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/* Copyright 2016-2017 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_FUNCTION_MODEL_HPP
#define BOOST_POLY_COLLECTION_DETAIL_FUNCTION_MODEL_HPP
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/core/addressof.hpp>
#include <boost/poly_collection/detail/callable_wrapper.hpp>
#include <boost/poly_collection/detail/callable_wrapper_iterator.hpp>
#include <boost/poly_collection/detail/is_invocable.hpp>
#include <boost/poly_collection/detail/segment_backend.hpp>
#include <boost/poly_collection/detail/split_segment.hpp>
#include <memory>
#include <type_traits>
#include <typeinfo>
#include <utility>
namespace boost{
namespace poly_collection{
namespace detail{
/* model for function_collection */
template<typename Signature>
struct function_model;
/* is_terminal defined out-class to allow for partial specialization */
template<typename T>
struct function_model_is_terminal:std::true_type{};
template<typename Signature>
struct function_model_is_terminal<callable_wrapper<Signature>>:
std::false_type{};
template<typename R,typename... Args>
struct function_model<R(Args...)>
{
using value_type=callable_wrapper<R(Args...)>;
template<typename Callable>
using is_subtype=is_invocable_r<R,Callable&,Args...>;
template<typename T>
using is_terminal=function_model_is_terminal<T>;
template<typename T>
static const std::type_info& subtypeid(const T&){return typeid(T);}
template<typename Signature>
static const std::type_info& subtypeid(
const callable_wrapper<Signature>& f)
{
return f.target_type();
}
template<typename T>
static void* subaddress(T& x){return boost::addressof(x);}
template<typename T>
static const void* subaddress(const T& x){return boost::addressof(x);}
template<typename Signature>
static void* subaddress(callable_wrapper<Signature>& f)
{
return f.data();
}
template<typename Signature>
static const void* subaddress(const callable_wrapper<Signature>& f)
{
return f.data();
}
using base_iterator=callable_wrapper_iterator<value_type>;
using const_base_iterator=callable_wrapper_iterator<const value_type>;
using base_sentinel=value_type*;
using const_base_sentinel=const value_type*;
template<typename Callable>
using iterator=Callable*;
template<typename Callable>
using const_iterator=const Callable*;
using segment_backend=detail::segment_backend<function_model>;
template<typename Callable,typename Allocator>
using segment_backend_implementation=split_segment<
function_model,
Callable,
typename std::allocator_traits<Allocator>::
template rebind_alloc<Callable>
>;
using segment_backend_unique_ptr=
typename segment_backend::segment_backend_unique_ptr;
static base_iterator nonconst_iterator(const_base_iterator it)
{
return base_iterator{
const_cast<value_type*>(static_cast<const value_type*>(it))};
}
template<typename T>
static iterator<T> nonconst_iterator(const_iterator<T> it)
{
return const_cast<iterator<T>>(it);
}
template<typename Callable,typename Allocator>
static segment_backend_unique_ptr make(const Allocator& al)
{
return segment_backend_implementation<Callable,Allocator>::new_(al,al);
}
private:
template<typename,typename,typename>
friend class split_segment;
template<typename Callable>
static value_type make_value_type(Callable& x){return value_type{x};}
};
} /* namespace poly_collection::detail */
} /* namespace poly_collection */
} /* namespace boost */
#endif
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