Chapter 13
Other Built-In Objects
Other Built-In Objects
Dylan contains a small number of predefined unique program constants, described below.
#t [<boolean>]
#f [<boolean>]
The false value.
$permanent-hash-state [<object>]
A hash state that is always valid.
This is an implementation-dependent hash state that indicates that the associated hash id is always valid, and does not depend on any mutable property of the object that can be changed without a visible modification to the object.
#() [<empty-list>]
The empty list.