Lexer in D

[David]

Am 02.03.2013 10:33, schrieb Namespace:
> For one of our courses this year we have a very cool topic: Lexer and
> Compiler.
> In the past I have already tried some experiments in this direction with
> Romulus and Remus, but I've never measured my Lexing time.
> That's why I wanted to start again to write a lexer (hitherto purely for
> the learning effect).
> I looked at the code of some of the other lexers, that are also written
> in D, to get some inspiration from, but currently my Lexer is a little
> bit slow, it requires for example ~200 msecs for std.datetime.
> So I wanted to ask whether there are nice people who help me to improve
> our lexer.
> 
> Code: https://github.com/Dgame/Puzzle/blob/master/lexer.d
> 
> Thanks in advance. :)

Making `types` and `keywords` an array might improve the speed a little bit:

if (id in types) -> if (types.canFind(id))
(same with keywords)