Safe Haskell | None |
---|---|

Language | Haskell2010 |

This module contains types that relate to the positions of things in source files, and allow tagging of those things with locations

## Synopsis

- data RealSrcLoc
- data SrcLoc
- mkSrcLoc :: FastString -> Int -> Int -> SrcLoc
- mkRealSrcLoc :: FastString -> Int -> Int -> RealSrcLoc
- mkGeneralSrcLoc :: FastString -> SrcLoc
- noSrcLoc :: SrcLoc
- generatedSrcLoc :: SrcLoc
- interactiveSrcLoc :: SrcLoc
- advanceSrcLoc :: RealSrcLoc -> Char -> RealSrcLoc
- srcLocFile :: RealSrcLoc -> FastString
- srcLocLine :: RealSrcLoc -> Int
- srcLocCol :: RealSrcLoc -> Int
- data RealSrcSpan
- data SrcSpan
- mkGeneralSrcSpan :: FastString -> SrcSpan
- mkSrcSpan :: SrcLoc -> SrcLoc -> SrcSpan
- mkRealSrcSpan :: RealSrcLoc -> RealSrcLoc -> RealSrcSpan
- noSrcSpan :: SrcSpan
- wiredInSrcSpan :: SrcSpan
- interactiveSrcSpan :: SrcSpan
- srcLocSpan :: SrcLoc -> SrcSpan
- realSrcLocSpan :: RealSrcLoc -> RealSrcSpan
- combineSrcSpans :: SrcSpan -> SrcSpan -> SrcSpan
- srcSpanFirstCharacter :: SrcSpan -> SrcSpan
- srcSpanStart :: SrcSpan -> SrcLoc
- srcSpanEnd :: SrcSpan -> SrcLoc
- realSrcSpanStart :: RealSrcSpan -> RealSrcLoc
- realSrcSpanEnd :: RealSrcSpan -> RealSrcLoc
- srcSpanFileName_maybe :: SrcSpan -> Maybe FastString
- pprUserRealSpan :: Bool -> RealSrcSpan -> SDoc
- srcSpanFile :: RealSrcSpan -> FastString
- srcSpanStartLine :: RealSrcSpan -> Int
- srcSpanEndLine :: RealSrcSpan -> Int
- srcSpanStartCol :: RealSrcSpan -> Int
- srcSpanEndCol :: RealSrcSpan -> Int
- isGoodSrcSpan :: SrcSpan -> Bool
- isOneLineSpan :: SrcSpan -> Bool
- containsSpan :: RealSrcSpan -> RealSrcSpan -> Bool
- type Located = GenLocated SrcSpan
- type RealLocated = GenLocated RealSrcSpan
- data GenLocated l e = L l e
- noLoc :: e -> Located e
- mkGeneralLocated :: String -> e -> Located e
- getLoc :: GenLocated l e -> l
- unLoc :: GenLocated l e -> e
- eqLocated :: Eq a => Located a -> Located a -> Bool
- cmpLocated :: Ord a => Located a -> Located a -> Ordering
- combineLocs :: Located a -> Located b -> SrcSpan
- addCLoc :: Located a -> Located b -> c -> Located c
- leftmost_smallest :: SrcSpan -> SrcSpan -> Ordering
- leftmost_largest :: SrcSpan -> SrcSpan -> Ordering
- rightmost :: SrcSpan -> SrcSpan -> Ordering
- spans :: SrcSpan -> (Int, Int) -> Bool
- isSubspanOf :: SrcSpan -> SrcSpan -> Bool
- sortLocated :: [Located a] -> [Located a]

# SrcLoc

data RealSrcLoc Source #

Real Source Location

Represents a single point within a file

## Instances

Eq RealSrcLoc Source # | |

Defined in SrcLoc (==) :: RealSrcLoc -> RealSrcLoc -> Bool # (/=) :: RealSrcLoc -> RealSrcLoc -> Bool # | |

Ord RealSrcLoc Source # | |

Defined in SrcLoc compare :: RealSrcLoc -> RealSrcLoc -> Ordering # (<) :: RealSrcLoc -> RealSrcLoc -> Bool # (<=) :: RealSrcLoc -> RealSrcLoc -> Bool # (>) :: RealSrcLoc -> RealSrcLoc -> Bool # (>=) :: RealSrcLoc -> RealSrcLoc -> Bool # max :: RealSrcLoc -> RealSrcLoc -> RealSrcLoc # min :: RealSrcLoc -> RealSrcLoc -> RealSrcLoc # | |

Show RealSrcLoc Source # | |

Defined in SrcLoc showsPrec :: Int -> RealSrcLoc -> ShowS # show :: RealSrcLoc -> String # showList :: [RealSrcLoc] -> ShowS # | |

