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Postings from May 2008
Aristotle Pagaltzis <pagaltzis <at> gmx.de> writes:
>> BEGIN: {
>> # This code gets executed at run time, because the colon
>> # after BEGIN means it's just a plain old label
>> }
I think that a warning is a good idea - I can't imagine any false positives, and
you already have evidence that people tend to make this mistake.
Indeed, why just a warning? Surely using a language keyword as a label should
be disallowed altogether. At the moment the behaviour is a bit bizarre:
print: { say 'hello' }
goto print;
fails with 'Can't find label 1', as if this were a computed goto using the
return value of evaluating print, but on the other hand if you try to make such
a computed goto using your own function:
sub f { return 1 }
goto f;
you get 'Can't find label f', showing that it's treated as a literal word and
not evaluated.
IMHO, this semantic muddle is best resolved by forbidding builtin keywords as
labels.
--
Ed Avis <eda@waniasset.com>
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