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(apropos-fold, submodules, apropos): Be careful not

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to access unbound variables.
This commit is contained in:
Marius Vollmer 2001-06-02 18:32:03 +00:00
parent 094a67bb4c
commit aef9dd6536
1 changed files with 11 additions and 7 deletions
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16
ice-9/session.scm
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@ -257,12 +257,14 @@ where OPTIONSET is one of debug, read, eval, print
(display name)
(display ": ")
(display (car x))
(cond ((procedure? (variable-ref (cdr x)))
(cond ((variable-bound? (cdr x))
(let ((val (variable-ref (cdr x))))
(cond ((or (procedure? val) value)
(display separator)
(display (variable-ref (cdr x))))
(value
(display val)))))
(else
(display separator)
(display (variable-ref (cdr x)))))
(display "(unbound)")))
(if (and shadow
(not (eq? (module-ref module
(car x))
@ -313,7 +315,9 @@ Fourth arg FOLDER is one of
data)))
(module-filter
(lambda (name var data)
(obarray-filter name (variable-ref var) data))))
(if (variable-bound? var)
(obarray-filter name (variable-ref var) data)
data))))
(cond (module (hash-fold module-filter
data
(module-obarray module)))
@ -352,7 +356,7 @@ It is an image under the mapping EXTRACT."
(define (submodules m)
(hash-fold (lambda (name var data)
(let ((obj (variable-ref var)))
(let ((obj (and (variable-bound? var) (variable-ref var))))
(if (and (module? obj)
(eq? (module-kind obj) 'directory))
(cons obj data)