! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2003, 2004 Slava Pestov.
! 
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! modification, are permitted provided that the following conditions are met:
! 
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!    this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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IN: vocabularies
USE: combinators
USE: kernel
USE: lists
USE: namespaces
USE: stack
USE: strings

: vocabs ( -- list )
    #! Push a list of vocabularies.
    global [ "vocabularies" get [ vars ] bind ] bind ;

: vocab ( name -- vocab )
    #! Get a vocabulary.
    global [ "vocabularies" get get* ] bind ;

: <vocab> ( name -- vocab )
    #! Create a vocabulary.
    <namespace> dup >r "vocabularies" get put* r> ;

: vocab* ( name -- vocab )
    #! Get a vocabulary, creating it if it doesn't exist.
    global [
        dup "vocabularies" get get* dup [
            nip
        ] [
            drop <vocab>
        ] ifte
    ] bind ;

: words ( vocab -- list )
    #! Push a list of all words in a vocabulary.
    vocab [ values ] bind ;

: intern ( "word" -- word )
    #! Returns the top of the stack if it already been interned.
    dup string? [ "use" get search ] when ;