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bind.hpp
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bind.hpp
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/**
* @file bind.hpp
* @brief 實作 std::bind 的簡易版
* @author ToyAuthor
* @copyright Public Domain
* <pre>
* 通常能用 bind 取代繼承的場合就別用繼承了
*
* 這個 bind 的實作並不如 boost 那樣經過眾多環境測試
* 至少確定在 Open Watcom 上面是無法通過編譯的
* 因此實作內容也相對的簡單
*
* http://github.com/ToyAuthor/functional
* </pre>
*/
#ifndef _STD_BIND_HPP_
#define _STD_BIND_HPP_
// 判斷編譯器是否為C++11，是就改用標準庫吧
#if __cplusplus > 201100L
#include <functional>
#else
namespace std{
// 將一個type裝成變數來傳遞，用處是藉變數將type傳達進去
template<typename T> struct type{ typedef T value; };
// 這個結構的唯一用途就是可透過數字來辨識自己的type
template<int I> struct Argc{};
// 可將指標包裝的像個參考，用來應付一些你不能丟真正參考的情況
template<typename T>
struct reference_wrapper
{
public:
typedef T type;
explicit reference_wrapper(T &t): t_(&t) {}
operator T& () const { return *t_; }
T& get() const { return *t_; }
T* get_pointer() const { return t_; }
private:
T* t_;
};
//-------------不管輸入的是指標還是參考都會回傳成指標-------------
template<typename T> inline T* get_pointer(T *o){ return o; }
template<typename T> inline T* get_pointer(T &o){ return &o; }
//------------------實現param_traits------------------start
// 不管對象是不是參考都化為原本type
template<typename T> struct untie_ref{ typedef T type; };
template<typename T> struct untie_ref<T&> : untie_ref<T>{};
// 不管對象是不是參考都化為原本type的參考
template<typename T> struct param_traits
{
typedef typename untie_ref<T>::type& type;
};
//------------------實現param_traits------------------end
//------------------實現result_traits------------------start
// 面對一般type直接取名為type
template<typename R> struct result_traits{ typedef R type; };
// 面對用type<>包裝過的type就取其中的result_type為type
template<typename F> struct result_traits<type<F> > : result_traits<typename F::result_type> {};
// 面對用type<>包裝過的type就取其中的result_type為type，為了支援reference_wrapper而寫的版本
template<typename F>
struct result_traits<type<reference_wrapper<F> > > : result_traits<typename F::result_type> {};
//------------------實現result_traits------------------end
// 替對象創造一個reference_wrapper，針對無法拷貝或者拷貝耗時的物件很有用，用法bind(&function,ref(obj))
template<typename T>
inline reference_wrapper<T> ref(T &t)
{
return reference_wrapper<T>(t);
}
// const版的 ref()
template<typename T>
inline reference_wrapper<T const> cref(const T &t)
{
return reference_wrapper<const T>(t);
}
/**
由於是inline函式
所以這裡的函式名稱可以視為附帶編號的macro
藉此實現bind()的placeholder
*/
namespace placeholders{
static inline Argc<1> _1() { return std::Argc<1>(); }
static inline Argc<2> _2() { return std::Argc<2>(); }
static inline Argc<3> _3() { return std::Argc<3>(); }
static inline Argc<4> _4() { return std::Argc<4>(); }
static inline Argc<5> _5() { return std::Argc<5>(); }
static inline Argc<6> _6() { return std::Argc<6>(); }
static inline Argc<7> _7() { return std::Argc<7>(); }
static inline Argc<8> _8() { return std::Argc<8>(); }
static inline Argc<9> _9() { return std::Argc<9>(); }
}
//-------------------------------------storage系列-------------------------------------start
// storage物件負責儲存呼叫function所需的參數們
// 所有storage系列的最底層基底類別
struct storage_base
{
// T並非"Argc<1>(*)()"才會執行本method將這參數傳回
// 另一個版本負責接收"Argc<1>(*)()"然後傳回自己攜帶的參數
template<typename T>
inline T& operator[](T &v) const {return v;}
template<typename T>
inline const T& operator[](const T &v) const{return v;}
// 一樣將參考傳回去，只是接收的不是本尊而是用 reference_wrapper 做出來的假參考
template<typename T>
inline T& operator[](reference_wrapper<T> &v) const {return v.get();}
template<typename T>
inline T& operator[](const reference_wrapper<T> &v) const {return v.get();}
};
//-----------------------------零個參數的storage-----------------------------start
struct storage0 : storage_base
{
using storage_base::operator[];
// 沒有參數的情況下自然不需要那些花招，直接呼叫函式就好 < return type , function , storage >
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S&) const
{
return f();
}
// 得到外部輸入的函式位址並呼叫函式(不知為何，這method不能用operator()多載，明明沒有跟誰衝突啊)
