On Wednesday, March 09, 2011 09:28:05 Jacob Carlborg wrote: > On 9 mar 2011, at 05:52, Jonathan M Davis wrote: > > On Tuesday 08 March 2011 20:46:49 Andrei Alexandrescu wrote: > >> I understand. If I could, I'd kindly discourage you from working on it. > >> Its existence would stifle the impetus to work on general lexing and > >> parsing frameworks (a la highly integrated lex/yacc using D's > >> generational capabilities). Those in turn would push the compiler > >> forward and would help fixing bugs, and would offer the proverbial > >> fishing rod (tools for parsing any language) instead of fish (a lexer > >> and a parser for D itself). > > > > Well, I fully support a generic lexer, but I also see value in a lexer > > which closely follows what the front end is doing for D. But it's not > > like I've been making huge progress on it and am about to submit it for > > review. I have too much other stuff on my plate to blow through it like > > that. > > > > Though honestly, if I were to be writing a lexer and/or parser for a > > compiler of any kind, I'd just do it by hand. It's a lot more flexible > > that way. So, even if a solid, generic D lexing tool existed, I'm not > > sure that I'd use it for anything. > > > > In any case, as I understood it, the result of that original discussion > > was that we wanted to have a generic lexing solution (and presumably a > > corresponding parsing solution following that) but that we still want a > > lexer and parser for D which are close to what the C++ front end is > > doing. So, as requested, I've slowly been working on that. > > > > - Jonathan M Davis > > _______________________________________________ > > dmd-internals mailing list > > [email protected] > > http://lists.puremagic.com/mailman/listinfo/dmd-internals > > I completely agree with this, that we need a D lexer (preferably a whole > frontend) written in D, included in the standard library. I even hope that > one day DMD will use that lexer. > > BTW, are basing your work on DDMD?
No. I haven't looked at DDMD. Walter wanted a fairly direct port of the C++ frontend (with appropriate tweaks for D, but he wants to make sure that it's straightforward to port fixes from one to the other). So, I've just been directly, porting the C++ frontend, adjusting it to be somewhat more idiomatic D as appropriate but generally keeping it fairly close to the C++ implementation. - Jonathan M davis _______________________________________________ dmd-internals mailing list [email protected] http://lists.puremagic.com/mailman/listinfo/dmd-internals