Outputable RealSrcLoc Source # | |

Source Location

## Constructing SrcLoc

mkRealSrcLoc :: FastString -> Int -> Int -> RealSrcLoc Source #

mkGeneralSrcLoc :: FastString -> SrcLoc Source #

Creates a "bad" `RealSrcLoc`

that has no detailed information about its location

Built-in "bad" `RealSrcLoc`

values for particular locations

generatedSrcLoc :: SrcLoc Source #

Built-in "bad" `RealSrcLoc`

values for particular locations

interactiveSrcLoc :: SrcLoc Source #

Built-in "bad" `RealSrcLoc`

values for particular locations

advanceSrcLoc :: RealSrcLoc -> Char -> RealSrcLoc Source #

Move the `RealSrcLoc`

down by one line if the character is a newline,
to the next 8-char tabstop if it is a tab, and across by one
character in any other case

## Unsafely deconstructing SrcLoc

srcLocFile :: RealSrcLoc -> FastString Source #

Gives the filename of the `RealSrcLoc`

srcLocLine :: RealSrcLoc -> Int Source #

Raises an error when used on a "bad" `RealSrcLoc`

srcLocCol :: RealSrcLoc -> Int Source #

Raises an error when used on a "bad" `RealSrcLoc`

# SrcSpan

data RealSrcSpan Source #

A `RealSrcSpan`

delimits a portion of a text file. It could be represented
by a pair of (line,column) coordinates, but in fact we optimise
slightly by using more compact representations for single-line and
zero-length spans, both of which are quite common.

The end position is defined to be the column *after* the end of the
span. That is, a span of (1,1)-(1,2) is one character long, and a
span of (1,1)-(1,1) is zero characters long.

Real Source Span

## Instances

Source Span

A `SrcSpan`

identifies either a specific portion of a text file
or a human-readable description of a location.

## Instances

Eq SrcSpan Source # | |

Data SrcSpan Source # | |

Defined in SrcLoc gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> SrcSpan -> c SrcSpan # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c SrcSpan # toConstr :: SrcSpan -> Constr # dataTypeOf :: SrcSpan -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c SrcSpan) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SrcSpan) # gmapT :: (forall b. Data b => b -> b) -> SrcSpan -> SrcSpan # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> SrcSpan -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> SrcSpan -> r # gmapQ :: (forall d. Data d => d -> u) -> SrcSpan -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> SrcSpan -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> SrcSpan -> m SrcSpan # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> SrcSpan -> m SrcSpan # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> SrcSpan -> m SrcSpan # | |

Ord SrcSpan Source # | |

Show SrcSpan Source # | |

NFData SrcSpan Source # | |

Outputable SrcSpan Source # | |

ToJson SrcSpan Source # | |

Binary SrcSpan Source # | |

Binary a => Binary (GenLocated SrcSpan a) Source # | |

## Constructing SrcSpan

mkGeneralSrcSpan :: FastString -> SrcSpan Source #

Create a "bad" `SrcSpan`

that has not location information

mkRealSrcSpan :: RealSrcLoc -> RealSrcLoc -> RealSrcSpan Source #

Create a `SrcSpan`

between two points in a file

wiredInSrcSpan :: SrcSpan Source #

Built-in "bad" `SrcSpan`

s for common sources of location uncertainty

interactiveSrcSpan :: SrcSpan Source #

Built-in "bad" `SrcSpan`

s for common sources of location uncertainty

combineSrcSpans :: SrcSpan -> SrcSpan -> SrcSpan Source #

Combines two `SrcSpan`

into one that spans at least all the characters
within both spans. Returns UnhelpfulSpan if the files differ.

srcSpanFirstCharacter :: SrcSpan -> SrcSpan Source #

Convert a SrcSpan into one that represents only its first character

## Deconstructing SrcSpan

srcSpanStart :: SrcSpan -> SrcLoc Source #

srcSpanEnd :: SrcSpan -> SrcLoc Source #

srcSpanFileName_maybe :: SrcSpan -> Maybe FastString Source #

Obtains the filename for a `SrcSpan`

if it is "good"

pprUserRealSpan :: Bool -> RealSrcSpan -> SDoc Source #

## Unsafely deconstructing SrcSpan

srcSpanFile :: RealSrcSpan -> FastString Source #

srcSpanStartLine :: RealSrcSpan -> Int Source #

srcSpanEndLine :: RealSrcSpan -> Int Source #

srcSpanStartCol :: RealSrcSpan -> Int Source #

srcSpanEndCol :: RealSrcSpan -> Int Source #

## Predicates on SrcSpan

isGoodSrcSpan :: SrcSpan -> Bool Source #

Test if a `SrcSpan`

is "good", i.e. has precise location information

isOneLineSpan :: SrcSpan -> Bool Source #

True if the span is known to straddle only one line.
For "bad" `SrcSpan`

, it returns False

containsSpan :: RealSrcSpan -> RealSrcSpan -> Bool Source #

Tests whether the first span "contains" the other span, meaning that it covers at least as much source code. True where spans are equal.

# Located

type Located = GenLocated SrcSpan Source #

type RealLocated = GenLocated RealSrcSpan Source #

data GenLocated l e Source #

We attach SrcSpans to lots of things, so let's have a datatype for it.