template<typename R, typename F>
inline R Do(type<R>, F &f) const
{
return f();
}
};
//-----------------------------零個參數的storage-----------------------------end
//-----------------------------一個參數的storage-----------------------------start
// D是後面衍生的storage物件
template<typename D>
struct storage1_base : storage0
{
typedef storage0 base;
using base::operator[];
// 接收外部的storage然後將裡面附帶的參數跟bind绑定的參數湊成完整的參數群
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this); // 因為樣板的關係，所以才有機會取得衍生類別的成員
return d[f](s[d.a1_]); // 用多載[]運算子去決定要使用該參數還是用自己的參數(placeholder的情況)
}
};
// 此物件可儲存一個參數
template<typename A1>
struct storage1 : storage1_base<storage1<A1> >
{
typedef storage1_base<storage1<A1> > base;
typedef typename param_traits<A1>::type P1;
typedef typename result_traits<A1>::type result_type;
storage1(P1 p1) : a1_(p1){} // 將綁定的參數儲存起來
// 丟進[]的外部參數若非"Argc<1>(*)()"類型則直接回傳外部參數，自己帶的成員參數"a1_"則沒有用到
using base::operator[];
// 丟進[]的外部參數若是Argc這型的函式指標時，會回傳本物件自己帶的成員參數"a1_"
inline result_type operator[](Argc<1>(*)()) const { return a1_; }
// 得到外部輸入的函式位址並呼叫函式
template<typename R, typename F>
inline R Do(type<R>, F &f) const
{
return f(a1_);
}
A1 a1_; // 此物件儲存的參數
};
// 這個是上面storage1的空殼版本，當bind()的參數欄位被填了placeholder就會選擇此版本
template<int I>
struct storage1<Argc<I>(*)()> : storage1_base<storage1<Argc<I>(*)()> >
{
typedef typename param_traits<Argc<I>(*)()>::type P1;
storage1(P1){} // 建構子允許丟參數進來，但是根本不會去用，因為那只是個placeholder
Argc<I> (*a1_)(void); // 這指標不需要指向何處，重點在於type，Argc<I>的"I"會讓編譯器去找到相呼應的operator[]
};
//-----------------------------一個參數的storage-----------------------------end
//-----------------------------兩個參數的storage-----------------------------start
template<typename D, typename A1>
struct storage2_base : storage1<A1>
{
typedef storage1<A1> base;
using base::operator[];
storage2_base(typename base::P1 p1) : base(p1){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_]);
}
};
template<typename A1, typename A2>
struct storage2 : storage2_base<storage2<A1, A2>, A1>
{
typedef storage2_base<storage2<A1, A2>, A1> base;
typedef typename param_traits<A2>::type P2;
typedef typename result_traits<A2>::type result_type;
storage2(typename base::P1 p1, P2 p2) : base(p1), a2_(p2) {}
using base::operator[];
inline result_type operator[](Argc<2> (*)()) const { return a2_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,a2_);}
A2 a2_;
};
template<typename A1, int I>
struct storage2<A1, Argc<I>(*)()> : storage2_base<storage2<A1, Argc<I>(*)()>, A1>
{
typedef storage2_base<storage2<A1, Argc<I>(*)()>, A1> base;
typedef typename param_traits<Argc<I>(*)()>::type P2;
storage2(typename base::P1 p1, P2) : base(p1){}
Argc<I> (*a2_)(void);
};
//-----------------------------兩個參數的storage-----------------------------end
//-----------------------------三個參數的storage-----------------------------start
template<typename D, typename A1, typename A2>
struct storage3_base : storage2<A1, A2>
{
typedef storage2<A1, A2> base;
using base::operator[];
storage3_base(typename base::P1 p1, typename base::P2 p2) : base(p1, p2) {}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_]);
}
};
template<typename A1, typename A2, typename A3>
struct storage3 : storage3_base<storage3<A1, A2, A3>, A1, A2>
{
typedef storage3_base<storage3<A1, A2, A3>, A1, A2> base;
typedef typename param_traits<A3>::type P3;
typedef typename result_traits<A3>::type result_type;
storage3(typename base::P1 p1, typename base::P2 p2, P3 p3) : base(p1, p2), a3_(p3) {}
using base::operator[];
inline result_type operator[](Argc<3> (*)()) const { return a3_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,a3_);}
A3 a3_;
};
template<typename A1, typename A2, int I>
struct storage3<A1, A2, Argc<I>(*)()> : storage3_base<storage3<A1, A2, Argc<I>(*)()>, A1, A2>
{
typedef storage3_base<storage3<A1, A2, Argc<I>(*)()>, A1, A2> base;
typedef typename param_traits<Argc<I>(*)()>::type P3;
