libstdc++-v3/testsuite/tr1/4_metaprogramming/is_empty/value.cc

   1 // 2005-01-28  Paolo Carlini  <pcarlini@suse.de>
   2 //
   3 // Copyright (C) 2005-2019 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 // 4.5.3 Type properties
  21
  22 #include <tr1/type_traits>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_tr1.h>
  25
  26 class EmptyClassOne
  27 { typedef int type; };
  28
  29 class EmptyClassTwo
  30 { static int data; };
  31
  32 class EmptyClassThree
  33 { int f(); };
  34
  35 class NonEmptyClassOne
  36 { int data; };
  37
  38 class NonEmptyClassTwo
  39 {
  40   virtual int f();
  41   virtual ~NonEmptyClassTwo();
  42 };
  43
  44 void test01()
  45 {
  46   using std::tr1::is_empty;
  47   using namespace __gnu_test;
  48
  49   // Positive tests.
  50   VERIFY( (test_category<is_empty, ClassType>(true)) );
  51   VERIFY( (test_category<is_empty, EmptyClassOne>(true)) );
  52   VERIFY( (test_category<is_empty, EmptyClassTwo>(true)) );
  53   VERIFY( (test_category<is_empty, EmptyClassThree>(true)) );
  54
  55   // Negative tests.
  56   VERIFY( (test_category<is_empty, void>(false)) );
  57   VERIFY( (test_category<is_empty, float>(false)) );
  58   VERIFY( (test_category<is_empty, int[4]>(false)) );
  59   VERIFY( (test_category<is_empty, int*>(false)) );
  60   VERIFY( (test_category<is_empty, int&>(false)) );
  61   VERIFY( (test_category<is_empty, int (ClassType::*)>(false)) );
  62   VERIFY( (test_category<is_empty, EnumType>(false)) );
  63   VERIFY( (test_category<is_empty, int (int)>(false)) );
  64
  65   VERIFY( (test_category<is_empty, AbstractClass>(false)) );
  66   VERIFY( (test_category<is_empty, NonEmptyClassOne>(false)) );
  67   VERIFY( (test_category<is_empty, NonEmptyClassTwo>(false)) );
  68 }
  69
  70 int main()
  71 {
  72   test01();
  73   return 0;
  74 }