Re: [Haskell-cafe] monadic parser with Happy and Alex

Duncan Coutts ha scritto:

[...]

...

Now I'm starting to write the parser with Happy, however for the final product I would like to: 1) Be able to do I/O in the lexer, for stylesheets inclusion (@import rule) 2) be able to keep state in the parser (or lexer?), for character transcoding (@charset rule)

This should be possible with Happy (and there are some example), however I don't find examples that make use of a lexer written with Alex.

See c2hs or Language.C it uses a monadic lexer.

Thanks. I'm also looking at HJS (unfortunately new versions use Parsec instead of Alex + Happy).

Duncan

Manlio