storage3(typename base::P1 p1, typename base::P2 p2, P3) : base(p1, p2) {}
Argc<I> (*a3_)(void);
};
//-----------------------------三個參數的storage-----------------------------end
//-----------------------------四個參數的storage-----------------------------start
template<typename D, typename A1, typename A2, typename A3>
struct storage4_base : storage3<A1, A2, A3>
{
typedef storage3<A1, A2, A3> base;
using base::operator[];
storage4_base(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3) : base(p1, p2, p3){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_], s[d.a4_]);
}
};
template<typename A1, typename A2, typename A3, typename A4>
struct storage4 : storage4_base<storage4<A1, A2, A3, A4>, A1, A2, A3>
{
typedef storage4_base<storage4<A1, A2, A3, A4>, A1, A2, A3> base;
typedef typename param_traits<A4>::type P4;
typedef typename result_traits<A4>::type result_type;
using base::operator[];
storage4(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, P4 p4) : base(p1, p2, p3), a4_(p4) {}
inline result_type operator[](Argc<4>(*)()) const { return a4_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,this->a3_,a4_);}
A4 a4_;
};
template<typename A1, typename A2, typename A3, int I>
struct storage4<A1, A2, A3, Argc<I>(*)()> : storage4_base<storage4<A1, A2, A3, Argc<I>(*)()>, A1, A2, A3>
{
typedef storage4_base<storage4<A1, A2, A3, Argc<I>(*)()>, A1, A2, A3> base;
typedef typename param_traits<Argc<I>(*)()>::type P4;
storage4(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, P4) : base(p1, p2, p3) {}
Argc<I> (*a4_)(void);
};
//-----------------------------四個參數的storage-----------------------------end
//-----------------------------五個參數的storage-----------------------------start
template<typename D, typename A1, typename A2, typename A3, typename A4>
struct storage5_base : storage4<A1, A2, A3, A4>
{
typedef storage4<A1, A2, A3, A4> base;
using base::operator[];
storage5_base(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4) : base(p1, p2, p3, p4){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_], s[d.a4_], s[d.a5_]);
}
};
template<typename A1, typename A2, typename A3, typename A4, typename A5>
struct storage5 : storage5_base<storage5<A1, A2, A3, A4, A5>, A1, A2, A3, A4>
{
typedef storage5_base<storage5<A1, A2, A3, A4, A5>, A1, A2, A3, A4> base;
typedef typename param_traits<A5>::type P5;
typedef typename result_traits<A5>::type result_type;
using base::operator[];
storage5(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, P5 p5) : base(p1, p2, p3, p4), a5_(p5) {}
inline result_type operator[](Argc<5>(*)()) const { return a5_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,this->a3_,this->a4_,a5_);}
A5 a5_;
};
template<typename A1, typename A2, typename A3, typename A4, int I>
struct storage5<A1, A2, A3, A4, Argc<I>(*)()> : storage5_base<storage5<A1, A2, A3, A4, Argc<I>(*)()>, A1, A2, A3, A4>
{
typedef storage5_base<storage5<A1, A2, A3, A4, Argc<I>(*)()>, A1, A2, A3, A4> base;
typedef typename param_traits<Argc<I>(*)()>::type P5;
storage5(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, P5) : base(p1, p2, p3, p4) {}
Argc<I> (*a5_)(void);
};
//-----------------------------五個參數的storage-----------------------------end
//-----------------------------六個參數的storage-----------------------------start
template<typename D, typename A1, typename A2, typename A3, typename A4, typename A5>
struct storage6_base : storage5<A1, A2, A3, A4, A5>
{
typedef storage5<A1, A2, A3, A4, A5> base;
using base::operator[];
storage6_base(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5) : base(p1, p2, p3, p4, p5){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_], s[d.a4_], s[d.a5_], s[d.a6_]);
}
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
struct storage6 : storage6_base<storage6<A1, A2, A3, A4, A5, A6>, A1, A2, A3, A4, A5>
{
typedef storage6_base<storage6<A1, A2, A3, A4, A5, A6>, A1, A2, A3, A4, A5> base;
typedef typename param_traits<A6>::type P6;
