libstdc++-v3/testsuite/25_algorithms/move/constexpr.cc

   1 // { dg-do compile { target c++20 } }
   2
   3 #include <algorithm>
   4 #include <span>
   5
   6 constexpr bool
   7 test01()
   8 {
   9   // PR libstdc++/102358
  10   int x[2] = {1,2}, y[2];
  11   std::span in(x), out(y);
  12   std::move(std::move_iterator(in.begin()), std::move_iterator(in.end()),
  13             out.begin());
  14   return std::equal(std::move_iterator(in.begin()), std::move_iterator(in.end()),
  15                     std::move_iterator(out.begin()));
  16 }
  17
  18 static_assert(test01());
  19
  20 constexpr bool
  21 test02()
  22 {
  23   int x[2] = {1,2}, y[2];
  24   std::span in(x), out(y);
  25   std::move(in.rbegin(), in.rend(), out.rbegin());
  26   return std::equal(in.rbegin(), in.rend(), out.rbegin());
  27 }
  28
  29 static_assert(test02());