> 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 ERD 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. -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
