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refactor code in a better way, especially for changes that will follow

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svn: r15176
This commit is contained in:
Eli Barzilay 2009-06-15 08:59:13 +00:00
parent e95f60380e
commit 54fc941f1f
1 changed files with 19 additions and 23 deletions
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42
collects/syntax/module-reader.ss
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@ -48,31 +48,27 @@
#,@body
(#%provide (rename lang:read read) (rename lang:read-syntax read-syntax)
read-properties get-info-getter get-info)
(define lang #,~lang)
(define rd #,~read)
(define rds #,~read-syntax)
(define w1 #,~wrapper1)
(define w2 #,~wrapper2)
(define w2* (cond [(not w2) (lambda (in r _) (r in))]
[(procedure-arity-includes? w2 3) w2]
[else (lambda (in r _) (w2 in r))]))
(define whole? #,~whole-body-readers?)
(define (lang:read in modpath line col pos)
;; just read and discard them in this case
(read-properties in modpath line col pos)
(w2* in (lambda (in)
(wrap-internal lang in rd whole?
w1 #f modpath #f line col pos))
#f))
(wrap-internal/wrapper #f #f in modpath line col pos))
(define (lang:read-syntax src in modpath line col pos)
(define props (read-properties in modpath line col pos))
(syntax-property
(w2* in (lambda (in)
(wrap-internal lang in (lambda (in) (rds src in)) whole?
w1 #t modpath src line col pos))
#t)
'module-language
(vector (syntax->datum modpath) 'get-info-getter props)))
(wrap-internal/wrapper #t src in modpath line col pos))
(define (wrap-internal/wrapper stx? src in modpath line col pos)
(let* ([props (read-properties in modpath line col pos)]
[lang #,~lang]
[read (if stx? (lambda (in) (#,~read-syntax src in)) #,~read)]
[w1 #,~wrapper1]
[w2 #,~wrapper2]
[whole? #,~whole-body-readers?]
[rd (lambda (in) (wrap-internal lang in read whole? w1 stx?
modpath src line col pos))]
[r (cond [(not w2) (rd in)]
[(procedure-arity-includes? w2 3) (w2 in rd stx?)]
[else (w2 in rd)])])
(if stx?
(syntax-property r 'module-language
(vector (syntax->datum modpath) 'get-info-getter
props))
r)))
(define (read-properties in modpath line col pos)
;; !!! TODO
#f)