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fix in letcc compiler; call/cc redefined via letcc

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ESL 2023-03-11 12:28:51 -05:00
parent 25fa48c928
commit 6f009ba30a
5 changed files with 563 additions and 540 deletions
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1028
k.c
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File diff suppressed because it is too large Load diff

8
s.c
View file

@ -1721,8 +1721,12 @@ char *s_code[] = {
"rgs;;;l2:y1:_;y15:%25residual-apply;;",
"call/cc",
"l4:y12:syntax-rules;n;l2:py1:_;y4:args;;py4:%25ccc;y4:args;;;l2:y1:_;y"
"4:%25ccc;;",
"l5:y12:syntax-rules;n;l2:l2:y1:_;y1:f;;l3:y5:letcc;y1:k;l2:y1:f;y1:k;;"
";;l2:py1:_;y12:syntax-rules;;py17:%25residual-call/cc;y12:syntax-rules"
";;;l2:y1:_;y17:%25residual-call/cc;;",
0,
"&0{%1k1,.0,.2[21}@!(y17:%25residual-call/cc)",
"call-with-current-continuation",
"l4:y12:syntax-rules;n;l2:py1:_;y4:args;;py7:call/cc;y4:args;;;l2:y1:_;"

13
src/k.sf
View file

@ -977,32 +977,33 @@
(when k (write-char #\] port) (write-serialized-arg k port))]
[letcc (kid exp)
(let* ([ids (list kid)] [sets (find-sets exp ids)]
[news (set-union (set-minus s ids) sets)]
[newl (cons kid l)])
[news (set-union (set-minus s ids) sets)])
(cond [k ; tail position with k locals on stack to be disposed of
(write-char #\k port) (write-serialized-arg k port)
(write-char #\, port)
(when (set-member? kid sets)
(write-char #\# port) (write-char #\0 port))
(codegen exp newl f news g (fx+ k 1) port)]
; stack map here: kid on top
(codegen exp (cons kid l) f news g (fx+ k 1) port)]
[else ; non-tail position
(write-char #\$ port) (write-char #\{ port)
(write-char #\k port) (write-char #\0 port)
(write-char #\, port)
(when (set-member? kid sets)
(write-char #\# port) (write-char #\0 port))
(codegen exp newl f news g #f port)
; stack map here: kid on top, two-slot frame under it
(codegen exp (cons kid (cons #f (cons #f l))) f news g #f port)
(write-char #\_ port) (write-serialized-arg 3 port)
(write-char #\} port)]))]
[withcc (kexp exp)
(cond [(memq (car exp) '(quote ref lambda)) ; exp is a constant, return it
(codegen exp l f s g #f port)
(write-char #\, port)
(write-char #\, port) ; stack map after: k on top
(codegen kexp (cons #f l) f s g #f port)
(write-char #\w port) (write-char #\! port)]
[else ; exp is not a constant, thunk it and call it from k
(codegen (list 'lambda '() exp) l f s g #f port)
(write-char #\, port)
(write-char #\, port) ; stack map after: k on top
(codegen kexp (cons #f l) f s g #f port)
(write-char #\w port)])]
[call (exp . args)

2
src/s.scm
View file

@ -759,7 +759,7 @@
[(_ . args) (%residual-apply . args)]
[_ %residual-apply]))
(define-syntax call/cc %ccc)
(define-inline (call/cc f) %residual-call/cc (letcc k (f k)))
(define-syntax call-with-current-continuation call/cc)

52
t.c
View file

@ -276,32 +276,32 @@ char *t_code[] = {
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"?{:0]1}:1^[10}.!0${.3,@(y3:id?)[01}?{${.3,:2^[01}?{${.4,@(y3:id?)[01}?"
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0,
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