37 lines
1.1 KiB
Scheme
37 lines
1.1 KiB
Scheme
; Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees. See file COPYING.
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; Stuff for debugging new images:
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(define (ev form package)
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(invoke-template (compile-form form package)
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(package-uid package)))
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; If desired, this definition of invoke-template can be replaced by
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; something that starts up a different virtual machine.
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(define (invoke-template template env . args)
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(apply (make-closure template env)
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args))
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; Utility for tracking down uses of variables
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(define (who-uses name proc)
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(let recur ((tem (closure-template proc))
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(path '()))
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(let loop ((i 0))
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(if (< i (template-length tem))
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(let ((thing (template-ref tem i))
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(down (lambda (tem)
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(recur tem (cons (or (template-ref tem 1) i) path)))))
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(cond ((template? thing)
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(down thing))
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((location? thing)
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(if (eq? (location-name thing) name)
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(begin (write path) (newline))))
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((closure? thing)
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(down (closure-template thing))))
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(loop (+ i 1)))))))
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