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3b46bd49 |
1 | package Mouse::Util::TypeConstraints; |
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2 | use strict; |
3 | use warnings; |
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4 | |
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5 | use Carp (); |
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6 | use Scalar::Util qw/blessed looks_like_number openhandle/; |
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7 | |
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8 | my %SUBTYPE; |
9 | my %COERCE; |
10 | my %COERCE_KEYS; |
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11 | |
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12 | #find_type_constraint register_type_constraint |
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13 | sub import { |
14 | my $class = shift; |
15 | my %args = @_; |
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16 | my $caller = $args{callee} || caller(0); |
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17 | |
18 | no strict 'refs'; |
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19 | *{"$caller\::as"} = \&_as; |
20 | *{"$caller\::where"} = \&_where; |
21 | *{"$caller\::message"} = \&_message; |
22 | *{"$caller\::from"} = \&_from; |
23 | *{"$caller\::via"} = \&_via; |
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24 | *{"$caller\::type"} = \&_type; |
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25 | *{"$caller\::subtype"} = \&_subtype; |
26 | *{"$caller\::coerce"} = \&_coerce; |
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27 | *{"$caller\::class_type"} = \&_class_type; |
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28 | *{"$caller\::role_type"} = \&_role_type; |
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29 | } |
30 | |
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31 | |
32 | sub _as ($) { |
33 | as => $_[0] |
34 | } |
35 | sub _where (&) { |
36 | where => $_[0] |
37 | } |
38 | sub _message ($) { |
39 | message => $_[0] |
40 | } |
41 | |
42 | sub _from { @_ } |
43 | sub _via (&) { |
44 | $_[0] |
45 | } |
46 | |
381f326a |
47 | my $optimized_constraints; |
48 | my $optimized_constraints_base; |
49 | { |
50 | no warnings 'uninitialized'; |
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51 | %SUBTYPE = ( |
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52 | Any => sub { 1 }, |
53 | Item => sub { 1 }, |
54 | Bool => sub { |
55 | !defined($_) || $_ eq "" || "$_" eq '1' || "$_" eq '0' |
56 | }, |
57 | Undef => sub { !defined($_) }, |
58 | Defined => sub { defined($_) }, |
59 | Value => sub { defined($_) && !ref($_) }, |
60 | Num => sub { !ref($_) && looks_like_number($_) }, |
61 | Int => sub { defined($_) && !ref($_) && /^-?[0-9]+$/ }, |
62 | Str => sub { defined($_) && !ref($_) }, |
63 | ClassName => sub { Mouse::is_class_loaded($_) }, |
64 | Ref => sub { ref($_) }, |
65 | |
66 | ScalarRef => sub { ref($_) eq 'SCALAR' }, |
67 | ArrayRef => sub { ref($_) eq 'ARRAY' }, |
68 | HashRef => sub { ref($_) eq 'HASH' }, |
69 | CodeRef => sub { ref($_) eq 'CODE' }, |
70 | RegexpRef => sub { ref($_) eq 'Regexp' }, |
71 | GlobRef => sub { ref($_) eq 'GLOB' }, |
72 | |
73 | FileHandle => sub { |
74 | ref($_) eq 'GLOB' |
75 | && openhandle($_) |
76 | or |
77 | blessed($_) |
78 | && $_->isa("IO::Handle") |
79 | }, |
80 | |
81 | Object => sub { blessed($_) && blessed($_) ne 'Regexp' }, |
8a7f2a8a |
82 | ); |
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83 | |
8a7f2a8a |
84 | sub optimized_constraints { \%SUBTYPE } |
85 | my @SUBTYPE_KEYS = keys %SUBTYPE; |
d3982c7e |
86 | sub list_all_builtin_type_constraints { @SUBTYPE_KEYS } |
381f326a |
87 | } |
d3982c7e |
88 | |
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89 | sub _type { |
90 | my $pkg = caller(0); |
91 | my($name, %conf) = @_; |
92 | if (my $type = $SUBTYPE{$name}) { |
93 | Carp::croak "The type constraint '$name' has already been created, cannot be created again in $pkg"; |
94 | }; |
95 | my $stuff = $conf{where} || do { $SUBTYPE{delete $conf{as} || 'Any' } }; |
96 | $SUBTYPE{$name} = $stuff; |
97 | } |
98 | |
