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move the with-stack-checkpoint wrapper code into the eval handler

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so tools that override the handler can get direct access to the
unexpanded syntax objects if they want them
This commit is contained in:
Robby Findler 2013-08-28 10:37:10 -05:00
parent 9b99dc2a25
commit abc7f9a873
1 changed files with 39 additions and 25 deletions
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64
pkgs/drracket-pkgs/drracket/drracket/private/rep.rkt
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@ -381,6 +381,8 @@ TODO
(define after-expression (make-parameter #f))
(define do-dance (make-parameter #f))
(define text-mixin
(mixin ((class->interface text%)
text:ports<%>
@ -1087,31 +1089,8 @@ TODO
(define results
(call-with-values
(λ ()
;; we duplicate the 'expand-syntax-to-top-form' dance that eval-syntax
;; does here, so that we can put 'with-stack-checkpoint's in to limit
;; the amount of DrRacket code we see in stacktraces
(let loop ([stx sexp/syntax/eof])
(define top-expanded (with-stack-checkpoint (expand-syntax-to-top-form stx)))
(syntax-case top-expanded (begin)
[(begin a1 . args)
(let lloop ([args (syntax->list #'(a1 . args))])
(cond
[(null? (cdr args))
(loop (car args))]
[else
(loop (car args))
(lloop (cdr args))]))]
[_
(let ([expanded (with-stack-checkpoint (expand-syntax top-expanded))])
(call-with-continuation-prompt
(λ ()
(with-stack-checkpoint (eval-syntax expanded)))
(default-continuation-prompt-tag)
(λ args
(apply
abort-current-continuation
(default-continuation-prompt-tag)
args))))])))
(parameterize ([do-dance #t])
(eval-syntax sexp/syntax/eof)))
list))
(parameterize ([pretty-print-columns pretty-print-width])
(for ([x (in-list results)])
@ -1250,6 +1229,41 @@ TODO
(reset-logger-messages)
(current-eval
(let ([oe (current-eval)])
(define (drracket-eval-handler sexp/syntax)
(cond
[(do-dance)
;; we duplicate the 'expand-syntax-to-top-form' dance that eval-syntax
;; does here, so that we can put 'with-stack-checkpoint's in to limit
;; the amount of DrRacket code we see in stacktraces
(parameterize ([do-dance #f])
(let loop ([stx sexp/syntax])
(define top-expanded (with-stack-checkpoint (expand-syntax-to-top-form stx)))
(syntax-case top-expanded (begin)
[(begin a1 . args)
(let lloop ([args (syntax->list #'(a1 . args))])
(cond
[(null? (cdr args))
(loop (car args))]
[else
(loop (car args))
(lloop (cdr args))]))]
[_
(let ([expanded (with-stack-checkpoint (expand-syntax top-expanded))])
(call-with-continuation-prompt
(λ ()
(with-stack-checkpoint (oe expanded)))
(default-continuation-prompt-tag)
(λ args
(apply
abort-current-continuation
(default-continuation-prompt-tag)
args))))])))]
[else
(oe sexp/syntax)]))
drracket-eval-handler))
(let* ([init-thread-complete (make-semaphore 0)]
[goahead (make-semaphore)])