Config::Grammar::Dynamic(3)
NAME
Config::Grammar::Dynamic - A grammar-based, user-friendly config parser
DESCRIPTION
Config::Grammar::Dynamic is like Config::Grammar but with some
additional features useful for building configuration grammars that are
dynamic, i.e. where the syntax changes according to configuration
entries in the same file.
The following keys can be additionally specified in the grammar when
using this module:
Special Section Keys
_dyn A subroutine reference (function pointer) that will be
called when a new section of this syntax is encountered.
The subroutine will get three arguments: the syntax of the
section name (string or regexp), the actual name
encountered (this will be the same as the first argument
for non-regexp sections) and a reference to the grammar
tree of the section. This subroutine can then modify the
grammar tree dynamically.
_dyndoc A hash reference that lists interesting names for the
section that should be documented. The keys of the hash are
the names and the values in the hash are strings that can
contain an explanation for the name. The _dyn() subroutine
is then called for each of these names and the differences
of the resulting grammar and the original one are
documented. This module can currently document differences
in the _vars list, listing new variables and removed ones,
and differences in the _sections list, listing the new and
removed sections.
_recursive Array containing the list of those sub-sections that are
recursive, ie. that can contain a new sub-section with the
same syntax as themselves.
The same effect can be accomplished with circular
references in the grammar tree or a suitable _dyn section
subroutine (see below}, so this facility is included just
for convenience.
Special Variable Keys
_dyn A subroutine reference (function pointer) that will be
called when the variable is assigned some value in the
config file. The subroutine will get three arguments: the
name of the variable, the value assigned and a reference to
the grammar tree of this section. This subroutine can then
modify the grammar tree dynamically.
Note that no _dyn() call is made for default and inherited
values of the variable.
_dyndoc A hash reference that lists interesting values for the
variable that should be documented. The keys of the hash
are the values and the values in the hash are strings that
can contain an explanation for the value. The _dyn()
subroutine is then called for each of these values and the
differences of the resulting grammar and the original one
are documented. This module can currently document
differences in the _vars list, listing new variables and
removed ones, and differences in the _sections list,
listing the new and removed sections.
COPYRIGHT
Copyright (c) 2000-2005 by ETH Zurich. All rights reserved. Copyright
(c) 2007 by David Schweikert. All rights reserved.
LICENSE
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
AUTHORS
David Schweikert, Tobias Oetiker, Niko Tyni
perl v5.28.1 2019-03-20 Config::Grammar::Dynamic(3)
config-grammar 1.130.0 - Generated Sun May 5 07:19:01 CDT 2019