>
16//    basic_regex(const basic_string<charT, ST, SA>& s);
17
18#include <regex>
19#include <cassert>
20#include "test_macros.h"
21
22static bool error_escape_thrown(const char *pat)
23{
24    bool result = false;
25    try {
26        std::regex re(pat);
27    } catch (const std::regex_error &ex) {
28        result = (ex.code() == std::regex_constants::error_escape);
29    }
30    return result;
31}
32
33int main()
34{
35    assert(error_escape_thrown("[\\a]"));
36    assert(error_escape_thrown("\\a"));
37    assert(error_escape_thrown("\\"));
38
39    assert(error_escape_thrown("[\\e]"));
40    assert(error_escape_thrown("\\e"));
41
42    assert(error_escape_thrown("[\\c:]"));
43    assert(error_escape_thrown("\\c:"));
44    assert(error_escape_thrown("\\c"));
45    assert(!error_escape_thrown("[\\cA]"));
46    assert(!error_escape_thrown("\\cA"));
47
48}
49