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1 | package MooseX::UndefTolerant::Constructor; |
2 | use Moose::Role; |
3 | |
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4 | if ( $Moose::VERSION < 1.9900 ) { |
5 | around('_generate_slot_initializer', sub { |
6 | my $orig = shift; |
7 | my $self = shift; |
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8 | |
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9 | # note the key in the params may not match the attr name. |
10 | my $key_name = $self->_attributes->[$_[0]]->init_arg; |
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11 | |
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12 | # insert a line of code at the start of the initializer, |
13 | # clearing the param if it's undefined. |
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14 | |
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15 | if (defined $key_name) { |
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16 | my $tolerant_code = |
17 | qq# delete \$params->{'$key_name'} unless # . |
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18 | qq# exists \$params->{'$key_name'} && defined \$params->{'$key_name'};\n#; |
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19 | |
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20 | return $tolerant_code . $self->$orig(@_); |
21 | } |
22 | else { |
23 | return $self->$orig(@_); |
24 | } |
25 | }); |
26 | } |
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27 | |
28 | no Moose::Role; |
29 | |
30 | 1; |