David Waern wrote:
> 2008/5/8 Simon Marlow <
marlowsd@...>:
>> So basically you want to run a lexer over the source again to collect all
>> the comments?
>
> Yes.
>
>> You really want to use GHC's lexer, because otherwise you
>> have to write another lexer.
>
> I don't mind writing a lexer that just collects the comments. It
> should be simpler than a full Haskell lexer, right? It wouldn't need
> to handle layout, for instance. Using GHC is also a good option.
I'm not sure it's that much easier to write a lexer that just collects
comments. For example, is there a comment here?
3#--foo
with -XMagicHash it is (3# followed by a comment), but without -XMagicHash
it is not (3 followed by the operator #--). You have to implement a
significant chunk of the options that GHC supports to get it right. I'd
say its probably easier to work with GHC's lexer.
Cheers,
Simon
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