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\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/interp ptrop.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"
--% Utility operations on Abstract Syntax Trees
-- An S-expression which people can read.
pfSexpr pform ==
strip pform where
strip pform ==
pfId? pform => pfIdSymbol pform
pfLiteral? pform => pfLiteralString pform
pfLeaf? pform => tokPart pform
pfApplication? pform =>
args :=
a := pfApplicationArg pform
if pfTuple? a then pf0TupleParts a else [a]
[strip p for p in cons(pfApplicationOp pform, args)]
cons(pfAbSynOp pform, [strip p for p in pfParts pform])
pfCopyWithPos( pform , pos ) ==
pfLeaf? pform => pfLeaf( pfAbSynOp pform , tokPart pform , pos )
pfTree( pfAbSynOp pform , [ pfCopyWithPos( p , pos ) for p in pfParts pform ] )
pfMapParts(f, pform) ==
pfLeaf? pform => pform
parts0 := pfParts pform
parts1 := [FUNCALL(f, p) for p in parts0]
-- Return the original if no changes.
same := true
for p0 in parts0 for p1 in parts1 while same repeat same := EQ(p0,p1)
same => pform
pfTree(pfAbSynOp pform, parts1)
pf0ApplicationArgs pform ==
arg := pfApplicationArg pform
pf0FlattenSyntacticTuple arg
pf0FlattenSyntacticTuple pform ==
not pfTuple? pform => [pform]
[:pf0FlattenSyntacticTuple p for p in pf0TupleParts pform]
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
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