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fix 2d lexer for the case when the #2d expression

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isn't in the leftmost column

original commit: 93bf0cd663070e5b6df4cda8377be9f7f8f5463f
This commit is contained in:
Robby Findler 2013-02-15 10:28:49 -06:00
parent 06ca5775a5
commit 23f6a46faf
1 changed files with 7 additions and 9 deletions
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16
collects/unstable/2d/private/lexer.rkt
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@ -115,14 +115,12 @@ todo:
0
a-2d-lexer-state)]
[else
(define port->peek-port-delta
(let-values ([(_1 _2 c-pos) (port-next-location port)])
c-pos))
(define base-position
;; one might think that this should depend on the length of eol-string
;; but ports that have port-count-lines! enabled count the \r\n combination
;; as a single position in the port, not 2.
(+ pos port->peek-port-delta -1))
;; as a single position in the port, not two.
(let-values ([(_1 _2 c-pos) (port-next-location port)])
c-pos))
(define peek-port (peeking-input-port port))
;; pull the newline out of the peek-port
(for ([x (in-range (string-length eol-string))]) (read-char peek-port))
@ -154,7 +152,7 @@ todo:
(cond
[(exn:fail:read? failed)
(define error-pos (- (srcloc-position (car (exn:fail:read-srclocs failed)))
port->peek-port-delta)) ;; account for the newline
base-position)) ;; account for the newline
(define peek-port2 (peeking-input-port port))
(port-count-lines! peek-port2)
@ -261,8 +259,8 @@ todo:
;; outermost rectangle (at a minimum, newlines); this fills those
;; in with whitespace tokens
(define cracks-filled-in-tokens
(let loop ([fst (car sorted-tokens)]
[tokens (cdr sorted-tokens)])
(let loop ([fst newline-token]
[tokens sorted-tokens])
(cond
[(null? tokens) (list fst)]
[else
@ -283,7 +281,7 @@ todo:
new-start
new-end)
(loop snd (cdr tokens)))])])))
(cons newline-token cracks-filled-in-tokens)]))
cracks-filled-in-tokens]))
(values first-tok-string 'hash-colon-keyword #f
pos (+ pos (string-length first-tok-string))