From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 1108a1,b87849933931bc93
X-Google-Attributes: gid1108a1,public
X-Google-Thread: fac41,b87849933931bc93
X-Google-Attributes: gidfac41,public
X-Google-Thread: 114809,b87849933931bc93
X-Google-Attributes: gid114809,public
X-Google-Thread: 103376,b87849933931bc93
X-Google-Attributes: gid103376,public
From: jhd@herold.franken.de (Joachim Durchholz)
Subject: Re: Static vs. Dynamic typing again (was Re: OO, C++,
 and something mu
Date: 1997/02/08
Message-ID: <6QU$zv$k3RB@herold.franken.de>#1/1
X-Deja-AN: 217449871
distribution: world
references: <JSA.97Jan16141937@alexandria> <32E764D0.23D9@calfp.com>
newsgroups: comp.lang.eiffel,comp.lang.ada,comp.lang.smalltalk,comp.object
Date: 1997-02-08T00:00:00+00:00
List-Id: <comp.lang.ada>


Mark wrote:

>   This is my experience with C++ anyway.  Please
>   comment if casting in Eiffel provides the same
>   opportunity for run-time errors.

Casting in Eiffel is possible (via the assignment attempt - you assign,  
and if the run-time check doesn't work, the assigned-to variable will hold  
"void" as a value).
There is no core dump or exception involved, except if you use the  
assigned-to variable afterwards without checking wether the assignment  
attempt worked.
Anyway Eiffel exceptions are somewhat more disciplined than C++ exceptions  
(though they are quite different than "message not understood").

>   The consequences of such runtime errors are
>   less severe in Smalltalk because it will not
>   core dump (mostly).

Same holds for Eiffel programs :)

Regards,
-Joachim

--
Joachim Durchholz, Hans-Herold-Str. 25, D-91074 Herzogenaurach, GERMANY