Feedback From Users

2012  "I'm evaluating LRSTAR (also learning TBNF) ... LSTAR seems quite professionally built ... much more flexible than bison/yacc ... About parser+lexer speed I'm literally impressed.  I'm finding this kind of parser and compiler generator suitable for parsers that I'm working on (high-speed server-side processing) ... it works great for my purpose even on 64-bit machines with Linux and Mac OS X Lion (compiled in Xcode LLVM-Clang and GCC) and also with Intel CPP compiler."
Vasko Mitanov, Software R&D Department Manager at Skopski Pazar

2012  "Many thanks for DFAC ... I used to use flex/bison for my DSLs.  I'm working on a project which requires the fastest possible lexer/scanner for DSL (part of my web-server).  I can get it only with LRSTAR/DFASTAR/DFAC.  In my opinion TBNF is the best grammar notation I've ever seen."
Sergey Kuritsin

2011  "I just happened upon your very high quality lexer and parser generators. Firstly, I'm really impressed with the capabilities ... I've toyed a bit with Bison/Yacc, and in my opinion, yours is far superior ... I am finding LRSTAR particularly easy to use and quite powerful ... The ability to build the AST and have the parser generated from a skeleton really makes things easy for me ... I am getting an insane number of lines per second [parsing speed], in the numerous hundreds of thousands ... I've yet to encounter an actual bug in LRSTAR or DFASTAR."
Bill Hart, Warwick University

2011  "I really like the LRSTAR tool ... [compared to yacc/bison] I prefer the simplicity of LRSTAR ... I did a re-write using [another parser generator], but the speed of their parser is at least an order of magnitude slower than LRSTAR [parsers] which was quite surprising ... I am certain you have a good, maybe even a great product."
Sidney Worth, Active Education

2009  "I used your LALR tool for developing a Verilog parser around 1991.  I remember that the generated parser was extremely fast."
Eli Sternheim, InterHDL

2005  "The TBNF notation used for translations is the most concise notation that I have ever seen implemented in a tool, still remarkably powerful."
Ralf Lammel, Koblenz University

2005  "We are still using your LALR product [since 1991].  It's a little secret that we don't want our competitors to know about."
Anonymous

1999  "We used your LALR product to build the compiler in Lotus Notes [in 1993] and it's been very successful ... over 135,000,000 users."
Kevin Jackson, IBM Software Group

1991  "I recommended that we use your LALR product for all internal language-development efforts."
Ken Allen, Information Builders

1985  "LALR 1.0 ... Unbelievably fast ... able to handle huge grammars."
Daryl Rubin, a review published by Computer Language Magazine