NAME

TPath::Predicate - interface of square bracket sub-expressions in TPath expressions

VERSION

version 1.007

ATTRIBUTES

outer

Whether the predicate is inside or outside any grouping parentheses.

  //*[foo]    # inside  -- outer is false
  (//*)[foo]  # outside -- outer is true

This distinction, though available to all predicates, is especially important to index predicates.

  //*[0]

Means the root and any element which is the first child of its parents. While

  (//*)[0]

means the first of all elements -- the root.

METHODS

filter

Takes an index and a collection of TPath::Context objects and returns the collection of contexts for which the predicate is true.

ROLES

TPath::Stringifiable

AUTHOR

David F. Houghton <dfhoughton@gmail.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2013 by David F. Houghton.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.