Re: Dynamic polymorphism vs. Static polymorphism

"Axter" <>
31 May 2006 12:02:22 -0700
Cy Edmunds wrote:

"Luke Meyers" <> wrote in message

Cy Edmunds wrote:

"Krivenok Dmitry" <> wrote in message
All elements of a container must be of the same type. If it is a pointer
smart pointer to a common base class we have dynamic polymorphism. Static
polymorphism can be accomplished using a flag to determine the actual

struct clumsy
int flag;
union (...} other_stuff;

Uh, I'm pretty sure this is not what most people mean by "static
polymorphism." How did you come to associate the term with this ugly

The "static"/"dynamic" distinction wrt polymorphism, as with e.g.
typing, refers to compile-time vs. run-time. With static polymorphism,
the actual type of the object is known at compile-time. The usual
(only?) mechanism in C++ for this is templates.


The original poster asked about heterogeneous containers. How would you do
that with templates?

Check out the following example code:

Each of the above files have different levels of complexity for
creating a heterogeneous container.
The basic idea is to create a wrapper class that acts like an interface
to the different types.
Although the types don't have to derive from the same object, they do
have to have a common method or common data to access.

David Maisonave

Author of Axter's policy based smart pointers
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