Re: assert(false) vs abort()

From:
"Jim Langston" <tazmaster@rocketmail.com>
Newsgroups:
comp.lang.c++.moderated
Date:
Wed, 15 Aug 2007 14:49:15 CST
Message-ID:
<WvFwi.7$bN3.2@newsfe04.lga>
"Ulrich Eckhardt" <eckhardt@satorlaser.com> wrote in message
news:e13bp4-91n.ln1@satorlaser.homedns.org...

Greetings!

I have a piece of code like this:

 int frobnicate(short foo) {
   switch(foo) {
     case bar: return 0;
     case baz: return 1;
     default: assert(false);
   }
 }

Now, when I compile this, the compiler complains that not every path
returns
a value. Thinking about it, it even makes sense because the 'false' is
only
evaluated at runtime so the compiler can't know that this will terminate
the program.

Okay, I thought, then I'll replace this with a simple abort() call.
However,
there are two things that annoy me there:
1. The call isn't removed with NDEBUG. True, the impact on executable size
and speed is probably around zero, but somehow I'd like to avoid a
function
call there that won't (/me crosses fingers) be called anyway because that
would be a bug and only makes it harder for the optimiser to do its work.
2. I don't get the same diagnostic support as assert() gets, like having
the
file/line/function dumped to stderr and a debugger waiting for me there to
inspect the situation.

How do you deal with this situation?


default:
    assert(false);
    return -1;

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