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1 | package MooseX::StrictConstructor::Trait::Class; |
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2 | |
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3 | use Moose::Role; |
4 | |
5 | use namespace::autoclean; |
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6 | |
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7 | use B (); |
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8 | |
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9 | around new_object => sub { |
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10 | my $orig = shift; |
11 | my $self = shift; |
12 | my $params = @_ == 1 ? $_[0] : {@_}; |
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13 | my $instance = $self->$orig(@_); |
14 | |
15 | my %attrs = ( |
16 | __INSTANCE__ => 1, |
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17 | ( |
18 | map { $_ => 1 } |
19 | grep {defined} |
20 | map { $_->init_arg() } $self->get_all_attributes() |
21 | ) |
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22 | ); |
23 | |
24 | my @bad = sort grep { !$attrs{$_} } keys %$params; |
25 | |
26 | if (@bad) { |
27 | $self->throw_error( |
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28 | "Found unknown attribute(s) init_arg passed to the constructor: @bad" |
29 | ); |
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30 | } |
31 | |
32 | return $instance; |
33 | }; |
34 | |
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35 | around '_inline_BUILDALL' => sub { |
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36 | my $orig = shift; |
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37 | my $self = shift; |
38 | |
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39 | my @source = $self->$orig(); |
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40 | |
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41 | my @attrs = ( |
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42 | '__INSTANCE__ => 1,', |
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43 | map { B::perlstring($_) . ' => 1,' } |
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44 | grep {defined} |
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45 | map { $_->init_arg() } $self->get_all_attributes() |
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46 | ); |
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47 | |
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48 | return ( |
49 | @source, |
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50 | 'my %attrs = (' . ( join ' ', @attrs ) . ');', |
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51 | 'my @bad = sort grep { !$attrs{$_} } keys %{ $params };', |
52 | 'if (@bad) {', |
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53 | 'Moose->throw_error("Found unknown attribute(s) passed to the constructor: @bad");', |
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54 | '}', |
55 | ); |
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56 | } if $Moose::VERSION >= 1.9900; |
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57 | |
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58 | 1; |
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59 | |
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60 | # ABSTRACT: A role to make immutable constructors strict |
61 | |
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62 | __END__ |
63 | |
64 | =pod |
65 | |
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66 | =head1 DESCRIPTION |
67 | |
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68 | This role simply wraps C<_inline_BUILDALL()> (from |
69 | C<Moose::Meta::Class>) so that immutable classes have a |
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70 | strict constructor. |
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71 | |
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72 | =cut |