Devel::Sub::Which - Name information about sub calls à la can in the UNIVERSAL manpage and <which(1)>.
use Devel::Sub::Which qw/:universal/;
# elsewhere
$obj->which("foo"); # returns the name of the sub that
# will implement the "foo" method
Devel::Sub::Which::which($code_ref); # returns the name of the ref
I don't like the perl debugger. I'd rather print debug statements as I go along, mostly saying "i'm going to do so and so", so I know what to look for when stuff breaks.
Often I find myself faced with polymorphism crap flying into my face. With multiple inheritence, delegations, runtime generated classes, method calls on non predeterminate values, and so forth, it sometimes makes sense to do:
my $method = < blah blah blah >;
debug("i'm going to call $method on $obj. FYI, it's going to be "
. $obj->which($method));
$obj->$method()
In order to figure out exactly which $method was responsible for your error, or whatever. This helps the above debugging style by providing more deterministic reporting.
This method determines which subroutine reference will be executed for METHOD, using the UNIVERSAL::can manpage (or any overriding implementation),
The first form has the same effect as OBJ->which(METHOD), and the second form
just delegates to ref_to_name.
Return a string with the name of CODEREF. Errors generated by the B manpage are not caught.
Nothing is exported by default. These parameters will have an effect:
This causes which to become a method in the UNIVERSAL manpage, so that you can call
it on any object.
Exports the said functions.
Yitzchak Scott-Thoennes provided the know-how needed to get the name of a sub reference.
Yuval Kogman <nothingmuch@woobling.org>
Copyright (c) 2004 Yuval Kogman. All rights reserved
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
the DB manpage, the perldebug manpage, the UNIVERSAL manpage, the B manpage