{-# LANGUAGE CPP #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PatternGuards #-}
module Distribution.Fields.Parser (
Field(..),
Name(..),
FieldLine(..),
SectionArg(..),
readFields,
readFields',
#ifdef CABAL_PARSEC_DEBUG
parseFile,
parseStr,
parseBS,
#endif
) where
import qualified Data.ByteString.Char8 as B8
import Data.Functor.Identity
import Distribution.Compat.Prelude
import Distribution.Fields.Field
import Distribution.Fields.Lexer
import Distribution.Fields.LexerMonad
(LexResult (..), LexState (..), LexWarning (..), unLex)
import Distribution.Parsec.Position (Position (..))
import Prelude ()
import Text.Parsec.Combinator hiding (eof, notFollowedBy)
import Text.Parsec.Error
import Text.Parsec.Pos
import Text.Parsec.Prim hiding (many, (<|>))
#ifdef CABAL_PARSEC_DEBUG
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.Text.Encoding.Error as T
#endif
data LexState' = LexState' !LexState (LToken, LexState')
mkLexState' :: LexState -> LexState'
mkLexState' :: LexState -> LexState'
mkLexState' LexState
st = LexState -> (LToken, LexState') -> LexState'
LexState' LexState
st
(case Lex LToken -> LexState -> LexResult LToken
forall a. Lex a -> LexState -> LexResult a
unLex Lex LToken
lexToken LexState
st of LexResult LexState
st' LToken
tok -> (LToken
tok, LexState -> LexState'
mkLexState' LexState
st'))
type Parser a = ParsecT LexState' () Identity a
instance Stream LexState' Identity LToken where
uncons :: LexState' -> Identity (Maybe (LToken, LexState'))
uncons (LexState' LexState
_ (LToken
tok, LexState'
st')) =
case LToken
tok of
L Position
_ Token
EOF -> Maybe (LToken, LexState') -> Identity (Maybe (LToken, LexState'))
forall a. a -> Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe (LToken, LexState')
forall a. Maybe a
Nothing
LToken
_ -> Maybe (LToken, LexState') -> Identity (Maybe (LToken, LexState'))
forall a. a -> Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return ((LToken, LexState') -> Maybe (LToken, LexState')
forall a. a -> Maybe a
Just (LToken
tok, LexState'
st'))
getLexerWarnings :: Parser [LexWarning]
getLexerWarnings :: Parser [LexWarning]
getLexerWarnings = do
LexState' (LexState { warnings :: LexState -> [LexWarning]
warnings = [LexWarning]
ws }) (LToken, LexState')
_ <- ParsecT LexState' () Identity LexState'
forall (m :: * -> *) s u. Monad m => ParsecT s u m s
getInput
[LexWarning] -> Parser [LexWarning]
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return [LexWarning]
ws
setLexerMode :: Int -> Parser ()
setLexerMode :: Int -> Parser ()
setLexerMode Int
code = do
LexState' LexState
ls (LToken, LexState')
_ <- ParsecT LexState' () Identity LexState'
forall (m :: * -> *) s u. Monad m => ParsecT s u m s
getInput
LexState' -> Parser ()
forall (m :: * -> *) s u. Monad m => s -> ParsecT s u m ()
setInput (LexState' -> Parser ()) -> LexState' -> Parser ()
forall a b. (a -> b) -> a -> b
$! LexState -> LexState'
mkLexState' LexState
ls { curCode = code }
getToken :: (Token -> Maybe a) -> Parser a
getToken :: forall a. (Token -> Maybe a) -> Parser a
getToken Token -> Maybe a
getTok = (LToken -> Maybe a) -> Parser a
forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos (\(L Position
_ Token
t) -> Token -> Maybe a
getTok Token
t)
getTokenWithPos :: (LToken -> Maybe a) -> Parser a
getTokenWithPos :: forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos LToken -> Maybe a
getTok = (LToken -> [Char])
-> (SourcePos -> LToken -> LexState' -> SourcePos)
-> (LToken -> Maybe a)
-> ParsecT LexState' () Identity a
forall s (m :: * -> *) t a u.
