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Module (chicken csi)

This module provides procedures to access features specific to the csi interactive interpreter.

toplevel-command

[procedure] (toplevel-command SYMBOL PROC [HELPSTRING])

Defines or redefines a toplevel interpreter command which can be invoked by entering ,SYMBOL. PROC will be invoked when the command is entered and may read any required argument via read (or read-line). If the optional argument HELPSTRING is given, it will be listed by the ,? command.

set-describer!

[procedure] (set-describer! TAG PROC)

Sets a custom description handler that invokes PROC when the ,d command is invoked with a record-type object that has the type TAG (a symbol). PROC is called with two arguments: the object to be described and an output-port. It should write a possibly useful textual description of the object to the passed output-port. For example:

#;1> (define-record-type point (make-point x y) point?
       (x point-x)
       (y point-y))
#;2> (set-describer! 'point 
       (lambda (pt o)
         (with-output-to-port o
           (lambda ()
             (print "a point with x=" (point-x pt) " and y=" (point-y pt))))))
#;3> ,d (make-point 1 2)
a point with x=1 and y=2

editor-command

[parameter] editor-command

Holds the name of an editor that should be used when the toplevel command ,e is used.

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