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ikarus
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some asserion violations in the reader are converted to &lexicals so 

that the repl displays them properly.  E.g., 
(read (open-string-input-port "#!r6rs |foo|")) shows an &assertion,
but typing #!r6rs |foo| at the repl causes the repl to reset without
a message.
This commit is contained in:
Abdulaziz Ghuloum 2009-07-30 21:46:11 +03:00
parent af233a2ac2
commit b586d2e21a
2 changed files with 12 additions and 12 deletions
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22
scheme/ikarus.reader.ss
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@ -774,7 +774,7 @@
(tokenize-dot p)]
[($char= #\| c)
(when (eq? (port-mode p) 'r6rs-mode)
(die 'tokenize "|symbol| syntax is invalid in #!r6rs mode"))
(die/p p 'tokenize "|symbol| syntax is invalid in #!r6rs mode"))
(let ([ls (reverse (tokenize-bar p '()))])
(cons 'datum (string->symbol (list->string ls))))]
[($char= #\\ c)
@ -785,7 +785,7 @@
;[($char= #\{ c) 'lbrace]
[($char= #\@ c)
(when (eq? (port-mode p) 'r6rs-mode)
(die 'tokenize "@-expr syntax is invalid in #!r6rs mode"))
(die/p p 'tokenize "@-expr syntax is invalid in #!r6rs mode"))
'at-expr]
[else
(die/p-1 p 'tokenize "invalid syntax" c)])))
@ -1441,7 +1441,7 @@
(lambda (x)
(let ([loc (cdr x)])
(when (loc-set? loc) ;;; FIXME: pos
(die 'read "duplicate mark" n))
(die/p p 'read "duplicate mark" n))
(set-loc-value! loc expr)
(set-loc-value^! loc expr^)
(set-loc-set?! loc #t)
@ -1460,7 +1460,7 @@
(let ([loc (make-loc #f 'unused #f)])
(let ([locs (cons (cons n loc) locs)])
(values loc 'unused locs k)))]))]
[else (die 'read "invalid token" t)])]
[else (die/p p 'read "invalid token" t)])]
[else
(die/p-1 p 'read
(format "unexpected ~s found" t))])))
@ -1474,11 +1474,11 @@
(parse-token p locs k t pos)))))
(define reduce-loc!
(define (reduce-loc! p)
(lambda (x)
(let ([loc (cdr x)])
(unless (loc-set? loc)
(die 'read "referenced mark is not set" (car x)))
(die/p p 'read "referenced mark is not set" (car x)))
(when (loc? (loc-value loc))
(let f ([h loc] [t loc])
(if (loc? h)
@ -1486,7 +1486,7 @@
(if (loc? h1)
(begin
(when (eq? h1 t)
(die 'read "circular marks"))
(die/p p 'read "circular marks"))
(let ([v (f (loc-value h1) (loc-value t))])
(set-loc-value! h1 v)
(set-loc-value! h v)
@ -1511,7 +1511,7 @@
(cond
[(null? locs) expr]
[else
(for-each reduce-loc! locs)
(for-each (reduce-loc! p) locs)
(k)
(if (loc? expr)
(loc-value expr)
@ -1523,7 +1523,7 @@
(cond
[(null? locs) expr]
[else
(for-each reduce-loc! locs)
(for-each (reduce-loc! p) locs)
(k)
(if (loc? expr)
(loc-value expr)
@ -1538,7 +1538,7 @@
(cond
[(null? locs) (return-annotated expr^)]
[else
(for-each reduce-loc! locs)
(for-each (reduce-loc! p) locs)
(k)
(if (loc? expr)
(loc-value^ expr)
@ -1551,7 +1551,7 @@
(cond
[(null? locs) (return-annotated expr^)]
[else
(for-each reduce-loc! locs)
(for-each (reduce-loc! p) locs)
(k)
(if (loc? expr)
(loc-value^ expr)

2
scheme/last-revision
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@ -1 +1 @@
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