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// -*- C++ -*-
// Copyright (C) 2005 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice and
// this permission notice appear in supporting documentation. None of
// the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied warranty.
/**
* @file typelist.h
* Contains typelist_chain definitions.
* Typelists are an idea by Andrei Alexandrescu.
*/
#ifndef TYPELIST_HPP
#define TYPELIST_HPP
namespace __gnu_cxx
{
// XXX namespace typelist
// struct typelist -> struct node
struct null_type { };
template<typename Root>
struct typelist
{
typedef Root root;
};
// Forward declarations of functors.
template<typename Hd, typename Typelist>
struct chain
{
typedef Hd head;
typedef Typelist tail;
};
template<typename Typelist0, typename Typelist1>
struct append;
template<typename Typelist_Typelist>
struct typelist_append;
template<typename Typelist, typename T>
struct contains;
template<typename Typelist, template<typename T> class Pred>
struct filter;
template<typename Typelist, int i>
struct at_index;
template<typename Fn, typename Typelist>
struct apply;
template<typename Typelist, template<typename T> class Transform>
struct transform;
}
namespace __gnu_cxx
{
namespace detail
{
// #include <ext/detail/type_utils.h>
template<typename Type>
struct type_to_type
{
typedef Type type;
};
template<bool Cond, typename A, typename B>
struct cond_type;
template<typename A, typename B>
struct cond_type<true, A, B>
{
typedef A type;
};
template<typename A, typename B>
struct cond_type<false, A, B>
{
typedef B type;
};
// #include <ext/detail/apply.h>
template<typename Fn, typename Typelist_Chain>
struct apply_;
template<typename Fn, typename Hd, typename Tl>
struct apply_<Fn, chain<Hd, Tl> >
{
void
operator() (Fn& f)
{
f.operator()(type_to_type<Hd>());
apply_<Fn, Tl> next;
next(f);
}
};
template<typename Fn>
struct apply_<Fn, null_type>
{
void
operator()(Fn&) { }
};
// #include <ext/detail/append.h>
template<typename Typelist_Chain0, typename Typelist_Chain1>
struct append_;
template<typename Hd, typename Tl, typename Typelist_Chain>
struct append_<chain<Hd, Tl>, Typelist_Chain>
{
typedef append_<Tl, Typelist_Chain> append_type;
typedef chain<Hd, typename append_type::type> type;
};
template<typename Typelist_Chain>
struct append_<null_type, Typelist_Chain>
{
typedef Typelist_Chain type;
};
// #include <ext/detail/contains.h>
template<typename Typelist_Chain, typename T>
struct contains_;
template<typename T>
struct contains_<null_type, T>
{
enum
{
value = false
};
};
template<typename Hd, typename Tl, typename T>
struct contains_<chain<Hd, Tl>, T>
{
enum
{
value = contains_<Tl, T>::value
};
};
template<typename Tl, typename T>
struct contains_<chain<T, Tl>, T>
{
enum
{
value = true
};
};
// #include <ext/detail/filter.h>
template<typename Typelist_Chain, template<typename T> class Pred>
struct chain_filter_;
template<template<typename T> class Pred>
struct chain_filter_<null_type, Pred>
{
typedef null_type type;
};
template<typename Hd, typename Tl, template<typename T> class Pred>
struct chain_filter_<chain<Hd, Tl>, Pred>
{
enum
{
include_hd = Pred<Hd>::value
};
typedef typename chain_filter_<Tl, Pred>::type rest_type;
typedef chain<Hd, rest_type> chain_type;
typedef typename cond_type<include_hd, chain_type, rest_type>::type type;
};
// #include <ext/detail/at_index.h>
template<typename Typelist_Chain, int i>
struct chain_at_index_;
template<typename Hd, typename Tl>
struct chain_at_index_<chain<Hd, Tl>, 0>
{
typedef Hd type;
};
template<typename Hd, typename Tl, int i>
struct chain_at_index_<chain<Hd, Tl>, i>
{
typedef typename chain_at_index_<Tl, i - 1>::type type;
};
// #include <ext/detail/transform.h>
template<class Typelist_Chain, template<typename T> class Transform>
struct chain_transform_;
template<template<typename T> class Transform>
struct chain_transform_<null_type, Transform>
{
typedef null_type type;
};
template<class Hd, class Tl, template<typename T> class Transform>
struct chain_transform_<chain<Hd, Tl>, Transform>
{
typedef typename chain_transform_<Tl, Transform>::type rest_type;
typedef typename Transform<Hd>::type transform_type;
typedef chain<transform_type, rest_type> type;
