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|
{
module HaddockParse (parseParas, parseString) where
import HaddockLex
import HsSyn
}
%tokentype { Token }
%token '/' { TokSpecial '/' }
'@' { TokSpecial '@' }
'[' { TokDefStart }
']' { TokDefEnd }
DQUO { TokSpecial '\"' }
URL { TokURL $$ }
ANAME { TokAName $$ }
'-' { TokBullet }
'(n)' { TokNumber }
'>..' { TokBirdTrack $$ }
IDENT { TokIdent $$ }
PARA { TokPara }
STRING { TokString $$ }
%monad { Either String }
%name parseParas doc
%name parseString seq
%%
doc :: { Doc }
: apara PARA doc { docAppend $1 $3 }
| PARA doc { $2 }
| apara { $1 }
| {- empty -} { DocEmpty }
apara :: { Doc }
: ulpara { DocUnorderedList [$1] }
| olpara { DocOrderedList [$1] }
| defpara { DocDefList [$1] }
| para { $1 }
ulpara :: { Doc }
: '-' para { $2 }
olpara :: { Doc }
: '(n)' para { $2 }
defpara :: { (Doc,Doc) }
: '[' seq ']' seq { ($2, $4) }
para :: { Doc }
: seq { docParagraph $1 }
| codepara { DocCodeBlock $1 }
codepara :: { Doc }
: '>..' codepara { docAppend (DocString $1) $2 }
| '>..' { DocString $1 }
seq :: { Doc }
: elem seq { docAppend $1 $2 }
| elem { $1 }
elem :: { Doc }
: elem1 { $1 }
| '@' seq1 '@' { DocMonospaced $2 }
seq1 :: { Doc }
: elem1 seq1 { docAppend $1 $2 }
| elem1 { $1 }
elem1 :: { Doc }
: STRING { DocString $1 }
| '/' strings '/' { DocEmphasis (DocString $2) }
| URL { DocURL $1 }
| ANAME { DocAName $1 }
| IDENT { DocIdentifier $1 }
| DQUO strings DQUO { DocModule $2 }
strings :: { String }
: STRING { $1 }
| STRING strings { $1 ++ $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
}
|
