280 lines
7.2 KiB
C++
280 lines
7.2 KiB
C++
|
/* Copyright 2003-2019 Joaquin M Lopez Munoz.
|
||
|
|
* Distributed under the Boost Software License, Version 1.0.
|
||
|
|
* (See accompanying file LICENSE_1_0.txt or copy at
|
||
|
|
* http://www.boost.org/LICENSE_1_0.txt)
|
||
|
|
*
|
||
|
|
* See http://www.boost.org/libs/multi_index for library home page.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef BOOST_MULTI_INDEX_MEM_FUN_HPP
|
||
|
|
#define BOOST_MULTI_INDEX_MEM_FUN_HPP
|
||
|
|
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
|
||
|
|
#include <boost/mpl/if.hpp>
|
||
|
|
#include <boost/type_traits/remove_reference.hpp>
|
||
|
|
#include <boost/utility/enable_if.hpp>
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_SFINAE)
|
||
|
|
#include <boost/type_traits/is_convertible.hpp>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace boost{
|
||
|
|
|
||
|
|
template<class T> class reference_wrapper; /* fwd decl. */
|
||
|
|
|
||
|
|
namespace multi_index{
|
||
|
|
|
||
|
|
/* mem_fun implements a read-only key extractor based on a given non-const
|
||
|
|
* member function of a class.
|
||
|
|
* Also, the following variations are provided:
|
||
|
|
* const_mem_fun: const member functions
|
||
|
|
* volatile_mem_fun: volatile member functions
|
||
|
|
* cv_mem_fun: const volatile member functions
|
||
|
|
* ref_mem_fun: ref-qualifed member functions (C++11)
|
||
|
|
* cref_mem_fun: const ref-qualifed member functions (C++11)
|
||
|
|
* vref_mem_fun: volatile ref-qualifed member functions (C++11)
|
||
|
|
* cvref_mem_fun: const volatile ref-qualifed member functions (C++11)
|
||
|
|
*
|
||
|
|
* All of these classes are overloaded to support boost::referece_wrappers
|
||
|
|
* of T and "chained pointers" to T's. By chained pointer to T we mean a type
|
||
|
|
* P such that, given a p of Type P
|
||
|
|
* *...n...*x is convertible to T&, for some n>=1.
|
||
|
|
* Examples of chained pointers are raw and smart pointers, iterators and
|
||
|
|
* arbitrary combinations of these (vg. T** or unique_ptr<T*>.)
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace detail{
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,
|
||
|
|
typename PtrToMemberFunctionType,PtrToMemberFunctionType PtrToMemberFunction
|
||
|
|
>
|
||
|
|
struct const_mem_fun_impl
|
||
|
|
{
|
||
|
|
typedef typename remove_reference<Type>::type result_type;
|
||
|
|
|
||
|
|
template<typename ChainedPtr>
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_SFINAE)
|
||
|
|
typename disable_if<
|
||
|
|
is_convertible<const ChainedPtr&,const Class&>,Type>::type
|
||
|
|
#else
|
||
|
|
Type
|
||
|
|
#endif
|
||
|
|
|
||
|
|
operator()(const ChainedPtr& x)const
|
||
|
|
{
|
||
|
|
return operator()(*x);
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const Class& x)const
|
||
|
|
{
|
||
|
|
return (x.*PtrToMemberFunction)();
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const reference_wrapper<const Class>& x)const
|
||
|
|
{
|
||
|
|
return operator()(x.get());
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const reference_wrapper<Class>& x)const
|
||
|
|
{
|
||
|
|
return operator()(x.get());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,
|
||
|
|
typename PtrToMemberFunctionType,PtrToMemberFunctionType PtrToMemberFunction
|
||
|
|
>
|
||
|
|
struct mem_fun_impl
|
||
|
|
{
|
||
|
|
typedef typename remove_reference<Type>::type result_type;
|
||
|
|
|
||
|
|
template<typename ChainedPtr>
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_SFINAE)
|
||
|
|
typename disable_if<
|
||
|
|
is_convertible<ChainedPtr&,Class&>,Type>::type
|
||
|
|
#else
|
||
|
|
Type
|
||
|
|
#endif
|
||
|
|
|
||
|
|
operator()(const ChainedPtr& x)const
|
||
|
|
{
|
||
|
|
return operator()(*x);
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(Class& x)const
|
||
|
|
{
|
||
|
|
return (x.*PtrToMemberFunction)();
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const reference_wrapper<Class>& x)const
|
||
|
|
{
|
||
|
|
return operator()(x.get());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
} /* namespace multi_index::detail */
|
||
|
|
|
||
|
|
template<class Class,typename Type,Type (Class::*PtrToMemberFunction)()const>
|
||
|
|
struct const_mem_fun:detail::const_mem_fun_impl<
|
||
|
|
Class,Type,Type (Class::*)()const,PtrToMemberFunction
|
||
|
|
>{};
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,
|
||
|
|
Type (Class::*PtrToMemberFunction)()const volatile
|
||
|
|
>
|
||
|
|
struct cv_mem_fun:detail::const_mem_fun_impl<
|
||
|
|
Class,Type,Type (Class::*)()const volatile,PtrToMemberFunction
|
||
|
|
>{};
|
||
|
|
|
||
|
|
template<class Class,typename Type,Type (Class::*PtrToMemberFunction)()>
|
||
|
|
struct mem_fun:
|
||
|
|
detail::mem_fun_impl<Class,Type,Type (Class::*)(),PtrToMemberFunction>{};
