1Pod::Abstract::Filter(3U)ser Contributed Perl DocumentatiPoond::Abstract::Filter(3)
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NAME

6       Pod::Abstract::Filter - Generic Pod-in to Pod-out filter.
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DESCRIPTION

9       This is a superclass for filter modules using Pod::Abstract. Subclasses
10       should override the "filter" sub. Pod::Abstract::Filter classes in the
11       Pod::Abstract::Filter namespace will be used by the "paf" utility.
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13       To create a filter, you need to implement:
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15       filter
16           Takes a Pod::Abstract::Node tree, and returns either another tree,
17           or a string. If a string is returned, it will be re-parsed to be
18           input to any following filter, or output directly if it is the last
19           filter in the list.
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21           It is recommended your filter method produce a Node tree if you are
22           able to, as this will improve interoperability with other
23           "Pod::Abstract" based software.
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25       require_params
26           If you want positional arguments following your filter in the style
27           of:
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29            paf find [thing] Pod::Abstract
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31           then override require_params to list the named arguments that are
32           to be accepted after the filter name.
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METHODS

35   new
36       Create a new filter with the specified arguments.
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38   require_params
39       Override to return a list of parameters that must be provided. This
40       will be accepted in order on the command line, unless they are first
41       set using the "-flag=xxx" notation.
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43   param
44       Get the named param. Read only.
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46   filter
47       Stub method. Does nothing, just returns the original tree.
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49   run
50       Run the filter. If $arg is a string, it will be parsed first.
51       Otherwise, the Abstract tree will be used. Returns either a string or
52       an abstract tree (which may be the original tree, modified).
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AUTHOR

55       Ben Lilburne <bnej@mac.com>
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58       Copyright (C) 2009 Ben Lilburne
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60       This program is free software; you can redistribute it and/or modify it
61       under the same terms as Perl itself.
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65perl v5.34.0                      2021-07-22          Pod::Abstract::Filter(3)
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