typedef typename result_traits<A6>::type result_type;
using base::operator[];
storage6(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, P6 p6) : base(p1, p2, p3, p4, p5), a6_(p6) {}
inline result_type operator[](Argc<6>(*)()) const { return a6_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,this->a3_,this->a4_,this->a5_,a6_);}
A6 a6_;
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, int I>
struct storage6<A1, A2, A3, A4, A5, Argc<I>(*)()> : storage6_base<storage6<A1, A2, A3, A4, A5, Argc<I>(*)()>, A1, A2, A3, A4, A5>
{
typedef storage6_base<storage6<A1, A2, A3, A4, A5, Argc<I>(*)()>, A1, A2, A3, A4, A5> base;
typedef typename param_traits<Argc<I>(*)()>::type P6;
storage6(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, P6) : base(p1, p2, p3, p4, p5) {}
Argc<I> (*a6_)(void);
};
//-----------------------------六個參數的storage-----------------------------end
//-----------------------------七個參數的storage-----------------------------start
template<typename D, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
struct storage7_base : storage6<A1, A2, A3, A4, A5, A6>
{
typedef storage6<A1, A2, A3, A4, A5, A6> base;
using base::operator[];
storage7_base(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6) : base(p1, p2, p3, p4, p5, p6){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_], s[d.a4_], s[d.a5_], s[d.a6_], s[d.a7_]);
}
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
struct storage7 : storage7_base<storage7<A1, A2, A3, A4, A5, A6, A7>, A1, A2, A3, A4, A5, A6>
{
typedef storage7_base<storage7<A1, A2, A3, A4, A5, A6, A7>, A1, A2, A3, A4, A5, A6> base;
typedef typename param_traits<A7>::type P7;
typedef typename result_traits<A7>::type result_type;
using base::operator[];
storage7(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, P7 p7) : base(p1, p2, p3, p4, p5, p6), a7_(p7) {}
inline result_type operator[](Argc<7>(*)()) const { return a7_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,this->a3_,this->a4_,this->a5_,this->a6_,a7_);}
A7 a7_;
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, int I>
struct storage7<A1, A2, A3, A4, A5, A6, Argc<I>(*)()> : storage7_base<storage7<A1, A2, A3, A4, A5, A6, Argc<I>(*)()>, A1, A2, A3, A4, A5, A6>
{
typedef storage7_base<storage7<A1, A2, A3, A4, A5, A6, Argc<I>(*)()>, A1, A2, A3, A4, A5, A6> base;
typedef typename param_traits<Argc<I>(*)()>::type P7;
storage7(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, P7) : base(p1, p2, p3, p4, p5, p6) {}
Argc<I> (*a7_)(void);
};
//-----------------------------七個參數的storage-----------------------------end
//-----------------------------八個參數的storage-----------------------------start
template<typename D, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
struct storage8_base : storage7<A1, A2, A3, A4, A5, A6, A7>
{
typedef storage7<A1, A2, A3, A4, A5, A6, A7> base;
using base::operator[];
storage8_base(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, typename base::P7 p7) : base(p1, p2, p3, p4, p5, p6, p7){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_], s[d.a4_], s[d.a5_], s[d.a6_], s[d.a7_], s[d.a8_]);
}
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
struct storage8 : storage8_base<storage8<A1, A2, A3, A4, A5, A6, A7, A8>, A1, A2, A3, A4, A5, A6, A7>
{
typedef storage8_base<storage8<A1, A2, A3, A4, A5, A6, A7, A8>, A1, A2, A3, A4, A5, A6, A7> base;
typedef typename param_traits<A8>::type P8;
typedef typename result_traits<A8>::type result_type;
using base::operator[];
storage8(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, typename base::P7 p7, P8 p8) : base(p1, p2, p3, p4, p5, p6, p7), a8_(p8) {}
inline result_type operator[](Argc<8>(*)()) const { return a8_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,this->a3_,this->a4_,this->a5_,this->a6_,this->a7_,a8_);}
A8 a8_;
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, int I>
