Config::Model::Role::ComputeFunction

NAME

Config::Model::Role::ComputeFunction - compute &index or &element functions

VERSION

version 2.152

SYNOPSIS

 $value->eval_function('index');
 $value->eval_function('element');
 $value->eval_function('index','-');
 $value->eval_function('index','- -');
 $value->eval_function('index','-3');
 $value->compute_string('&element(-)')
 $value->compute_string('&index(- -)');

DESCRIPTION

Role used to let a value object get the index or the element name of $self or of a node above.

METHODS

eval_function

Retrieve the index or the element name. Parameters are

 ( function_name , [ up  ])

function_name

"element" or "index"

up

Optional parameter to indicate how many level to go up before retrieving the index or element name. Each "-" is equivalent to a call to "parent|Config::Model::Node/parent". Can be repeated dashes (""-"", ""- -"", ...) or a dash with a multiplier (""-"", ""-2"", ...). White spaces are ignored.

compute_string

Perform a similar function as "eval_function" using a string where function names are extracted. E.g. "compute_string('&element(-)')" calls "eval_function('element','-')"

AUTHOR

Dominique Dumont

COPYRIGHT AND LICENSE

This software is Copyright (c) 2005-2022 by Dominique Dumont. This is free software, licensed under:

  The GNU Lesser General Public License, Version 2.1, February 1999