57 lines
2.0 KiB
Scheme
57 lines
2.0 KiB
Scheme
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(module warning mzscheme
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(require (lib "class.ss")
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(lib "mred.ss" "mred"))
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(provide warnings-frame%)
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;; warnings-frame%
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(define warnings-frame%
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(class frame%
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(super-new (label "Macro stepper warnings") (width 400) (height 300))
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(define text (new text% (auto-wrap #t)))
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(define ec (new editor-canvas% (parent this) (editor text)))
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(send text lock #t)
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(define -nonlinearity-text #f)
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(define -localactions-text #f)
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(define -lifts-text #f)
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(define/private (add-nonlinearity-text)
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(unless -nonlinearity-text
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(set! -nonlinearity-text #t)
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(add-text "An opaque macro duplicated one of its subterms. "
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"Macro hiding requires opaque macros to use their subterms linearly. "
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"The macro stepper is showing the expansion of that macro use.")))
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(define/private (add-localactions-text)
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(unless -localactions-text
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(set! -localactions-text #t)
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(add-text "An opaque macro called local-expand, syntax-local-lift-expression, "
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"etc. Macro hiding cannot currently handle local actions. "
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"The macro stepper is showing the expansion of that macro use.")))
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(define/private (add-lifts-text)
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(unless -lifts-text
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(set! -lifts-text #t)
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(add-text "A transparent macro called syntax-local-lift-expression or "
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"syntax-local-lift-module-end-declaration. "
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"The macro stepper is only hiding macro after the "
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"lifts are caught.")))
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(define/public (add-text . strs)
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(send text lock #f)
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(for-each (lambda (s) (send text insert s)) strs)
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(send text insert "\n\n")
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(send text lock #t))
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(define/public (add-warning tag)
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(case tag
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((nonlinearity)
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(add-nonlinearity-text))
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((localactions)
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(add-localactions-text))
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((lifts)
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(add-lifts-text))))
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(send this show #t)))
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) |