Re: C/C++ programmer giving Ada95 a chance -- writing an emulator.

["James S. Rogers" <jimmaureenrogers@worldnet.att.net>]

Ed Falis wrote in message ...
>I guess what I don't understand about this conversation is why noone has
>proposed the use of tagged types instead of manual procedure dispatching.


Although the original author of this thread used the term dispatching, his
description of what he wants does not really want dispatching.

He wants to execute a procedure associated with a particular opcode value,
not based upon a separate type. He also did not want to use any form of
case statement to determine the procedure to execute. This rules out the
use of a discriminated record.

The approach of a manually constructed dispatching table is valid in either
C++ or Ada. The reason it is used in C++ is that he is not really using
virtual functions there either. The C++ vtable will not work for him.

Show me how you will design a hierarchy of tagged types differentiated only
by  values of discrete type. I have not yet seen that trick.

Jim Rogers