34 lines
1.1 KiB
Racket
34 lines
1.1 KiB
Racket
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(module old-ds '#%kernel
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(#%require "define-struct.rkt"
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(for-syntax '#%kernel
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"stxcase-scheme.rkt"))
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(#%provide define-struct let-struct datum)
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(define-syntaxes (define-struct)
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(lambda (stx)
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(with-syntax ([orig stx])
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(syntax-case stx ()
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[(_ base (field ...))
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#'(define-struct/derived orig base (field ...) #:mutable)]
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[(_ base (field ...) insp)
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(with-syntax ([insp
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(if (keyword? (syntax-e #'insp))
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(datum->syntax #'insp
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(cons '#%datum #'insp)
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#'insp)
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#'insp)])
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#'(define-struct/derived orig base (field ...) #:mutable #:inspector insp))]))))
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(define-syntaxes (let-struct)
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(syntax-rules ()
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[(_ base (field ...) body1 body ...)
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(let-values ()
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(define-struct base (field ...))
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body1 body ...)]))
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(define-syntaxes (datum)
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(syntax-rules ()
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[(_ . any) (quote any)])))
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