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 
error_escape_thrown(const char * pat)22 static 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 
main()33 int 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