Page 254	Table of Contents	Index	Page 256
	Chapters
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 A, B, C, D, E

CHAPTER 24. INPUT EDITING AND COMPLETION FACILITIES

help-string). help-option is either a symbol that is a help-type or a list of the form (help-type
mode-flag).
help-type must be one of:

:top-level-help - specifies that help-string be used instead of the default help documen-
tation provided by accept.
:subhelp - specifies that help-string be used in addition to the default help documentation
provided by accept.

mode-flag must be one of:

:append - specifies that the current help string be appended to any previous help strings
of the same help type. This is the default mode.
:override - specifies that the current help string is the help for this help type; no lower-
level calls to with-accept-help can override this. (:override works from the out-side
in.)
:establish-unless-overridden - specifies that the current help string be the help for
this help type unless a higher-level call to with-accept-help has already established a
help string for this help type in the :override mode. This is what accept uses to establish
the default help.

help-string is a string or a function that returns a string. If it is a function, it receives three ar-
guments, the stream, an action (either :help or :possibilities) and the help string generated
so far.

None of the arguments is evaluated.

Page 254	Table of Contents	Index	Page 256
	Chapters
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 A, B, C, D, E