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31 lines
801 B
Racket
31 lines
801 B
Racket
#lang racket/base
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(provide make-debug-readtable wrap-reader)
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(require racket/syntax)
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(define (make-debug-readtable [rt (current-readtable)])
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(make-readtable rt
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#\^ 'dispatch-macro report-proc
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))
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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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