Parsing equations

parker@zilker.net (Patrick D. Parker)
22 Mar 1996 00:39:48 -0500

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Related articles
Parsing equations parker@zilker.net (1996-03-22)
Re: Parsing equations dwight@pentasoft.com (Dwight VandenBerghe) (1996-03-23)
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From: parker@zilker.net (Patrick D. Parker)
Newsgroups: comp.compilers
Date: 22 Mar 1996 00:39:48 -0500
Organization: The Magellan Group
Keywords: parse, question

I am looking for tools or examples to help implement a spreadsheet-like
equation parser for an internal application we need to write. We need to
handle arbitrary nesting and complexity... everything from


A1 + B1 / C1


to


((0.75 + RAND() * 0.5) * AVERAGE($A3:$A19)) / (1 + LN( MAX(C3:C19) ) )


[thanks to MS Excel for the syntax model]


The initial home for this will be on Macs using Metrowerks Codewarrior C++
and PowerPlant. I'm looking for lex and yacc tools, source code or class
library examples for share or purchase, or any other references. Thanks
for any help...


Patrick Parker
[It's certainly been done a thousand times, but it's be nice to have a
documented expression parser packaged up and ready to go. -John]


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