77 lines
1.6 KiB
C++
77 lines
1.6 KiB
C++
|
/* Copyright 2003-2021 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_DETAIL_ANY_CONTAINER_VIEW_HPP
|
||
|
|
#define BOOST_MULTI_INDEX_DETAIL_ANY_CONTAINER_VIEW_HPP
|
||
|
|
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace boost{
|
||
|
|
|
||
|
|
namespace multi_index{
|
||
|
|
|
||
|
|
namespace detail{
|
||
|
|
|
||
|
|
/* type-erased, non-owning view over a ConstIterator-container's range */
|
||
|
|
|
||
|
|
template<typename ConstIterator>
|
||
|
|
class any_container_view
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
template<typename Container>
|
||
|
|
any_container_view(const Container& x):px(&x),pt(vtable_for<Container>()){}
|
||
|
|
|
||
|
|
const void* container()const{return px;}
|
||
|
|
ConstIterator begin()const{return pt->begin(px);}
|
||
|
|
ConstIterator end()const{return pt->end(px);}
|
||
|
|
|
||
|
|
private:
|
||
|
|
struct vtable
|
||
|
|
{
|
||
|
|
ConstIterator (*begin)(const void*);
|
||
|
|
ConstIterator (*end)(const void*);
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename Container>
|
||
|
|
static ConstIterator begin_for(const void* px)
|
||
|
|
{
|
||
|
|
return static_cast<const Container*>(px)->begin();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename Container>
|
||
|
|
static ConstIterator end_for(const void* px)
|
||
|
|
{
|
||
|
|
return static_cast<const Container*>(px)->end();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename Container>
|
||
|
|
vtable* vtable_for()
|
||
|
|
{
|
||
|
|
static vtable v=
|
||
|
|
{
|
||
|
|
&begin_for<Container>,
|
||
|
|
&end_for<Container>
|
||
|
|
};
|
||
|
|
|
||
|
|
return &v;
|
||
|
|
}
|
||
|
|
|
||
|
|
const void* px;
|
||
|
|
vtable* pt;
|
||
|
|
};
|
||
|
|
|
||
|
|
} /* namespace multi_index::detail */
|
||
|
|
|
||
|
|
} /* namespace multi_index */
|
||
|
|
|
||
|
|
} /* namespace boost */
|
||
|
|
|
||
|
|
#endif
|