libstdc++-v3/testsuite/23_containers/span/at.cc

   1 // { dg-do run { target c++26 } }
   2
   3 #include <span>
   4 #include <stdexcept>
   5 #include <testsuite_hooks.h>
   6
   7 void
   8 test_at()
   9 {
  10   int arr[4]{0, 1, 2, 3};
  11   std::span<int> s(arr);
  12   VERIFY(s.at(2) == 2);
  13 #if __cpp_exceptions
  14   try {
  15     s.at(4); // { dg-warning "ignoring return value" "" { target exceptions_enabled } }
  16     VERIFY(false);
  17   } catch (const std::out_of_range&) {
  18   }
  19 #endif
  20
  21   auto s2 = s.subspan(1, 2);
  22   VERIFY(s2.at(0) == 1);
  23   VERIFY(s2.at(1) == 2);
  24 #if __cpp_exceptions
  25   try {
  26     s2.at(2); // { dg-warning "ignoring return value" "" { target exceptions_enabled } }
  27     VERIFY(false);
  28   } catch (const std::out_of_range&) {
  29   }
  30 #endif
  31 }
  32
  33 int main()
  34 {
  35   test_at();
  36 }