まずベースとなるもの
struct nil {}; template <class Car, class Cdr> struct cons { typedef Car car; typedef Cdr cdr; };
いまの型リストはこれ
#define TYPELIST1(T0) cons<T0, nil> #define TYPELIST2(T0, T1) cons<T0, TYPELIST1(T1) > #define TYPELIST3(T0, T1, T2) cons<T0, TYPELIST2(T1, T2) > #define TYPELIST4(T0, T1, T2, T3) cons<T0, TYPELIST3(T1, T2, T3) > #define TYPELIST5(T0, T1, T2, T3, T4) cons<T0, TYPELIST4(T1, T2, T3, T4) > #define TYPELIST6(T0, T1, T2, T3, T4, T5) cons<T0, TYPELIST5(T1, T2, T3, T4, T5) > #define TYPELIST7(T0, T1, T2, T3, T4, T5, T6) cons<T0, TYPELIST6(T1, T2, T3, T4, T5, T6) > #define TYPELIST8(T0, T1, T2, T3, T4, T5, T6, T7) cons<T0, TYPELIST7(T1, T2, T3, T4, T5, T6, T7) > #define TYPELIST9(T0, T1, T2, T3, T4, T5, T6, T7, T8) cons<T0, TYPELIST8(T1, T2, T3, T4, T5, T6, T7, T8) > #define TYPELIST10(T0,T1, T2, T3, T4, T5, T6, T7, T8, T9) cons<T0, TYPELIST9(T1, T2, T3, T4, T5, T6, T7, T8, T9) >
C++0xではたぶんこんな感じ
template <class T0> using type_list1 = cons<T0, nil>; template <class T0, class T1> using type_list2 = cons<T0, type_list1<T1>>; template <class T0, class T1, class T2> using type_list3 = cons<T0, type_list2<T1, T2>>; template <class T0, class T1, class T2, class T3> using type_list4 = cons<T0, type_list3<T1, T2, T3>>; template <class T0, class T1, class T2, class T3, class T4> using type_list5 = cons<T0, type_list4<T1, T2, T3, T4>>; template <class T0, class T1, class T2, class T3, class T4, class T5> using type_list6 = cons<T0, type_list5<T1, T2, T3, T4, T5>>; template <class T0, class T1, class T2, class T3, class T4, class T5, class T6> using type_list7 = cons<T0, type_list6<T1, T2, T3, T4, T5, T6>>; template <class T0, class T1, class T2, class T3, class T4, class T5, class T6, class T7> using type_list8 = cons<T0, type_list7<T1, T2, T3, T4, T5, T6, T7>>; template <class T0, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8> using type_list9 = cons<T0, type_list8<T1, T2, T3, T4, T5, T6, T7, T8>>; template <class T0, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9> using type_list10 = cons<T0, type_list9<T1, T2, T3, T4, T5, T6, T7, T8, T9>>;
・・・たぶんね。
