37 lines
1.1 KiB
Racket
37 lines
1.1 KiB
Racket
(module reader scheme/base
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(require syntax/module-reader
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(only-in scribble/reader make-at-readtable))
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(provide (rename-out [at-read read]
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[at-read-syntax read-syntax]
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[at-get-info get-info]))
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(define at-readtable (make-at-readtable))
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(define (wrap-reader p)
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(lambda args
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(parameterize ([current-readtable at-readtable])
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(apply p args))))
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(define-values (at-read at-read-syntax at-get-info)
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(make-meta-reader
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'at-exp
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"language path"
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(lambda (bstr)
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(let* ([str (bytes->string/latin-1 bstr)]
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[sym (string->symbol str)])
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(and (module-path? sym)
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(vector
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;; try submod first:
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`(submod ,sym reader)
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;; fall back to /lang/reader:
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(string->symbol (string-append str "/lang/reader"))))))
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wrap-reader
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wrap-reader
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(lambda (proc)
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(lambda (key defval)
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(case key
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[(color-lexer)
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(dynamic-require 'syntax-color/scribble-lexer 'scribble-lexer)]
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[else (if proc (proc key defval) defval)]))))))
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