Stream s m t =>
(t -> [Char])
-> (SourcePos -> t -> s -> SourcePos)
-> (t -> Maybe a)
-> ParsecT s u m a
tokenPrim (\(L Position
_ Token
t) -> Token -> [Char]
describeToken Token
t) SourcePos -> LToken -> LexState' -> SourcePos
updatePos LToken -> Maybe a
getTok
where
updatePos :: SourcePos -> LToken -> LexState' -> SourcePos
updatePos :: SourcePos -> LToken -> LexState' -> SourcePos
updatePos SourcePos
pos (L (Position Int
col Int
line) Token
_) LexState'
_ = [Char] -> Int -> Int -> SourcePos
newPos (SourcePos -> [Char]
sourceName SourcePos
pos) Int
col Int
line
describeToken :: Token -> String
describeToken :: Token -> [Char]
describeToken Token
t = case Token
t of
TokSym ByteString
s -> [Char]
"symbol " [Char] -> [Char] -> [Char]
forall a. [a] -> [a] -> [a]
++ ByteString -> [Char]
forall a. Show a => a -> [Char]
show ByteString
s
TokStr ByteString
s -> [Char]
"string " [Char] -> [Char] -> [Char]
forall a. [a] -> [a] -> [a]
++ ByteString -> [Char]
forall a. Show a => a -> [Char]
show ByteString
s
TokOther ByteString
s -> [Char]
"operator " [Char] -> [Char] -> [Char]
forall a. [a] -> [a] -> [a]
++ ByteString -> [Char]
forall a. Show a => a -> [Char]
show ByteString
s
Indent Int
_ -> [Char]
"new line"
TokFieldLine ByteString
_ -> [Char]
"field content"
Token
Colon -> [Char]
"\":\""
Token
OpenBrace -> [Char]
"\"{\""
Token
CloseBrace -> [Char]
"\"}\""
Token
EOF -> [Char]
"end of file"
LexicalError ByteString
is -> [Char]
"character in input " [Char] -> [Char] -> [Char]
forall a. [a] -> [a] -> [a]
++ Char -> [Char]
forall a. Show a => a -> [Char]
show (ByteString -> Char
B8.head ByteString
is)
tokSym :: Parser (Name Position)
tokSym', tokStr, tokOther :: Parser (SectionArg Position)
tokIndent :: Parser Int
tokColon, tokOpenBrace, tokCloseBrace :: Parser ()
tokFieldLine :: Parser (FieldLine Position)
tokSym :: Parser (Name Position)
tokSym = (LToken -> Maybe (Name Position)) -> Parser (Name Position)
forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos ((LToken -> Maybe (Name Position)) -> Parser (Name Position))
-> (LToken -> Maybe (Name Position)) -> Parser (Name Position)
forall a b. (a -> b) -> a -> b
$ \LToken
t -> case LToken
t of L Position
pos (TokSym ByteString
x) -> Name Position -> Maybe (Name Position)
forall a. a -> Maybe a
Just (Position -> ByteString -> Name Position
forall ann. ann -> ByteString -> Name ann
mkName Position
pos ByteString
x); LToken
_ -> Maybe (Name Position)
forall a. Maybe a
Nothing
tokSym' :: Parser (SectionArg Position)
tokSym' = (LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position)
forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos ((LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position))
-> (LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position)
forall a b. (a -> b) -> a -> b
$ \LToken
t -> case LToken
t of L Position
pos (TokSym ByteString
x) -> SectionArg Position -> Maybe (SectionArg Position)
forall a. a -> Maybe a
Just (Position -> ByteString -> SectionArg Position
forall ann. ann -> ByteString -> SectionArg ann
SecArgName Position
pos ByteString
x); LToken
_ -> Maybe (SectionArg Position)
forall a. Maybe a
Nothing
tokStr :: Parser (SectionArg Position)
tokStr = (LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position)
forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos ((LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position))
-> (LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position)
forall a b. (a -> b) -> a -> b
$ \LToken
t -> case LToken
t of L Position
pos (TokStr ByteString
x) -> SectionArg Position -> Maybe (SectionArg Position)
forall a. a -> Maybe a
Just (Position -> ByteString -> SectionArg Position
forall ann. ann -> ByteString -> SectionArg ann
SecArgStr Position
pos ByteString
x); LToken
_ -> Maybe (SectionArg Position)
forall a. Maybe a
Nothing
tokOther :: Parser (SectionArg Position)
tokOther = (LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position)
forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos ((LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position))
-> (LToken -> Maybe (SectionArg Position))
