Primitive.h

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#pragma once 

#include "Instruction.h"

template<typename T=void, typename... args> 
struct Primitive {
    
    Op op;
    void* f;
    
    Primitive(const Primitive<T,args...>& other) = delete; // probably not the best idea to copy these
    Primitive(const Primitive<T,args...>&& other) = delete; // probably not the best idea to copy these
    
    template<typename VirtualMachineState_t>
    Primitive(Op o, typename VirtualMachineState_t::FT* _f) : f((void*)_f), op(o) {
        assert(f != nullptr);
    }   
    
    template<typename VirtualMachineState_t>
    Primitive(Op o, void(*_f)(VirtualMachineState_t*,int)) : op(o) {
        f = (void*)(new typename VirtualMachineState_t::FT(_f)); // make a copy
        assert(f != nullptr);
    }
    
    // this is helpful for other Builtins to call even though it is not used in VMS running
    template<typename VirtualMachineState_t>
    void call(VirtualMachineState_t* vms, int arg) {
        auto myf = reinterpret_cast<typename VirtualMachineState_t::FT*>(f);
        (*myf)(vms, arg);
    }
    
    Instruction makeInstruction(int arg=0) {
        return Instruction(f,arg);
    }
};