created: 20240310165023000
modified: 20240310172648116
tags: [[Procedure Syntax]]
title: Procedure Call Syntax
type: text/vnd.tiddlywiki

<<.preamble """What follows is a formal presentation of the syntax of the WikiText syntax for procedure calls, using [[railroad diagrams|Railroad Diagrams]].""">>

!! procedure-name

<$railroad text="""
"<<" [[ procedure-name |Procedures]] [: [[whitespace|"Filter Whitespace"]] [:{param-value}] ]">>"
"""/>

* The [[procedure's|Procedures]] <<.place procedure-name>> is a sequence of non-whitespace characters other than `(` or `>`.

* <<.place whitespace>> denotes a sequence of [[whitespace characters|Filter Whitespace]].

!!! param-value

Each ''individual'' <<.place param-value>> has the following syntax:

<$railroad text="""
\start none
\end none
[: param-name [:[[whitespace|"Filter Whitespace"]]] ":" [:[[whitespace|"Filter Whitespace"]]] ] value [: [[whitespace|"Filter Whitespace"]] ]
"""/>

* The <<.place param-name>> is a sequence of letters (`A`--`Z`, `a`--`z`), digits (`0`--`9`), hyphens (`-`) and underscores (`_`).

* The <<.place value>> is specified as follows:

<$railroad text={{$:/editions/tw5.com/railroad/macro-parameter-value}}/>