-> Parser (SectionArg Position)
forall a b. (a -> b) -> a -> b
$ \LToken
t -> case LToken
t of L Position
pos (TokOther ByteString
x) -> SectionArg Position -> Maybe (SectionArg Position)
forall a. a -> Maybe a
Just (Position -> ByteString -> SectionArg Position
forall ann. ann -> ByteString -> SectionArg ann
SecArgOther Position
pos ByteString
x); LToken
_ -> Maybe (SectionArg Position)
forall a. Maybe a
Nothing
tokIndent :: Parser Int
tokIndent = (Token -> Maybe Int) -> Parser Int
forall a. (Token -> Maybe a) -> Parser a
getToken ((Token -> Maybe Int) -> Parser Int)
-> (Token -> Maybe Int) -> Parser Int
forall a b. (a -> b) -> a -> b
$ \Token
t -> case Token
t of Indent Int
x -> Int -> Maybe Int
forall a. a -> Maybe a
Just Int
x; Token
_ -> Maybe Int
forall a. Maybe a
Nothing
tokColon :: Parser ()
tokColon = (Token -> Maybe ()) -> Parser ()
forall a. (Token -> Maybe a) -> Parser a
getToken ((Token -> Maybe ()) -> Parser ())
-> (Token -> Maybe ()) -> Parser ()
forall a b. (a -> b) -> a -> b
$ \Token
t -> case Token
t of Token
Colon -> () -> Maybe ()
forall a. a -> Maybe a
Just (); Token
_ -> Maybe ()
forall a. Maybe a
Nothing
tokOpenBrace :: Parser ()
tokOpenBrace = (Token -> Maybe ()) -> Parser ()
forall a. (Token -> Maybe a) -> Parser a
getToken ((Token -> Maybe ()) -> Parser ())
-> (Token -> Maybe ()) -> Parser ()
forall a b. (a -> b) -> a -> b
$ \Token
t -> case Token
t of Token
OpenBrace -> () -> Maybe ()
forall a. a -> Maybe a
Just (); Token
_ -> Maybe ()
forall a. Maybe a
Nothing
tokCloseBrace :: Parser ()
tokCloseBrace = (Token -> Maybe ()) -> Parser ()
forall a. (Token -> Maybe a) -> Parser a
getToken ((Token -> Maybe ()) -> Parser ())
-> (Token -> Maybe ()) -> Parser ()
forall a b. (a -> b) -> a -> b
$ \Token
t -> case Token
t of Token
CloseBrace -> () -> Maybe ()
forall a. a -> Maybe a
Just (); Token
_ -> Maybe ()
forall a. Maybe a
Nothing
tokFieldLine :: Parser (FieldLine Position)
tokFieldLine = (LToken -> Maybe (FieldLine Position))
-> Parser (FieldLine Position)
forall a. (LToken -> Maybe a) -> Parser a
getTokenWithPos ((LToken -> Maybe (FieldLine Position))
-> Parser (FieldLine Position))
-> (LToken -> Maybe (FieldLine Position))
-> Parser (FieldLine Position)
forall a b. (a -> b) -> a -> b
$ \LToken
t -> case LToken
t of L Position
pos (TokFieldLine ByteString
s) -> FieldLine Position -> Maybe (FieldLine Position)
forall a. a -> Maybe a
Just (Position -> ByteString -> FieldLine Position
forall ann. ann -> ByteString -> FieldLine ann
FieldLine Position
pos ByteString
s); LToken
_ -> Maybe (FieldLine Position)
forall a. Maybe a
Nothing
colon, openBrace, closeBrace :: Parser ()
sectionArg :: Parser (SectionArg Position)
sectionArg :: Parser (SectionArg Position)
sectionArg = Parser (SectionArg Position)
tokSym' Parser (SectionArg Position)
-> Parser (SectionArg Position) -> Parser (SectionArg Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> Parser (SectionArg Position)
tokStr Parser (SectionArg Position)
-> Parser (SectionArg Position) -> Parser (SectionArg Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> Parser (SectionArg Position)
tokOther Parser (SectionArg Position)
-> [Char] -> Parser (SectionArg Position)
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"section parameter"
fieldSecName :: Parser (Name Position)
fieldSecName :: Parser (Name Position)
fieldSecName = Parser (Name Position)
tokSym Parser (Name Position) -> [Char] -> Parser (Name Position)
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"field or section name"
colon :: Parser ()
colon = Parser ()
tokColon Parser () -> [Char] -> Parser ()
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"\":\""
openBrace :: Parser ()
openBrace = Parser ()
tokOpenBrace Parser () -> [Char] -> Parser ()
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"\"{\""
closeBrace :: Parser ()
closeBrace = Parser ()
tokCloseBrace Parser () -> [Char] -> Parser ()
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"\"}\""
fieldContent :: Parser (FieldLine Position)
fieldContent :: Parser (FieldLine Position)
fieldContent = Parser (FieldLine Position)
tokFieldLine Parser (FieldLine Position)
