! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2004 Slava Pestov.
! 
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions are met:
! 
! 1. Redistributions of source code must retain the above copyright notice,
!    this list of conditions and the following disclaimer.
! 
! 2. Redistributions in binary form must reproduce the above copyright notice,
!    this list of conditions and the following disclaimer in the documentation
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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IN: words
USE: kernel
USE: math
USE: namespaces
USE: strings
USE: unparser

SYMBOL: gensym-count

: (gensym) ( -- name )
    "G:" global [
        gensym-count [ succ dup ] change
    ] bind unparse cat2 ;

: gensym ( -- word )
    #! Return a word that is distinct from every other word, and
    #! is not contained in any vocabulary.
    (gensym) f (create) ;

global [ 0 gensym-count set ] bind