P
PerlFAQ Server
This is an excerpt from the latest version perlfaq7.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .
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7.21: How do I redefine a builtin function, operator, or method?
Why do you want to do that?
If you want to override a predefined function, such as open(), then
you'll have to import the new definition from a different module. See
"Overriding Built-in Functions" in perlsub. There's also an example in
"Class::Template" in perltoot.
If you want to overload a Perl operator, such as "+" or "**", then
you'll want to use the "use overload" pragma, documented in overload.
If you're talking about obscuring method calls in parent classes, see
"Overridden Methods" in perltoot.
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The perlfaq-workers, a group of volunteers, maintain the perlfaq. They
are not necessarily experts in every domain where Perl might show up,
so please include as much information as possible and relevant in any
corrections. The perlfaq-workers also don't have access to every
operating system or platform, so please include relevant details for
corrections to examples that do not work on particular platforms.
Working code is greatly appreciated.
If you'd like to help maintain the perlfaq, see the details in
perlfaq.pod.
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .
--------------------------------------------------------------------
7.21: How do I redefine a builtin function, operator, or method?
Why do you want to do that?
If you want to override a predefined function, such as open(), then
you'll have to import the new definition from a different module. See
"Overriding Built-in Functions" in perlsub. There's also an example in
"Class::Template" in perltoot.
If you want to overload a Perl operator, such as "+" or "**", then
you'll want to use the "use overload" pragma, documented in overload.
If you're talking about obscuring method calls in parent classes, see
"Overridden Methods" in perltoot.
--------------------------------------------------------------------
The perlfaq-workers, a group of volunteers, maintain the perlfaq. They
are not necessarily experts in every domain where Perl might show up,
so please include as much information as possible and relevant in any
corrections. The perlfaq-workers also don't have access to every
operating system or platform, so please include relevant details for
corrections to examples that do not work on particular platforms.
Working code is greatly appreciated.
If you'd like to help maintain the perlfaq, see the details in
perlfaq.pod.