the text gets into the object as shown by Data::Dumper.

Yes it does ... doesn't mean there is an accessor created (accessors are just "methods" aka "subroutines")

without has bar 

use Data::Dump qw/ dd /;
dd( my $f = Foo->new(qw/ bar 1 /) );
$f->bar;
{package Foo; use Moo; }
__END__
bless({ bar => 1 }, "Foo")
Can't locate object method "bar" via package "Foo" at - line 3.

[download]

you can cheat and use $f->{bar} ... this is cheating / breaking encapsulation / peeking inside object / not using official api / so if sometime in the future you internally rename bar attribute to barps, anyone using ->{bar} would have to update program, anyone using the documented api ->bar wouldn't (because you'd update that too) ... yeah seems convoluted example but thats how they work :)

with has bar Without BEGIN block there is no bar accessor (accessor is subroutine ... all $obj->whatever is subroutines) 

use Data::Dump qw/ dd /;
dd( my $f = Foo->new(qw/ bar 1 /) );
$f->bar;
{package Foo; use Moo; has( qw/ bar is rw / ); }
__END__
bless({ bar => 1 }, "Foo")
Can't locate object method "bar" via package "Foo" at - line 3.

[download]

with has bar and With BEGIN block no death :) 

use Data::Dump qw/ dd /;
dd( my $f = Foo->new(qw/ bar 1 /) );
$f->bar;
BEGIN{package Foo; use Moo; has( qw/ bar is rw / ); }
__END__
bless({ bar => 1 }, "Foo")

[download]

with has bar and Without begin block no death (moved to line 1)

{package Foo; use Moo; has( qw/ bar is rw / ); }
use Data::Dump qw/ dd /;
dd( my $f = Foo->new(qw/ bar 1 /) );
$f->bar;
__END__
bless({ bar => 1 }, "Foo")

[download]

got that? See also perlobj, A Method is Simply a Subroutine, Attributes

In reply to Re^3: Moo error message not understood (BEGIN block missing) by Anonymous Monk
in thread Moo error message not understood by davies

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