libstdc++-v3/testsuite/std/ranges/adaptors/lwg3715.cc

   1 // { dg-do run { target c++23 } }
   2
   3 // Verify LWG 3715 changes.
   4
   5 #include <ranges>
   6 #include <sstream>
   7 #include <testsuite_hooks.h>
   8
   9 void
  10 test01()
  11 {
  12   std::istringstream ints("0 1 2 3 4");
  13   auto i = std::views::istream<int>(ints);
  14   auto r4 = std::views::counted(i.begin(), 4) | std::views::chunk(2);
  15   VERIFY( !r4.empty() );
  16 }
  17
  18 void
  19 test02()
  20 {
  21   std::istringstream ints("0 1 2 3 4");
  22   auto i = std::views::istream<int>(ints);
  23   auto r0 = std::views::counted(i.begin(), 0) | std::views::chunk(2);
  24   VERIFY( r0.empty() );
  25 }
  26
  27 int
  28 main()
  29 {
  30   test01();
  31   test02();
  32 }