Operators

Class-defined operators

Unary operators

• (unary minus)

• (unary +) ~

! not

Binary arithmetic operators

& (binary & or formal block arg)

• (binary minus) %

• (binary *) ** / (binary /) ^ |

• (binary +) << (left shift)

Match operators

=~ !~

Comparison operators

<

= <= <=> == != ===

Language-defined operators

Assignment

=

Complex assignment

&&= ||=

|= %= &= **= *= ^= -= += /= <<=

=

Logical operators

&& || ? (ternary ?:) and or

defined?

defined?

Range constructors

Also for flipflops

.. ...

Operator precedence

No	Type	Description	Operators	Associativity
1	Unary	General	! ~ +	Right
2	Binary	Power	**	Right
3	Unary	Minus	-	Right
4	Binary	Products	* / %	Left
5	Binary	Additions	+ -	Left
6	Binary	Shifts	<< >>	Left
7	Binary	Bitwise and	&	Left
8	Binary	Bitwise or	`	^`
9	Binary	Directional comparisons	> >= < <=	Left (why?)
10	Binary	General comparisons	<=> == === != =~ !~	None
11	Binary	Logical and, argument form	&&	Left
12	Binary	Logical or, argument form	`
13	Binary	Range constructors	.. ...	Left

%right '?' ':' %left modifier_rescue %right '=' tOP_ASGN %nonassoc keyword_defined %right keyword_not %left keyword_or keyword_and %nonassoc modifier_if modifier_unless modifier_while modifier_until