I must be missing something. What's wrong with doing 

$chain = sub { $_[0]->method1(@args1)->method2(@args2)->method3(@args3
+) };

[download]
? It doesn't suffer for the limitations you decribe. The only limitation as far as I can see is that it creates another scope if you use my() et al in the arguments, which is a bad idea anyway and is easily worked around.

Anyway... About your post:

If $method is a string with double colons, or a code reference, or a glob, then $object->$method is equivalent to &$method($object).

It's not true if it's a string with double colons or a glob. It searches the inheritance tree starting at the package specified in the string. The glob stringifies and for some reason '*Bar::foo' is also accepted. 

#!/usr/bin/perl -wl

use strict;
no strict 'refs';

{ package Foo; sub foo { 1 } }
{ package Bar; use base 'Foo'; }

my $object = 'Bar'; # just the class name
my $method = 'Bar::foo';

print "$object->$method ",  eval { $object->$method  } ? 'ok' : 'not o
+k'; 
print "&$method($object) ", eval { &$method($object) } ? 'ok' : 'not o
+k';

__END__
Bar->Bar::foo ok
&Bar::foo(Bar) not ok

[download]
Btw, I think you're playing with fire when you do 
for (@$chain) { ... }

[download]
since $chain @$chain may change during the loop. I'd feel much safer if you made a local copy of the array.

ihb

See perltoc if you don't know which perldoc to read!

In reply to Re: Method chain object with easy syntax by ihb
in thread Method chain object with easy syntax by ambrus

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