mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-25 19:17:19 +00:00
80256b4dab
* Add string '.htm' to 'Saving with TiddlyIE' * Change external links to match locale with wiki language * Add instructions for use to 'Saving on Android' * Change string in 'task' * Change instructions for use in 'Saving on iPad/iPhone' * Add newline to 'TiddlyDesktop Releases' * Remove caption from 'Serving TW5 from Android' * Change link to external in tiddlers which tagged 'Editions' * Remove string 'index.html' from 'Some of the things you can do with TiddlyWiki' * Change link 'TiddlyWiki Groups' to 'Forums' in tiddlers which tagged 'Community' * Remove CamelCase link 'TiddlyWiki' from tiddlers tagged 'Community' * Change string 'done' to 'Upgrade' in 'UpgradeMechanism' * Change buttons to images in 'How to export tiddlers' * Add images about buttons to tiddlers * Add quotation mark to text 'edit' in 'Signing the Contributor License Agreement' * Rename 'UsingSVG' to 'Using SVG' * Change link 'TypedBlockWikiText' to 'Typed Blocks in WikiText' in 'Using SVG' * Add tiddler 'Using Stamp' * Add 'rel="noopener noreferrer"' to external links * Add description about 'rel="noreferrer"' to 'HTML in WikiText' * Add link of prerelease version about translators edition, and how to translate on Node.js, in 'Translate TiddlyWiki into your language' * Change string 'dropdown' to 'tab' in 'Installing a plugin from the plugin library' * Add download button to 'Empty Edition'
18 lines
1.0 KiB
Plaintext
18 lines
1.0 KiB
Plaintext
created: 20150105133800000
|
|
modified: 20150124181306000
|
|
title: Railroad Diagrams
|
|
|
|
<<.def "Railroad diagrams">>, sometimes called <<.def "syntax diagrams">>, are a visual way of explaining the syntax rules of a computer language. Reading one is like reading a public transport map.
|
|
|
|
Each diagram starts on the left and ends on the right. Simply follow any line from the startpoint to the endpoint. All the alternative lines are equally valid. A line will sometimes jump over an item that is optional, or loop back to indicate that an item can be repeated.
|
|
|
|
<$railroad text="""
|
|
start [:optional] {repeated +","} end
|
|
"""/>
|
|
|
|
In the example above, a comma appears between each occurrence of the `repeated` item. The comma path runs from right to left, and can only be reached by first passing through `repeated`.
|
|
|
|
Characters in round boxes are literal, i.e. they denote themselves. A name in a rectangular box denotes a further railroad diagram.
|
|
|
|
The railroad diagrams in ~TiddlyWiki's documentation are generated with the [[Railroad Plugin]].
|