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Macro stepper:

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added option to force letrec transformation
  made macro hiding slightly more resilient in presence of local actions

svn: r5932
This commit is contained in:
Ryan Culpepper 2007-04-13 21:26:49 +00:00
parent bdd53d5f3c
commit d29f1d82fc
2 changed files with 26 additions and 10 deletions
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20
collects/macro-debugger/model/hide.ss
View File

@ -11,6 +11,7 @@
(provide hide/policy
macro-policy
force-letrec-transformation
seek-syntax
current-hiding-warning-handler
(struct nonlinearity (message paths))
@ -473,18 +474,23 @@
;; for-bderiv : BlockDerivation -> (values BlockDerivation (list-of syntax))
(define (for-bderiv bd)
(if (force-letrec-transformation)
(match bd
[(IntQ bderiv (es1 es2 pass1 trans pass2))
(recv [(pass2 es2) (for-lderiv pass2)]
(values (rewrap/nt bd (make-bderiv es1 es2 pass1 trans pass2))
es2))])
(match bd
[(IntQ bderiv (es1 es2 pass1 trans pass2))
(let ([pass2 (bderiv->lderiv bd)])
(recv [(pass2 es2) (for-lderiv pass2)]
(values (rewrap/nt bd (make-bderiv es1 es2 null 'list pass2))
es2)))]
[#f (values #f #f)]))
[#f (values #f #f)])))
(for-deriv deriv))
;
; ;;
; ;;
@ -728,9 +734,15 @@
(define (for-local-action local)
(match local
[(struct local-expansion (e1 e2 me1 me2 for-stx? deriv))
(raise (make-localactions))]
(let-values ([(rename-subtersm2 table2) (do-rename me1 e1)])
(let ([subterms (for-deriv deriv)])
(when (pair? (filter s:subterm? subterms))
(raise (make-localactions)))))]
[(struct local-expansion/expr (e1 e2 me1 me2 for-stx? opaque deriv))
(raise (make-localactions))]
(let-values ([(rename-subtersm2 table2) (do-rename me1 e1)])
(let ([subterms (for-deriv deriv)])
(when (pair? (filter s:subterm? subterms))
(raise (make-localactions)))))]
[(struct local-lift (expr id))
;; FIXME: seek in the lifted deriv, transplant subterm expansions *here*
(extract/remove-unvisited-lift id)]

4
collects/macro-debugger/model/synth-engine.ss
View File

@ -11,6 +11,7 @@
>>Prim
>>Seek
macro-policy
force-letrec-transformation
subterms-table
lifts-available
lifts-retained
@ -20,6 +21,9 @@
;; macro-policy : parameter of (identifier -> boolean)
(define macro-policy (make-parameter (lambda (id) #t)))
;; force-letrec-transformation : parameter of boolean
(define force-letrec-transformation (make-parameter #f))
;; subterms-table : parameter of hashtable[syntax => (list-of Path)]
(define subterms-table (make-parameter #f))