libstdc++-v3/testsuite/23_containers/array/creation/3_neg.cc

   1 // { dg-options "-Wno-unused-result" }
   2 // { dg-do compile { target c++20 } }
   3
   4 // Copyright (C) 2019-2025 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <array>
  22
  23 void
  24 test01()
  25 {
  26   int two_dee[3][4];
  27   std::to_array(two_dee); // { dg-error "here" }
  28 }
  29
  30 void
  31 test02()
  32 {
  33   struct X
  34   {
  35     int two_dee[3][4];
  36   };
  37   std::to_array(X{}.two_dee); // { dg-error "here" }
  38 }
  39
  40 void
  41 test03()
  42 {
  43   struct MoveOnly
  44   {
  45     MoveOnly() = default;
  46     MoveOnly(MoveOnly&&) = default;
  47   };
  48
  49   MoveOnly mo[2];
  50   std::to_array(mo); // { dg-error "here" }
  51
  52   const MoveOnly cmo[3];
  53   std::to_array(std::move(cmo)); // { dg-error "here" }
  54 }
  55
  56 // { dg-prune-output "static assertion failed" }