NAME

Data::Transform::Type - a transformer that filters based on a predicate function

DESCRIPTION

Data::Transform::Predicate is a transformer that uses a predicate predicate function to determine whether it applies. This allows extrinsic logic to be applied to select appropriate transformers.

FIELDS

predicate (required param)

The predicate function. Must be a CODE refereence. Receives the node value and position as parameters and returns a simple true/false value.

transformer (required parameter)

A Data::Transform transformer conforming to the Data::Transform::Node role. Weird things will happen if you provide a Data::Transform::Tree -type transformer, so you probably shouldn't do that.

METHODS

applies_to( %params )

Requires $params{value} and $params{position} to exist

If $predicate returns true when possed the value and position (in that order), returns $MATCH_EXACT.

Otherwise returns $NO_MATCH.

AUTHOR

Mark Tyrrell <mtyrrell@cpan.org>

LICENSE

Copyright (c) 2023 Mark Tyrrell

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.