re PR libstdc++/55463 (Result of std::mem_fn doesn't accept rvalues)
PR libstdc++/55463 * include/std/functional (_Mem_fn): Handle rvalue objects. Add noexcept-specifications. * testsuite/20_util/function_objects/mem_fn/55463.cc: New. * testsuite/20_util/bind/ref_neg.cc: Adjust dg-error line numbers. From-SVN: r193831
This commit is contained in:
parent
d5b8b24b12
commit
5127244e4b
|
@ -1,3 +1,11 @@
|
|||
2012-11-26 Jonathan Wakely <jwakely.gcc@gmail.com>
|
||||
|
||||
PR libstdc++/55463
|
||||
* include/std/functional (_Mem_fn): Handle rvalue objects. Add
|
||||
noexcept-specifications.
|
||||
* testsuite/20_util/function_objects/mem_fn/55463.cc: New.
|
||||
* testsuite/20_util/bind/ref_neg.cc: Adjust dg-error line numbers.
|
||||
|
||||
2012-11-23 Jonathan Wakely <jwakely.gcc@gmail.com>
|
||||
|
||||
PR libstdc++/52680
|
||||
|
|
|
@ -65,7 +65,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|||
class _Mem_fn;
|
||||
template<typename _Tp, typename _Class>
|
||||
_Mem_fn<_Tp _Class::*>
|
||||
mem_fn(_Tp _Class::*);
|
||||
mem_fn(_Tp _Class::*) noexcept;
|
||||
|
||||
_GLIBCXX_HAS_NESTED_TYPE(result_type)
|
||||
|
||||
|
@ -528,13 +528,16 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __object, const volatile _Class *,
|
||||
_M_call(_Tp&& __object, const volatile _Class *,
|
||||
_ArgTypes... __args) const
|
||||
{ return (__object.*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
{
|
||||
return (std::forward<_Tp>(__object).*__pmf)
|
||||
(std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
_M_call(_Tp&& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
{ return ((*__ptr).*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
public:
|
||||
|
@ -555,12 +558,17 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
// Handle smart pointers, references and pointers to derived
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
operator()(_Tp& __object, _ArgTypes... __args) const
|
||||
operator()(_Tp&& __object, _ArgTypes... __args) const
|
||||
{
|
||||
return _M_call(__object, &__object,
|
||||
return _M_call(std::forward<_Tp>(__object), &__object,
|
||||
std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
operator()(reference_wrapper<_Tp> __ref, _ArgTypes... __args) const
|
||||
{ return operator()(__ref.get(), std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
private:
|
||||
_Functor __pmf;
|
||||
};
|
||||
|
@ -575,13 +583,16 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __object, const volatile _Class *,
|
||||
_M_call(_Tp&& __object, const volatile _Class *,
|
||||
_ArgTypes... __args) const
|
||||
{ return (__object.*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
{
|
||||
return (std::forward<_Tp>(__object).*__pmf)
|
||||
(std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
_M_call(_Tp&& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
{ return ((*__ptr).*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
public:
|
||||
|
@ -601,12 +612,17 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
|
||||
// Handle smart pointers, references and pointers to derived
|
||||
template<typename _Tp>
|
||||
_Res operator()(_Tp& __object, _ArgTypes... __args) const
|
||||
_Res operator()(_Tp&& __object, _ArgTypes... __args) const
|
||||
{
|
||||
return _M_call(__object, &__object,
|
||||
return _M_call(std::forward<_Tp>(__object), &__object,
|
||||
std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
operator()(reference_wrapper<_Tp> __ref, _ArgTypes... __args) const
|
||||
