rhaj/rhai_engine/rhaibook/appendix/operators.md

Operators and Symbols

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Operators

Operator	Description	Binary?	Binding direction
+	add	yes	left
-	1) subtract 2) negative (prefix)	yes no	left right
*	multiply	yes	left
/	divide	yes	left
%	modulo	yes	left
**	power/exponentiation	yes	right
>>	right bit-shift	yes	left
<<	left bit-shift	yes	left
&	1) bit-wise AND 2) boolean AND	yes	left
|	1) bit-wise OR 2) boolean OR	yes	left
^	1) bit-wise XOR 2) boolean XOR	yes	left
=, +=, -=, *=, /=, **=, %=, <<=, >>=, &=, |=, ^=	assignments	yes	n/a
==	equals to	yes	left
!=	not equals to	yes	left
>	greater than	yes	left
>=	greater than or equals to	yes	left
<	less than	yes	left
<=	less than or equals to	yes	left
&&	boolean AND (short-circuits)	yes	left
||	boolean OR (short-circuits)	yes	left
??	null-coalesce (short-circuits)	yes	left
!	boolean NOT	no	right
[ ... ], ?[ ... ]	indexing	yes	left
., ?.	1) property access 2) method call	yes	left
..	exclusive range	yes	left
..=	inclusive range	yes	left

Symbols and Patterns

Symbol	Name	Description
_	underscore	default switch case
;	semicolon	statement separator
,	comma	list separator
:	colon	[object map] property value separator
::	path	module path separator
#{ ... }	hash map	[object map] literal
" ... "	double quote	[string]
` ... `	back-tick	multi-line literal [string]
' ... '	single quote	[character]
\	1) escape 2) line continuation	escape character literal
()	unit	null value
( ... )	parentheses	expression grouping
{ ... }	braces	block statement
| ... |	pipes	closure
[ ... ]	brackets	[array] literal
!	bang	function call in calling scope
=>	double arrow	switch expression case separator
//	comment	line comment
///	doc-comment	line [doc-comment]
//!	module doc	[module documentation][comments]
/* ... */	comment	block comment
/** ... */	doc-comment	block [doc-comment]
(* ... *)	comment	reserved
#!	shebang	reserved
++	increment	reserved
--	decrement	reserved
...	rest	reserved
~	tilde	reserved
!.		reserved
?	question	reserved
#	hash	reserved
@	at	reserved
$	dollar	reserved
->	arrow	reserved
<-	left arrow	reserved
<|	left triangle	reserved
|>	right triangle	reserved
===	strict equals to	reserved
!==	strict not equals to	reserved
:=	assignment	reserved
:;	typo to ::	reserved
::< ... >	turbofish	reserved