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17 lines
408 B
Racket
17 lines
408 B
Racket
#lang racket/base
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(provide report describe)
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; report the current value of the variable, then return it
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(define-syntax-rule (report var)
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(begin
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(displayln (format "~a = ~a" 'var var) (current-error-port))
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var))
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(require (prefix-in williams: (planet williams/describe/describe)))
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(define (describe x)
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(parameterize ([current-output-port (current-error-port)])
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(williams:describe x))
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x) |