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,Type (Class::*PtrToMemberFunction)()volatile
|
||
|
|
>
|
||
|
|
struct volatile_mem_fun:detail::mem_fun_impl<
|
||
|
|
Class,Type,Type (Class::*)()volatile,PtrToMemberFunction
|
||
|
|
>{};
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_CXX11_REF_QUALIFIERS)
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,Type (Class::*PtrToMemberFunction)()const&
|
||
|
|
>
|
||
|
|
struct cref_mem_fun:detail::const_mem_fun_impl<
|
||
|
|
Class,Type,Type (Class::*)()const&,PtrToMemberFunction
|
||
|
|
>{};
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,
|
||
|
|
Type (Class::*PtrToMemberFunction)()const volatile&
|
||
|
|
>
|
||
|
|
struct cvref_mem_fun:detail::const_mem_fun_impl<
|
||
|
|
Class,Type,Type (Class::*)()const volatile&,PtrToMemberFunction
|
||
|
|
>{};
|
||
|
|
|
||
|
|
template<class Class,typename Type,Type (Class::*PtrToMemberFunction)()&>
|
||
|
|
struct ref_mem_fun:
|
||
|
|
detail::mem_fun_impl<Class,Type,Type (Class::*)()&,PtrToMemberFunction>{};
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,Type (Class::*PtrToMemberFunction)()volatile&
|
||
|
|
>
|
||
|
|
struct vref_mem_fun:detail::mem_fun_impl<
|
||
|
|
Class,Type,Type (Class::*)()volatile&,PtrToMemberFunction
|
||
|
|
>{};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* MSVC++ 6.0 has problems with const member functions as non-type template
|
||
|
|
* parameters, somehow it takes them as non-const. const_mem_fun_explicit
|
||
|
|
* workarounds this deficiency by accepting an extra type parameter that
|
||
|
|
* specifies the signature of the member function. The workaround was found at:
|
||
|
|
* Daniel, C.:"Re: weird typedef problem in VC",
|
||
|
|
* news:microsoft.public.vc.language, 21st nov 2002,
|
||
|
|
* http://groups.google.com/groups?
|
||
|
|
* hl=en&lr=&ie=UTF-8&selm=ukwvg3O0BHA.1512%40tkmsftngp05
|
||
|
|
*
|
||
|
|
* MSVC++ 6.0 support has been dropped and [const_]mem_fun_explicit is
|
||
|
|
* deprecated.
|
||
|
|
*/
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,
|
||
|
|
typename PtrToMemberFunctionType,PtrToMemberFunctionType PtrToMemberFunction
|
||
|
|
>
|
||
|
|
struct const_mem_fun_explicit
|
||
|
|
{
|
||
|
|
typedef typename remove_reference<Type>::type result_type;
|
||
|
|
|
||
|
|
template<typename ChainedPtr>
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_SFINAE)
|
||
|
|
typename disable_if<
|
||
|
|
is_convertible<const ChainedPtr&,const Class&>,Type>::type
|
||
|
|
#else
|
||
|
|
Type
|
||
|
|
#endif
|
||
|
|
|
||
|
|
operator()(const ChainedPtr& x)const
|
||
|
|
{
|
||
|
|
return operator()(*x);
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const Class& x)const
|
||
|
|
{
|
||
|
|
return (x.*PtrToMemberFunction)();
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const reference_wrapper<const Class>& x)const
|
||
|
|
{
|
||
|
|
return operator()(x.get());
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const reference_wrapper<Class>& x)const
|
||
|
|
{
|
||
|
|
return operator()(x.get());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<
|
||
|
|
class Class,typename Type,
|
||
|
|
typename PtrToMemberFunctionType,PtrToMemberFunctionType PtrToMemberFunction
|
||
|
|
>
|
||
|
|
struct mem_fun_explicit
|
||
|
|
{
|
||
|
|
typedef typename remove_reference<Type>::type result_type;
|
||
|
|
|
||
|
|
template<typename ChainedPtr>
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_SFINAE)
|
||
|
|
typename disable_if<
|
||
|
|
is_convertible<ChainedPtr&,Class&>,Type>::type
|
||
|
|
#else
|
||
|
|
Type
|
||
|
|
#endif
|
||
|
|
|
||
|
|
operator()(const ChainedPtr& x)const
|
||
|
|
{
|
||
|
|
return operator()(*x);
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(Class& x)const
|
||
|
|
{
|
||
|
|
return (x.*PtrToMemberFunction)();
|
||
|
|
}
|
||
|
|
|
||
|
|
Type operator()(const reference_wrapper<Class>& x)const
|
||
|
|
{
|
||
|
|
return operator()(x.get());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/* BOOST_MULTI_INDEX_CONST_MEM_FUN and BOOST_MULTI_INDEX_MEM_FUN used to
|
||
|
|
* resolve to [const_]mem_fun_explicit for MSVC++ 6.0 and to
|
||
|
|
* [const_]mem_fun otherwise. Support for this compiler having been dropped,
|
||
|
|
* they are now just wrappers over [const_]mem_fun kept for backwards-
|
||
|
|
* compatibility reasons.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define BOOST_MULTI_INDEX_CONST_MEM_FUN(Class,Type,MemberFunName) \
|
||
|
|
::boost::multi_index::const_mem_fun< Class,Type,&Class::MemberFunName >
|
||
|
|
#define BOOST_MULTI_INDEX_MEM_FUN(Class,Type,MemberFunName) \
|
||
|
|
::boost::multi_index::mem_fun< Class,Type,&Class::MemberFunName >
|
||
|
|
|
||
|
|
} /* namespace multi_index */
|
||
|
|
|
||
|
|
} /* namespace boost */
|
||
|
|
|
||
|
|
#endif
|