Construct with no projections
A value that signifies an optional value that has been omitted, an ordered comparison that resulted in equality, or an empty list.
A value that signifies a successful result, an optional value that is present, or an ordered comparison that determines the inputs were successfully in ascending order already.
A value that signifies an unsuccessful result or an ordered comparison that determines the inputs were not successfully in ascending order already.
Represents a linked list with the indicated
car as its head element and the indicated
cdr as its linked list tail.
Represents a key-value pair.
A linked list can have these as its elements to represent an ordered mapping known as an association list.