libstdc++-v3/testsuite/20_util/is_empty/incomplete_neg.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2019-2021 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // Expect the compiler builtin to do the completeness check.
  21 // { dg-error "incomplete type" "" { target *-*-* } 0 }
  22
  23 #include <type_traits>
  24
  25 class X;
  26
  27 void test01()
  28 {
  29   std::is_empty<X>();           // { dg-error "required from here" }
  30 }