{ return operator()(__ref.get(), std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
private:
|
||||
_Functor __pmf;
|
||||
};
|
||||
|
@ -621,13 +637,16 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __object, const volatile _Class *,
|
||||
_M_call(_Tp&& __object, const volatile _Class *,
|
||||
_ArgTypes... __args) const
|
||||
{ return (__object.*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
{
|
||||
return (std::forward<_Tp>(__object).*__pmf)
|
||||
(std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
_M_call(_Tp&& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
{ return ((*__ptr).*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
public:
|
||||
|
@ -648,12 +667,17 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
// Handle smart pointers, references and pointers to derived
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
operator()(_Tp& __object, _ArgTypes... __args) const
|
||||
operator()(_Tp&& __object, _ArgTypes... __args) const
|
||||
{
|
||||
return _M_call(__object, &__object,
|
||||
return _M_call(std::forward<_Tp>(__object), &__object,
|
||||
std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
operator()(reference_wrapper<_Tp> __ref, _ArgTypes... __args) const
|
||||
{ return operator()(__ref.get(), std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
private:
|
||||
_Functor __pmf;
|
||||
};
|
||||
|
@ -668,13 +692,16 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __object, const volatile _Class *,
|
||||
_M_call(_Tp&& __object, const volatile _Class *,
|
||||
_ArgTypes... __args) const
|
||||
{ return (__object.*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
{
|
||||
return (std::forward<_Tp>(__object).*__pmf)
|
||||
(std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
_M_call(_Tp&& __ptr, const volatile void *, _ArgTypes... __args) const
|
||||
{ return ((*__ptr).*__pmf)(std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
public:
|
||||
|
@ -694,12 +721,17 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
|
||||
// Handle smart pointers, references and pointers to derived
|
||||
template<typename _Tp>
|
||||
_Res operator()(_Tp& __object, _ArgTypes... __args) const
|
||||
_Res operator()(_Tp&& __object, _ArgTypes... __args) const
|
||||
{
|
||||
return _M_call(__object, &__object,
|
||||
return _M_call(std::forward<_Tp>(__object), &__object,
|
||||
std::forward<_ArgTypes>(__args)...);
|
||||
}
|
||||
|
||||
template<typename _Tp>
|
||||
_Res
|
||||
operator()(reference_wrapper<_Tp> __ref, _ArgTypes... __args) const
|
||||
{ return operator()(__ref.get(), std::forward<_ArgTypes>(__args)...); }
|
||||
|
||||
private:
|
||||
_Functor __pmf;
|
||||
};
|
||||
|
@ -720,91 +752,75 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
template<typename _Res, typename _Class>
|
||||
class _Mem_fn<_Res _Class::*>
|
||||
{
|
||||
using __pm_type = _Res _Class::*;
|
||||
|
||||
// This bit of genius is due to Peter Dimov, improved slightly by
|
||||
// Douglas Gregor.
|
||||
// Made less elegant by Jonathan Wakely to support perfect forwarding.
|
||||
template<typename _Tp>
|
||||
_Res&
|
||||
_M_call(_Tp& __object, _Class *) const
|
||||
{ return __object.*__pm; }
|
||||
auto
|
||||
_M_call(_Tp&& __object, const _Class *) const noexcept
|
||||
-> decltype(std::forward<_Tp>(__object).*std::declval<__pm_type&>())
|
||||
{ return std::forward<_Tp>(__object).*__pm; }
|
||||
|
||||
template<typename _Tp, typename _Up>
|
||||
_Res&
|
||||
_M_call(_Tp& __object, _Up * const *) const
|
||||
{ return (*__object).*__pm; }
|
