74 lines
2.5 KiB
Factor
74 lines
2.5 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2003, 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: lists
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USE: combinators
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USE: kernel
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USE: namespaces
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USE: stack
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: append@ ( [ list ] var -- )
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#! Append a proper list stored in a variable with another
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#! list, storing the result back in the variable.
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#! given variable using 'append'.
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tuck get swap append put ;
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: add@ ( elem var -- )
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#! Add an element at the end of a proper list stored in a
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#! variable, storing the result back in the variable.
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tuck get swap add put ;
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: cons@ ( x var -- )
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#! Prepend x to the list stored in var.
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tuck get cons put ;
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: remove@ ( obj var -- )
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#! Remove all occurrences of the object from the list
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#! stored in the variable.
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tuck get remove put ;
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: unique@ ( elem var -- )
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#! Prepend an element to the proper list stored in a
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#! variable if it is not already contained in the list.
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tuck get unique put ;
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: [, ( -- )
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#! Begin constructing a list.
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<namespace> >n f "list-buffer" set ;
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: , ( obj -- )
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#! Append an object to the currently constructing list.
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"list-buffer" cons@ ;
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: list, ( list -- )
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#! Append each element to the currently constructing list.
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[ , ] each ;
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: ,] ( -- list )
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#! Finish constructing a list and push it on the stack.
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"list-buffer" get nreverse n> drop ;
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