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algol60: fix passing array slot as by-reference argument (PR 9895)

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svn: r12373
This commit is contained in:
Matthew Flatt 2008-11-10 14:33:51 +00:00
parent 80b462c5e5
commit 49a4a3a26f
1 changed files with 14 additions and 9 deletions
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23
collects/algol60/compile.ss
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@ -316,14 +316,19 @@
(define (compile-argument arg context)
(cond
[(and (a60:variable? arg)
(not (let ([v (a60:variable-name arg)])
(or (procedure-variable? v context)
(label-variable? v context)
(primitive-variable? v context)))))
`(case-lambda
[() ,(compile-expression arg context 'any)]
[(val) ,(compile-statement (make-a60:assign (list arg) 'val) 'void context)])]
[(or (and (a60:variable? arg)
(not (let ([v (a60:variable-name arg)])
(or (procedure-variable? v context)
(label-variable? v context)
(primitive-variable? v context)))))
(a60:subscript? arg))
(let ([arg (if (a60:subscript? arg)
(make-a60:variable (a60:subscript-array arg)
(list (a60:subscript-index arg)))
arg)])
`(case-lambda
[() ,(compile-expression arg context 'any)]
[(val) ,(compile-statement (make-a60:assign (list arg) 'val) 'void context)]))]
[(identifier? arg)
(compile-argument (make-a60:variable arg null) context)]
[else `(lambda () ,(compile-expression arg context 'any))]))
@ -474,7 +479,7 @@
(and (pair? v)
(eq? (car v) 'by-name)
(cadr v))))
(define (procedure-variable? var context)
(let ([v (var-binding var context)])
(eq? v 'procedure)))