struct storage8<A1, A2, A3, A4, A5, A6, A7, Argc<I>(*)()> : storage8_base<storage8<A1, A2, A3, A4, A5, A6, A7, Argc<I>(*)()>, A1, A2, A3, A4, A5, A6, A7>
{
typedef storage8_base<storage8<A1, A2, A3, A4, A5, A6, A7, Argc<I>(*)()>, A1, A2, A3, A4, A5, A6, A7> base;
typedef typename param_traits<Argc<I>(*)()>::type P8;
storage8(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, typename base::P7 p7, P8) : base(p1, p2, p3, p4, p5, p6, p7) {}
Argc<I> (*a8_)(void);
};
//-----------------------------八個參數的storage-----------------------------end
//-----------------------------九個參數的storage-----------------------------start
template<typename D, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
struct storage9_base : storage8<A1, A2, A3, A4, A5, A6, A7, A8>
{
typedef storage8<A1, A2, A3, A4, A5, A6, A7, A8> base;
using base::operator[];
storage9_base(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, typename base::P7 p7, typename base::P8 p8) : base(p1, p2, p3, p4, p5, p6, p7, p8){}
template<typename R, typename F, typename S>
inline R operator()(type<R>, F &f, const S &s) const
{
const D &d = static_cast<const D&>(*this);
return d[f](s[d.a1_], s[d.a2_], s[d.a3_], s[d.a4_], s[d.a5_], s[d.a6_], s[d.a7_], s[d.a8_], s[d.a9_]);
}
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8, typename A9>
struct storage9 : storage9_base<storage9<A1, A2, A3, A4, A5, A6, A7, A8, A9>, A1, A2, A3, A4, A5, A6, A7, A8>
{
typedef storage9_base<storage9<A1, A2, A3, A4, A5, A6, A7, A8, A9>, A1, A2, A3, A4, A5, A6, A7, A8> base;
typedef typename param_traits<A9>::type P9;
typedef typename result_traits<A9>::type result_type;
using base::operator[];
storage9(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, typename base::P7 p7, typename base::P8 p8, P9 p9) : base(p1, p2, p3, p4, p5, p6, p7, p8), a9_(p9) {}
inline result_type operator[](Argc<9>(*)()) const { return a9_; }
template<typename R, typename F>
inline R Do(type<R>, F &f) const {return f(this->a1_,this->a2_,this->a3_,this->a4_,this->a5_,this->a6_,this->a7_,this->a8_,a9_);}
A9 a9_;
};
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8, int I>
struct storage9<A1, A2, A3, A4, A5, A6, A7, A8, Argc<I>(*)()> : storage9_base<storage9<A1, A2, A3, A4, A5, A6, A7, A8, Argc<I>(*)()>, A1, A2, A3, A4, A5, A6, A7, A8>
{
typedef storage9_base<storage9<A1, A2, A3, A4, A5, A6, A7, A8, Argc<I>(*)()>, A1, A2, A3, A4, A5, A6, A7, A8> base;
typedef typename param_traits<Argc<I>(*)()>::type P9;
storage9(typename base::P1 p1, typename base::P2 p2, typename base::P3 p3, typename base::P4 p4, typename base::P5 p5, typename base::P6 p6, typename base::P7 p7, typename base::P8 p8, P9) : base(p1, p2, p3, p4, p5, p6, p7, p8) {}
Argc<I> (*a9_)(void);
};
//-----------------------------九個參數的storage-----------------------------end
//-------------------------------------storage系列-------------------------------------end
namespace _bind{
//-------------------------------------_bind::f_*()系列-------------------------------------start
// "f_*()"是用來儲存成員函式的
// 當運行"()"運算子時會將填入的第一個參數視為物件指標
// 用"f_*()"來取代原本的一般函式指標就令Bind()變成可以支援成員函式了
// f_*()系列的共同基底
template<typename R, typename F>
struct f_b
{
typedef typename result_traits<R>::type result_type;
explicit f_b(const F &f) : f_(f) {}
F f_; //成員函式的位址
};
// 沒有參數的成員函式< 函式回傳值 , 類別type , 成員函式的原型 >
template<typename R, typename C, typename F>
struct f_0 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_0(const F &f) : base(f) {}
// 填入的物件指標type不符合時就用這個執行，之所以不符合也許是因為該物件指標是屬於基底類別的吧
template<typename U>
inline typename base::result_type operator()(U &u) const
{
return (get_pointer(u)->*base::f_)();
}
// 填入的物件指標type符合時就用這個執行
inline typename base::result_type operator()(C &c) const
{
return (c.*base::f_)();
}
};
// 一個參數的成員函式
template<typename R, typename C, typename F>
struct f_1 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_1(const F &f) : base(f) {}
template<typename U, typename A1>
inline typename base::result_type operator()(U &u, A1 a1) const
