blob: 9770481791f1b4c5d8e3135b10592551ed5d7cf4 [file] [log] [blame]
// { dg-do run { target c++11 } }
// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
//
// Copyright (C) 2005-2022 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 20.7.15 polymorphic function object wrapper
#include <functional>
#include <testsuite_hooks.h>
#include <testsuite_tr1.h>
template<typename T>
const T&
as_const(T& t)
{ return t; }
// Check that f's target is a reference_wrapper bound to obj.
template<typename Function, typename T>
bool
wraps(Function& f, T& obj)
{
using ref_wrapper_type = std::reference_wrapper<T>;
auto* p = f.template target<ref_wrapper_type>();
return std::addressof(p->get()) == std::addressof(obj);
}
// Put reference_wrappers to member pointers
void test08()
{
using std::function;
using std::ref;
using std::cref;
using std::reference_wrapper;
using __gnu_test::X;
int X::* X_bar = &X::bar;
int (X::* X_foo)() = &X::foo;
int (X::* X_foo_c)() const = &X::foo_c;
int (X::* X_foo_v)() volatile = &X::foo_v;
int (X::* X_foo_cv)() const volatile = &X::foo_cv;
X x;
x.bar = 17;
function<int(X&)> frm(ref(X_bar));
VERIFY( frm );
VERIFY( frm(x) == 17 );
VERIFY( typeid(ref(X_bar)) == frm.target_type() );
VERIFY( wraps(frm, X_bar) );
function<int(X&)> fr(ref(X_foo));
VERIFY( fr );
VERIFY( fr(x) == 1 );
VERIFY( typeid(ref(X_foo)) == fr.target_type() );
VERIFY( wraps(fr, X_foo) );
function<int(const X&)> frc(ref(X_foo_c));
VERIFY( frc );
VERIFY( frc(x) == 2 );
VERIFY( typeid(ref(X_foo_c)) == frc.target_type() );
VERIFY( wraps(frc, X_foo_c) );
function<int(volatile X&)> frv(ref(X_foo_v));
VERIFY( frv );
VERIFY( frv(x) == 3 );
VERIFY( typeid(ref(X_foo_v)) == frv.target_type() );
VERIFY( wraps(frv, X_foo_v) );
function<int(const volatile X&)> frcv(ref(X_foo_cv));
VERIFY( frcv );
VERIFY( frcv(x) == 4 );
VERIFY( typeid(ref(X_foo_cv)) == frcv.target_type() );
VERIFY( wraps(frcv, X_foo_cv) );
function<int(X*)> grm(ref(X_bar));
VERIFY( grm );
VERIFY( grm(&x) == 17 );
VERIFY( typeid(ref(X_bar)) == grm.target_type() );
VERIFY( wraps(grm, X_bar) );
function<int(X*)> gr(ref(X_foo));
VERIFY( gr );
VERIFY( gr(&x) == 1 );
VERIFY( typeid(ref(X_foo)) == gr.target_type() );
VERIFY( wraps(gr, X_foo) );
function<int(const X*)> grc(ref(X_foo_c));
VERIFY( grc );
VERIFY( grc(&x) == 2 );
VERIFY( typeid(ref(X_foo_c)) == grc.target_type() );
VERIFY( wraps(grc, X_foo_c) );
function<int(volatile X*)> grv(ref(X_foo_v));
VERIFY( grv );
VERIFY( grv(&x) == 3 );
VERIFY( typeid(ref(X_foo_v)) == grv.target_type() );
VERIFY( wraps(grv, X_foo_v) );
function<int(const volatile X*)> grcv(ref(X_foo_cv));
VERIFY( grcv );
VERIFY( grcv(&x) == 4 );
VERIFY( typeid(ref(X_foo_cv)) == grcv.target_type() );
VERIFY( wraps(grcv, X_foo_cv) );
function<int(X&)> hrm(cref(X_bar));
VERIFY( hrm );
VERIFY( hrm(x) == 17 );
VERIFY( typeid(cref(X_bar)) == hrm.target_type() );
VERIFY( wraps(hrm, as_const(X_bar)) );
function<int(X&)> hr(cref(X_foo));
VERIFY( hr );
VERIFY( hr(x) == 1 );
VERIFY( typeid(cref(X_foo)) == hr.target_type() );
VERIFY( wraps(hr, as_const(X_foo)) );
function<int(const X&)> hrc(cref(X_foo_c));
VERIFY( hrc );
VERIFY( hrc(x) == 2 );
VERIFY( typeid(cref(X_foo_c)) == hrc.target_type() );
VERIFY( wraps(hrc, as_const(X_foo_c)) );
function<int(volatile X&)> hrv(cref(X_foo_v));
VERIFY( hrv );
VERIFY( hrv(x) == 3 );
VERIFY( typeid(cref(X_foo_v)) == hrv.target_type() );
VERIFY( wraps(hrv, as_const(X_foo_v)) );
function<int(const volatile X&)> hrcv(cref(X_foo_cv));
VERIFY( hrcv );
VERIFY( hrcv(x) == 4 );
VERIFY( typeid(cref(X_foo_cv)) == hrcv.target_type() );
VERIFY( wraps(hrcv, as_const(X_foo_cv)) );
}
int main()
{
test08();
return 0;
}