35 lines
926 B
Factor
35 lines
926 B
Factor
! Copyright (C) 2007 Daniel Ehrenberg.
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! See http://factorcode.org/license.txt for BSD license.
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USING: splitting grouping classes.tuple classes math kernel
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sequences arrays accessors ;
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IN: tuple-arrays
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TUPLE: tuple-array { seq read-only } { class read-only } ;
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: <tuple-array> ( length class -- tuple-array )
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[
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new tuple>array 1 tail
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[ <repetition> concat ] [ length ] bi <sliced-groups>
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] [ ] bi tuple-array boa ;
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M: tuple-array nth
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[ seq>> nth ] [ class>> ] bi prefix >tuple ;
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M: tuple-array set-nth ( elt n seq -- )
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>r >r tuple>array 1 tail r> r> seq>> set-nth ;
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M: tuple-array new-sequence
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class>> <tuple-array> ;
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: >tuple-array ( seq -- tuple-array )
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dup empty? [
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0 over first class <tuple-array> clone-like
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] unless ;
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M: tuple-array like
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drop dup tuple-array? [ >tuple-array ] unless ;
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M: tuple-array length seq>> length ;
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INSTANCE: tuple-array sequence
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