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This commit is contained in:
Matthew Butterick 2016-05-15 14:48:24 -07:00
parent 32a14d78af
commit 3af79f911f
2 changed files with 25 additions and 24 deletions
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30
beautiful-racket-lib/br/subscope.rkt
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@ -2,18 +2,18 @@
(provide (all-defined-out))
(define #'(introduce-scope _color . _parents)
(replace-context #'_color
(with-syntax ([color #'_color]
[color-string (format "~a" (syntax->datum #'_color))]
[define:color (format-id #f "define:~a" #'_color)]
[id:color (format-id #f "id:~a" #'_color)]
[color-binding-id (format-id #f "~a-binding-id" #'_color)]
[color-binding-form (format-id #f "~a-binding-form" #'_color)]
[color-id (format-id #f "~a-id" #'_color)]
[module-name (generate-temporary)]
[parents (if (pair? (syntax->list #'_parents))
(car (syntax->list #'_parents))
(syntax->list #'_parents))])
(with-syntax ([color #'_color]
[color-string (format "~a" (syntax->datum #'_color))]
[color:define (format-id #f "~a:define" #'_color)]
[color:id (format-id #f "~a:id" #'_color)]
[color-binding-id (format-id #f "~a-binding-id" #'_color)]
[color-binding-form (format-id #f "~a-binding-form" #'_color)]
[color-id (format-id #f "~a-id" #'_color)]
[module-name (generate-temporary)]
[parents (if (pair? (syntax->list #'_parents))
(car (syntax->list #'_parents))
(syntax->list #'_parents))])
(replace-context #'_color
#'(begin
(module module-name br
(require (for-syntax br/datum br/syntax))
@ -22,13 +22,13 @@
(begin-for-syntax
(define-scope color parents))
(define #'(define:color _id-in _expr)
(with-syntax* ([id:color (shared-syntax (format-datum "~a:~a" #'_id-in color-string))]
(define #'(color:define _id-in _expr)
(with-syntax* ([color:id (shared-syntax (format-datum "~a:~a" color-string #'_id-in))]
[color-binding-id (color-binding-form #'_id-in)]
[color-id (color #'color-binding-id)])
#'(begin
(define color-binding-id _expr)
(define-syntax id:color
(define-syntax color:id
(syntax-id-rules ()
[_ color-id]))))))
(require 'module-name)))))

19
beautiful-racket-lib/br/syntax-scopes-test-3.rkt
View File

@ -4,18 +4,19 @@
(introduce-scope blue)
(introduce-scope red)
#;(introduce-scope purple (red blue))
(define #'(double-x)
(with-blue-identifiers (x)
#'(+ x x)))
#'(set! x (+ x x))))
(define #'(display-x)
(with-blue-identifiers (x)
#'(displayln x)))
(define:blue x 50)
x:blue
(blue:define x 42)
(define:red x 42)
x:red
blue:x
(double-x)
(double-x)
(display-x)