Unary Operators

Table 2-1 lists Limbo's unary operators.

Table 2-1 Unary Operators

++	Increment (post- and prefix)
--	Decrement (post- and prefix)
+	Unary Plus
-	Unary Minus
!	Logical Negation (NOT)
*	Reference ADT indirection
<-	Channel operator (send and receive)
~	One's complement, bitwise negation (NOT)
ref	Reference to an ADT object
hd	List head
tl	List tail
tagof	Index of a pick element in an ADT
len	Return size of