Creating a class object on run time in C++
Author
Hi,
Is it possible to use RTTI to create a class object at runtime - like for example
do something like
Class obj = something("CLASSNAME").getClass(); ?
I know I can do it by using a function which returns the class based on the string but does a thing already exist like something like typeid(name).getClass(); ??
Thanks
[edit] I hadn't read your entire post. I don't think that what you are thinking of is possible in C++ (I assume this is C++).[/edit]
You can do it using something called the factory pattern. Loki has an implementation.
jfl.
You can do it using something called the factory pattern. Loki has an implementation.
jfl.
I dont' believe there is a built-in C++ function for that. You'll have to resort to a factory of some flavor.
Quote:Original post by CRACK123No, you can't. In C++ classes are not objects that you could return from a function.
I know I can do it by using a function which returns the class based on the string
If you're using the .NET framework, you can do this using code emission within the reflection namespace.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconemittingdynamicassemblies.asp
However, I'm not sure if you can do this in managed C++.
Also, look up "template metaprogramming."
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconemittingdynamicassemblies.asp
However, I'm not sure if you can do this in managed C++.
Also, look up "template metaprogramming."
I have a book called Game Programming Gems 5 I think which explains how you can create and destroy objects by referring to their names
Author
Hi
Can you explain how they do it - I know one way you could do it is by doing the following(inherit a base class everytime ) and use a function which goes something like the following
Can you explain how they do it - I know one way you could do it is by doing the following(inherit a base class everytime ) and use a function which goes something like the following
Obj *GetClass(const std::string &className){ if(className.compare(someName)) { return new ClassName(); } return NULL;}Quote:Original post by CRACK123That function returns an instance (=object), not the class itself. Thus it should be named differently.
Hi
Can you explain how they do it - I know one way you could do it is by doing the following(inherit a base class everytime ) and use a function which goes something like the following
*** Source Snippet Removed ***
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