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36 lines
1.9 KiB
Racket
36 lines
1.9 KiB
Racket
9 years ago
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#lang br
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(require (for-syntax br/syntax))
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(provide (all-defined-out))
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(define #'(introduce-scope _color . _parents)
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(with-syntax ([color #'_color]
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[color-string (format-string "~a" #'_color)]
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[color:define (suffix-id #'_color ":define")]
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[color:id (suffix-id #'_color ":id")]
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[color-binding-id (suffix-id #'_color "-binding-id")]
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[color-binding-form (suffix-id #'_color "-binding-form")]
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[color-id (suffix-id #'_color "-id")]
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[module-name (generate-temporary)]
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[parents (if (pair? (syntax->list #'_parents))
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(car (syntax->list #'_parents))
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(syntax->list #'_parents))])
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(replace-context #'_color
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#'(begin
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(module module-name br
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(require (for-syntax br/datum br/scope br/syntax))
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(provide (for-syntax (all-defined-out)) (all-defined-out))
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(begin-for-syntax
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(define-scope color parents))
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(define #'(color:define _id-in _expr)
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(inject-syntax* ([#'color:id (shared-syntax (prefix-id color-string ":" #'_id-in))]
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[#'color-binding-id (color-binding-form #'_id-in)]
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[#'color-id (color #'color-binding-id)])
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#'(begin
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(define color-binding-id _expr)
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(define-syntax color:id
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(syntax-id-rules ()
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[_ color-id]))))))
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(require 'module-name)))))
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