I'd be willing to bet this is an XY Problem... could you explain why you need this, preferably with an SSCCE?

If you want the code that $func points to to call a different run, you can do the following (locally redefine &Spin::Command::spin::run), although this is kinda hacky too <update> because it just changes the call to run, it doesn't affect anything else in $func, like package variables or other function calls. </update> The "real" solution would be to modify $func at its origin.

use warnings;
use strict;

{
    package Spin::Command::spin;
    sub run {
        print "Bar<<".shift.">>\n";
    }
    sub func {
        run("Foo:".shift);
    }
}

my $func = \&Spin::Command::spin::func;

use B::Deparse;
my $deparse = B::Deparse->new;
print "<<",$deparse->coderef2text($func),">>\n";

sub other_run {
    print "Quz[[".shift."]]\n";
}

my $func_other_run = sub {
    no warnings 'redefine';
    local *Spin::Command::spin::run = \&main::other_run;
    $func->(@_);
};

$func->("Hello");            # prints "Bar<<Foo:Hello>>"
$func_other_run->("World");  # prints "Quz[[Foo:World]]"

[download]

Update 2: Of course you can also just clobber the original func:

{
    no warnings 'redefine';
    *Spin::Command::spin::func = $func_other_run;
}

[download]

WebPerl Live Demo

In reply to Re: Possible to change package of code reference? by haukex
in thread Possible to change package of code reference? by nysus

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