Viewing profile — thurston

Sorry I didn't see the parent you were responding too, so my point is actually the same as you already made. Thanks.

Ragel has the advantage that CPU blowups happen at compile time, rather than run-time. Other risks aside, they would have avoided this problem had they been using ragel or somethin…

What rarely gets discussed in this case was that old, working code was modified in a critical way in order to accommodate new code when that didn't need to be done at all. It was a…

Initial list: C, C++, Objective-C, Objective-C++, ASM, Crack, C#, D, Go, Java, JavaScript, Julia, OCaml, Ruby, Rust Others can be added.

Well doing that would mean ragel would incorrectly read one character, rather than run off forever. Personally I'd rather have the latter. Much easier to catch with memory checkers…

Author of Ragel here. An experienced Ragel programmer would know that when you start setting the EOF pointer you are enabling code paths that never executed before. Like, potential…

Thanks!

WRT Lua, not at this time, but it is one I would like to support. Won't be too much work to add it.

Keep using them is how you overcome this ;)

At their core they target different language classes. Ragel deals with regular, whereas LPeg deals with context-free grammars.

My pleasure, thank you for the note!

Not at this time. But yes Ragel 7 will make it much easier. The first round of new languages I added helped me polish the technique. Once 7 is out and vetted it will make sense to …

Same reason you would want to use yacc to write a parser. A grammar annotated with code is a nice way to express a parser. If the language happens to be regular, you can use ragel …

Ragel allows embedding actions into the subexpressions of a regular expression. This allows one to compose a parser using a single regular expression.

help me! http://www.complang.org/dsnp/

Just plain old text as it came in. I see now that is not what you were referring to. You're talking about JSON, XML, etc I now think. There is also a print_xml function, which puts…

They are related systems. DMS is much more mature.

Ya it's currently hard to find. http://d-cent.org/fsw2011/ I need help from people like you actually. What I've done. 1. defined the protocol 2. implmented it in a C++ daemon that …

Indeed I did not follow what you meant. I missed the "persistent" and saw ... "don't incur the cost of copying." I took that to mean that you were referring to not maintaining any …

Yes I understand these techniques, in fact they are heavily in use in Colm, just not for maintaining the global state that is used for the parsing feedback loop. I use the term "co…

:) If I had my way this comment would be closer to the top. Not many grammar-based parsing systems can claim raw DNS parsing.

Colm has built-in serialization. There is still some work to do in this area though. Colm will preserve whitespace for minimal disruption of untransformed text, but figuring out wh…

To have both generalized parsing and context dependent parsing you need to somehow revert changes to the global state when you backtrack. You can do this by restoring it to old ver…