TypeList.h

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/*
* This file is part of Project SkyFire https://www.projectskyfire.org.
* See LICENSE.md file for Copyright information
*/
 
#ifndef SKYFIRE_TYPELIST_H
#define SKYFIRE_TYPELIST_H
 
/*
  @struct TypeList
  TypeList is the most simple but yet the most powerfull class of all.  It holds
  at compile time the different type of objects in a linked list.
 */
 
class TypeNull;
 
template<typename HEAD, typename TAIL>
struct TypeList
{
    typedef HEAD Head;
    typedef TAIL Tail;
};
 
// enough for now.. can be expand at any point in time as needed
#define TYPELIST_1(T1)                  TypeList<T1, TypeNull>
#define TYPELIST_2(T1, T2)              TypeList<T1, TYPELIST_1(T2) >
#define TYPELIST_3(T1, T2, T3)          TypeList<T1, TYPELIST_2(T2, T3) >
#define TYPELIST_4(T1, T2, T3, T4)      TypeList<T1, TYPELIST_3(T2, T3, T4) >
#define TYPELIST_5(T1, T2, T3, T4, T5)  TypeList<T1, TYPELIST_4(T2, T3, T4, T5) >
#endif