51 lines
2.1 KiB
Factor
51 lines
2.1 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: kernel
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USE: vectors
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: 2drop ( x x -- ) drop drop ; inline
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: 3drop ( x x x -- ) drop drop drop ; inline
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: 2dup ( x y -- x y x y ) over over ; inline
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: 3dup ( x y z -- x y z x y z ) pick pick pick ; inline
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: rot ( x y z -- y z x ) >r swap r> swap ; inline
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: -rot ( x y z -- z x y ) swap >r swap r> ; inline
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: dupd ( x y -- x x y ) >r dup r> ; inline
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: swapd ( x y z -- y x z ) >r swap r> ; inline
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: nip ( x y -- y ) swap drop ; inline
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: tuck ( x y -- y x y ) dup >r swap r> ; inline
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: clear ( -- )
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#! Clear the datastack. For interactive use only; invoking
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#! this from a word definition will clobber any values left
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#! on the data stack by the caller.
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{ } set-datastack ;
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: depth ( -- n )
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#! Push the number of elements on the datastack.
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datastack vector-length ;
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