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Since the perlsub POD mentions the AUTOLOAD subroutine in the same sentence as "BEGIN", "CHECK", "INIT", "END", "CLONE" and "DESTROY", I assume it shares some of the same characteristics as the others, the important one in this case being that the sub keyword is implied. When fed your code, B::Deparse prints the following. Notice how the sub keyword is inserted for the BEGIN subs, as well as the AUTOLOAD sub:

package Foo; use warnings; use strict 'refs'; our $AUTOLOAD; sub main::BEGIN { package main; no strict 'refs'; require strict; do { 'strict'->import }; } sub main::BEGIN { package main; require warnings; do { 'warnings'->import }; } sub new { return bless({}, shift @_); } sub do_something { print 'did something'; } sub AUTOLOAD { print "message from Foo: undefined method ($AUTOLOAD) called"; } package main; my $instance = 'Foo'->new; $instance->do_something; $instance->do_notimplemented;

In reply to Re: Why does this work? AUTOLOAD sans sub declaration by converter
in thread Why does this work? AUTOLOAD sans sub declaration by braswell

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