};
// #include <ext/detail/typelist_append.h>
template<typename Typelist_Typelist_Chain>
struct typelist_append_;
template<typename Hd>
struct typelist_append_<chain<Hd, null_type> >
{
typedef chain<Hd, null_type> type;
};
template<typename Hd, typename Tl>
struct typelist_append_<chain< Hd, Tl> >
{
private:
typedef typename typelist_append_<Tl>::type rest;
public:
typedef typename append<Hd, typelist<rest> >::type::root type;
};
} // namespace detail
}
namespace __gnu_cxx
{
template<typename Fn, typename Typelist>
struct apply
{
void
operator()(Fn& f)
{
typedef typename Typelist::root root_type;
detail::apply_<Fn, root_type> a;
a(f);
}
};
template<typename Typelist0, typename Typelist1>
struct append
{
private:
typedef typename Typelist0::root root0_type;
typedef typename Typelist1::root root1_type;
typedef detail::append_<root0_type, root1_type> append_type;
public:
typedef typelist<typename append_type::type> type;
};
template<typename Typelist_Typelist>
struct typelist_append
{
private:
typedef typename Typelist_Typelist::root root_type;
typedef detail::typelist_append_<root_type> append_type;
public:
typedef typelist<typename append_type::type> type;
};
template<typename Typelist, typename T>
struct contains
{
typedef typename Typelist::root root_type;
enum
{
value = detail::contains_<root_type, T>::value
};
};
template<typename Typelist, template<typename T> class Pred>
struct filter
{
private:
typedef typename Typelist::root root_type;
typedef detail::chain_filter_<root_type, Pred> filter_type;
public:
typedef typelist<typename filter_type::type> type;
};
template<typename Typelist, int i>
struct at_index
{
typedef typename Typelist::root root_type;
typedef detail::chain_at_index_<root_type, i> index_type;
typedef typename index_type::type type;
};
template<typename Typelist, template<typename T> class Transform>
struct transform
{
private:
typedef typename Typelist::root root_type;
typedef detail::chain_transform_<root_type, Transform> transform_type;
public:
typedef typelist<typename transform_type::type> type;
};
} // namespace __gnu_cxx
#define _GLIBCXX_TYPELIST_CHAIN1(X0) __gnu_cxx::chain<X0, __gnu_cxx::null_type>
#define _GLIBCXX_TYPELIST_CHAIN2(X0, X1) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN1(X1) >
#define _GLIBCXX_TYPELIST_CHAIN3(X0, X1, X2) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN2(X1, X2) >
#define _GLIBCXX_TYPELIST_CHAIN4(X0, X1, X2, X3) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN3(X1, X2, X3) >
#define _GLIBCXX_TYPELIST_CHAIN5(X0, X1, X2, X3, X4) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN4(X1, X2, X3, X4) >
#define _GLIBCXX_TYPELIST_CHAIN6(X0, X1, X2, X3, X4, X5) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN5(X1, X2, X3, X4, X5) >
#define _GLIBCXX_TYPELIST_CHAIN7(X0, X1, X2, X3, X4, X5, X6) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN6(X1, X2, X3, X4, X5, X6) >
#define _GLIBCXX_TYPELIST_CHAIN8(X0, X1, X2, X3, X4, X5, X6, X7) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN7(X1, X2, X3, X4, X5, X6, X7) >
#define _GLIBCXX_TYPELIST_CHAIN9(X0, X1, X2, X3, X4, X5, X6, X7, X8) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN8(X1, X2, X3, X4, X5, X6, X7, X8) >
#define _GLIBCXX_TYPELIST_CHAIN10(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN9(X1, X2, X3, X4, X5, X6, X7, X8, X9) >
#define _GLIBCXX_TYPELIST_CHAIN11(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN10(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10) >
#define _GLIBCXX_TYPELIST_CHAIN12(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN11(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11) >
#define _GLIBCXX_TYPELIST_CHAIN13(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN12(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12) >
#define _GLIBCXX_TYPELIST_CHAIN14(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN13(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13) >
#define _GLIBCXX_TYPELIST_CHAIN15(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14) __gnu_cxx::chain<X0, _GLIBCXX_TYPELIST_CHAIN14(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14) >
#endif
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