libcxx/test/std/re/re.regex/re.regex.construct/iter_iter_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 ForwardIterator>
  14 //    basic_regex(ForwardIterator first, ForwardIterator last,
  15 //                flag_type f = regex_constants::ECMAScript);
  16
  17 #include <regex>
  18 #include <cassert>
  19
  20 #include "test_iterators.h"
  21 #include "test_macros.h"
  22
  23 template <class Iter>
  24 void
  25 test(Iter first, Iter last, std::regex_constants::syntax_option_type f, unsigned mc)
  26 {
  27     std::basic_regex<typename std::iterator_traits<Iter>::value_type> r(first, last, f);
  28     assert(r.flags() == f);
  29     assert(r.mark_count() == mc);
  30 }
  31
  32 int main(int, char**)
  33 {
  34     typedef forward_iterator<std::string::const_iterator> F;
  35     std::string s1("\\(a\\)");
  36     std::string s2("\\(a[bc]\\)");
  37     std::string s3("\\(a\\([bc]\\)\\)");
  38     std::string s4("(a([bc]))");
  39
  40     test(F(s1.begin()), F(s1.end()), std::regex_constants::basic, 1);
  41     test(F(s2.begin()), F(s2.end()), std::regex_constants::basic, 1);
  42     test(F(s3.begin()), F(s3.end()), std::regex_constants::basic, 2);
  43     test(F(s4.begin()), F(s4.end()), std::regex_constants::basic, 0);
  44
  45     test(F(s1.begin()), F(s1.end()), std::regex_constants::extended, 0);
  46     test(F(s2.begin()), F(s2.end()), std::regex_constants::extended, 0);
  47     test(F(s3.begin()), F(s3.end()), std::regex_constants::extended, 0);
  48     test(F(s4.begin()), F(s4.end()), std::regex_constants::extended, 2);
  49
  50     test(F(s1.begin()), F(s1.end()), std::regex_constants::ECMAScript, 0);
  51     test(F(s2.begin()), F(s2.end()), std::regex_constants::ECMAScript, 0);
  52     test(F(s3.begin()), F(s3.end()), std::regex_constants::ECMAScript, 0);
  53     test(F(s4.begin()), F(s4.end()), std::regex_constants::ECMAScript, 2);
  54
  55     test(F(s1.begin()), F(s1.end()), std::regex_constants::awk, 0);
  56     test(F(s2.begin()), F(s2.end()), std::regex_constants::awk, 0);
  57     test(F(s3.begin()), F(s3.end()), std::regex_constants::awk, 0);
  58     test(F(s4.begin()), F(s4.end()), std::regex_constants::awk, 2);
  59
  60     test(F(s1.begin()), F(s1.end()), std::regex_constants::grep, 1);
  61     test(F(s2.begin()), F(s2.end()), std::regex_constants::grep, 1);
  62     test(F(s3.begin()), F(s3.end()), std::regex_constants::grep, 2);
  63     test(F(s4.begin()), F(s4.end()), std::regex_constants::grep, 0);
  64
  65     test(F(s1.begin()), F(s1.end()), std::regex_constants::egrep, 0);
  66     test(F(s2.begin()), F(s2.end()), std::regex_constants::egrep, 0);
  67     test(F(s3.begin()), F(s3.end()), std::regex_constants::egrep, 0);
  68     test(F(s4.begin()), F(s4.end()), std::regex_constants::egrep, 2);
  69
  70   return 0;
  71 }