10 lines
336 B
Factor
10 lines
336 B
Factor
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! Copyright (C) 2009 Jason W. Merrill.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel parser words effects accessors sequences
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math.ranges ;
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IN: math.derivatives.syntax
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: DERIVATIVE: scan-object dup stack-effect in>> length [1,b]
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[ drop scan-object ] map
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"derivative" set-word-prop ; parsing
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