libstdc++-v3/testsuite/20_util/function/target_no_rtti.cc

   1 // { dg-options "-fno-rtti" }
   2 // { dg-do run { target c++11 } }
   3 // { dg-require-effective-target hosted }
   4
   5 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <functional>
  23 #include <testsuite_hooks.h>
  24
  25 using std::function;
  26
  27 long f() { return 1; }
  28 struct F { long operator()() {  return 2; } };
  29
  30 void test01()
  31 {
  32   std::function<int()> fun = f;
  33   long (**tgt1)() = fun.target<long(*)()>();
  34   VERIFY( *tgt1 == f );
  35   VERIFY( (*tgt1)() == 1L );
  36   VERIFY( fun.target<long(*)()>() == tgt1 );
  37   VERIFY( fun.target<long(* const)()>() == tgt1 );
  38   VERIFY( fun.target<F>() == nullptr );
  39   VERIFY( fun.target<void>() == nullptr );
  40   VERIFY( fun.target<int()>() == nullptr );
  41   VERIFY( fun.target<long()>() == nullptr );
  42
  43   const F ff;
  44   fun = ff;
  45   F* tgt2 = fun.target<F>();
  46   VERIFY( tgt2 != nullptr );
  47   VERIFY( (*tgt2)() == 2L );
  48   VERIFY( fun.target<const F>() == tgt2 );
  49   VERIFY( fun.target<int(*)()>() == nullptr );
  50   VERIFY( fun.target<void()>() == nullptr );
  51   VERIFY( fun.target<void(*)()>() == nullptr );
  52 }
  53
  54 int main()
  55 {
  56   test01();
  57 }