28 lines
714 B
Factor
28 lines
714 B
Factor
! Copyright (C) 2008, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel sequences sequences.private arrays vectors fry
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math.order namespaces assocs ;
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IN: compiler.utilities
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: flattener ( seq quot -- seq vector quot' )
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over length <vector> [
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dup
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'[
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@ [
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dup array?
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[ _ push-all ] [ _ push ] if
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] when*
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]
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] keep ; inline
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: flattening ( seq quot combinator -- seq' )
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[ flattener ] dip dip { } like ; inline
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: map-flat ( seq quot -- seq' ) [ each ] flattening ; inline
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: 2map-flat ( seq quot -- seq' ) [ 2each ] flattening ; inline
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SYMBOL: yield-hook
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yield-hook [ [ ] ] initialize
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