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@ -2,22 +2,27 @@
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(require (for-syntax racket/base syntax/parse racket/syntax syntax/datum syntax/strip-context))
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(provide (all-defined-out))
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;; a little tricky because we have to mix two levels of macrology.
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;; does not work with ellipses in the input pattern
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(define-syntax (br:debug-define stx)
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(syntax-parse stx
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#:literals (syntax)
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[(_ (syntax (id pat-arg ... . rest-arg)) body-exp) ; (define #'(foo arg) #'(+ arg arg))
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#'(define-syntax id (λ (stx)
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(define result (syntax-case stx ()
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[(_ pat-arg ... . rest-arg) body-exp]))
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(with-syntax ([syntaxed-result result]
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[context stx])
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#`(begin
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(displayln (format "input pattern = #'~a" (quote (id pat-arg ... . rest-arg))))
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(displayln (format "output pattern = #'~a" (syntax->datum body-exp)))
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(displayln (format "arg ~a = ~a" (quote pat-arg) 'zz)) ...
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#;(displayln stx)
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(displayln (format "expansion = ~a" 'syntaxed-result))
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(displayln (format "result = ~a" syntaxed-result))
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[(_ pat-arg ... . rest-arg)
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body-exp]))
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(define arg-printing (syntax-case stx ()
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[(_ pat-arg ... . rest-arg)
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#`(begin
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(displayln (format "arg #'~a = ~a" #,''pat-arg pat-arg)) ...)]))
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(with-syntax ([syntaxed-arg-printing arg-printing]
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[syntaxed-result result])
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#'(begin
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(displayln (format "input syntax = #'~a" (quote (id pat-arg ... . rest-arg))))
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(displayln (format "output syntax = #'~a" (syntax->datum body-exp)))
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syntaxed-arg-printing
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(displayln (format "expanded syntax = #'~a" 'syntaxed-result))
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syntaxed-result))))]))
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(define-syntax (br:define stx)
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