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15 lines
290 B
Racket
15 lines
290 B
Racket
9 years ago
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#lang racket/base
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(require (for-syntax racket/base))
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(provide (all-defined-out))
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(define-syntax-rule (until cond expr ...)
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(let loop ()
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(unless cond
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expr ...
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(loop))))
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(define-syntax-rule (while cond expr ...)
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(let loop ()
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(when cond
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expr ...
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(loop))))
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