L l e |

## Instances

Functor (GenLocated l) Source # | |

Defined in SrcLoc fmap :: (a -> b) -> GenLocated l a -> GenLocated l b # (<$) :: a -> GenLocated l b -> GenLocated l a # | |

Foldable (GenLocated l) Source # | |

Defined in SrcLoc fold :: Monoid m => GenLocated l m -> m # foldMap :: Monoid m => (a -> m) -> GenLocated l a -> m # foldr :: (a -> b -> b) -> b -> GenLocated l a -> b # foldr' :: (a -> b -> b) -> b -> GenLocated l a -> b # foldl :: (b -> a -> b) -> b -> GenLocated l a -> b # foldl' :: (b -> a -> b) -> b -> GenLocated l a -> b # foldr1 :: (a -> a -> a) -> GenLocated l a -> a # foldl1 :: (a -> a -> a) -> GenLocated l a -> a # toList :: GenLocated l a -> [a] # null :: GenLocated l a -> Bool # length :: GenLocated l a -> Int # elem :: Eq a => a -> GenLocated l a -> Bool # maximum :: Ord a => GenLocated l a -> a # minimum :: Ord a => GenLocated l a -> a # sum :: Num a => GenLocated l a -> a # product :: Num a => GenLocated l a -> a # | |

Traversable (GenLocated l) Source # | |

Defined in SrcLoc traverse :: Applicative f => (a -> f b) -> GenLocated l a -> f (GenLocated l b) # sequenceA :: Applicative f => GenLocated l (f a) -> f (GenLocated l a) # mapM :: Monad m => (a -> m b) -> GenLocated l a -> m (GenLocated l b) # sequence :: Monad m => GenLocated l (m a) -> m (GenLocated l a) # | |

(Eq l, Eq e) => Eq (GenLocated l e) Source # | |

Defined in SrcLoc (==) :: GenLocated l e -> GenLocated l e -> Bool # (/=) :: GenLocated l e -> GenLocated l e -> Bool # | |

(Data l, Data e) => Data (GenLocated l e) Source # | |

Defined in SrcLoc gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> GenLocated l e -> c (GenLocated l e) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (GenLocated l e) # toConstr :: GenLocated l e -> Constr # dataTypeOf :: GenLocated l e -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (GenLocated l e)) # dataCast2 :: Typeable t => (forall d e0. (Data d, Data e0) => c (t d e0)) -> Maybe (c (GenLocated l e)) # gmapT :: (forall b. Data b => b -> b) -> GenLocated l e -> GenLocated l e # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> GenLocated l e -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> GenLocated l e -> r # gmapQ :: (forall d. Data d => d -> u) -> GenLocated l e -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> GenLocated l e -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> GenLocated l e -> m (GenLocated l e) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> GenLocated l e -> m (GenLocated l e) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> GenLocated l e -> m (GenLocated l e) # | |

(Ord l, Ord e) => Ord (GenLocated l e) Source # | |

Defined in SrcLoc compare :: GenLocated l e -> GenLocated l e -> Ordering # (<) :: GenLocated l e -> GenLocated l e -> Bool # (<=) :: GenLocated l e -> GenLocated l e -> Bool # (>) :: GenLocated l e -> GenLocated l e -> Bool # (>=) :: GenLocated l e -> GenLocated l e -> Bool # max :: GenLocated l e -> GenLocated l e -> GenLocated l e # min :: GenLocated l e -> GenLocated l e -> GenLocated l e # | |

(Outputable l, Outputable e) => Outputable (GenLocated l e) Source # | |

Binary a => Binary (GenLocated SrcSpan a) Source # | |

NamedThing e => NamedThing (GenLocated l e) Source # | |

Defined in Name getOccName :: GenLocated l e -> OccName Source # getName :: GenLocated l e -> Name Source # |

## Constructing Located

mkGeneralLocated :: String -> e -> Located e Source #

## Deconstructing Located

getLoc :: GenLocated l e -> l Source #

unLoc :: GenLocated l e -> e Source #

## Combining and comparing Located values

eqLocated :: Eq a => Located a -> Located a -> Bool Source #

Tests whether the two located things are equal

cmpLocated :: Ord a => Located a -> Located a -> Ordering Source #

Tests the ordering of the two located things

addCLoc :: Located a -> Located b -> c -> Located c Source #

Combine locations from two `Located`

things and add them to a third thing

leftmost_smallest :: SrcSpan -> SrcSpan -> Ordering Source #

Alternative strategies for ordering `SrcSpan`

s

leftmost_largest :: SrcSpan -> SrcSpan -> Ordering Source #

Alternative strategies for ordering `SrcSpan`

s

spans :: SrcSpan -> (Int, Int) -> Bool Source #

Determines whether a span encloses a given line and column index

Determines whether a span is enclosed by another one

sortLocated :: [Located a] -> [Located a] Source #