libcxx/test/std/re/re.regex/re.regex.construct/string_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 // <regex>
  10
  11 // template <class charT, class traits = regex_traits<charT>> class basic_regex;
  12
  13 // template <class ST, class SA>
  14 //    basic_regex(const basic_string<charT, ST, SA>& s,
  15 //                flag_type f = regex_constants::ECMAScript);
  16
  17 #include <regex>
  18 #include <cassert>
  19 #include "test_macros.h"
  20
  21 template <class String>
  22 void
  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
  30 int main(int, char**)
  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   return 0;
  63 }