1Object::Pad::MOP::FieldU(s3e)r Contributed Perl DocumentaOtbijoenct::Pad::MOP::Field(3)
2
3
4

NAME

6       "Object::Pad::MOP::Field" - meta-object representation of data field of
7       a "Object::Pad" class
8

DESCRIPTION

10       Instances of this class represent a data field of a class implemented
11       by Object::Pad. Accessors provide information about the field. The
12       special "value" method allows access to the value of the given field on
13       instances of its class, letting the meta-object be used as a proxy to
14       it.
15
16       This API should be considered experimental even within the overall
17       context in which "Object::Pad" is expermental.
18

METHODS

20   name
21          $name = $metafield->name
22
23       Returns the name of the field, as a plain string including the leading
24       sigil character.
25
26   sigil
27          $sigil = $metafield->sigil
28
29       Since version 0.56.
30
31       Returns the first character of the field name, giving just its leading
32       sigil.
33
34   class
35          $metaclass = $metafield->class
36
37       Returns the Object::Pad::MOP::Class instance representing the class of
38       which this field is a member.
39
40   value
41          $current = $metafield->value( $instance )
42          @current = $metafield->value( $instance )
43          %current = $metafield->value( $instance )
44
45       An accessor method which returns the current value of the field from an
46       object instance.
47
48          $metafield->value( $instance ) = $new
49
50       On scalar fields, this method can also act as an lvalue mutator
51       allowing a new value to be set.
52
53   has_attribute
54          $exists = $metafield->has_attribute( $name )
55
56       Since version 0.57.
57
58       Returns a boolean indicating whether the named attribute has been
59       attached to the field. The attribute name should not include the
60       leading colon (":") character.
61
62   get_attribute_value
63          $value = $metafield->get_attribute_value( $name )
64
65       Since version 0.57.
66
67       Returns the stored value of an attached attribute, if one exists. If
68       the attribute has not been attached then an exception is thrown.
69
70       Note that most core-defined attributes will either store no data at
71       all, or a method name string. This accessor method is provided largely
72       for the benefit of obtaining data defined by third-party attributes,
73       which may more clearly define how that data is generated and used.
74

AUTHOR

76       Paul Evans <leonerd@leonerd.org.uk>
77
78
79
80perl v5.34.0                      2022-03-02        Object::Pad::MOP::Field(3)
Impressum