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Postings from November 1999
Apologies for sending this to what I suspect is an inappropriate
address, but would you mind forwarding it for me please?
(And what's the <suggestion-box@perl.org> address?)
My suggestion: I'd like to be able to turn on a warning that lets me
know if my program contains function calls to functions that I haven't
defined. So for example:
my $a1 = foo1();
if ($a1 == 3) {
$a1 = foo2();
}
print "a1 is $a1\n";
sub foo1 {
return 2;
}
should report "foo2() not defined" when given the appropriate
options. (This is a lot like the sort of reporting you get from the
linker when you use Boring Old-Fashioned Languages.)
I appreciate that there is an overhead here, so you'd not want this to
be the default behaviour. But I think it's trivial to implement
(right? Just walk the parse-tree before starting the run). It would
help to ensure that programs that work today don't stop working
tomorrow when someone feeds them input that wanders off down a
different code-path.
Thanks for listening,
Mike Taylor
TECC Ltd.
mike@tecc.co.uk
Tel. +44 181 880 4040
(Oh, and thanks for Perl -- loving it!)
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