Or Statements

Or Statements

Or statements define alternative paths - the parser matches one of the listed options.

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Syntax

<| optionA <||> optionB <||> ... |>

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Example

A function with an optional visibility modifier:

<:function:> <| private <||> public <||> |> function <<name>> ( ) { <---> } <:>

Input	Matched Option
private function myFunc () { }	private
public function myFunc () { }	public
function myFunc () { }	(empty - optional)

Tip: An empty option before |> makes the entire or-block optional (zero occurrences accepted).

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In Practice

The Basics grammar uses or-statements in several places:

Object	Or-statement	Alternatives
import	<| <<name:up>> <||> { <<name:up>> } |>	Direct import (import X) or destructured import (import { X })
import	<| ; <||> \n |>	Import ends with semicolon or newline
class / function	<| , <||> <<NAME:down>> |>	Parameter preceded by comma, or first parameter (no comma)

In the Test_Repo, import { C2 } from './bridgeTest2.txt' matches the { <<name:up>> } branch, while import C3 from '../refFile.txt' would match the <<name:up>> branch.

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Next: Repeat Statements - Matching a pattern zero or more times.