[Lazarus] How to write an eficient lexical scanner/parser?

Mehmet Erol Sanliturk m.e.sanliturk at gmail.com
Wed Mar 11 12:57:59 CET 2015

On Wed, Mar 11, 2015 at 2:38 AM, leledumbo <leledumbo_cool at yahoo.co.id>

> > However, I have a question: is there any article about 'how to write
> lexical parsers' using Object Pascal?
> First, you need to differentiate them correctly. Lexical scanner (or simply
> lexer) and parser, not lexical parser :)
> I've written some simple languages, generating GraphViz, LLVM or C code,
> using both self learning reference from the almighty Prof. Niklaus Wirth's
> articles, Jack Crenshaw's, the legendary dragon book and many others plus
> my
> compiler course in college.
> I really really suggest Prof. Niklaus Wirth's one
> (http://www.inf.ethz.ch/personal/wirth/, click the Compiler Construction
> link) as it's concise, simple, doesn't use stupid generator (i.e.: easy to
> implement by hand) while covering most important parts of the subject.
> While
> he didn't use or stress or even discourage the usage of abstract syntax
> tree, he did explain it that's good enough to understand.
> Here's what I've written in the past and is publicly available:
> - https://bitbucket.org/leledumbo/erd-maker (generates GraphViz code for
> visualization)
> - https://bitbucket.org/leledumbo/linguc (generates LLVM code that can be
> compiled as a library for a mathematically provable language focusing in
> database driven application)
> I don't use the direct code generation approach anymore as I found the
> abstract syntax tree to be usable for more than just code generation.
> --
> View this message in context:
> http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-How-to-write-an-eficient-lexical-scanner-parser-tp4041002p4041083.html
> Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com.
> --
> _______________________________________________

When there is NO license information in your repositories , this means that

"NO one can use them ."

with respect to copy right laws or conventions .

Thank you very much .

Mehmet Erol Sanliturk
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