Text.Parsec.Pos

Textual source positions.

Documentation

type SourceName = String

type Line = Int

type Column = Int

data SourcePos

The abstract data type SourcePos represents source positions. It contains the name of the source (i.e. file name), a line number and a column number. SourcePos is an instance of the Show, Eq and Ord class.

Instances

Eq SourcePos

Methods

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

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

Data SourcePos

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

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

Show SourcePos

Methods

showsPrec :: Int -> SourcePos -> ShowS

show :: SourcePos -> String

showList :: [SourcePos] -> ShowS

sourceLine :: SourcePos -> Line

Extracts the line number from a source position.

sourceColumn :: SourcePos -> Column

Extracts the column number from a source position.

sourceName :: SourcePos -> SourceName

Extracts the name of the source from a source position.

incSourceLine :: SourcePos -> Line -> SourcePos

Increments the line number of a source position.

incSourceColumn :: SourcePos -> Column -> SourcePos

Increments the column number of a source position.

setSourceLine :: SourcePos -> Line -> SourcePos

Set the line number of a source position.

setSourceColumn :: SourcePos -> Column -> SourcePos

Set the column number of a source position.

setSourceName :: SourcePos -> SourceName -> SourcePos

Set the name of the source.

newPos :: SourceName -> Line -> Column -> SourcePos

Create a new SourcePos with the given source name, line number and column number.

initialPos :: SourceName -> SourcePos

Create a new SourcePos with the given source name, and line number and column number set to 1, the upper left.

updatePosChar :: SourcePos -> Char -> SourcePos

Update a source position given a character. If the character is a newline ('\n') or carriage return ('\r') the line number is incremented by 1. If the character is a tab ('t') the column number is incremented to the nearest 8'th column, ie. column + 8 - ((column-1) `mod` 8). In all other cases, the column is incremented by 1.

updatePosString :: SourcePos -> String -> SourcePos

The expression updatePosString pos s updates the source position pos by calling updatePosChar on every character in s, ie. foldl updatePosChar pos string.