19 lines
510 B
Racket
19 lines
510 B
Racket
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(module utils mzscheme
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;; Generative structure definitions:
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(define-struct dt (pred-stx variants))
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(define-struct vt (name-stx predicate-stx accessor-stx field-count))
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;; Helper function:
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(define (variant-assq name-stx variants)
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(let loop ([l variants])
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(if (module-identifier=? name-stx
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(vt-name-stx (car l)))
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(car l)
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(loop (cdr l)))))
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(provide (struct dt (pred-stx variants))
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(struct vt (name-stx predicate-stx accessor-stx field-count))
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variant-assq))
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