-> [Char] -> Parser (FieldLine Position)
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"field contents"
newtype IndentLevel = IndentLevel Int
zeroIndentLevel :: IndentLevel
zeroIndentLevel :: IndentLevel
zeroIndentLevel = Int -> IndentLevel
IndentLevel Int
0
incIndentLevel :: IndentLevel -> IndentLevel
incIndentLevel :: IndentLevel -> IndentLevel
incIndentLevel (IndentLevel Int
i) = Int -> IndentLevel
IndentLevel (Int -> Int
forall a. Enum a => a -> a
succ Int
i)
indentOfAtLeast :: IndentLevel -> Parser IndentLevel
indentOfAtLeast :: IndentLevel -> Parser IndentLevel
indentOfAtLeast (IndentLevel Int
i) = Parser IndentLevel -> Parser IndentLevel
forall s u (m :: * -> *) a. ParsecT s u m a -> ParsecT s u m a
try (Parser IndentLevel -> Parser IndentLevel)
-> Parser IndentLevel -> Parser IndentLevel
forall a b. (a -> b) -> a -> b
$ do
Int
j <- Parser Int
tokIndent
Bool -> Parser ()
forall (f :: * -> *). Alternative f => Bool -> f ()
guard (Int
j Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>= Int
i) Parser () -> [Char] -> Parser ()
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"indentation of at least " [Char] -> [Char] -> [Char]
forall a. [a] -> [a] -> [a]
++ Int -> [Char]
forall a. Show a => a -> [Char]
show Int
i
IndentLevel -> Parser IndentLevel
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Int -> IndentLevel
IndentLevel Int
j)
newtype LexerMode = LexerMode Int
inLexerMode :: LexerMode -> Parser p -> Parser p
inLexerMode :: forall p. LexerMode -> Parser p -> Parser p
inLexerMode (LexerMode Int
mode) Parser p
p =
do Int -> Parser ()
setLexerMode Int
mode; p
x <- Parser p
p; Int -> Parser ()
setLexerMode Int
in_section; p -> Parser p
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return p
x
cabalStyleFile :: Parser [Field Position]
cabalStyleFile :: Parser [Field Position]
cabalStyleFile = do [Field Position]
es <- IndentLevel -> Parser [Field Position]
elements IndentLevel
zeroIndentLevel
Parser ()
eof
[Field Position] -> Parser [Field Position]
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return [Field Position]
es
elements :: IndentLevel -> Parser [Field Position]
elements :: IndentLevel -> Parser [Field Position]
elements IndentLevel
ilevel = ParsecT LexState' () Identity (Field Position)
-> Parser [Field Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
many (IndentLevel -> ParsecT LexState' () Identity (Field Position)
element IndentLevel
ilevel)
element :: IndentLevel -> Parser (Field Position)
element :: IndentLevel -> ParsecT LexState' () Identity (Field Position)
element IndentLevel
ilevel =
(do IndentLevel
ilevel' <- IndentLevel -> Parser IndentLevel
indentOfAtLeast IndentLevel
ilevel
Name Position
name <- Parser (Name Position)
fieldSecName
IndentLevel
-> Name Position -> ParsecT LexState' () Identity (Field Position)
elementInLayoutContext (IndentLevel -> IndentLevel
incIndentLevel IndentLevel
ilevel') Name Position
name)
ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> (do Name Position
name <- Parser (Name Position)
fieldSecName
Name Position -> ParsecT LexState' () Identity (Field Position)
elementInNonLayoutContext Name Position
name)
elementInLayoutContext :: IndentLevel -> Name Position -> Parser (Field Position)
elementInLayoutContext :: IndentLevel
-> Name Position -> ParsecT LexState' () Identity (Field Position)
elementInLayoutContext IndentLevel
ilevel Name Position
name =
(do Parser ()
colon; IndentLevel
-> Name Position -> ParsecT LexState' () Identity (Field Position)
fieldLayoutOrBraces IndentLevel
ilevel Name Position
name)
ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> (do [SectionArg Position]
args <- Parser (SectionArg Position)
-> ParsecT LexState' () Identity [SectionArg Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
many Parser (SectionArg Position)
sectionArg
[Field Position]
elems <- IndentLevel -> Parser [Field Position]
sectionLayoutOrBraces IndentLevel
ilevel
Field Position -> ParsecT LexState' () Identity (Field Position)
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Name Position
-> [SectionArg Position] -> [Field Position] -> Field Position
forall ann.
