29 lines
920 B
Scheme
29 lines
920 B
Scheme
;;; Copyright (c) 1994 by Olin Shivers.
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;;; Handy for defining random flags and constants.
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;;; (define-enum-constant "errno" intr 9) => (define errno/intr 9)
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;;; Ugly, but it works.
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;;; The question: is / the best separator? Alternates: $ . |
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;;; (define-enum-constant fruit apple 1) =>
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;;; (define fruit/apple 1)
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(define-syntax define-enum-constant
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(lambda (form rename compare)
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(let ((%define (rename 'define))
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(var (string->symbol (string-append (symbol->string (cadr form)) "/"
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(symbol->string (caddr form)))))
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(value (cadddr form)))
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`(,%define ,var ,value))))
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;;; (define-enum-constants fruit (apple 1) (orange 2))
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;;; => (begin (define-enum-constant fruit apple 1)
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;;; (define-enum-constant fruit orange 2))
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(define-syntax define-enum-constants
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(syntax-rules ()
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((define-enum-constants set (elt val) ...)
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(begin (define-enum-constant set elt val) ...))))
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