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\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/interp dq.boot}
\author{The Axiom Team}
\maketitle
\begin{abstract}
\end{abstract}
\eject
\tableofcontents
\eject
\section{License}
<<license>>=
-- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical ALgorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@
<<*>>=
<<license>>
)package "BOOT"
-- Dequeue functions
-- dqUnit makes a unit dq i.e. a dq with one item, from the item
-- dqUnitCopy copies a unit dq
-- dqAppend appends 2 dq's, destroying the first
-- dqConcat concatenates a list of dq's, destroying all but the last
-- dqToList transforms a dq to a list
dqUnit s==(a:=[s];CONS(a,a))
dqUnitCopy s== dqUnit(CAAR s)
dqAppend(x,y)==
if null x
then y
else if null y
then x
else
RPLACD (CDR x,CAR y)
RPLACD (x, CDR y)
x
dqConcat ld==
if null ld
then nil
else if null rest ld
then first ld
else dqAppend(first ld,dqConcat rest ld)
dqToList s==if null s then nil else CAR s
dqAddAppend(x,y)==
if null x
then nil
else if null y
then nil
else
RPLACD (CDR x,CAR y)
RPLACD (x, CDR y)
x
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
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