Dear Uri,
> [...] subs can come into existance any time and be
> handled by AUTOLOAD and such. so there is no easy compile time way to
> check that at the moment. [...]
A sub can, of course, be defined at run-time and then used. But this
is not the point.
It is the same principle as for any other stricture. The user is asking
perl to flag some *legal* usage as being unacceptable for her/his purpose.
For the user who does not want dynamically defined routines, it should
be trivial for the compiler to honour a suitable pragma (say, "use
strict sub_definitions") and die if it sees that there are some
subroutine invocations without any compile-time definitions.
An invocation before a declaration is legal Perl, but gets flagged
under "use strict subs". An invocation without a definition should be
equally easy to flag (although, of course, perl would have to wait
until the end of compilation to do so).
peace, || Udayachal: a newspaper edited by slum children:
--{kr.pA} || http://tinyurl.com/57jaf
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