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Going through the computation with the LispWorks stepper is rather intuitive, but I cant figure it out in SBCL. Can somebody please give me a step-by-step example of how to use the SBCL stepper in the REPL on some simple function? Thanks.
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SBCL provides a recursive event loop ( serve-event ) for doing non-blocking IO on multiple streams without using threads. SBCL allows restricting the execution time of individual operations or parts of a computation using :timeout arguments to certain blocking operations, synchronous timeouts and asynchronous timeouts.
To quit SBCL, type (quit) .
You can quit your lisp session by getting to the command line (possibly through pressing Control-C), then typing (quit) and pressing return.
* (proclaim '(optimize (debug 3)))
* (defun foo (a b) (* (+ a b) b))
FOO
* (step (foo 1 2))
; Evaluating call:
; (FOO 1 2)
; With arguments:
; 1
; 2
1] step
; Evaluating call:
; (+ A B)
; With unknown arguments
0] step
; Evaluating call:
; (* (+ A B) B)
; With unknown arguments
0] step
; (FOO 1 2) => 6
Commands:
Stepping:
START Selects the CONTINUE restart if one exists and starts
single-stepping. Single stepping affects only code
compiled with under high DEBUG optimization quality.
See User Manual for details.
STEP Steps into the current form.
NEXT Steps over the current form.
OUT Stops stepping temporarily, but resumes it when the topmost
frame that was stepped into returns.
STOP Stops single-stepping.
See the SBCL manual: single stepping.
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