Name ann -> [SectionArg ann] -> [Field ann] -> Field ann
Section Name Position
name [SectionArg Position]
args [Field Position]
elems))
elementInNonLayoutContext :: Name Position -> Parser (Field Position)
elementInNonLayoutContext :: Name Position -> ParsecT LexState' () Identity (Field Position)
elementInNonLayoutContext Name Position
name =
(do Parser ()
colon; Name Position -> ParsecT LexState' () Identity (Field Position)
fieldInlineOrBraces Name Position
name)
ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> (do [SectionArg Position]
args <- Parser (SectionArg Position)
-> ParsecT LexState' () Identity [SectionArg Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
many Parser (SectionArg Position)
sectionArg
Parser ()
openBrace
[Field Position]
elems <- IndentLevel -> Parser [Field Position]
elements IndentLevel
zeroIndentLevel
Parser Int -> Parser ()
forall s (m :: * -> *) t u a.
Stream s m t =>
ParsecT s u m a -> ParsecT s u m ()
optional Parser Int
tokIndent
Parser ()
closeBrace
Field Position -> ParsecT LexState' () Identity (Field Position)
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Name Position
-> [SectionArg Position] -> [Field Position] -> Field Position
forall ann.
Name ann -> [SectionArg ann] -> [Field ann] -> Field ann
Section Name Position
name [SectionArg Position]
args [Field Position]
elems))
fieldLayoutOrBraces :: IndentLevel -> Name Position -> Parser (Field Position)
fieldLayoutOrBraces :: IndentLevel
-> Name Position -> ParsecT LexState' () Identity (Field Position)
fieldLayoutOrBraces IndentLevel
ilevel Name Position
name = ParsecT LexState' () Identity (Field Position)
braces ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> ParsecT LexState' () Identity (Field Position)
fieldLayout
where
braces :: ParsecT LexState' () Identity (Field Position)
braces = do
Parser ()
openBrace
[FieldLine Position]
ls <- LexerMode
-> Parser [FieldLine Position] -> Parser [FieldLine Position]
forall p. LexerMode -> Parser p -> Parser p
inLexerMode (Int -> LexerMode
LexerMode Int
in_field_braces) (Parser (FieldLine Position) -> Parser [FieldLine Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
many Parser (FieldLine Position)
fieldContent)
Parser ()
closeBrace
Field Position -> ParsecT LexState' () Identity (Field Position)
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Name Position -> [FieldLine Position] -> Field Position
forall ann. Name ann -> [FieldLine ann] -> Field ann
Field Name Position
name [FieldLine Position]
ls)
fieldLayout :: ParsecT LexState' () Identity (Field Position)
fieldLayout = LexerMode
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall p. LexerMode -> Parser p -> Parser p
inLexerMode (Int -> LexerMode
LexerMode Int
in_field_layout) (ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position))
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall a b. (a -> b) -> a -> b
$ do
Maybe (FieldLine Position)
l <- Parser (FieldLine Position)
-> ParsecT LexState' () Identity (Maybe (FieldLine Position))
forall s (m :: * -> *) t u a.
