{-# LANGUAGE EmptyCase #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeFamilyDependencies #-}
{-# LANGUAGE FlexibleContexts #-}

{-
(c) The University of Glasgow 2006-2012
(c) The GRASP Project, Glasgow University, 1992-1998
-}

-- | This module defines classes and functions for pretty-printing. It also
-- exports a number of helpful debugging and other utilities such as 'trace' and 'panic'.
--
-- The interface to this module is very similar to the standard Hughes-PJ pretty printing
-- module, except that it exports a number of additional functions that are rarely used,
-- and works over the 'SDoc' type.
module GHC.Utils.Outputable (
        -- * Type classes
        Outputable(..), OutputableBndr(..), OutputableP(..),
        BindingSite(..),  JoinPointHood(..), isJoinPoint,

        IsOutput(..), IsLine(..), IsDoc(..),
        HLine, HDoc,

        -- * Pretty printing combinators
        SDoc, runSDoc, PDoc(..),
        docToSDoc,
        interppSP, interpp'SP, interpp'SP',
        pprQuotedList, pprWithCommas, pprWithSemis,
        unquotedListWith,
        quotedListWithOr, quotedListWithNor, quotedListWithAnd,
        pprWithBars,
        spaceIfSingleQuote,
        isEmpty, nest,
        ptext,
        int, intWithCommas, integer, word64, word, float, double, rational, doublePrec,
        parens, cparen, brackets, braces, quotes, quote, quoteIfPunsEnabled,
        doubleQuotes, angleBrackets,
        semi, comma, colon, dcolon, space, equals, dot, vbar,
        arrow, lollipop, larrow, darrow, arrowt, larrowt, arrowtt, larrowtt,
        lambda,
        lparen, rparen, lbrack, rbrack, lbrace, rbrace, underscore,
        blankLine, forAllLit, bullet,
        ($+$),
        cat, fcat,
        hang, hangNotEmpty, punctuate, punctuateFinal,
        ppWhen, ppUnless, ppWhenOption, ppUnlessOption,
        speakNth, speakN, speakNOf, plural, singular,
        isOrAre, doOrDoes, itsOrTheir, thisOrThese, hasOrHave,
        itOrThey,
        unicodeSyntax,

        coloured, keyword,

        -- * Converting 'SDoc' into strings and outputting it
        printSDoc, printSDocLn,
        bufLeftRenderSDoc,
        pprCode,
        showSDocOneLine,
        showSDocUnsafe,
        showPprUnsafe,
        renderWithContext,
        pprDebugAndThen,

        pprInfixVar, pprPrefixVar,
        pprHsChar, pprHsString, pprHsBytes,

        primFloatSuffix, primCharSuffix, primDoubleSuffix,
        primInt8Suffix, primWord8Suffix,
        primInt16Suffix, primWord16Suffix,
        primInt32Suffix, primWord32Suffix,
        primInt64Suffix, primWord64Suffix,
        primIntSuffix, primWordSuffix,

        pprPrimChar, pprPrimInt, pprPrimWord,
        pprPrimInt8, pprPrimWord8,
        pprPrimInt16, pprPrimWord16,
        pprPrimInt32, pprPrimWord32,
        pprPrimInt64, pprPrimWord64,

        pprFastFilePath, pprFilePathString,

        pprModuleName,

        -- * Controlling the style in which output is printed
        PprStyle(..), NamePprCtx(..),
        QueryQualifyName, QueryQualifyModule, QueryQualifyPackage, QueryPromotionTick,
        PromotedItem(..), IsEmptyOrSingleton(..), isListEmptyOrSingleton,
        PromotionTickContext(..),
        reallyAlwaysQualify, reallyAlwaysQualifyNames,
        alwaysQualify, alwaysQualifyNames, alwaysQualifyModules,
        neverQualify, neverQualifyNames, neverQualifyModules,
        alwaysQualifyPackages, neverQualifyPackages,
        alwaysPrintPromTick,
        QualifyName(..), queryQual,
        sdocOption,
        updSDocContext,
        SDocContext (..), sdocWithContext,
        defaultSDocContext, traceSDocContext,
        getPprStyle, withPprStyle, setStyleColoured,
        pprDeeper, pprDeeperList, pprSetDepth,
        codeStyle, userStyle, dumpStyle,
        qualName, qualModule, qualPackage, promTick,
        mkErrStyle, defaultErrStyle, defaultDumpStyle, mkDumpStyle, defaultUserStyle,
        mkUserStyle, cmdlineParserStyle, Depth(..),
        withUserStyle, withErrStyle,

        ifPprDebug, whenPprDebug, getPprDebug,

        bPutHDoc
    ) where

import Language.Haskell.Syntax.Module.Name ( ModuleName(..) )

import GHC.Prelude.Basic

import {-# SOURCE #-}   GHC.Unit.Types ( Unit, Module, moduleName )
import {-# SOURCE #-}   GHC.Types.Name.Occurrence( OccName )

