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Writing an IDL application using a C++ data model. [message #56689]

Sun, 11 November 2007 20:14

Robbie
Messages: 165
Registered: February 2006

Senior Member

Writing an IDL application using a C++ data model.

I was wondering if anyone has written an IDL application where most of
the data and meta data is stored and handled in C++?
Until now, I have taken the philosophy that I should call as little C+
+ as possible. In fact, all of my C++ is totally experimental is not
in production yet.

There are several reasons why I would prefer a C++ data model:
1) C++ is strongly typed, so the data model would be well defined.
2) C++ is much faster and flexible for organising meta data. IDL
structures are slow and tend towards disorganisation.
3) I could call external C++ code directly from the data model itself.

Here is an example class with a single property

class my_object: public idl_object {
public:
float height;
my_object() {
height = 0;
}
float getHeight() {return(height);};
void setHeight(float h) {height = h;};
};

The class could be registered in C++ as being accessible from IDL. I
would use C++ templates to assist in resolving type errors at compile
time.

registerClass<my_object>("MY_OBJECT");
registerProperty<float,
my_object>("HEIGHT",&my_object::getHeight,&my_object::setHeight);

The object could be instantiated and accessed from IDL like this:

obj = cpp_obj_new("MY_OBJECT")
obj -> GetProperty, HEIGHT=height
help, height

I have an existing implementation of casting variables from IDL to
boost::multi_array so the interface should support most IDL types.

Robbie

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[Message index]

		Writing an IDL application using a C++ data model. By: Robbie on Sun, 11 November 2007 20:14
		Re: Writing an IDL application using a C++ data model. By: David Fanning on Mon, 12 November 2007 12:09
		Re: Writing an IDL application using a C++ data model. By: Robbie on Mon, 12 November 2007 11:52
		Re: Writing an IDL application using a C++ data model. By: JD Smith on Mon, 12 November 2007 09:00

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