Stream s m t =>
ParsecT s u m a -> ParsecT s u m (Maybe a)
optionMaybe Parser (FieldLine Position)
fieldContent
[FieldLine Position]
ls <- Parser (FieldLine Position) -> Parser [FieldLine Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
many (do IndentLevel
_ <- IndentLevel -> Parser IndentLevel
indentOfAtLeast IndentLevel
ilevel; Parser (FieldLine Position)
fieldContent)
Field Position -> ParsecT LexState' () Identity (Field Position)
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Field Position -> ParsecT LexState' () Identity (Field Position))
-> Field Position -> ParsecT LexState' () Identity (Field Position)
forall a b. (a -> b) -> a -> b
$ case Maybe (FieldLine Position)
l of
Maybe (FieldLine Position)
Nothing -> Name Position -> [FieldLine Position] -> Field Position
forall ann. Name ann -> [FieldLine ann] -> Field ann
Field Name Position
name [FieldLine Position]
ls
Just FieldLine Position
l' -> Name Position -> [FieldLine Position] -> Field Position
forall ann. Name ann -> [FieldLine ann] -> Field ann
Field Name Position
name (FieldLine Position
l' FieldLine Position -> [FieldLine Position] -> [FieldLine Position]
forall a. a -> [a] -> [a]
: [FieldLine Position]
ls)
sectionLayoutOrBraces :: IndentLevel -> Parser [Field Position]
sectionLayoutOrBraces :: IndentLevel -> Parser [Field Position]
sectionLayoutOrBraces IndentLevel
ilevel =
(do Parser ()
openBrace
[Field Position]
elems <- IndentLevel -> Parser [Field Position]
elements IndentLevel
zeroIndentLevel
Parser Int -> Parser ()
forall s (m :: * -> *) t u a.
Stream s m t =>
ParsecT s u m a -> ParsecT s u m ()
optional Parser Int
tokIndent
Parser ()
closeBrace
[Field Position] -> Parser [Field Position]
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return [Field Position]
elems)
Parser [Field Position]
-> Parser [Field Position] -> Parser [Field Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> (IndentLevel -> Parser [Field Position]
elements IndentLevel
ilevel)
fieldInlineOrBraces :: Name Position -> Parser (Field Position)
fieldInlineOrBraces :: Name Position -> ParsecT LexState' () Identity (Field Position)
fieldInlineOrBraces Name Position
name =
(do Parser ()
openBrace
[FieldLine Position]
ls <- LexerMode
-> Parser [FieldLine Position] -> Parser [FieldLine Position]
forall p. LexerMode -> Parser p -> Parser p
inLexerMode (Int -> LexerMode
LexerMode Int
in_field_braces) (Parser (FieldLine Position) -> Parser [FieldLine Position]
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
many Parser (FieldLine Position)
fieldContent)
Parser ()
closeBrace
Field Position -> ParsecT LexState' () Identity (Field Position)
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Name Position -> [FieldLine Position] -> Field Position
forall ann. Name ann -> [FieldLine ann] -> Field ann
Field Name Position
name [FieldLine Position]
ls))
ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
-> ParsecT LexState' () Identity (Field Position)
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> (do [FieldLine Position]
ls <- LexerMode
-> Parser [FieldLine Position] -> Parser [FieldLine Position]
forall p. LexerMode -> Parser p -> Parser p
inLexerMode (Int -> LexerMode
LexerMode Int
in_field_braces) ([FieldLine Position]
-> Parser [FieldLine Position] -> Parser [FieldLine Position]
forall s (m :: * -> *) t a u.
Stream s m t =>
a -> ParsecT s u m a -> ParsecT s u m a
option [] ((FieldLine Position -> [FieldLine Position])
-> Parser (FieldLine Position) -> Parser [FieldLine Position]
forall a b.
(a -> b)
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (\FieldLine Position
l -> [FieldLine Position
l]) Parser (FieldLine Position)
fieldContent))
Field Position -> ParsecT LexState' () Identity (Field Position)
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return (Name Position -> [FieldLine Position] -> Field Position
forall ann. Name ann -> [FieldLine ann] -> Field ann
Field Name Position
name [FieldLine Position]
ls))
readFields :: B8.ByteString -> Either ParseError [Field Position]
readFields :: ByteString -> Either ParseError [Field Position]
readFields ByteString
s = (([Field Position], [LexWarning]) -> [Field Position])
-> Either ParseError ([Field Position], [LexWarning])
-> Either ParseError [Field Position]
forall a b. (a -> b) -> Either ParseError a -> Either ParseError b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ([Field Position], [LexWarning]) -> [Field Position]
forall a b. (a, b) -> a
fst (ByteString -> Either ParseError ([Field Position], [LexWarning])
readFields' ByteString
s)
readFields' :: B8.ByteString -> Either ParseError ([Field Position], [LexWarning])
readFields' :: ByteString -> Either ParseError ([Field Position], [LexWarning])
readFields' ByteString
s = do
Parsec LexState' () ([Field Position], [LexWarning])
-> [Char]
-> LexState'
-> Either ParseError ([Field Position], [LexWarning])
forall s t a.
