,preview,run expexp, printing the result(s) and making them
(or a list of them, if exp returns multiple results)
the new focus object.
The ,run command is useful when writing
command programs.
,trace name ...name, not the behavior of the
procedure that is its current value. Name is redefined
to be a procedure that prints a message,
calls the original value of name, prints another
message, and finally passes along the value(s) returned by the
original procedure.
,untrace name ...,condition,condition command displays the condition object
describing the error or interrupt that initiated the current
command level. The condition object becomes the current focus
value. This is particularly useful in conjunction with
the inspector. For example, if a procedure is passed the wrong number of
arguments, do ,condition followed by
,inspect to inspect the
procedure and its arguments.
,bound? namename, if there is one, and otherwise
prints `Not bound'.
,expand form
,expand-all formform, if any.
,expand performs a single macro expansion while
,expand-all fully expands all macros in form.
,where procedureprocedure's source code.
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