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 //                flag_type f = regex_constants::ECMAScript);
17 
18 #include <regex>
19 #include <cassert>
20 
21 template <class String>
22 void
test(const String & p,std::regex_constants::syntax_option_type f,unsigned mc)23 test(const String& p, std::regex_constants::syntax_option_type f, unsigned mc)
24 {
25     std::basic_regex<typename String::value_type> r(p, f);
26     assert(r.flags() == f);
27     assert(r.mark_count() == mc);
28 }
29 
main()30 int main()
31 {
32     test(std::string("\\(a\\)"), std::regex_constants::basic, 1);
33     test(std::string("\\(a[bc]\\)"), std::regex_constants::basic, 1);
34     test(std::string("\\(a\\([bc]\\)\\)"), std::regex_constants::basic, 2);
35     test(std::string("(a([bc]))"), std::regex_constants::basic, 0);
36 
37     test(std::string("\\(a\\)"), std::regex_constants::extended, 0);
38     test(std::string("\\(a[bc]\\)"), std::regex_constants::extended, 0);
39     test(std::string("\\(a\\([bc]\\)\\)"), std::regex_constants::extended, 0);
40     test(std::string("(a([bc]))"), std::regex_constants::extended, 2);
41 
42     test(std::string("\\(a\\)"), std::regex_constants::ECMAScript, 0);
43     test(std::string("\\(a[bc]\\)"), std::regex_constants::ECMAScript, 0);
44     test(std::string("\\(a\\([bc]\\)\\)"), std::regex_constants::ECMAScript, 0);
45     test(std::string("(a([bc]))"), std::regex_constants::ECMAScript, 2);
46 
47     test(std::string("\\(a\\)"), std::regex_constants::awk, 0);
48     test(std::string("\\(a[bc]\\)"), std::regex_constants::awk, 0);
49     test(std::string("\\(a\\([bc]\\)\\)"), std::regex_constants::awk, 0);
50     test(std::string("(a([bc]))"), std::regex_constants::awk, 2);
51 
52     test(std::string("\\(a\\)"), std::regex_constants::grep, 1);
53     test(std::string("\\(a[bc]\\)"), std::regex_constants::grep, 1);
54     test(std::string("\\(a\\([bc]\\)\\)"), std::regex_constants::grep, 2);
55     test(std::string("(a([bc]))"), std::regex_constants::grep, 0);
56 
57     test(std::string("\\(a\\)"), std::regex_constants::egrep, 0);
58     test(std::string("\\(a[bc]\\)"), std::regex_constants::egrep, 0);
59     test(std::string("\\(a\\([bc]\\)\\)"), std::regex_constants::egrep, 0);
60     test(std::string("(a([bc]))"), std::regex_constants::egrep, 2);
61 }
62