{
return (get_pointer(u)->*base::f_)(a1);
}
template<typename A1>
inline typename base::result_type operator()(C &c, A1 a1) const
{
return (c.*base::f_)(a1);
}
};
// 兩個參數的成員函式
template<typename R, typename C, typename F>
struct f_2 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_2(const F &f) : base(f) {}
template<typename U, typename A1, typename A2>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2) const
{
return (get_pointer(u)->*base::f_)(a1, a2);
}
template<typename A1, typename A2>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2) const
{
return (c.*base::f_)(a1, a2);
}
};
// 三個參數的成員函式
template<typename R, typename C, typename F>
struct f_3 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_3(const F &f) : base(f) {}
template<typename U, typename A1, typename A2, typename A3>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2, A3 a3) const
{
return (get_pointer(u)->*base::f_)(a1, a2, a3);
}
template<typename A1, typename A2, typename A3>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2, A3 a3) const
{
return (c.*base::f_)(a1, a2, a3);
}
};
// 四個參數的成員函式
template<typename R, typename C, typename F>
struct f_4 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_4(const F &f) : base(f) {}
template<typename U, typename A1, typename A2, typename A3, typename A4>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2, A3 a3, A4 a4) const
{
return (get_pointer(u)->*base::f_)(a1, a2, a3, a4);
}
template<typename A1, typename A2, typename A3, typename A4>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2, A3 a3, A4 a4) const
{
return (c.*base::f_)(a1, a2, a3, a4);
}
};
// 五個參數的成員函式
template<typename R, typename C, typename F>
struct f_5 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_5(const F &f) : base(f) {}
template<typename U, typename A1, typename A2, typename A3, typename A4, typename A5>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5) const
{
return (get_pointer(u)->*base::f_)(a1, a2, a3, a4, a5);
}
template<typename A1, typename A2, typename A3, typename A4, typename A5>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5) const
{
return (c.*base::f_)(a1, a2, a3, a4, a5);
}
};
// 六個參數的成員函式
template<typename R, typename C, typename F>
struct f_6 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_6(const F &f) : base(f) {}
template<typename U, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6) const
{
return (get_pointer(u)->*base::f_)(a1, a2, a3, a4, a5, a6);
}
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6) const
{
return (c.*base::f_)(a1, a2, a3, a4, a5, a6);
}
};
// 七個參數的成員函式
template<typename R, typename C, typename F>
struct f_7 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_7(const F &f) : base(f) {}
template<typename U, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7) const
{
return (get_pointer(u)->*base::f_)(a1, a2, a3, a4, a5, a6, a7);
}
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7) const
{
return (c.*base::f_)(a1, a2, a3, a4, a5, a6, a7);
}
};
// 八個參數的成員函式
template<typename R, typename C, typename F>
struct f_8 : f_b<R, F>
{
typedef f_b<R, F> base;
explicit f_8(const F &f) : base(f) {}
template<typename U, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
inline typename base::result_type operator()(U &u, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7, A8 a8) const
{
return (get_pointer(u)->*base::f_)(a1, a2, a3, a4, a5, a6, a7, a8);
}
template<typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
inline typename base::result_type operator()(C &c, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7, A8 a8) const
{
return (c.*base::f_)(a1, a2, a3, a4, a5, a6, a7, a8);
}
};
//-------------------------------------_bind::f_*()系列-------------------------------------end
}//namespace _bind
/// 這個是bind()的回傳值
template<typename R, typename F, typename S> struct bind_t
{
public:
// result_traits對R做了解析並確保能得到真正的回傳值型態
