msgpack/cpp/type/tuple.hpp.erb

//
// MessagePack for C++ static resolution routine
//
// Copyright (C) 2008-2009 FURUHASHI Sadayuki
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//
#ifndef MSGPACK_TYPE_TUPLE_HPP__
#define MSGPACK_TYPE_TUPLE_HPP__

#include "msgpack/object.hpp"

namespace msgpack {

namespace type {

// FIXME operator==
// FIXME operator!=
<% GENERATION_LIMIT = 15 %>

template <typename A0 = void<%1.upto(GENERATION_LIMIT+1) {|i|%>, typename A<%=i%> = void<%}%>>
struct tuple;

template <typename Tuple, int N>
struct tuple_element;

template <typename Tuple, int N>
struct const_tuple_element;

template <typename T>
struct tuple_type {
	typedef T type;
	typedef T value_type;
	typedef T& reference;
	typedef const T& const_reference;
	typedef const T& transparent_reference;
};

template <typename T>
struct tuple_type<T&> {
	typedef T type;
	typedef T& value_type;
	typedef T& reference;
	typedef const T& const_reference;
	typedef T& transparent_reference;
};

template <typename T>
struct tuple_type<const T&> {
	typedef T type;
	typedef T& value_type;
	typedef T& reference;
	typedef const T& const_reference;
	typedef const T& transparent_reference;
};

<%0.upto(GENERATION_LIMIT) {|i|%>
<%0.upto(i) {|j|%>
template <typename A0<%1.upto(i) {|k|%>, typename A<%=k%><%}%>>
struct tuple_element<tuple<A0<%1.upto(i) {|k|%>, A<%=k%><%}%>>, <%=j%>> : tuple_type<A<%=j%>> {
	tuple_element(tuple<A0<%1.upto(i) {|k|%>, A<%=k%> <%}%>>& x) : _x(x.a<%=j%>) {}
	typename tuple_type<A<%=j%>>::reference get() { return _x; }
	typename tuple_type<A<%=j%>>::const_reference get() const { return _x; }
private:
	typename tuple_type<A<%=j%>>::reference _x;
};
<%}%>
<%}%>

<%0.upto(GENERATION_LIMIT) {|i|%>
<%0.upto(i) {|j|%>
template <typename A0<%1.upto(i) {|k|%>, typename A<%=k%><%}%>>
struct const_tuple_element<tuple<A0<%1.upto(i) {|k|%>, A<%=k%><%}%>>, <%=j%>> : tuple_type<A<%=j%>> {
	const_tuple_element(const tuple<A0<%1.upto(i) {|k|%>, A<%=k%><%}%>>& x) : _x(x.a<%=j%>) {}
	typename tuple_type<A<%=j%>>::const_reference get() const { return _x; }
private:
	typename tuple_type<A<%=j%>>::const_reference _x;
};
<%}%>
<%}%>

template <>
struct tuple<> {
	typedef tuple<> value_type;
};
<%0.upto(GENERATION_LIMIT) {|i|%>
template <typename A0<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
struct tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> {
	typedef tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> value_type;
	tuple() {}
	tuple(typename tuple_type<A0>::transparent_reference _a0<%1.upto(i) {|j|%>, typename tuple_type<A<%=j%>>::transparent_reference _a<%=j%><%}%>) :
		a0(_a0)<%1.upto(i) {|j|%>, a<%=j%>(_a<%=j%>)<%}%> {}
	tuple(object o) { o.convert(this); }
	template <int N> typename tuple_element<value_type, N>::reference get()
		{ return tuple_element<value_type, N>(*this).get(); }
	template <int N> typename const_tuple_element<value_type, N>::const_reference get() const
		{ return const_tuple_element<value_type, N>(*this).get(); }
	<%0.upto(i) {|j|%>
	A<%=j%> a<%=j%>;<%}%>
};
<%}%>

inline tuple<> make_tuple()
{
	return tuple<>();
}
<%0.upto(GENERATION_LIMIT) {|i|%>
template <typename A0<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> make_tuple(typename tuple_type<A0>::transparent_reference a0<%1.upto(i) {|j|%>, typename tuple_type<A<%=j%>>::transparent_reference a<%=j%><%}%>)
{
	return tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>>(a0<%1.upto(i) {|j|%>, a<%=j%><%}%>);
}
<%}%>

}  // namespace type


inline type::tuple<>& operator>> (
		object o,
		type::tuple<>& v) {
	if(o.type != type::ARRAY) { throw type_error(); }
	return v;
}
<%0.upto(GENERATION_LIMIT) {|i|%>
template <typename A0<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
type::tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>>& operator>> (
		object o,
		type::tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>>& v) {
	if(o.type != type::ARRAY) { throw type_error(); }
	if(o.via.array.size < <%=i+1%>) { throw type_error(); }
	<%0.upto(i) {|j|%>
	o.via.array.ptr[<%=j%>].convert<A<%=j%>>(&v.template get<<%=j%>>());<%}%>
	return v;
}
<%}%>

template <typename Stream>
const packer<Stream>& operator<< (
		packer<Stream>& o,
		const type::tuple<>& v) {
	o.pack_array(0);
	return o;
}
<%0.upto(GENERATION_LIMIT) {|i|%>
template <typename Stream, typename A0<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
const packer<Stream>& operator<< (
		packer<Stream>& o,
		const type::tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>>& v) {
	o.pack_array(<%=i+1%>);
	<%0.upto(i) {|j|%>
	o.pack(v.template get<<%=j%>>());<%}%>
	return o;
}
<%}%>

}  // namespace msgpack

#endif /* msgpack/type/tuple.hpp */