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56 lines
1.7 KiB
Racket
56 lines
1.7 KiB
Racket
#lang racket/base
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(require sugar/define)
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(require-via-wormhole "../typed/sugar/debug.rkt")
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(provide+safe report report/line report/file
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report* report*/line report*/file
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report-apply repeat time-repeat time-repeat* compare)
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(module* reader racket/base
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(require syntax/module-reader racket/syntax)
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(provide (rename-out [debug-read read]
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[debug-read-syntax read-syntax]
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[debug-get-info get-info]))
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(define (make-debug-readtable [rt (current-readtable)])
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(make-readtable rt #\^ 'dispatch-macro report-proc))
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(define/with-syntax report (datum->syntax #f 'report))
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(define/with-syntax report/line (datum->syntax #f 'report/line))
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(define (report-proc c in src ln col pos)
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(define c2 (peek-char in))
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(cond [(char=? c2 #\^)
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(read-char in)
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(define stx (read-syntax/recursive src in))
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#`(report/line #,stx)]
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[else
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(define stx (read-syntax/recursive src in))
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#`(report #,stx)]))
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(define (wrap-reader reader)
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(define (rd . args)
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(parameterize ([current-readtable (make-debug-readtable (current-readtable))])
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(apply reader args)))
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rd)
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(define-values (debug-read debug-read-syntax debug-get-info)
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(make-meta-reader
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'sugar/debug
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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) (vector `(submod ,sym 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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(define (fallback) (if proc (proc key defval) defval))
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(case key
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[else (fallback)])))))) |