libcxx/test/std/re/re.results/re.results.acc/cbegin_cend.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 // class match_results<BidirectionalIterator, Allocator>
  12
  13 // const_iterator cbegin() const;
  14 // const_iterator cend() const;
  15
  16 #include <regex>
  17 #include <cassert>
  18 #include <cstddef>
  19 #include "test_macros.h"
  20
  21 void
  22 test()
  23 {
  24     std::match_results<const char*> m;
  25     const char s[] = "abcdefghijk";
  26     assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));
  27
  28     std::match_results<const char*>::const_iterator i = m.cbegin();
  29     std::match_results<const char*>::const_iterator e = m.cend();
  30
  31     assert(static_cast<std::size_t>(e - i) == m.size());
  32     for (int j = 0; i != e; ++i, ++j)
  33         assert(*i == m[j]);
  34 }
  35
  36 int main(int, char**)
  37 {
  38     test();
  39
  40   return 0;
  41 }