in reply to Re: Rename a Moo constructor from "new" to "run"
in thread Rename a Moo constructor from "new" to "run"

You don't need the SUPER::.

sub run { shift->new(@_) }

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Re^3: Rename a Moo constructor from "new" to "run"
by karlgoethebier (Abbot) on Mar 30, 2019 at 20:25 UTC

    Thanks. But are you sure? Just because i still can't test it. I vaguely remember that it only worked with the SUPER::. Best regards, Karl

    «The Crux of the Biscuit is the Apostrophe»

    perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help

      use v5.16; package Foo { use Moo; has blah => (is => 'ro', required => 1); sub run { shift->new(@_) } } say Foo->run(blah => 42)->blah;

      Doing SUPER::new will probably work in this case, though if you call it repeatedly, you won't benefit from some of the optimizations Moo does. (Moo doesn't actually built a Foo::new sub straight away, but when Moo::new gets called, it will notice that Foo::new is missing, build an optimized constructor, install it, and goto it.)

      In cases where you weren't using a class building toolkit like Moo, and Foo::new was a hand-written constructor, then you definitely wouldn't want to call SUPER::new because you'd be bypassing the class's hand-written constructor (in favour of the superclass's constructor) which might be doing important stuff.

        Pretty cool. Best regards, Karl

        «The Crux of the Biscuit is the Apostrophe»

        perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help

      SUPER::new() calls new() of parent-class, if any.

        So does $self Class->new if no sub new was declared in the Class.

        map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

        Sure. That's why i did it in the example mentioned: Inheriting the constructor, renaming it and changing it's behavior. A plugin...

        «The Crux of the Biscuit is the Apostrophe»

        perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help