new.hpp

C++的一个好库。。。现在很流行

/*=============================================================================
    Phoenix V1.2.1
    Copyright (c) 2001-2003 Joel de Guzman
    Copyright (c) 2001-2003 Hartmut Kaiser
    Copyright (c) 2003 Vaclav Vesely

    Use, modification and distribution is subject to 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)
==============================================================================*/

#ifndef PHOENIX_NEW_HPP
#define PHOENIX_NEW_HPP

///////////////////////////////////////////////////////////////////////////////
#include <boost/spirit/phoenix/actor.hpp>
#include <boost/spirit/phoenix/composite.hpp>
#include <boost/static_assert.hpp>

///////////////////////////////////////////////////////////////////////////////
namespace phoenix {

///////////////////////////////////////////////////////////////////////////////
//
//  Phoenix predefined maximum new_ limit. This limit defines the maximum
//  number of parameters supported for calles to the set of new_ template
//  functions (lazy object construction, see below). This number defaults to 3.
//  The actual maximum is rounded up in multiples of 3. Thus, if this value
//  is 4, the actual limit is 6. The ultimate maximum limit in this
//  implementation is 15.
//  PHOENIX_CONSTRUCT_LIMIT should NOT be greater than PHOENIX_LIMIT!

#if !defined(PHOENIX_CONSTRUCT_LIMIT)
#define PHOENIX_CONSTRUCT_LIMIT PHOENIX_LIMIT
#endif

// ensure PHOENIX_CONSTRUCT_LIMIT <= PHOENIX_LIMIT
BOOST_STATIC_ASSERT(PHOENIX_CONSTRUCT_LIMIT <= PHOENIX_LIMIT);

// ensure PHOENIX_CONSTRUCT_LIMIT <= 15
BOOST_STATIC_ASSERT(PHOENIX_CONSTRUCT_LIMIT <= 15);

///////////////////////////////////////////////////////////////////////////////
//
//  new_
//
//      Lazy object construction
//
//      The set of new_<> template classes and functions provide a way
//      of lazily constructing certain object from a arbitrary set of
//      actors during parsing.
//      The new_ templates are (syntactically) used very much like
//      the well known C++ casts:
//
//          A *a = new_<A>(...arbitrary list of actors...);
//
//      where the given parameters are submitted as parameters to the
//      contructor of the object of type A. (This certainly implies, that
//      type A has a constructor with a fitting set of parameter types
//      defined.)
//
//      The maximum number of needed parameters is controlled through the
//      preprocessor constant PHOENIX_CONSTRUCT_LIMIT. Note though, that this
//      limit should not be greater than PHOENIX_LIMIT.
//
///////////////////////////////////////////////////////////////////////////////

template <typename T>
struct new_l_0
{
    typedef T* result_type;

    T* operator()() const
    {
        return new T();
    }
};

template <typename T>
struct new_l {

    template <
            typename A
        ,   typename B
        ,   typename C

#if PHOENIX_CONSTRUCT_LIMIT > 3
        ,   typename D
        ,   typename E
        ,   typename F

#if PHOENIX_CONSTRUCT_LIMIT > 6
        ,   typename G
        ,   typename H
        ,   typename I

#if PHOENIX_CONSTRUCT_LIMIT > 9
        ,   typename J
        ,   typename K
        ,   typename L

#if PHOENIX_CONSTRUCT_LIMIT > 12
        ,   typename M
        ,   typename N
        ,   typename O
#endif
#endif
#endif
#endif
    >
    struct result { typedef T* type; };

    T* operator()() const {
        return new T();
    }

    template <typename A>
    T* operator()(A const& a) const {
        return new T(a);
    }

    template <typename A, typename B>
    T* operator()(A const& a, B const& b) const {
        return new T(a, b);
    }

    template <typename A, typename B, typename C>
    T* operator()(A const& a, B const& b, C const& c) const {
        return new T(a, b, c);
    }

#if PHOENIX_CONSTRUCT_LIMIT > 3
    template <
        typename A, typename B, typename C, typename D
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d) const
    {
        return new T(a, b, c, d);
    }

    template <
        typename A, typename B, typename C, typename D, typename E
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e) const
    {
        return new T(a, b, c, d, e);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f) const
    {
        return new T(a, b, c, d, e, f);
    }

