Copyright	© 2015–2018 Megaparsec contributors
License	FreeBSD
Maintainer	Mark Karpov <markkarpov92@gmail.com>
Stability	experimental
Portability	portable
Safe Haskell	None
Language	Haskell2010

Text.Megaparsec.Pos

Contents

Abstract position
Source position

Description

Textual source position. The position includes name of file, line number, and column number. A non-empty list of such positions can be used to model a stack of include files.

You probably do not want to import this module directly because Text.Megaparsec re-exports it anyway.

Synopsis

data Pos
mkPos :: Int -> Pos
unPos :: Pos -> Int
pos1 :: Pos
defaultTabWidth :: Pos
newtype InvalidPosException = InvalidPosException Int
data SourcePos = SourcePos {
- sourceName :: FilePath
- sourceLine :: !Pos
- sourceColumn :: !Pos
}
initialPos :: FilePath -> SourcePos
sourcePosPretty :: SourcePos -> String

Abstract position

data Pos Source #

Pos is the type for positive integers. This is used to represent line number, column number, and similar things like indentation level. Semigroup instance can be used to safely and efficiently add Poses together.

Since: megaparsec-5.0.0

Instances

Eq Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods (==) :: Pos -> Pos -> Bool # (/=) :: Pos -> Pos -> Bool #
Data Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Pos -> c Pos # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Pos # toConstr :: Pos -> Constr # dataTypeOf :: Pos -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Pos) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Pos) # gmapT :: (forall b. Data b => b -> b) -> Pos -> Pos # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Pos -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Pos -> r # gmapQ :: (forall d. Data d => d -> u) -> Pos -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Pos -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Pos -> m Pos # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Pos -> m Pos # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Pos -> m Pos #
Ord Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods compare :: Pos -> Pos -> Ordering # (<) :: Pos -> Pos -> Bool # (<=) :: Pos -> Pos -> Bool # (>) :: Pos -> Pos -> Bool # (>=) :: Pos -> Pos -> Bool # max :: Pos -> Pos -> Pos # min :: Pos -> Pos -> Pos #
Read Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods readsPrec :: Int -> ReadS Pos # readList :: ReadS [Pos] # readPrec :: ReadPrec Pos # readListPrec :: ReadPrec [Pos] #
Show Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods showsPrec :: Int -> Pos -> ShowS # show :: Pos -> String # showList :: [Pos] -> ShowS #
Semigroup Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods (<>) :: Pos -> Pos -> Pos # sconcat :: NonEmpty Pos -> Pos # stimes :: Integral b => b -> Pos -> Pos #
NFData Pos Source #
Instance details Defined in Text.Megaparsec.Pos Methods rnf :: Pos -> () #

mkPos :: Int -> Pos Source #

Construction of Pos from Int. The function throws InvalidPosException when given a non-positive argument.

Since: megaparsec-6.0.0

unPos :: Pos -> Int Source #

Extract Int from Pos.

Since: megaparsec-6.0.0

pos1 :: Pos Source #

Position with value 1.

Since: megaparsec-6.0.0

defaultTabWidth :: Pos Source #

Value of tab width used by default. Always prefer this constant when you want to refer to the default tab width because actual value may change in future.

Since: megaparsec-5.0.0

newtype InvalidPosException Source #

The exception is thrown by mkPos when its argument is not a positive number.

Since: megaparsec-5.0.0

Constructors

InvalidPosException Int

The first value is the minimal allowed value, the second value is the actual value that was passed to mkPos.

