/usr/include/boost/poly_collection/detail
Edit: /usr/include/boost/poly_collection/detail/any_iterator.hpp (2356B)
/* Copyright 2016 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/poly_collection for library home page.
*/
#ifndef BOOST_POLY_COLLECTION_DETAIL_ANY_ITERATOR_HPP
#define BOOST_POLY_COLLECTION_DETAIL_ANY_ITERATOR_HPP
#if defined(_MSC_VER)
#pragma once
#endif
#include
#include
#include
#include
namespace boost{
namespace poly_collection{
namespace detail{
/* type_erasure::any* adaptor convertible to pointer to wrapped
* entity.
*/
template
class any_iterator:public boost::iterator_adaptor,Any*>
{
public:
any_iterator()=default;
explicit any_iterator(Any* p)noexcept:any_iterator::iterator_adaptor_{p}{}
any_iterator(const any_iterator&)=default;
any_iterator& operator=(const any_iterator&)=default;
template<
typename NonConstAny,
typename std::enable_if<
std::is_same::value>::type* =nullptr
>
any_iterator(const any_iterator& x)noexcept:
any_iterator::iterator_adaptor_{x.base()}{}
template<
typename NonConstAny,
typename std::enable_if<
std::is_same::value>::type* =nullptr
>
any_iterator& operator=(const any_iterator& x)noexcept
{
this->base_reference()=x.base();
return *this;
}
/* interoperability with Any* */
any_iterator& operator=(Any* p)noexcept
{this->base_reference()=p;return *this;}
operator Any*()const noexcept{return this->base();}
/* interoperability with Concrete* */
template<
typename Concrete,
typename std::enable_if<
/* can't compile-time check concept compliance */
!std::is_const::value||std::is_const::value
>::type* =nullptr
>
explicit operator Concrete*()const noexcept
{
return const_cast(
static_cast::type*>(
type_erasure::any_cast(this->base())));
}
private:
template
friend class any_iterator;
};
} /* namespace poly_collection::detail */
} /* namespace poly_collection */
} /* namespace boost */
#endif