NAME
App::SimpleScan::Substitution - simple_scan variable substitution support
SYNOPSIS
use App::SimpleScan::Substitution;
# App::SimpleScan::Substitution->new() will create a new object
# with an empty dictionary: any string passed to it will be returned
# unchanged.
#
# Create a new object using a dictionary
my $engine = App::SimpleScan::Substitution( { defs => \%dictionary } );
my @substituted_strings = $engine->expand($string);
# Swap dictionaries.
$engine->dictionary(\%new_hash);
my @different_strings = $engine->expand($string);DESCRIPTION
App::SimpleScan::Substitution encapsulates simple_scan's combinatorial substitution algorith in a class. This allows us to isolate it from the rest of simple_scan's code (and potentially reuse it later).
INTERFACE
Class methods
new
Creates a new instance of the substitution engine. If a dictionary is supplied, it is stored to be used during calls to expand().
Instance methods
dictionary()
Replaces the current dictionary with a new one. The dictionary is passed in as a hash reference and stored as such. This means if the dictionary hash is changed externally, then the updates are automatically reflected in the dictionary we'll use.
expand(@strings)
Expands the string (or strings) passed as an argument using the current dictionary.
substitution_value($name, @optional_values)
Setter/getter for dictionary entries. If a list of values is supplied, the substitution value is set. In all cases, the value is returned.
delete_substitution($name)
Deletes the named substitution from the dictionary. No action if the substitution is not found.
DIAGNOSTICS
Argument to new is not a hash ref-
The new() argument must be a hash ref, if any argument is supplied at all. This is most commonly caused by supplying 'dictionary => /%some hash' and forgetting to put curly braces around it.
dictionary must be a hash reference-
You passed in a value for dictionary that wasn't a hash reference. Did you forget to say \%hash?
find_vars_callback must be a code reference-
You passed in a value for find_vars_callback that wasn't a code reference. Did you try to just use a regex without sub{} around it?
CONFIGURATION AND ENVIRONMENT
App::SimpleScan::Substitution requires no configuration files or environment variables.
DEPENDENCIES
None.
INCOMPATIBILITIES
None reported.
BUGS AND LIMITATIONS
No bugs have been reported.
Please report any bugs or feature requests to bug-app-simplescan@rt.cpan.org, or through the web interface at http://rt.cpan.org.
AUTHOR
Joe McMahon <mcmahon@yahoo-inc.com >
LICENCE AND COPYRIGHT
Copyright (c) 2005, Joe McMahon <mcmahon@yahoo-inc.com >. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
DISCLAIMER OF WARRANTY
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.
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