26 lines
542 B
Scheme
26 lines
542 B
Scheme
(define-library (picrin procedure)
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(import (scheme base))
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(export >>
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<<
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constant
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identity)
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(define identity values)
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(define (constant . args)
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(lambda _
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(apply values args)))
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(define (>> . fs)
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(if (null? fs)
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identity
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(let ((f (car fs))
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(g (apply >> (cdr fs))))
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(lambda args
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(call-with-values (lambda () (apply f args))
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(lambda args
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(apply g args)))))))
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(define (<< . fs)
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(apply >> (reverse fs))))
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