typedef typename result_traits<R>::type result_type;
bind_t(const F &f, const S &s) : f_(f), s_(s) {}
//----------------------eval----------------------start
// eval使得外部可以只輸入storage物件來呼叫執行function
// 方便外部設計出簡潔的介面
template<typename A>
inline result_type eval(A &a)
{
return s_(type<result_type>(), f_, a);
}
template<typename A>
inline result_type eval(A &a) const
{
return s_(type<result_type>(), f_, a);
}
//----------------------eval----------------------end
//-------------------輸入零個參數時的情況-------------------start
inline result_type operator()()
{
typedef storage0 ll;
return s_(type<result_type>(), f_, ll());
}
inline result_type operator()() const
{
typedef storage0 ll;
return s_(type<result_type>(), f_, ll());
}
//-------------------輸入零個參數時的情況-------------------end
//-------------------輸入一個參數時的情況-------------------start
// 為了支持const而多寫了很多版本(2^2個)
template<typename P1>
inline result_type operator()(P1 &p1)
{
typedef storage1<P1&> ll;
return l_(type<result_type>(), f_, ll(p1));
}
template<typename P1>
inline result_type operator()(P1 &p1) const
{
typedef storage1<P1&> ll;
return l_(type<result_type>(), f_, ll(p1));
}
template<typename P1>
inline result_type operator()(const P1 &p1)
{
typedef storage1<const P1&> ll;
return l_(type<result_type>(), f_, ll(p1));
}
template<typename P1>
inline result_type operator()(const P1 &p1) const//--------這個足以應付大多數情況了
{
typedef storage1<const P1&> ll;
return l_(type<result_type>(), f_, ll(p1));
}
//-------------------輸入一個參數時的情況-------------------end
//--------以下省略只寫最通用的版本
// 輸入兩個參數時
template<typename P1, typename P2>
inline result_type operator()(const P1 &p1, const P2 &p2) const
{
typedef storage2<const P1&, const P2&> ll;
return s_(type<result_type>(), f_, ll(p1, p2));
}
// 輸入三個參數時
template<typename P1, typename P2, typename P3>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3) const
{
typedef storage3<const P1&, const P2&, const P3&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3));
}
// 輸入四個參數時
template<typename P1, typename P2, typename P3, typename P4>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3, const P4 &p4) const
{
typedef storage4<const P1&, const P2&, const P3&, const P4&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3, p4));
}
// 輸入五個參數時
template<typename P1, typename P2, typename P3, typename P4, typename P5>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3, const P4 &p4, const P5 &p5) const
{
typedef storage5<const P1&, const P2&, const P3&, const P4&, const P5&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3, p4, p5));
}
// 輸入六個參數時
template<typename P1, typename P2, typename P3, typename P4, typename P5, typename P6>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3, const P4 &p4, const P5 &p5, const P6 &p6) const
{
typedef storage6<const P1&, const P2&, const P3&, const P4&, const P5&, const P6&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3, p4, p5, p6));
}
// 輸入七個參數時
template<typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3, const P4 &p4, const P5 &p5, const P6 &p6, const P7 &p7) const
{
typedef storage7<const P1&, const P2&, const P3&, const P4&, const P5&, const P6&, const P7&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3, p4, p5, p6, p7));
}
// 輸入八個參數時
template<typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7, typename P8>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3, const P4 &p4, const P5 &p5, const P6 &p6, const P7 &p7, const P8 &p8) const
{
typedef storage8<const P1&, const P2&, const P3&, const P4&, const P5&, const P6&, const P7&, const P8&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3, p4, p5, p6, p7, p8));
}
// 輸入九個參數時
template<typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7, typename P8, typename P9>
inline result_type operator()(const P1 &p1, const P2 &p2, const P3 &p3, const P4 &p4, const P5 &p5, const P6 &p6, const P7 &p7, const P8 &p8, const P9 &p9) const
{
