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#lang racket/base
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(require (for-syntax racket/base racket/syntax))
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(provide (all-defined-out))
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(define-syntax (report stx)
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(syntax-case stx ()
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[(_ expr) #'(report expr expr)]
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[(_ expr name)
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#'(let ([expr-result expr])
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(eprintf "~a = ~v\n" 'name expr-result)
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expr-result)]))
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(define-syntax (report-datum stx)
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(syntax-case stx ()
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[(_ stx-expr) (with-syntax ([datum (syntax->datum #'stx-expr)])
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#'(report-datum stx-expr datum))]
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[(_ stx-expr name)
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#'(let ()
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(eprintf "~a = ~v\n" 'name (syntax->datum stx-expr))
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stx-expr)]))
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(define-syntax-rule (define-multi-version multi-name name)
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(define-syntax-rule (multi-name x (... ...))
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(begin (name x) (... ...))))
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(define-multi-version report* report)
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