libstdc++-v3/testsuite/25_algorithms/contains/1.cc

   1 // { dg-do run { target c++23 } }
   2
   3 #include <algorithm>
   4 #include <testsuite_hooks.h>
   5 #include <testsuite_iterators.h>
   6
   7 #if __cpp_lib_ranges_contains != 202207L
   8 # error "Feature-test macro __cpp_lib_ranges_contains has wrong value in <algorithm>"
   9 #endif
  10
  11 namespace ranges = std::ranges;
  12
  13 void
  14 test01()
  15 {
  16   int x[] = {1,2,3};
  17   using to_input = __gnu_test::test_input_range<int>;
  18   VERIFY( ranges::contains(to_input(x), 1) );
  19   VERIFY( ranges::contains(to_input(x), 2) );
  20   VERIFY( ranges::contains(to_input(x), 3) );
  21   VERIFY( !ranges::contains(to_input(x), 4) );
  22   VERIFY( !ranges::contains(x, x+2, 3) );
  23   auto neg = [](int n) { return -n; };
  24   VERIFY( ranges::contains(to_input(x), -1, neg) );
  25   VERIFY( ranges::contains(to_input(x), -2, neg) );
  26   VERIFY( ranges::contains(to_input(x), -3, neg) );
  27   VERIFY( !ranges::contains(to_input(x), -4, neg) );
  28
  29   VERIFY( !ranges::contains(x, x+2, -3, neg) );
  30 }
  31
  32 int
  33 main()
  34 {
  35   test01();
  36 }