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How do I dynamically redefine imported subroutines?

That's actually quite easy, but say is not being imported; it's not even a subroutine! say is an operator, and use feature 'say'; merely controls whether the compiler recognises it or not. (It always recognises CORE::say, though.)

Some operators can be overridden from within Perl by overriding GLOBAL::CORE::op, and some can't. The following checks whether say can be overridden this way:

>perl -E"say defined(prototype('CORE::say')) ?'yes':'no'" no

Its funky syntax doesn't permit it.

say say LIST say FILEHANDLE LIST say BLOCK LIST

It could be done using a CallChecker, but that involves dropping to C/XS.


In reply to Re: Redefining Imported Subs: of scope and no by ikegami
in thread Redefining Imported Subs: of scope and no by temporal

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