#if PHOENIX_CONSTRUCT_LIMIT > 6
    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g) const
    {
        return new T(a, b, c, d, e, f, g);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h) const
    {
        return new T(a, b, c, d, e, f, g, h);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i) const
    {
        return new T(a, b, c, d, e, f, g, h, i);
    }

#if PHOENIX_CONSTRUCT_LIMIT > 9
    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I, typename J
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i, J const& j) const
    {
        return new T(a, b, c, d, e, f, g, h, i, j);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I, typename J,
        typename K
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i, J const& j,
        K const& k) const
    {
        return new T(a, b, c, d, e, f, g, h, i, j, k);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I, typename J,
        typename K, typename L
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i, J const& j,
        K const& k, L const& l) const
    {
        return new T(a, b, c, d, e, f, g, h, i, j, k, l);
    }

#if PHOENIX_CONSTRUCT_LIMIT > 12
    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I, typename J,
        typename K, typename L, typename M
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i, J const& j,
        K const& k, L const& l, M const& m) const
    {
        return new T(a, b, c, d, e, f, g, h, i, j, k, l, m);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I, typename J,
        typename K, typename L, typename M, typename N
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i, J const& j,
        K const& k, L const& l, M const& m, N const& n) const
    {
        return new T(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
    }

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G, typename H, typename I, typename J,
        typename K, typename L, typename M, typename N, typename O
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g, H const& h, I const& i, J const& j,
        K const& k, L const& l, M const& m, N const& n, O const& o) const
    {
        return new T(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
    }

#endif
#endif
#endif
#endif
};

template <typename T>
struct new_1 {

    template <
            typename A
    >
    struct result { typedef T* type; };

    template <typename A>
    T* operator()(A const& a) const {
        return new T(a);
    }

};

template <typename T>
struct new_2 {

    template <
            typename A
        ,   typename B
    >
    struct result { typedef T* type; };

    template <typename A, typename B>
    T* operator()(A const& a, B const& b) const {
        return new T(a, b);
    }

};

template <typename T>
struct new_3 {

    template <
            typename A
        ,   typename B
        ,   typename C
    >
    struct result { typedef T* type; };

    template <typename A, typename B, typename C>
    T* operator()(A const& a, B const& b, C const& c) const {
        return new T(a, b, c);
    }
};

#if PHOENIX_CONSTRUCT_LIMIT > 3
template <typename T>
struct new_4 {

    template <
            typename A
        ,   typename B
        ,   typename C
        ,   typename D
    >
    struct result { typedef T* type; };


    template <
        typename A, typename B, typename C, typename D
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d) const
    {
        return new T(a, b, c, d);
    }
};


template <typename T>
struct new_5 {

    template <
            typename A
        ,   typename B
        ,   typename C
        ,   typename D
        ,   typename E
    >
    struct result { typedef T* type; };

    template <
        typename A, typename B, typename C, typename D, typename E
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e) const
    {
        return new T(a, b, c, d, e);
    }
};


template <typename T>
struct new_6 {

    template <
            typename A
        ,   typename B
        ,   typename C
        ,   typename D
        ,   typename E
        ,   typename F
    >
    struct result { typedef T* type; };

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f) const
    {
        return new T(a, b, c, d, e, f);
    }
};
#endif


#if PHOENIX_CONSTRUCT_LIMIT > 6
template <typename T>
struct new_7 {

    template <
            typename A
        ,   typename B
        ,   typename C
        ,   typename D
        ,   typename E
        ,   typename F
        ,   typename G
    >
    struct result { typedef T* type; };

    template <
        typename A, typename B, typename C, typename D, typename E,
        typename F, typename G
    >
    T* operator()(
        A const& a, B const& b, C const& c, D const& d, E const& e,
        F const& f, G const& g) const
    {
        return new T(a, b, c, d, e, f, g);
    }
};

template <typename T>
struct new_8 {

    template <
            typename A
        ,   typename B
        ,   typename C
        ,   typename D
        ,   typename E
        ,   typename F
        ,   typename G
        ,   typename H