Maybe something like this  (it doesn't exactly rename the package, but rather just copies its symbol table hash): 

#!/usr/bin/perl

package Foo;
sub bar { print "bar() called.\n" }

package main;

BEGIN { %{*NewFoo::} = %{*Foo::} }

NewFoo::bar();  # calls Foo::bar();

[download]

or without BEGIN, in which case you need to postpone the compilation of NewFoo::bar() until runtime using eval: 

...

%{*NewFoo::} = %{*Foo::};

eval q|NewFoo::bar()|;  # calls Foo::bar();

[download]

In reply to Re: dynamically renaming a package? by almut
in thread dynamically renaming a package? by perl5ever

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