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|
{
module HaddockParse (parseParas, parseString) where
import HaddockLex
import HaddockTypes
}
%tokentype { Token }
%token SQUO { TokSpecial '\'' }
BQUO { TokSpecial '`' }
DQUO { TokSpecial '\"' }
'/' { TokSpecial '/' }
'@' { TokSpecial '@' }
URL { TokURL $$ }
'*' { TokBullet }
'(n)' { TokNumber }
'>' { TokBirdTrack }
PARA { TokPara }
STRING { TokString $$ }
%monad { Either String }
%name parseParas doc
%name parseString seq
%%
doc :: { ParsedDoc }
: apara PARA doc { docAppend $1 $3 }
| PARA doc { $2 }
| apara { $1 }
| {- empty -} { DocEmpty }
apara :: { ParsedDoc }
: ulpara { DocUnorderedList [$1] }
| olpara { DocOrderedList [$1] }
| para { $1 }
ulpara :: { ParsedDoc }
: '*' para { $2 }
olpara :: { ParsedDoc }
: '(n)' para { $2 }
para :: { ParsedDoc }
: seq { docParagraph $1 }
| codepara { DocCodeBlock $1 }
codepara :: { ParsedDoc }
: '>' seq codepara { docAppend $2 $3 }
| '>' seq { $2 }
seq :: { ParsedDoc }
: elem seq { docAppend $1 $2 }
| elem { $1 }
elem :: { ParsedDoc }
: STRING { DocString $1 }
| '/' STRING '/' { DocEmphasis (DocString $2) }
| URL { DocURL $1 }
| SQUO STRING SQUO { DocIdentifier $2 }
| BQUO STRING SQUO { DocIdentifier $2 }
| DQUO STRING DQUO { DocModule $2 }
| '@' seq1 '@' { DocMonospaced $2 }
seq1 :: { ParsedDoc }
: elem1 seq1 { docAppend $1 $2 }
| elem1 { $1 }
elem1 :: { ParsedDoc }
: STRING { DocString $1 }
| '/' STRING '/' { DocEmphasis (DocString $2) }
| URL { DocURL $1 }
| SQUO STRING SQUO { DocIdentifier $2 }
| BQUO STRING SQUO { DocIdentifier $2 }
| DQUO STRING DQUO { DocModule $2 }
{
happyError :: [Token] -> Either String a
happyError toks =
Left ("parse error in doc string: " ++ show (take 3 toks))
-- Either monad (we can't use MonadError because GHC < 5.00 has
-- an older incompatible version).
instance Monad (Either String) where
return = Right
Left l >>= _ = Left l
Right r >>= k = k r
fail msg = Left msg
}
|