Instances

Eq InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos Methods (==) :: InvalidPosException -> InvalidPosException -> Bool # (/=) :: InvalidPosException -> InvalidPosException -> Bool #
Data InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> InvalidPosException -> c InvalidPosException # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c InvalidPosException # toConstr :: InvalidPosException -> Constr # dataTypeOf :: InvalidPosException -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c InvalidPosException) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c InvalidPosException) # gmapT :: (forall b. Data b => b -> b) -> InvalidPosException -> InvalidPosException # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> InvalidPosException -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> InvalidPosException -> r # gmapQ :: (forall d. Data d => d -> u) -> InvalidPosException -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> InvalidPosException -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> InvalidPosException -> m InvalidPosException # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> InvalidPosException -> m InvalidPosException # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> InvalidPosException -> m InvalidPosException #
Show InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos Methods showsPrec :: Int -> InvalidPosException -> ShowS # show :: InvalidPosException -> String # showList :: [InvalidPosException] -> ShowS #
Generic InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos Associated Types type Rep InvalidPosException :: * -> * # Methods from :: InvalidPosException -> Rep InvalidPosException x # to :: Rep InvalidPosException x -> InvalidPosException #
Exception InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos Methods toException :: InvalidPosException -> SomeException # fromException :: SomeException -> Maybe InvalidPosException # displayException :: InvalidPosException -> String #
NFData InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos Methods rnf :: InvalidPosException -> () #
type Rep InvalidPosException Source #
Instance details Defined in Text.Megaparsec.Pos type Rep InvalidPosException = D1 (MetaData "InvalidPosException" "Text.Megaparsec.Pos" "megaparsec-7.0.1-77sfZZNjGw2eV3pH4TyUf" True) (C1 (MetaCons "InvalidPosException" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int)))

Source position

data SourcePos Source #

The data type SourcePos represents source positions. It contains the name of the source file, a line number, and a column number. Source line and column positions change intensively during parsing, so we need to make them strict to avoid memory leaks.

Constructors

SourcePos
Fields sourceName :: FilePath Name of source file sourceLine :: !Pos Line number sourceColumn :: !Pos Column number

Instances

Eq SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Methods (==) :: SourcePos -> SourcePos -> Bool # (/=) :: SourcePos -> SourcePos -> Bool #
Data SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> SourcePos -> c SourcePos # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c SourcePos # toConstr :: SourcePos -> Constr # dataTypeOf :: SourcePos -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c SourcePos) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SourcePos) # gmapT :: (forall b. Data b => b -> b) -> SourcePos -> SourcePos # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> SourcePos -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> SourcePos -> r # gmapQ :: (forall d. Data d => d -> u) -> SourcePos -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> SourcePos -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> SourcePos -> m SourcePos # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> SourcePos -> m SourcePos # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> SourcePos -> m SourcePos #
Ord SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Methods compare :: SourcePos -> SourcePos -> Ordering # (<) :: SourcePos -> SourcePos -> Bool # (<=) :: SourcePos -> SourcePos -> Bool # (>) :: SourcePos -> SourcePos -> Bool # (>=) :: SourcePos -> SourcePos -> Bool # max :: SourcePos -> SourcePos -> SourcePos # min :: SourcePos -> SourcePos -> SourcePos #
Read SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Methods readsPrec :: Int -> ReadS SourcePos # readList :: ReadS [SourcePos] # readPrec :: ReadPrec SourcePos # readListPrec :: ReadPrec [SourcePos] #
Show SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Methods showsPrec :: Int -> SourcePos -> ShowS # show :: SourcePos -> String # showList :: [SourcePos] -> ShowS #
Generic SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Associated Types type Rep SourcePos :: * -> * # Methods from :: SourcePos -> Rep SourcePos x # to :: Rep SourcePos x -> SourcePos #
NFData SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos Methods rnf :: SourcePos -> () #
type Rep SourcePos Source #
Instance details Defined in Text.Megaparsec.Pos type Rep SourcePos = D1 (MetaData "SourcePos" "Text.Megaparsec.Pos" "megaparsec-7.0.1-77sfZZNjGw2eV3pH4TyUf" False) (C1 (MetaCons "SourcePos" PrefixI True) (S1 (MetaSel (Just "sourceName") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 FilePath) :: (S1 (MetaSel (Just "sourceLine") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Pos) :: S1 (MetaSel (Just "sourceColumn") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Pos))))

initialPos :: FilePath -> SourcePos Source #

Construct initial position (line 1, column 1) given name of source file.

sourcePosPretty :: SourcePos -> String Source #

Pretty-print a SourcePos.

Since: megaparsec-5.0.0