Name

Mo::build - Adds the build feature to Mo

Synopsis

            

              
              
use Mo qw'build';
has name => ( is => 'rw' );
sub BUILD {
    my $self = shift;
    ...
}
            
          

Description

Adds the BUILD feature to Mo when imported.

If a sub called BUILD exists on the package, it will be executed on $self during instantiation.

Any non-lazy default and builder attributes, as well as any value passed to new will already be set when BUILD is called.

            

              
              
package ABCD;
use Mo qw'build builder default';
use feature 'say';
has a => (default => 1234, lazy => 0);
has b => (builder => '_b', lazy => 0);
has c => (is => 'rw');
has d => (is => 'rw');
sub _b { 'blue' }
sub BUILD {
    my ($self) = @_;
    say $self->{a};
    say $self->{b};
    say $self->{c};
    say 'undef' unless defined $self->{d};
}
ABCD->new(c => 'days') # => 1234
                       #    blue
                       #    days
                       #    undef