typedef storage9<const P1&, const P2&, const P3&, const P4&, const P5&, const P6&, const P7&, const P8&, const P9&> ll;
return s_(type<result_type>(), f_, ll(p1, p2, p3, p4, p5, p6, p7, p8, p9));
}
private:
F f_;
S s_;
};
//----------------------------處理一般函式----------------------------start
template<typename R>
bind_t<R, R (*)(), storage0> bind(R (*f)())
{
typedef R (*F)();
typedef storage0 S;
return bind_t<R, F, S>(f, S());
};
template<typename R, typename P1, typename A1>
bind_t<R, R (*)(P1), storage1<A1> > bind(R (*f)(P1), A1 a1)
{
typedef R (*F)(P1);
typedef storage1<A1> S;
return bind_t<R, F, S>(f, S(a1));
}
template<typename R, typename P1, typename P2, typename A1, typename A2>
bind_t<R, R (*)(P1, P2), storage2<A1, A2> > bind(R (*f)(P1, P2), A1 a1, A2 a2)
{
typedef R (*F)(P1, P2);
typedef storage2<A1, A2> S;
return bind_t<R, F, S>(f, S(a1, a2));
}
template<typename R, typename P1, typename P2, typename P3, typename A1, typename A2, typename A3>
bind_t<R, R (*)(P1, P2, P3), storage3<A1, A2, A3> > bind(R (*f)(P1, P2, P3), A1 a1, A2 a2, A3 a3)
{
typedef R (*F)(P1, P2, P3);
typedef storage3<A1, A2, A3> S;
return bind_t<R, F, S>(f, S(a1, a2, a3));
}
template<typename R, typename P1, typename P2, typename P3, typename P4, typename A1, typename A2, typename A3, typename A4>
bind_t<R, R (*)(P1, P2, P3, P4), storage4<A1, A2, A3, A4> > bind(R (*f)(P1, P2, P3, P4), A1 a1, A2 a2, A3 a3, A4 a4)
{
typedef R (*F)(P1, P2, P3, P4);
typedef storage4<A1, A2, A3, A4> S;
return bind_t<R, F, S>(f, S(a1, a2, a3, a4));
}
template<typename R, typename P1, typename P2, typename P3, typename P4, typename P5, typename A1, typename A2, typename A3, typename A4, typename A5>
bind_t<R, R (*)(P1, P2, P3, P4, P5), storage5<A1, A2, A3, A4, A5> > bind(R (*f)(P1, P2, P3, P4, P5), A1 a1, A2 a2, A3 a3, A4 a4, A5 a5)
{
typedef R (*F)(P1, P2, P3, P4, P5);
typedef storage5<A1, A2, A3, A4, A5> S;
return bind_t<R, F, S>(f, S(a1, a2, a3, a4, a5));
}
template<typename R, typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
bind_t<R, R (*)(P1, P2, P3, P4, P5, P6), storage6<A1, A2, A3, A4, A5, A6> > bind(R (*f)(P1, P2, P3, P4, P5, P6), A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6)
{
typedef R (*F)(P1, P2, P3, P4, P5, P6);
typedef storage6<A1, A2, A3, A4, A5, A6> S;
return bind_t<R, F, S>(f, S(a1, a2, a3, a4, a5, a6));
}
template<typename R, typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
bind_t<R, R (*)(P1, P2, P3, P4, P5, P6, P7), storage7<A1, A2, A3, A4, A5, A6, A7> > bind(R (*f)(P1, P2, P3, P4, P5, P6, P7), A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7)
{
typedef R (*F)(P1, P2, P3, P4, P5, P6, P7);
typedef storage7<A1, A2, A3, A4, A5, A6, A7> S;
return bind_t<R, F, S>(f, S(a1, a2, a3, a4, a5, a6, a7));
}
template<typename R, typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7, typename P8, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
bind_t<R, R (*)(P1, P2, P3, P4, P5, P6, P7, P8), storage8<A1, A2, A3, A4, A5, A6, A7, A8> > bind(R (*f)(P1, P2, P3, P4, P5, P6, P7, P8), A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7, A8 a8)
{
typedef R (*F)(P1, P2, P3, P4, P5, P6, P7, P8);
typedef storage8<A1, A2, A3, A4, A5, A6, A7, A8> S;
return bind_t<R, F, S>(f, S(a1, a2, a3, a4, a5, a6, a7, a8));
}
template<typename R, typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7, typename P8, typename P9, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8, typename A9>
bind_t<R, R (*)(P1, P2, P3, P4, P5, P6, P7, P8, P9), storage9<A1, A2, A3, A4, A5, A6, A7, A8, A9> > bind(R (*f)(P1, P2, P3, P4, P5, P6, P7, P8, P9), A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6, A7 a7, A8 a8, A9 a9)
{
typedef R (*F)(P1, P2, P3, P4, P5, P6, P7, P8, P9);
typedef storage9<A1, A2, A3, A4, A5, A6, A7, A8, A9> S;
return bind_t<R, F, S>(f, S(a1, a2, a3, a4, a5, a6, a7, a8, a9));
}
//----------------------------處理一般函式----------------------------end