binders.hpp

C++的一个好库。。。现在很流行

    operator()(CT& obj) const
    { return impl::as_ptr<CT>::get(obj)->*ptr; }

    mem_var_ptr_t ptr;
};

//////////////////////////////////
template <typename T, typename ClassT>
struct member_var_ptr
:   public function<member_var_ptr_action<T, ClassT> > {

    member_var_ptr(T ClassT::*mp)
    :   function<member_var_ptr_action<T, ClassT> >
        (member_var_ptr_action<T, ClassT>(mp)) {}
};

//////////////////////////////////
template <typename T, typename ClassT>
inline member_var_ptr<T, ClassT>
bind(T ClassT::*mp)
{
    return member_var_ptr<T, ClassT>(mp);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (main class)
//
///////////////////////////////////////////////////////////////////////////////
template <
    typename RT
    ,   typename A = nil_t
    ,   typename B = nil_t
    ,   typename C = nil_t

#if PHOENIX_LIMIT > 3
    ,   typename D = nil_t
    ,   typename E = nil_t
    ,   typename F = nil_t

#if PHOENIX_LIMIT > 6
    ,   typename G = nil_t
    ,   typename H = nil_t
    ,   typename I = nil_t

#if PHOENIX_LIMIT > 9
    ,   typename J = nil_t
    ,   typename K = nil_t
    ,   typename L = nil_t

#if PHOENIX_LIMIT > 12
    ,   typename M = nil_t
    ,   typename N = nil_t
    ,   typename O = nil_t

#endif
#endif
#endif
#endif

    ,   typename NU = nil_t  // Not used
>
struct function_ptr_action;

//////////////////////////////////
template <
    typename RT
    ,   typename A = nil_t
    ,   typename B = nil_t
    ,   typename C = nil_t

#if PHOENIX_LIMIT > 3
    ,   typename D = nil_t
    ,   typename E = nil_t
    ,   typename F = nil_t

#if PHOENIX_LIMIT > 6
    ,   typename G = nil_t
    ,   typename H = nil_t
    ,   typename I = nil_t

#if PHOENIX_LIMIT > 9
    ,   typename J = nil_t
    ,   typename K = nil_t
    ,   typename L = nil_t

#if PHOENIX_LIMIT > 12
    ,   typename M = nil_t
    ,   typename N = nil_t
    ,   typename O = nil_t

#endif
#endif
#endif
#endif
>
struct function_ptr
:   public function<function_ptr_action<RT
    , A, B, C
#if PHOENIX_LIMIT > 3
    , D, E, F
#if PHOENIX_LIMIT > 6
    , G, H, I
#if PHOENIX_LIMIT > 9
    , J, K, L
#if PHOENIX_LIMIT > 12
    , M, N, O
#endif
#endif
#endif
#endif
    > > {

    typedef function_ptr_action<RT
        , A, B, C
#if PHOENIX_LIMIT > 3
        , D, E, F
#if PHOENIX_LIMIT > 6
        , G, H, I
#if PHOENIX_LIMIT > 9
        , J, K, L
#if PHOENIX_LIMIT > 12
        , M, N, O
#endif
#endif
#endif
#endif
    > action_t;

    template <typename FPT>
    function_ptr(FPT fp)
    :   function<action_t>(action_t(fp)) {}
};

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 0 arg)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT>
struct function_ptr_action<RT,
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)();

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()() const
    { return fptr(); }

    func_ptr_t fptr;
};

//////////////////////////////////
template <typename RT>
inline function_ptr<RT>
bind(RT(*fptr)())
{
    return function_ptr<RT>(fptr);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 1 arg)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT, typename A>
struct function_ptr_action<RT,
    A, nil_t, nil_t,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)(A);

    template <typename A_>
    struct result { typedef result_type type; };

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()(A a) const
    { return fptr(a); }

    func_ptr_t fptr;
};

//////////////////////////////////
template <typename RT, typename A>
inline function_ptr<RT, A>
bind(RT(*fptr)(A))
{
    return function_ptr<RT, A>(fptr);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 2 args)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT, typename A, typename B>
struct function_ptr_action<RT,
    A, B, nil_t,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)(A, B);

    template <typename A_, typename B_>
    struct result { typedef result_type type; };

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()(A a, B b) const
    { return fptr(a, b); }

    func_ptr_t fptr;
};

//////////////////////////////////
template <typename RT, typename A, typename B>
inline function_ptr<RT, A, B>
bind(RT(*fptr)(A, B))
{
    return function_ptr<RT, A, B>(fptr);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 3 args)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT, typename A, typename B, typename C>
struct function_ptr_action<RT,
    A, B, C,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)(A, B, C);

    template <typename A_, typename B_, typename C_>
    struct result { typedef result_type type; };

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()(A a, B b, C c) const
    { return fptr(a, b, c); }

    func_ptr_t fptr;
};

//////////////////////////////////
template <typename RT, typename A, typename B, typename C>
inline function_ptr<RT, A, B, C>
bind(RT(*fptr)(A, B, C))
{
    return function_ptr<RT, A, B, C>(fptr);
}

#if PHOENIX_LIMIT > 3
///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 4 args)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT, typename A, typename B, typename C, typename D>
struct function_ptr_action<RT,
    A, B, C, D, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)(A, B, C, D);

    template <typename A_, typename B_, typename C_, typename D_>
    struct result { typedef result_type type; };

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()(A a, B b, C c, D d) const
    { return fptr(a, b, c, d); }

    func_ptr_t fptr;
};

//////////////////////////////////
template <typename RT, typename A, typename B, typename C, typename D>
inline function_ptr<RT, A, B, C, D>
bind(RT(*fptr)(A, B, C, D))
{
    return function_ptr<RT, A, B, C, D>(fptr);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 5 args)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT,
    typename A, typename B, typename C, typename D, typename E
>
struct function_ptr_action<RT,
    A, B, C, D, E, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)(A, B, C, D, E);

    template <
        typename A_, typename B_, typename C_, typename D_, typename E_
    >
    struct result { typedef result_type type; };

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()(
        A a, B b, C c, D d, E e
    ) const
    { return fptr(a, b, c, d, e); }

    func_ptr_t fptr;
};

//////////////////////////////////
template <typename RT,
    typename A, typename B, typename C, typename D, typename E
>
inline function_ptr<RT, A, B, C, D, E>
bind(RT(*fptr)(A, B, C, D, E))
{
    return function_ptr<RT, A, B, C, D, E>(fptr);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Function pointer binder (specialization for 6 args)
//
///////////////////////////////////////////////////////////////////////////////
template <typename RT,
    typename A, typename B, typename C, typename D, typename E,
    typename F
>
struct function_ptr_action<RT,
    A, B, C, D, E, F,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
    nil_t   //  Unused
> {

    typedef RT result_type;
    typedef RT(*func_ptr_t)(A, B, C, D, E, F);

    template <
        typename A_, typename B_, typename C_, typename D_, typename E_,
        typename F_
    >
    struct result { typedef result_type type; };

    function_ptr_action(func_ptr_t fptr_)
    :   fptr(fptr_) {}

    result_type operator()(
        A a, B b, C c, D d, E e,
        F f
    ) const
    { return fptr(a, b, c, d, e, f); }

    func_ptr_t fptr;
};