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99 | sub _subtype { |
100 | my $pkg = caller(0); |
61a02a3a |
101 | my($name, %conf) = @_; |
8a7f2a8a |
102 | if (my $type = $SUBTYPE{$name}) { |
61a02a3a |
103 | Carp::croak "The type constraint '$name' has already been created, cannot be created again in $pkg"; |
104 | }; |
2f665925 |
105 | my $stuff = $conf{where} || do { $SUBTYPE{delete $conf{as} || 'Any' } }; |
106 | my $as = $conf{as} || ''; |
1fbefea5 |
107 | if ($as = $SUBTYPE{$as}) { |
108 | $SUBTYPE{$name} = sub { $as->($_) && $stuff->($_) }; |
109 | } else { |
110 | $SUBTYPE{$name} = $stuff; |
111 | } |
4188b837 |
112 | } |
113 | |
114 | sub _coerce { |
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115 | my($name, %conf) = @_; |
116 | |
117 | Carp::croak "Cannot find type '$name', perhaps you forgot to load it." |
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118 | unless $SUBTYPE{$name}; |
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119 | |
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120 | unless ($COERCE{$name}) { |
121 | $COERCE{$name} = {}; |
122 | $COERCE_KEYS{$name} = []; |
123 | } |
61a02a3a |
124 | while (my($type, $code) = each %conf) { |
125 | Carp::croak "A coercion action already exists for '$type'" |
8a7f2a8a |
126 | if $COERCE{$name}->{$type}; |
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127 | |
128 | Carp::croak "Could not find the type constraint ($type) to coerce from" |
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129 | unless $SUBTYPE{$type}; |
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130 | |
8a7f2a8a |
131 | push @{ $COERCE_KEYS{$name} }, $type; |
132 | $COERCE{$name}->{$type} = $code; |
61a02a3a |
133 | } |
4188b837 |
134 | } |
135 | |
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136 | sub _class_type { |
137 | my $pkg = caller(0); |
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138 | my($name, $conf) = @_; |
139 | my $class = $conf->{class}; |
2f6fade8 |
140 | Mouse::load_class($class); |
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141 | _subtype( |
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142 | $name => where => sub { $_->isa($class) } |
61a02a3a |
143 | ); |
ecc6e3b1 |
144 | } |
145 | |
47f36c05 |
146 | sub _role_type { |
47f36c05 |
147 | my($name, $conf) = @_; |
148 | my $role = $conf->{role}; |
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149 | _subtype( |
150 | $name => where => sub { |
151 | return unless defined $_ && ref($_) && $_->isa('Mouse::Object'); |
152 | $_->meta->does_role($role); |
153 | } |
154 | ); |
47f36c05 |
155 | } |
156 | |
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157 | sub typecast_constraints { |
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158 | my($class, $pkg, $type_constraint, $types, $value) = @_; |
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159 | |
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160 | local $_; |
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161 | for my $type (ref($types) eq 'ARRAY' ? @{ $types } : ( $types )) { |
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162 | next unless $COERCE{$type}; |
8a7f2a8a |
163 | for my $coerce_type (@{ $COERCE_KEYS{$type}}) { |
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164 | $_ = $value; |
165 | next unless $SUBTYPE{$coerce_type}->(); |
166 | $_ = $value; |
167 | $_ = $COERCE{$type}->{$coerce_type}->(); |
168 | return $_ if $type_constraint->(); |
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169 | } |
170 | } |
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171 | return $value; |
172 | } |
173 | |
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174 | 1; |
175 | |
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176 | __END__ |
177 | |
178 | =head1 NAME |
179 | |
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180 | Mouse::Util::TypeConstraints - simple type constraints |
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181 | |
182 | =head1 METHODS |
183 | |
184 | =head2 optimized_constraints -> HashRef[CODE] |
185 | |
186 | Returns the simple type constraints that Mouse understands. |
187 | |
188 | =cut |
189 | |
190 | |