libcxx/test/std/re/re.regex/re.regex.construct/il_flg.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: c++03
  10
  11 // <regex>
  12
  13 // template <class charT, class traits = regex_traits<charT>> class basic_regex;
  14
  15 // basic_regex(initializer_list<charT> il,
  16 //             flag_type f = regex_constants::ECMAScript);
  17
  18 #include <regex>
  19 #include <cassert>
  20 #include "test_macros.h"
  21
  22
  23 void
  24 test(std::initializer_list<char> il, std::regex_constants::syntax_option_type f, unsigned mc)
  25 {
  26     std::basic_regex<char> r(il, f);
  27     assert(r.flags() == f);
  28     assert(r.mark_count() == mc);
  29 }
  30
  31
  32 int main(int, char**)
  33 {
  34     std::string s1("\\(a\\)");
  35     std::string s2("\\(a[bc]\\)");
  36     std::string s3("\\(a\\([bc]\\)\\)");
  37     std::string s4("(a([bc]))");
  38
  39     test({'\\', '(', 'a', '\\', ')'}, std::regex_constants::basic, 1);
  40     test({'\\', '(', 'a', '[', 'b', 'c', ']', '\\', ')'}, std::regex_constants::basic, 1);
  41     test({'\\', '(', 'a', '\\', '(', '[', 'b', 'c', ']', '\\', ')', '\\', ')'}, std::regex_constants::basic, 2);
  42     test({'(', 'a', '(', '[', 'b', 'c', ']', ')', ')'}, std::regex_constants::basic, 0);
  43
  44     test({'\\', '(', 'a', '\\', ')'}, std::regex_constants::extended, 0);
  45     test({'\\', '(', 'a', '[', 'b', 'c', ']', '\\', ')'}, std::regex_constants::extended, 0);
  46     test({'\\', '(', 'a', '\\', '(', '[', 'b', 'c', ']', '\\', ')', '\\', ')'}, std::regex_constants::extended, 0);
  47     test({'(', 'a', '(', '[', 'b', 'c', ']', ')', ')'}, std::regex_constants::extended, 2);
  48
  49     test({'\\', '(', 'a', '\\', ')'}, std::regex_constants::ECMAScript, 0);
  50     test({'\\', '(', 'a', '[', 'b', 'c', ']', '\\', ')'}, std::regex_constants::ECMAScript, 0);
  51     test({'\\', '(', 'a', '\\', '(', '[', 'b', 'c', ']', '\\', ')', '\\', ')'}, std::regex_constants::ECMAScript, 0);
  52     test({'(', 'a', '(', '[', 'b', 'c', ']', ')', ')'}, std::regex_constants::ECMAScript, 2);
  53
  54     test({'\\', '(', 'a', '\\', ')'}, std::regex_constants::awk, 0);
  55     test({'\\', '(', 'a', '[', 'b', 'c', ']', '\\', ')'}, std::regex_constants::awk, 0);
  56     test({'\\', '(', 'a', '\\', '(', '[', 'b', 'c', ']', '\\', ')', '\\', ')'}, std::regex_constants::awk, 0);
  57     test({'(', 'a', '(', '[', 'b', 'c', ']', ')', ')'}, std::regex_constants::awk, 2);
  58
  59     test({'\\', '(', 'a', '\\', ')'}, std::regex_constants::grep, 1);
  60     test({'\\', '(', 'a', '[', 'b', 'c', ']', '\\', ')'}, std::regex_constants::grep, 1);
  61     test({'\\', '(', 'a', '\\', '(', '[', 'b', 'c', ']', '\\', ')', '\\', ')'}, std::regex_constants::grep, 2);
  62     test({'(', 'a', '(', '[', 'b', 'c', ']', ')', ')'}, std::regex_constants::grep, 0);
  63
  64     test({'\\', '(', 'a', '\\', ')'}, std::regex_constants::egrep, 0);
  65     test({'\\', '(', 'a', '[', 'b', 'c', ']', '\\', ')'}, std::regex_constants::egrep, 0);
  66     test({'\\', '(', 'a', '\\', '(', '[', 'b', 'c', ']', '\\', ')', '\\', ')'}, std::regex_constants::egrep, 0);
  67     test({'(', 'a', '(', '[', 'b', 'c', ']', ')', ')'}, std::regex_constants::egrep, 2);
  68
  69   return 0;
  70 }