import GHC.Utils.BufHandle (BufHandle, bPutChar, bPutStr, bPutFS, bPutFZS)
import GHC.Data.FastString
import qualified GHC.Utils.Ppr as Pretty
import qualified GHC.Utils.Ppr.Colour as Col
import GHC.Utils.Ppr       ( Doc, Mode(..) )
import GHC.Utils.Panic.Plain (assert)
import GHC.Serialized
import GHC.LanguageExtensions (Extension)
import GHC.Utils.GlobalVars( unsafeHasPprDebug )
import GHC.Utils.Misc (lastMaybe, snocView)

import Data.ByteString (ByteString)
import qualified Data.ByteString as BS
import Data.Char
import qualified Data.Map as M
import Data.Int
import qualified Data.IntMap as IM
import Data.Set (Set)
import qualified Data.Set as Set
import qualified Data.IntSet as IntSet
import qualified GHC.Data.Word64Set as Word64Set
import Data.String
import Data.Word
import System.IO        ( Handle )
import System.FilePath
import Text.Printf
import Numeric (showFFloat)
import Data.Graph (SCC(..))
import Data.List (intersperse)
import Data.List.NonEmpty (NonEmpty (..))
import Data.Semigroup (Arg(..))
import qualified Data.List.NonEmpty as NEL
import Data.Time ( UTCTime )
import Data.Time.Format.ISO8601
import Data.Void
import Control.DeepSeq (NFData(rnf))

import GHC.Fingerprint
import GHC.Show         ( showMultiLineString )
import GHC.Utils.Exception
import GHC.Exts (oneShot)

{-
************************************************************************
*                                                                      *
\subsection{The @PprStyle@ data type}
*                                                                      *
************************************************************************
-}

data PprStyle
  = PprUser NamePprCtx Depth Coloured
                -- Pretty-print in a way that will make sense to the
                -- ordinary user; must be very close to Haskell
                -- syntax, etc.
                -- Assumes printing tidied code: non-system names are
                -- printed without uniques.

  | PprDump NamePprCtx
                -- For -ddump-foo; less verbose than in ppr-debug mode, but more than PprUser
                -- Does not assume tidied code: non-external names
                -- are printed with uniques.

  | PprCode -- ^ Print code; either C or assembler

data Depth
   = AllTheWay
   | PartWay Int  -- ^ 0 => stop
   | DefaultDepth -- ^ Use 'sdocDefaultDepth' field as depth

data Coloured
  = Uncoloured
  | Coloured

-- -----------------------------------------------------------------------------
-- Printing original names

-- | When printing code that contains original names, we need to map the
-- original names back to something the user understands.  This is the
-- purpose of the triple of functions that gets passed around
-- when rendering 'SDoc'.
data NamePprCtx = QueryQualify {
    NamePprCtx -> QueryQualifyName
queryQualifyName    :: QueryQualifyName,
    NamePprCtx -> QueryQualifyModule
queryQualifyModule  :: QueryQualifyModule,
    NamePprCtx -> QueryQualifyPackage
queryQualifyPackage :: QueryQualifyPackage,
    NamePprCtx -> QueryPromotionTick
queryPromotionTick  :: QueryPromotionTick
}

-- | Given a `Name`'s `Module` and `OccName`, decide whether and how to qualify
-- it.
type QueryQualifyName = Module -> OccName -> QualifyName

-- | For a given module, we need to know whether to print it with
-- a package name to disambiguate it.
type QueryQualifyModule = Module -> Bool

-- | For a given package, we need to know whether to print it with
-- the component id to disambiguate it.
type QueryQualifyPackage = Unit -> Bool

-- | Given a promoted data constructor,
-- decide whether to print a tick to disambiguate the namespace.
type QueryPromotionTick = PromotedItem -> Bool

-- | Flags that affect whether a promotion tick is printed.
data PromotionTickContext =
  PromTickCtx {
    PromotionTickContext -> Bool
ptcListTuplePuns :: !Bool,
    PromotionTickContext -> Bool
ptcPrintRedundantPromTicks :: !Bool
  }

data PromotedItem =
    PromotedItemListSyntax IsEmptyOrSingleton -- '[x]
  | PromotedItemTupleSyntax                   -- '(x, y)
  | PromotedItemDataCon OccName               -- 'MkT

newtype IsEmptyOrSingleton = IsEmptyOrSingleton Bool

isListEmptyOrSingleton :: [a] -> IsEmptyOrSingleton
isListEmptyOrSingleton :: forall a. [a] -> IsEmptyOrSingleton
isListEmptyOrSingleton [a]
xs =
  Bool -> IsEmptyOrSingleton
IsEmptyOrSingleton (Bool -> IsEmptyOrSingleton) -> Bool -> IsEmptyOrSingleton
forall a b. (a -> b) -> a -> b
$ case [a]
xs of
    []  -> Bool
True
    [a
_] -> