libstdc++-v3/testsuite/tr1/3_function_objects/function/8.cc

   1 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
   2 //
   3 // Copyright (C) 2005-2021 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 // 3.7.2 polymorphic function object wrapper
  21 #include <tr1/functional>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_tr1.h>
  24
  25 using namespace __gnu_test;
  26
  27 // Put reference_wrappers to member pointers
  28 void test08()
  29 {
  30   using std::tr1::function;
  31   using std::tr1::ref;
  32   using std::tr1::cref;
  33
  34   int X::* X_bar = &X::bar;
  35   int (X::* X_foo)() = &X::foo;
  36   int (X::* X_foo_c)() const = &X::foo_c;
  37   int (X::* X_foo_v)() volatile = &X::foo_v;
  38   int (X::* X_foo_cv)() const volatile = &X::foo_cv;
  39
  40   X x;
  41   x.bar = 17;
  42
  43   function<int(X&)> frm(ref(X_bar));
  44   VERIFY( frm );
  45   VERIFY( frm(x) == 17 );
  46   VERIFY( typeid(int X::*) == frm.target_type() );
  47   VERIFY( frm.target<int X::*>() == &X_bar );
  48
  49   function<int(X&)> fr(ref(X_foo));
  50   VERIFY( fr );
  51   VERIFY( fr(x) == 1 );
  52   VERIFY( typeid(int (X::*)()) == fr.target_type() );
  53   VERIFY( fr.target<int (X::*)()>() == &X_foo );
  54
  55   function<int(const X&)> frc(ref(X_foo_c));
  56   VERIFY( frc );
  57   VERIFY( frc(x) == 2 );
  58   VERIFY( typeid(int (X::*)() const) == frc.target_type() );
  59   VERIFY( frc.target<int (X::*)() const >() == &X_foo_c );
  60
  61   function<int(volatile X&)> frv(ref(X_foo_v));
  62   VERIFY( frv );
  63   VERIFY( frv(x) == 3 );
  64   VERIFY( typeid(int (X::*)() volatile) == frv.target_type() );
  65   VERIFY( *frv.target<int (X::*)() volatile >() == X_foo_v );
  66   VERIFY( frv.target<int (X::*)() const volatile>() == 0 );
  67
  68   function<int(const volatile X&)> frcv(ref(X_foo_cv));
  69   VERIFY( frcv );
  70   VERIFY( frcv(x) == 4 );
  71   VERIFY( typeid(int (X::*)() const volatile) == frcv.target_type() );
  72   VERIFY( *frcv.target<int (X::*)() const volatile >() == X_foo_cv );
  73   VERIFY( frcv.target<int (X::*)() const>() == 0 );
  74
  75   function<int(X*)> grm(ref(X_bar));
  76   VERIFY( grm );
  77   VERIFY( grm(&x) == 17 );
  78   VERIFY( typeid(int X::*) == grm.target_type() );
  79   VERIFY( *grm.target<int X::*>() == X_bar );
  80
  81   function<int(X*)> gr(ref(X_foo));
  82   VERIFY( gr );
  83   VERIFY( gr(&x) == 1 );
  84   VERIFY( typeid(int (X::*)()) == gr.target_type() );
  85   VERIFY( *gr.target<int (X::*)()>() == X_foo );
  86
  87   function<int(const X*)> grc(ref(X_foo_c));
  88   VERIFY( grc );
  89   VERIFY( grc(&x) == 2 );
  90   VERIFY( typeid(int (X::*)() const) == grc.target_type() );
  91   VERIFY( *grc.target<int (X::*)() const >() == X_foo_c );
  92
  93   function<int(volatile X*)> grv(ref(X_foo_v));
  94   VERIFY( grv );
  95   VERIFY( grv(&x) == 3 );
  96   VERIFY( typeid(int (X::*)() volatile) == grv.target_type() );
  97   VERIFY( *grv.target<int (X::*)() volatile >() == X_foo_v );
  98   VERIFY( grv.target<int (X::*)() const volatile>() == 0 );
  99
 100   function<int(const volatile X*)> grcv(ref(X_foo_cv));
 101   VERIFY( grcv );
 102   VERIFY( grcv(&x) == 4 );
 103   VERIFY( typeid(int (X::*)() const volatile) == grcv.target_type() );
 104   VERIFY( *grcv.target<int (X::*)() const volatile >() == X_foo_cv );
 105   VERIFY( grcv.target<int (X::*)() const>() == 0 );
 106
 107   function<int(X&)> hrm(cref(X_bar));
 108   VERIFY( hrm );
 109   VERIFY( hrm(x) == 17 );
 110   VERIFY( typeid(int X::*) == hrm.target_type() );
 111   VERIFY( hrm.target<int X::*>() == 0 );
 112   VERIFY( hrm.target<int X::* const>() == &X_bar );
 113
 114   function<int(X&)> hr(cref(X_foo));
 115   VERIFY( hr );
 116   VERIFY( hr(x) == 1 );
 117   VERIFY( typeid(int (X::*)()) == hr.target_type() );
 118   VERIFY( hr.target<int (X::* const)()>() == &X_foo );
 119
 120   function<int(const X&)> hrc(cref(X_foo_c));
 121   VERIFY( hrc );
 122   VERIFY( hrc(x) == 2 );
 123   VERIFY( typeid(int (X::*)() const) == hrc.target_type() );
 124   VERIFY( hrc.target<int (X::* const)() const >() == &X_foo_c );
 125
 126   function<int(volatile X&)> hrv(cref(X_foo_v));
 127   VERIFY( hrv );
 128   VERIFY( hrv(x) == 3 );
 129   VERIFY( typeid(int (X::*)() volatile) == hrv.target_type() );
 130   VERIFY( hrv.target<int (X::* const)() volatile >() == &X_foo_v );
 131   VERIFY( hrv.target<int (X::* const)() const volatile>() == 0 );
 132
 133   function<int(const volatile X&)> hrcv(cref(X_foo_cv));
 134   VERIFY( hrcv );
 135   VERIFY( hrcv(x) == 4 );
 136   VERIFY( typeid(int (X::*)() const volatile) == hrcv.target_type() );
 137   VERIFY( hrcv.target<int (X::* const)() const volatile >() == &X_foo_cv );
 138   VERIFY( hrcv.target<int (X::* const)() const>() == 0 );
 139 }
 140
 141 int main()
 142 {
 143   test08();
 144   return 0;
 145 }