1Config::Grammar::DynamiUcs(e3r)Contributed Perl DocumentCaotnifoing::Grammar::Dynamic(3)
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NAME

6       Config::Grammar::Dynamic - A grammar-based, user-friendly config parser
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DESCRIPTION

9       Config::Grammar::Dynamic is like Config::Grammar but with some
10       additional features useful for building configuration grammars that are
11       dynamic, i.e.  where the syntax changes according to configuration
12       entries in the same file.
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14       The following keys can be additionally specified in the grammar when
15       using this module:
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17   Special Section Keys
18       _dyn        A subroutine reference (function pointer) that will be
19                   called when a new section of this syntax is encountered.
20                   The subroutine will get three arguments: the syntax of the
21                   section name (string or regexp), the actual name
22                   encountered (this will be the same as the first argument
23                   for non-regexp sections) and a reference to the grammar
24                   tree of the section.  This subroutine can then modify the
25                   grammar tree dynamically.
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27       _dyndoc     A hash reference that lists interesting names for the
28                   section that should be documented. The keys of the hash are
29                   the names and the values in the hash are strings that can
30                   contain an explanation for the name. The _dyn() subroutine
31                   is then called for each of these names and the differences
32                   of the resulting grammar and the original one are
33                   documented. This module can currently document differences
34                   in the _vars list, listing new variables and removed ones,
35                   and differences in the _sections list, listing the new and
36                   removed sections.
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38       _recursive  Array containing the list of those sub-sections that are
39                   recursive, ie.  that can contain a new sub-section with the
40                   same syntax as themselves.
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42                   The same effect can be accomplished with circular
43                   references in the grammar tree or a suitable _dyn section
44                   subroutine (see below}, so this facility is included just
45                   for convenience.
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47   Special Variable Keys
48       _dyn        A subroutine reference (function pointer) that will be
49                   called when the variable is assigned some value in the
50                   config file. The subroutine will get three arguments: the
51                   name of the variable, the value assigned and a reference to
52                   the grammar tree of this section.  This subroutine can then
53                   modify the grammar tree dynamically.
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55                   Note that no _dyn() call is made for default and inherited
56                   values of the variable.
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58       _dyndoc     A hash reference that lists interesting values for the
59                   variable that should be documented. The keys of the hash
60                   are the values and the values in the hash are strings that
61                   can contain an explanation for the value. The _dyn()
62                   subroutine is then called for each of these values and the
63                   differences of the resulting grammar and the original one
64                   are documented. This module can currently document
65                   differences in the _vars list, listing new variables and
66                   removed ones, and differences in the _sections list,
67                   listing the new and removed sections.
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70       Copyright (c) 2000-2005 by ETH Zurich. All rights reserved.  Copyright
71       (c) 2007 by David Schweikert. All rights reserved.
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LICENSE

74       This program is free software; you can redistribute it and/or modify it
75       under the same terms as Perl itself.
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AUTHORS

78       David Schweikert, Tobias Oetiker, Niko Tyni
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82perl v5.34.0                      2022-01-21       Config::Grammar::Dynamic(3)
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