Stream s Identity t =>
Parsec s () a -> [Char] -> s -> Either ParseError a
parse Parsec LexState' () ([Field Position], [LexWarning])
parser [Char]
"the input" LexState'
lexSt
where
parser :: Parsec LexState' () ([Field Position], [LexWarning])
parser = do
[Field Position]
fields <- Parser [Field Position]
cabalStyleFile
[LexWarning]
ws <- Parser [LexWarning]
getLexerWarnings
([Field Position], [LexWarning])
-> Parsec LexState' () ([Field Position], [LexWarning])
forall a. a -> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ([Field Position]
fields, [LexWarning]
ws)
lexSt :: LexState'
lexSt = LexState -> LexState'
mkLexState' (ByteString -> LexState
mkLexState ByteString
s)
#ifdef CABAL_PARSEC_DEBUG
parseTest' :: Show a => Parsec LexState' () a -> SourceName -> B8.ByteString -> IO ()
parseTest' p fname s =
case parse p fname (lexSt s) of
Left err -> putStrLn (formatError s err)
Right x -> print x
where
lexSt = mkLexState' . mkLexState
parseFile :: Show a => Parser a -> FilePath -> IO ()
parseFile p f = B8.readFile f >>= \s -> parseTest' p f s
parseStr :: Show a => Parser a -> String -> IO ()
parseStr p = parseBS p . B8.pack
parseBS :: Show a => Parser a -> B8.ByteString -> IO ()
parseBS p = parseTest' p "<input string>"
formatError :: B8.ByteString -> ParseError -> String
formatError input perr =
unlines
[ "Parse error "++ show (errorPos perr) ++ ":"
, errLine
, indicator ++ errmsg ]
where
pos = errorPos perr
ls = lines' (T.decodeUtf8With T.lenientDecode input)
errLine = T.unpack (ls !! (sourceLine pos - 1))
indicator = replicate (sourceColumn pos) ' ' ++ "^"
errmsg = showErrorMessages "or" "unknown parse error"
"expecting" "unexpected" "end of file"
(errorMessages perr)
lines' :: T.Text -> [T.Text]
lines' s1
| T.null s1 = []
| otherwise = case T.break (\c -> c == '\r' || c == '\n') s1 of
(l, s2) | Just (c,s3) <- T.uncons s2
-> case T.uncons s3 of
Just ('\n', s4) | c == '\r' -> l : lines' s4
_ -> l : lines' s3
| otherwise -> [l]
#endif
eof :: Parser ()
eof :: Parser ()
eof = Parser LToken -> Parser ()
notFollowedBy Parser LToken
forall s (m :: * -> *) t u.
(Stream s m t, Show t) =>
ParsecT s u m t
anyToken Parser () -> [Char] -> Parser ()
forall s u (m :: * -> *) a.
ParsecT s u m a -> [Char] -> ParsecT s u m a
<?> [Char]
"end of file"
where
notFollowedBy :: Parser LToken -> Parser ()
notFollowedBy :: Parser LToken -> Parser ()
notFollowedBy Parser LToken
p = Parser () -> Parser ()
forall s u (m :: * -> *) a. ParsecT s u m a -> ParsecT s u m a
try ( (do L Position
_ Token
t <- Parser LToken -> Parser LToken
forall s u (m :: * -> *) a. ParsecT s u m a -> ParsecT s u m a
try Parser LToken
p; [Char] -> Parser ()
forall s (m :: * -> *) t u a.
Stream s m t =>
[Char] -> ParsecT s u m a
unexpected (Token -> [Char]
describeToken Token
t))
Parser () -> Parser () -> Parser ()
forall a.
ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
-> ParsecT LexState' () Identity a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> () -> Parser ()
forall a. a -> ParsecT LexState' () Identity a
forall (m :: * -> *) a. Monad m => a -> m a
return ())