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$prompt is now its own kind of CPS term.

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* module/language/cps.scm ($prompt): Rework to be its own term kind.
  Now $continue always continues to a single continuation.  Adapt
  callers.
This commit is contained in:
Andy Wingo 2018-01-03 17:17:23 +01:00
parent 29fee39c2a
commit ee15ca1455
22 changed files with 198 additions and 195 deletions
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21
module/language/cps/renumber.scm
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@ -87,16 +87,14 @@
(match (intmap-ref conts k)
(($ $kargs names syms term)
(match term
(($ $continue k src exp)
(match exp
(($ $prompt escape? tag handler)
(visit2 k handler order visited))
(_
(visit k order visited))))
(($ $continue k)
(visit k order visited))
(($ $branch kf kt)
(if (visit-kf-first? kf kt)
(visit2 kf kt order visited)
(visit2 kt kf order visited)))))
(visit2 kt kf order visited)))
(($ $prompt k kh)
(visit2 k kh order visited))))
(($ $kreceive arity k) (visit k order visited))
(($ $kclause arity kbody kalt)
(if kalt
@ -180,9 +178,7 @@
(($ $callk k proc args)
($callk (rename-label k) (rename-var proc) ,(map rename-var args)))
(($ $primcall name param args)
($primcall name param ,(map rename-var args)))
(($ $prompt escape? tag handler)
($prompt escape? (rename-var tag) (rename-label handler)))))
($primcall name param ,(map rename-var args)))))
(define (rename-arity arity)
(match arity
(($ $arity req opt rest () aok?)
@ -207,7 +203,10 @@
($continue (rename-label k) src ,(rename-exp exp)))
(($ $branch kf kt src op param args)
($branch (rename-label kf) (rename-label kt) src
op param ,(map rename-var args))))))
op param ,(map rename-var args)))
(($ $prompt k kh src escape? tag)
($prompt (rename-label k) (rename-label kh) src
escape? (rename-var tag))))))
(($ $kreceive ($ $arity req () rest () #f) k)
($kreceive req rest (rename-label k)))
(($ $ktail)