||||
|
||||
template<typename _Tp, typename _Up>
|
||||
const _Res&
|
||||
_M_call(_Tp& __object, const _Up * const *) const
|
||||
{ return (*__object).*__pm; }
|
||||
auto
|
||||
_M_call(_Tp&& __object, _Up * const *) const noexcept
|
||||
-> decltype((*std::forward<_Tp>(__object)).*std::declval<__pm_type&>())
|
||||
{ return (*std::forward<_Tp>(__object)).*__pm; }
|
||||
|
||||
template<typename _Tp>
|
||||
const _Res&
|
||||
_M_call(_Tp& __object, const _Class *) const
|
||||
{ return __object.*__pm; }
|
||||
|
||||
template<typename _Tp>
|
||||
const _Res&
|
||||
_M_call(_Tp& __ptr, const volatile void*) const
|
||||
auto
|
||||
_M_call(_Tp&& __ptr, const volatile void*) const
|
||||
noexcept(noexcept((*__ptr).*std::declval<__pm_type&>()))
|
||||
-> decltype((*__ptr).*std::declval<__pm_type&>())
|
||||
{ return (*__ptr).*__pm; }
|
||||
|
||||
template<typename _Tp> static _Tp& __get_ref();
|
||||
|
||||
template<typename _Tp>
|
||||
static __sfinae_types::__one __check_const(_Tp&, _Class*);
|
||||
template<typename _Tp, typename _Up>
|
||||
static __sfinae_types::__one __check_const(_Tp&, _Up * const *);
|
||||
template<typename _Tp, typename _Up>
|
||||
static __sfinae_types::__two __check_const(_Tp&, const _Up * const *);
|
||||
template<typename _Tp>
|
||||
static __sfinae_types::__two __check_const(_Tp&, const _Class*);
|
||||
template<typename _Tp>
|
||||
static __sfinae_types::__two __check_const(_Tp&, const volatile void*);
|
||||
|
||||
public:
|
||||
template<typename _Tp>
|
||||
struct _Result_type
|
||||
: _Mem_fn_const_or_non<_Res,
|
||||
(sizeof(__sfinae_types::__two)
|
||||
== sizeof(__check_const<_Tp>(__get_ref<_Tp>(), (_Tp*)0)))>
|
||||
{ };
|
||||
|
||||
template<typename _Signature>
|
||||
struct result;
|
||||
|
||||
template<typename _CVMem, typename _Tp>
|
||||
struct result<_CVMem(_Tp)>
|
||||
: public _Result_type<_Tp> { };
|
||||
|
||||
template<typename _CVMem, typename _Tp>
|
||||
struct result<_CVMem(_Tp&)>
|
||||
: public _Result_type<_Tp> { };
|
||||
|
||||
explicit
|
||||
_Mem_fn(_Res _Class::*__pm) : __pm(__pm) { }
|
||||
_Mem_fn(_Res _Class::*__pm) noexcept : __pm(__pm) { }
|
||||
|
||||
// Handle objects
|
||||
_Res&
|
||||
operator()(_Class& __object) const
|
||||
operator()(_Class& __object) const noexcept
|
||||
{ return __object.*__pm; }
|
||||
|
||||
const _Res&
|
||||
operator()(const _Class& __object) const
|
||||
operator()(const _Class& __object) const noexcept
|
||||
{ return __object.*__pm; }
|
||||
|
||||
_Res&&
|
||||
operator()(_Class&& __object) const noexcept
|
||||
{ return std::forward<_Class>(__object).*__pm; }
|
||||
|
||||
const _Res&&
|
||||
operator()(const _Class&& __object) const noexcept
|
||||
{ return std::forward<const _Class>(__object).*__pm; }
|
||||
|
||||
// Handle pointers
|
||||
_Res&
|
||||
operator()(_Class* __object) const
|
||||
operator()(_Class* __object) const noexcept
|
||||
{ return __object->*__pm; }
|
||||
|
||||
const _Res&
|
||||
operator()(const _Class* __object) const
|
||||
operator()(const _Class* __object) const noexcept
|
||||
{ return __object->*__pm; }
|
||||
|
||||
// Handle smart pointers and derived
|
||||
template<typename _Tp>
|
||||
typename _Result_type<_Tp>::type
|
||||
operator()(_Tp& __unknown) const
|
||||
{ return _M_call(__unknown, &__unknown); }
|
||||
auto
|
||||
operator()(_Tp&& __unknown) const
|
||||
noexcept(noexcept(std::declval<_Mem_fn*>()->_M_call
|
||||
(std::forward<_Tp>(__unknown), &__unknown)))
|
||||
-> decltype(this->_M_call(std::forward<_Tp>(__unknown), &__unknown))
