ghc-8.4.4: The GHC API

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LanguageHaskell2010

SrcLoc

Contents

Description

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

Synopsis

SrcLoc

data RealSrcLoc Source #

Real Source Location

Represents a single point within a file

Instances
Eq RealSrcLoc Source # 
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Defined in SrcLoc

Ord RealSrcLoc Source # 
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Defined in SrcLoc

Show RealSrcLoc Source # 
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Defined in SrcLoc

Outputable RealSrcLoc Source # 
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Defined in SrcLoc

data SrcLoc Source #

Source Location

Instances
Eq SrcLoc Source # 
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Defined in SrcLoc

Methods

(==) :: SrcLoc -> SrcLoc -> Bool #

(/=) :: SrcLoc -> SrcLoc -> Bool #

Ord SrcLoc Source # 
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Defined in SrcLoc

Show SrcLoc Source # 
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Defined in SrcLoc

Outputable SrcLoc Source # 
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Defined in SrcLoc

Constructing SrcLoc

mkGeneralSrcLoc :: FastString -> SrcLoc Source #

Creates a "bad" SrcLoc that has no detailed information about its location

noSrcLoc :: SrcLoc Source #

Built-in "bad" SrcLoc values for particular locations

generatedSrcLoc :: SrcLoc Source #

Built-in "bad" SrcLoc values for particular locations

interactiveSrcLoc :: SrcLoc Source #

Built-in "bad" SrcLoc values for particular locations

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

Move the SrcLoc 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" SrcLoc

srcLocCol :: RealSrcLoc -> Int Source #

Raises an error when used on a "bad" SrcLoc

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
Eq RealSrcSpan Source # 
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Defined in SrcLoc

Data RealSrcSpan Source # 
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Defined in SrcLoc

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> RealSrcSpan -> c RealSrcSpan #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c RealSrcSpan #

toConstr :: RealSrcSpan -> Constr #

dataTypeOf :: RealSrcSpan -> DataType #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c RealSrcSpan) #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c RealSrcSpan) #

gmapT :: (forall b. Data b => b -> b) -> RealSrcSpan -> RealSrcSpan #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> RealSrcSpan -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> RealSrcSpan -> r #

gmapQ :: (forall d. Data d => d -> u) -> RealSrcSpan -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> RealSrcSpan -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> RealSrcSpan -> m RealSrcSpan #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> RealSrcSpan -> m RealSrcSpan #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> RealSrcSpan -> m RealSrcSpan #

Ord RealSrcSpan Source # 
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Defined in SrcLoc

Show RealSrcSpan Source # 
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Defined in SrcLoc

Outputable RealSrcSpan Source # 
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ToJson RealSrcSpan Source # 
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Defined in SrcLoc

data SrcSpan Source #

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 # 
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Defined in SrcLoc

Methods

(==) :: SrcSpan -> SrcSpan -> Bool #

(/=) :: SrcSpan -> SrcSpan -> Bool #

Data SrcSpan Source # 
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Defined in SrcLoc

Methods

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 # 
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Show SrcSpan Source # 
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NFData SrcSpan Source # 
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Methods

rnf :: SrcSpan -> () #

Outputable SrcSpan Source # 
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ToJson SrcSpan Source # 
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Defined in SrcLoc

Methods

json :: SrcSpan -> JsonDoc Source #

Binary SrcSpan Source # 
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Defined in Binary

Binary a => Binary (GenLocated SrcSpan a) Source # 
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Defined in Binary

Constructing SrcSpan

mkGeneralSrcSpan :: FastString -> SrcSpan Source #

Create a "bad" SrcSpan that has not location information

mkSrcSpan :: SrcLoc -> SrcLoc -> SrcSpan Source #

Create a SrcSpan between two points in a file

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

Create a SrcSpan between two points in a file

noSrcSpan :: SrcSpan Source #

Built-in "bad" SrcSpans for common sources of location uncertainty

wiredInSrcSpan :: SrcSpan Source #

Built-in "bad" SrcSpans for common sources of location uncertainty

interactiveSrcSpan :: SrcSpan Source #

Built-in "bad" SrcSpans for common sources of location uncertainty

srcLocSpan :: SrcLoc -> SrcSpan Source #

Create a SrcSpan corresponding to a single point

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

Combines two SrcSpan into one that spans at least all the characters within both spans. Assumes the "file" part is the same in both inputs

srcSpanFirstCharacter :: SrcSpan -> SrcSpan Source #

Convert a SrcSpan into one that represents only its first character

Deconstructing SrcSpan

srcSpanStart :: SrcSpan -> SrcLoc Source #

Returns the location at the start of the SrcSpan or a "bad" SrcSpan if that is unavailable

srcSpanEnd :: SrcSpan -> SrcLoc Source #

Returns the location at the end of the SrcSpan or a "bad" SrcSpan if that is unavailable

srcSpanFileName_maybe :: SrcSpan -> Maybe FastString Source #

Obtains the filename for a SrcSpan if it is "good"

Unsafely deconstructing SrcSpan

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

data GenLocated l e Source #

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

Constructors

L l e 
Instances
Functor (GenLocated l) Source # 
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Defined in SrcLoc

Methods

fmap :: (a -> b) -> GenLocated l a -> GenLocated l b #

(<$) :: a -> GenLocated l b -> GenLocated l a #

Foldable (GenLocated l) Source # 
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Defined in SrcLoc

Methods

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 # 
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Defined in SrcLoc

Methods

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 # 
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Defined in SrcLoc

Methods

(==) :: GenLocated l e -> GenLocated l e -> Bool #

(/=) :: GenLocated l e -> GenLocated l e -> Bool #

(Data l, Data e) => Data (GenLocated l e) Source # 
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Defined in SrcLoc

Methods

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 # 
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Defined in SrcLoc

Methods

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 # 
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Defined in SrcLoc

Binary a => Binary (GenLocated SrcSpan a) Source # 
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Defined in Binary

NamedThing e => NamedThing (GenLocated l e) Source # 
Instance details

Defined in Name

Constructing Located

noLoc :: e -> Located e Source #

Deconstructing Located

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 SrcSpans

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

Alternative strategies for ordering SrcSpans

rightmost :: SrcSpan -> SrcSpan -> Ordering Source #

Alternative strategies for ordering SrcSpans

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

Determines whether a span encloses a given line and column index

isSubspanOf Source #

Arguments

:: SrcSpan

The span that may be enclosed by the other

-> SrcSpan

The span it may be enclosed by

-> Bool 

Determines whether a span is enclosed by another one