Text.Megaparsec.Pos

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.

Abstract position

data Pos

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: 5.0.0

Instances

Eq Pos

Defined in Text.Megaparsec.Pos

Methods

(==) :: Pos -> Pos -> Bool

(/=) :: Pos -> Pos -> Bool

Data Pos

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

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

Defined in Text.Megaparsec.Pos

Methods

readsPrec :: Int -> ReadS Pos

readList :: ReadS [Pos]

readPrec :: ReadPrec Pos

readListPrec :: ReadPrec [Pos]

Show Pos

Defined in Text.Megaparsec.Pos

Methods

showsPrec :: Int -> Pos -> ShowS

show :: Pos -> String

showList :: [Pos] -> ShowS

Semigroup Pos

Defined in Text.Megaparsec.Pos

Methods

(<>) :: Pos -> Pos -> Pos

sconcat :: NonEmpty Pos -> Pos

stimes :: Integral b => b -> Pos -> Pos

NFData Pos

Defined in Text.Megaparsec.Pos

Methods

rnf :: Pos -> ()

mkPos :: Int -> Pos

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

Since: 6.0.0

unPos :: Pos -> Int

Extract Int from Pos.

Since: 6.0.0

pos1 :: Pos

Position with value 1.

Since: 6.0.0

defaultTabWidth :: Pos

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: 5.0.0

newtype InvalidPosException

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

Since: 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

Defined in Text.Megaparsec.Pos

Methods

(==) :: InvalidPosException -> InvalidPosException -> Bool

(/=) :: InvalidPosException -> InvalidPosException -> Bool

Data InvalidPosException

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

Defined in Text.Megaparsec.Pos

Methods

showsPrec :: Int -> InvalidPosException -> ShowS

show :: InvalidPosException -> String

showList :: [InvalidPosException] -> ShowS

Generic InvalidPosException

Defined in Text.Megaparsec.Pos

Associated Types

type Rep InvalidPosException :: Type -> Type

Methods

from :: InvalidPosException -> Rep InvalidPosException x

to :: Rep InvalidPosException x -> InvalidPosException

Exception InvalidPosException

Defined in Text.Megaparsec.Pos

Methods

toException :: InvalidPosException -> SomeException

fromException :: SomeException -> Maybe InvalidPosException

displayException :: InvalidPosException -> String

NFData InvalidPosException

Defined in Text.Megaparsec.Pos

Methods

rnf :: InvalidPosException -> ()

type Rep InvalidPosException

Defined in Text.Megaparsec.Pos

type Rep InvalidPosException = D1 (MetaData "InvalidPosException" "Text.Megaparsec.Pos" "megaparsec-7.0.3-33us1Wj7Xo51sKKEffQvN7" True) (C1 (MetaCons "InvalidPosException" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int)))

Source position

data SourcePos

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

Defined in Text.Megaparsec.Pos

Methods

(==) :: SourcePos -> SourcePos -> Bool

(/=) :: SourcePos -> SourcePos -> Bool

Data SourcePos

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

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

Defined in Text.Megaparsec.Pos

Methods

readsPrec :: Int -> ReadS SourcePos

readList :: ReadS [SourcePos]

readPrec :: ReadPrec SourcePos

readListPrec :: ReadPrec [SourcePos]

Show SourcePos

Defined in Text.Megaparsec.Pos

Methods

showsPrec :: Int -> SourcePos -> ShowS

show :: SourcePos -> String

showList :: [SourcePos] -> ShowS

Generic SourcePos

Defined in Text.Megaparsec.Pos

Associated Types

type Rep SourcePos :: Type -> Type

Methods

from :: SourcePos -> Rep SourcePos x

to :: Rep SourcePos x -> SourcePos

NFData SourcePos

Defined in Text.Megaparsec.Pos

Methods

rnf :: SourcePos -> ()

type Rep SourcePos

Defined in Text.Megaparsec.Pos

type Rep SourcePos = D1 (MetaData "SourcePos" "Text.Megaparsec.Pos" "megaparsec-7.0.3-33us1Wj7Xo51sKKEffQvN7" 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

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

sourcePosPretty :: SourcePos -> String

Pretty-print a SourcePos.

Since: 5.0.0