TiddlyWiki5/editions/test/tiddlers/tests/data/globals/Procedures.tid

title: Globals/Procedures
description: Global procedures in shadow variables
type: text/vnd.tiddlywiki-multiple
tags: [[$:/tags/wiki-test-spec]]

title: Output

\whitespace trim

<<this-is-one>>
|
<<this-is-one blah>>
+
title: $:/global/this-is-one

\whitespace trim

\procedure example()
ONE
\end

\parameters (foo:"nothing")
<<example>>-<$text text=<<foo>>/>
+
title: ExpectedResult

<p>ONE-nothing</p><p>|ONE-blah</p>
Introduce true global variables The basic idea is that if we don't find a variable `foo` then we fallback to retrieving the value from the tiddler `$:/global/foo`, if it exists. This allows us to replace the usual importvariables-based mechanism for global definitions, avoiding cluttering up the variable namespace with every macro. In order to permit subprocedures to be overridden, we also introduce a mechanism for conditional definitions: preceding the word definition\|procedure\|function\|widget with a + causes the definition only to occur if the specified variable doesn't already exist. In the next commit we'll apply this mechanism to the tabs macro 2022-05-28 11:23:50 +00:00			`title: Globals/Procedures`
			`description: Global procedures in shadow variables`
			`type: text/vnd.tiddlywiki-multiple`
			`tags: [[$:/tags/wiki-test-spec]]`

			`title: Output`

			`\whitespace trim`

			`<<this-is-one>>`
			`\|`
			`<<this-is-one blah>>`
			`+`
			`title: $:/global/this-is-one`

			`\whitespace trim`

			`\procedure example()`
			`ONE`
			`\end`

			`\parameters (foo:"nothing")`
			`<<example>>-<$text text=<<foo>>/>`
			`+`
			`title: ExpectedResult`

			`<p>ONE-nothing</p><p>\|ONE-blah</p>`