1Mo::build(3)          User Contributed Perl Documentation         Mo::build(3)
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Name

6       Mo::build - Adds the build feature to Mo
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Synopsis

9           use Mo qw'build';
10           has name => ( is => 'rw' );
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12           sub BUILD {
13               my $self = shift;
14               ...
15           }
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Description

18       Adds the "BUILD" feature to Mo when imported.
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20       If a sub called "BUILD" exists on the package, it will be executed on
21       $self during instantiation.
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23       Any non-lazy "default" and "builder" attributes, as well as any value
24       passed to "new" will already be set when "BUILD" is called.
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26           package ABCD;
27           use Mo qw'build builder default';
28           use feature 'say';
29
30           has a => (default => 1234, lazy => 0);
31           has b => (builder => '_b', lazy => 0);
32           has c => (is => 'rw');
33           has d => (is => 'rw');
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35           sub _b { 'blue' }
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37           sub BUILD {
38               my ($self) = @_;
39               say $self->{a};
40               say $self->{b};
41               say $self->{c};
42               say 'undef' unless defined $self->{d};
43           }
44
45           ABCD->new(c => 'days') # => 1234
46                                  #    blue
47                                  #    days
48                                  #    undef
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52perl v5.36.0                      2023-01-20                      Mo::build(3)