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|
(define-module (language python for)
#:use-module (oop pf-objects)
#:use-module (ice-9 control)
#:export (for break))
(eval-when (compile eval load)
(define (generate-temporaries2 x)
(map (lambda (x) (generate-temporaries x)) x)))
(define-syntax-parameter break (lambda (x) #f))
(define-syntax for
(lambda (x)
(syntax-case x (:)
((for ((x ... : E) ...) ((c n) ...) code ... #:final fin)
(with-syntax (((It ...) (generate-temporaries #'(E ...)))
((cc ...) (generate-temporaries #'(c ...)))
(((x1 ...) ...) (generate-temporaries2 #'((x ...) ...)))
(((x2 ...) ...) (generate-temporaries2 #'((x ...) ...))))
#'(let/ec lp-break
(syntax-parameterize ((break (lambda (z)
(syntax-case z ()
((_ . l)
#'(lp-break . l))
(_ #'lp-break)))))
(let ((It E) ... (c n) ... (x 'None) ... ... (x1 #f) ... ...)
(catch StopIteration
(lambda ()
(let lp ((cc c) ...)
(set! c cc) ...
(call-with-values
(lambda () (next It))
(lambda (x2 ...)
(set! x1 x2) ...))
...
(set! x x1)
... ...
(call-with-values
(lambda () code ...)
lp)))
(lambda q fin)))))))
((for ((x ... : E) ...) ((c n) ...) code ...)
(with-syntax (((It ...) (generate-temporaries #'(E ...)))
((cc ...) (generate-temporaries #'(c ...)))
(((x1 ...) ...) (generate-temporaries2 #'((x ...) ...)))
(((x2 ...) ...) (generate-temporaries2 #'((x ...) ...))))
#'(let/ec lp-break
(syntax-parameterize ((break (lambda (z)
(syntax-case z ()
((_ . l)
#'(lp-break . l))
(_ #'lp-break)))))
(let ((It E) ... (c n) ... (x 'None) ... ... (x1 #f) ... ...)
(catch StopIteration
(lambda ()
(let lp ((cc c) ...)
(set! c cc) ...
(call-with-values
(lambda () (next It))
(lambda (x2 ...)
(set! x1 x2) ...))
...
(set! x x1)
... ...
(call-with-values
(lambda () code ...)
lp)))
(lambda q (values))))))))
((for lp ((x ... : E) ...) ((c n) ...) code ... #:final fin)
(with-syntax (((It ...) (generate-temporaries #'(E ...)))
((cc ...) (generate-temporaries #'(c ...)))
(((x1 ...) ...) (generate-temporaries2 #'((x ...) ...)))
(((x2 ...) ...) (generate-temporaries2 #'((x ...) ...))))
#'(let/ec lp-break
(syntax-parameterize ((break (lambda (z)
(syntax-case z ()
((_ . l)
#'(lp-break . l))
(_ #'lp-break)))))
(let ((It E) ... (c n) ... (x 'None) ... ... (x1 #f) ... ...)
(catch StopIteration
(lambda ()
(let lp ((cc c) ...)
(set! c cc) ...
(call-with-values
(lambda () (next It))
(lambda (x2 ...)
(set! x1 x2) ...))
...
(set! x x1)
... ...
(call-with-values
(lambda () (let/ec lp code ...))
lp)))
(lambda q fin)))))))
((for lp ((x ... : E) ...) ((c n) ...) code ...)
(with-syntax (((It ...) (generate-temporaries #'(E ...)))
((cc ...) (generate-temporaries #'(c ...)))
(((x1 ...) ...) (generate-temporaries2 #'((x ...) ...)))
(((x2 ...) ...) (generate-temporaries2 #'((x ...) ...))))
#'(let/ec lp-break
(syntax-parameterize ((break (lambda (z)
(syntax-case z ()
((_ . l)
#'(lp-break . l))
(_ #'lp-break)))))
(let ((It E) ... (c n) ... (x 'None) ... ... (x1 #f) ... ...)
(catch StopIteration
(lambda ()
(let lp ((cc c) ...)
(set! c cc) ...
(call-with-values
(lambda () (next It))
(lambda (x2 ...)
(set! x1 x2) ...))
...
(set! x x1)
... ...
(call-with-values
(lambda () (let/ec lp code ...))
lp)))
(lambda q (values)))))))))))
#;
(pk
(for c ((x : (gen '(1 2 3)))) ((s 0))
(pk x)
(if (> x 2) (c s))
(+ s x)
#:final
s))
|
