created: 20230726143617389
modified: 20230726150625716
tags: [[Variable Usage]]
title: Behaviour of variables invoked via filter operator parameter
type: text/vnd.tiddlywiki

|tc-first-col-min-width|k
|!how declared|!behaviour|
|\define|Textual substitution of parameters is performed on the body text. No further processing takes place. The result after textual substitution is used as the filter operator's parameter.|
|<<.wlink SetWidget>>, <<.wlink LetWidget>>, <<.wlink VarsWidget>>, \procedure, \widget|Body text is retrieved as-is and used as the filter operator's parameter.|
|\function|The body text of the function is treated as a filter expression and evaluated. The first result is passed to the operator as a parameter. The remaining results are discarded.|