36 lines
749 B
Factor
36 lines
749 B
Factor
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! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel assocs accessors ;
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IN: biassocs
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TUPLE: biassoc from to ;
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: <biassoc> ( exemplar -- biassoc )
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[ clone ] [ clone ] bi biassoc boa ;
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: <bihash> ( -- biassoc )
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H{ } <biassoc> ;
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M: biassoc assoc-size from>> assoc-size ;
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M: biassoc at* from>> at* ;
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M: biassoc value-at* to>> at* ;
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: once-at ( value key assoc -- )
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2dup key? [ 3drop ] [ set-at ] if ;
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M: biassoc set-at
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[ from>> set-at ] [ swapd to>> once-at ] 3bi ;
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M: biassoc delete-at
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"biassocs do not support deletion" throw ;
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M: biassoc >alist
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from>> >alist ;
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M: biassoc clear-assoc
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[ from>> clear-assoc ] [ to>> clear-assoc ] bi ;
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INSTANCE: biassoc assoc
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