Lexer/Parser for Haskell in Haskell?

[Graeme Moss]

Has anyone written a parser for Haskell 1.4 in Haskell 1.4?  Or even
for a subset of Haskell 1.4?  I'm currently facing the daunting task
of doing so (admittedly only for a very small subset of Haskell).
Even just a lexer for Haskell (including the layout rule) would be
very helpful.

Has Happy (the parser generator) been upgraded to Haskell 1.3/1.4 yet?

Has any compiler written the lexer/parser in Haskell?

Cheers,

Graeme.