4.28 Reserved Words

For your reference, here is an alphabetical list of all reserved words:

• __defpreproc__
• __defstatedir__
• __file__
• __function__
• __line__
• __major__
• __minor__
• __module__
• __package__
• __patch__
• __preproc__
• __statedir__
• __version__
• accept
• add
• and
• alias
• begin
• break
• bye
• case
• catch
• const
• continue
• default
• delete
• discard
• do
• done
• echo
• end
• elif
• else
• fi
• fnmatches
• for
• from
• func
• if
• import
• loop
• matches
• module
• next
• not
• number
• on
• or
• pass
• precious
• prog
• public
• reject
• replace
• return
• returns
• require
• set
• static
• string
• switch
• tempfail
• throw
• try
• vaptr
• when
• while

Several keywords are context-dependent: mx is a keyword if it appears before matches or fnmatches. Following strings are keywords in on context:

• as
• host
• poll

The following keywords are preprocessor macros:

• defined
• _ (an underscore)
• N_

Any keyword beginning with a ‘m4_’ prefix is a reserved preprocessor symbol.