Darren New wrote:
People who like exceptions like them for the same reason that people who
don't like them dislike them: they're non-local control structures, and
therefore impossible to ignore.
Pretty much.
However, generally the people who whinge about non-local control wind up
creating deep conditionals checking bunches of error codes. And what do
they put all over that code:
// Do the initial thing
if (foocondition) {
// Do cleanup
return FALSE;
}
if (barcondition) {
// Do cleanup
return FALSE;
}
<finally do the real work>
Which are all effectively non-local control gotos. Just like exceptions.
At this point, I have been using both long enough that I am pretty
convinced that exceptions are interchangeable with return codes.
IMO, exceptions should be a language feature that abstracts away the
writing of that return code checking code.
I also like the way things like Lisp/Scheme can use
exceptions/conditinals to actually allow you to restart and resume the
computation after adjusting the environment.
-a
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