155 lines
4.4 KiB
C++
155 lines
4.4 KiB
C++
// { dg-do run { target c++11 } }
|
|
// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
|
|
//
|
|
// Copyright (C) 2005-2021 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;
|
|
}
|