Macro, Polymorphism

[D. Susman]

Hi,

I wonder if there is a way to introduce polymorphic parameters to a
macro. What I'm trying to say is: Say, I have a macro X taking
argument of type A*. Let there be a B class deriving from class A. Can
I pass a B to the macro as a pointer to A?

(One might say, "use templates anyway". I am applying a memory pool
mechanism and wrapping new and delete with macros New and Delete
correspondingly)

Thanks.

 

[Ian Collins]

Hi,

I wonder if there is a way to introduce polymorphic parameters to a
macro. What I'm trying to say is: Say, I have a macro X taking
argument of type A*. Let there be a B class deriving from class A. Can
I pass a B to the macro as a pointer to A?

Macros lack any form of type system, they just perform substitutions.

(One might say, "use templates anyway". I am applying a memory pool
mechanism and wrapping new and delete with macros New and Delete
correspondingly)

OK then, why not provide your own new and delete operators?

 

[Fabian Lenzen]

OK then, why not provide your own new and delete operators?

Yeah, simply define "operator new(size_t)" and "operator delete()"