1LaTeXML::Common::ObjectU(s3e)r Contributed Perl DocumentaLtaiToenXML::Common::Object(3)
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NAME

6       "LaTeXML::Common::Object" - abstract base class for most LaTeXML
7       objects.
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DESCRIPTION

10       "LaTeXML::Common::Object" serves as an abstract base class for all
11       other objects (both the data objects and control objects).  It provides
12       for common methods for stringification and comparison operations to
13       simplify coding and to beautify error reporting.
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15   Generic functions
16       "$string = Stringify($object);"
17           Returns a string identifying $object, for debugging.  Works on any
18           values and objects, but invokes the stringify method on blessed
19           objects.  More informative than the default perl conversion to a
20           string.
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22       "$string = ToString($object);"
23           Converts $object to string attempting, when possible, to generate
24           straight text without TeX markup.  This is most useful for
25           converting Tokens or Boxes to document content or attribute values,
26           or values to be used for pathnames, keywords, etc.   Generally,
27           however, it is not possible to convert Whatsits generated by
28           Constructors into clean strings, without TeX markup.  Works on any
29           values and objects, but invokes the toString method on blessed
30           objects.
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32       "$boolean = Equals($x,$y);"
33           Compares the two objects for equality.  Works on any values and
34           objects, but invokes the equals method on blessed objects, which
35           does a deep comparison of the two objects.
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37       "$tokens = Revert($object);"
38           Returns a Tokens list containing the TeX that would create $object.
39           Note that this is not necessarily the original TeX code; expansions
40           or other substitutions may have taken place.
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42   Methods
43       "$string = $object->stringify;"
44           Returns a readable representation of $object, useful for debugging.
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46       "$string = $object->toString;"
47           Returns the string content of $object; most useful for extracting a
48           clean, usable, Unicode string from tokens or boxes that might
49           representing a filename or such.  To the extent possible, this
50           should provide a string that can be used as XML content, or
51           attribute values, or for filenames or whatever. However, control
52           sequences defined as Constructors may leave TeX code in the value.
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54       "$boole = $object->equals($other);"
55           Returns whether $object and $other are equal.  Should perform a
56           deep comparison, but the default implementation just compares for
57           object identity.
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59       "$boole = $object->isaToken;"
60           Returns whether $object is an LaTeXML::Core::Token.
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62       "$boole = $object->isaBox;"
63           Returns whether $object is an LaTeXML::Core::Box.
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65       "$boole = $object->isaDefinition;"
66           Returns whether $object is an LaTeXML::Core::Definition.
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68       "$digested = $object->beDigested;"
69           Does whatever is needed to digest the object, and return the
70           digested representation.  Tokens would be digested into boxes; Some
71           objects, such as numbers can just return themselves.
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73       "$object->beAbsorbed($document);"
74           Do whatever is needed to absorb the $object into the $document,
75           typically by invoking appropriate methods on the $document.
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AUTHOR

78       Bruce Miller <bruce.miller@nist.gov>
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81       Public domain software, produced as part of work done by the United
82       States Government & not subject to copyright in the US.
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86perl v5.36.0                      2022-07-20        LaTeXML::Common::Object(3)
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