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\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/interp serror.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>>
--% Functions to handle specific errors (mostly syntax)
)package "BOOT"
syGeneralErrorHere() ==
sySpecificErrorHere('S2CY0002, [])
sySpecificErrorHere(key, args) ==
sySpecificErrorAtToken($stok, key, args)
sySpecificErrorAtToken(tok, key, args) ==
pos := tokPosn tok
ncSoftError(pos, key, args)
syIgnoredFromTo(pos1, pos2) ==
if pfGlobalLinePosn pos1 = pfGlobalLinePosn pos2 then
ncSoftError(FromTo(pos1,pos2), 'S2CY0005, [])
else
ncSoftError(From pos1, 'S2CY0003, [])
ncSoftError(To pos2, 'S2CY0004, [])
npMissingMate(close,open)==
ncSoftError(tokPosn open, 'S2CY0008, [])
npMissing close
npMissing s==
ncSoftError(tokPosn $stok,'S2CY0007, [PNAME s])
THROW("TRAPPOINT","TRAPPED")
npCompMissing s == npEqKey s or npMissing s
pfSourceStok x==
if pfLeaf? x
then x
else if null pfParts x
then 'NoToken
else pfSourceStok pfFirst x
npTrapForm(x)==
a:=pfSourceStok x
EQ(a,'NoToken)=>
syGeneralErrorHere()
THROW("TRAPPOINT","TRAPPED")
ncSoftError(tokPosn a, 'S2CY0002, [])
THROW("TRAPPOINT","TRAPPED")
npTrap()==
ncSoftError(tokPosn $stok,'S2CY0002,[])
THROW("TRAPPOINT","TRAPPED")
npRecoverTrap()==
npFirstTok()
pos1 := tokPosn $stok
npMoveTo 0
pos2 := tokPosn $stok
syIgnoredFromTo(pos1, pos2)
npPush [pfWrong(pfDocument ['"pile syntax error"],pfListOf [])]
npListAndRecover(f)==
a:=$stack
b:=nil
$stack:=nil
done:=false
c:=$inputStream
while not done repeat
found:=CATCH("TRAPPOINT",APPLY(f,nil))
if found="TRAPPED"
then
$inputStream:=c
npRecoverTrap()
else if not found
then
$inputStream:=c
syGeneralErrorHere()
npRecoverTrap()
if npEqKey "BACKSET"
then
c:=$inputStream
else if npEqPeek "BACKTAB"
then
done:=true
else
$inputStream:=c
syGeneralErrorHere()
npRecoverTrap()
if npEqPeek "BACKTAB"
then done:=true
else
npNext()
c:=$inputStream
b:=cons(npPop1(),b)
$stack:=a
npPush NREVERSE b
npMoveTo n==
if null $inputStream
then true
else
if npEqPeek "BACKTAB"
then if n=0
then true
else (npNext();npMoveTo(n-1))
else if npEqPeek "BACKSET"
then if n=0
then true
else (npNext();npMoveTo n)
else if npEqKey "SETTAB"
then npMoveTo(n+1)
else (npNext();npMoveTo n)
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
|