|
||||
{ return _M_call(std::forward<_Tp>(__unknown), &__unknown); }
|
||||
|
||||
template<typename _Tp>
|
||||
auto
|
||||
operator()(reference_wrapper<_Tp> __ref) const
|
||||
noexcept(noexcept(std::declval<_Mem_fn&>()(__ref.get())))
|
||||
-> decltype((*this)(__ref.get()))
|
||||
{ return operator()(__ref.get()); }
|
||||
|
||||
private:
|
||||
_Res _Class::*__pm;
|
||||
|
@ -819,7 +835,7 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
|
|||
*/
|
||||
template<typename _Tp, typename _Class>
|
||||
inline _Mem_fn<_Tp _Class::*>
|
||||
mem_fn(_Tp _Class::* __pm)
|
||||
mem_fn(_Tp _Class::* __pm) noexcept
|
||||
{
|
||||
return _Mem_fn<_Tp _Class::*>(__pm);
|
||||
}
|
||||
|
|
|
@ -30,10 +30,10 @@ void test01()
|
|||
{
|
||||
const int dummy = 0;
|
||||
std::bind(&inc, _1)(0); // { dg-error "no match" }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1208 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1222 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1236 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1250 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1224 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1238 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1252 }
|
||||
// { dg-error "rvalue|const" "" { target *-*-* } 1266 }
|
||||
std::bind(&inc, std::ref(dummy))(); // { dg-error "no match" }
|
||||
}
|
||||
|
||||
|
|
|
@ -0,0 +1,78 @@
|
|||
// { dg-options "-std=gnu++11" }
|
||||
// { dg-do compile }
|
||||
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
// PR libstdc++/55463 Passing rvalue objects to std::mem_fn
|
||||
|
||||
#include <functional>
|
||||
|
||||
struct X
|
||||
{
|
||||
int& func();
|
||||
char& func_c() const;
|
||||
short& func_v() volatile;
|
||||
double& func_cv() const volatile;
|
||||
|
||||
int data;
|
||||
};
|
||||
|
||||
using CX = const X;
|
||||
|
||||
struct smart_ptr
|
||||
{
|
||||
X& operator*() const;
|
||||
};
|
||||
|
||||
std::reference_wrapper<X> ref();
|
||||
std::reference_wrapper<const X> cref();
|
||||
|
||||
void test01()
|
||||
{
|
||||
int& i1 = std::mem_fn( &X::func )( X() );
|
||||
int& i2 = std::mem_fn( &X::func )( smart_ptr() );
|
||||
int& i3 = std::mem_fn( &X::func )( ref() );
|
||||
|
||||
char& c1 = std::mem_fn( &X::func_c )( X() );
|
||||
char& c2 = std::mem_fn( &X::func_c )( CX() );
|
||||
char& c3 = std::mem_fn( &X::func_c )( smart_ptr() );
|
||||
char& c4 = std::mem_fn( &X::func_c )( ref() );
|
||||
char& c5 = std::mem_fn( &X::func_c )( cref() );
|
||||
|
||||
short& s1 = std::mem_fn( &X::func_v )( X() );
|
||||
short& s2 = std::mem_fn( &X::func_v )( smart_ptr() );
|
||||
short& s3 = std::mem_fn( &X::func_v )( ref() );
|
||||
|
||||
double& d1 = std::mem_fn( &X::func_cv )( X() );
|
||||
double& d2 = std::mem_fn( &X::func_cv )( CX() );
|
||||
double& d3 = std::mem_fn( &X::func_cv )( smart_ptr() );
|
||||
double& d4 = std::mem_fn( &X::func_cv )( ref() );
|
||||
double& d5 = std::mem_fn( &X::func_cv )( cref() );
|
||||
|
||||
// [expr.mptr.oper]
|
||||
// The result of a .* expression whose second operand is a pointer to a
|
||||
// data member is of the same value category (3.10) as its first operand.
|
||||
int&& rval = std::mem_fn( &X::data )( X() );
|
||||
const int&& crval = std::mem_fn( &X::data )( CX() );
|
||||
|
||||
int& sval = std::mem_fn( &X::data )( smart_ptr() );
|
||||
|
||||
int& val = std::mem_fn( &X::data )( ref() );
|
||||
const int& cval = std::mem_fn( &X::data )( cref() );
|
||||
}
|
||||
|
Loading…
Reference in New Issue