Re: Undefined behaviour [was Re: The D Programming Language]

From:
"Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail@erdani.org>
Newsgroups:
comp.lang.c++.moderated
Date:
11 Dec 2006 08:51:34 -0500
Message-ID:
<JA36yJ.BBI@beaver.cs.washington.edu>
PeteK wrote:

Andrei Alexandrescu (See Website For Email) wrote:

Your claim is wrong. Debugging a program in which language invariants
are still in vigor cannot be as hard as debugging a program with no
invariants.


Cannot?????

Dangling pointer vs. zombie:- if the program crashes you've found your
dangling pointer. Easy peasy!

To track down the zombie you'll have to manually insert checks in your
code.

And just because something's defined doesn't mean it's not a big source
of program errors. For example:

if( a = b )

has probably caused far more errors than dangling pointers ever will.


Alright, alright! I exaggerated. But my point is simply that life is
easier if you have something to hang on. Just like in life: if you only
have a friend you could really trust... :o)

Andrei

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