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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 $continue always continues to a single continuation.  Adapt
  callers.
This commit is contained in:
Andy Wingo 2018-01-03 17:17:23 +01:00
parent 29fee39c2a
commit ee15ca1455
22 changed files with 198 additions and 195 deletions
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9
module/language/cps/peel-loops.scm
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@ -142,16 +142,17 @@
(($ $callk k proc args)
($callk 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)))))
($primcall name param ,(map rename-var args)))))
(define (rename-term term)
(rewrite-term term
(($ $continue k src exp)
($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)))))
(rewrite-cont cont
(($ $kargs names vars term)
($kargs names (map rename-var vars) ,(rename-term term)))