libstdc++-v3/testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc

   1 // { dg-do run { target c++20 } }
   2
   3 #include <regex>
   4 #include <iterator>
   5 #include <testsuite_hooks.h>
   6
   7 // LWG 3719. Directory iterators should be usable with default sentinel
   8
   9 void
  10 test_iter()
  11 {
  12   std::sregex_iterator r0;
  13   VERIFY( r0 == std::default_sentinel );
  14   std::string haystack = "a needle in a haystack";
  15   std::regex needle("needle");
  16   std::sregex_iterator r1(haystack.begin(), haystack.end(), needle);
  17   VERIFY( r1 != std::default_sentinel );
  18   ++r1;
  19   VERIFY( r1 == std::default_sentinel );
  20
  21   static_assert( noexcept(r0 == std::default_sentinel) ); // GCC extension
  22   static_assert( noexcept(r0 != std::default_sentinel) ); // GCC extension
  23 }
  24
  25 int main()
  26 {
  27   test_iter();
  28 }