but using the global namespace for an inner function is somehow dangerous. What if you call an external function within outer, that tries to call a completely different function also called inner()?

First, there's no such thing as the global namespace. The code uses the current namespace.

Secondly, are you seriously complaining that a script can't have two functions with the same name? Or did you mean to test something like 

use strict;
use warnings;

$\ = "\n";

sub outer2 {
   local *inner = sub { print "inner_of_outer2" };
   inner();
}

sub outer1 {
   local *inner = sub { print "inner_of_outer1" };
   inner();
   outer2();
}

outer1();

[download]

Unfortunately, that gives a warning. 

inner_of_outer1
Subroutine main::inner redefined at script.pl line 7.
inner_of_outer2

[download]

In reply to Re^5: sub fuction inside sub functioin? by ikegami
in thread sub fuction inside sub functioin? by deewanagan

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