The following keywords are reserved by the language and cannot be used as identifiers (i.e. as variable, function, method, or class names):

• as
• assert
• break
• class
• continue
• def
• echo
• else
• enum
• extends
• false
• for
• if
• import
• in
• let
• loop
• null
• pri
• pub
• return
• self
• static
• super
• true
• try
• typedef
• var
• with
• while

The following keywords are reserved for future use:

• async
• await
• case
• catch
• defer
• guard
• implements
• interface
• match
• reimport
• run
• select
• struct
• switch