C++ void** parse
Author
Hi all, i want to use a function like this:
function(void** thing);
The goal is to pass any object i want:
Ai* obj;
obj = new obj[10];
function((VOID**)&obj);
At this step all seems right, but in the function itself:
function(void** thing)
{
thing[0].method();
}
Here i dont know what to do, the compiler says:
expression must have class type
How i need to change this to work, i dont find how.
I hope you can help me , Thanks!
In C++ we avoid the void type. That is because it goes against the principle of type safety.
By casting a pointer of type MyObj* to void*, you lose all type information. The compiler is telling you that objects of type void do not define a function called "method()".
You want to use generics to solve this problem:
By casting a pointer of type MyObj* to void*, you lose all type information. The compiler is telling you that objects of type void do not define a function called "method()".
You want to use generics to solve this problem:
template<typename T>void foo(T t){ t.method();}
Not necessarily; depending on the situation, virtual functions may be more suited to the task. But fpsgamer is right: void* is not to be used in C++ unless you know what you're doing. _Camus_, what precisely are you trying to accomplish?
Author
Thanks, the main problem is this:
class one
{
... //stuff
function(two obj);
};
class two
{
...//stuff
other_function(one obj);
};
if i include one i need to include the other, but in that case, both are
included xD and i cannot do that, thats why i try using void** to pass
whatever i want, but it seems more difficult than i thought.
The problem its that class one its the physx, and the class two its the
Ai so, i need to use physx to my Ai, but i need to calcule things of Ai
on physx, there its a way to deal ?
Thanks again
class one
{
... //stuff
function(two obj);
};
class two
{
...//stuff
other_function(one obj);
};
if i include one i need to include the other, but in that case, both are
included xD and i cannot do that, thats why i try using void** to pass
whatever i want, but it seems more difficult than i thought.
The problem its that class one its the physx, and the class two its the
Ai so, i need to use physx to my Ai, but i need to calcule things of Ai
on physx, there its a way to deal ?
Thanks again
Forward declarations:
class two;class one{... function(two &obj);};class two{... other_function(one &obj);}
For future reference, this is why you should always explain what you are trying to achieve, instead of just what you are doing.
This topic is closed to new replies.
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