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42 lines
1.1 KiB
Racket
42 lines
1.1 KiB
Racket
#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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#'(begin
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(displayln (format "~a = ~v" 'name expr) (current-error-port))
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expr)]))
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(define-syntax (report* stx)
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(syntax-case stx ()
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[(_ expr ...) (datum->syntax stx `(begin ,@(map (λ(arg) `(report ,arg)) (syntax->datum #'(expr ...)))))]))
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(define-syntax-rule (repeat num expr ...)
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(for/last ([i (in-range num)])
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expr ...))
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(define-syntax-rule (time-repeat num expr ...)
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(time (repeat num expr ...)))
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(define-syntax (time-repeat* stx)
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(syntax-case stx ()
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[(_ num expr ...)
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(let ([num (syntax->datum #'num)])
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(datum->syntax stx `(values ,@(map (λ(arg) `(time-repeat ,num ,arg)) (syntax->datum #'(expr ...))))))]))
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(define-syntax (compare stx)
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(syntax-case stx ()
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[(_ expr id id-alts ...)
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(let ([expr (syntax->datum #'expr)]
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[id (syntax->datum #'id)])
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(datum->syntax stx `(values ,expr ,@(map (λ(id-alt) `(let ([,id ,id-alt]) ,expr)) (syntax->datum #'(id-alts ...))))))]))
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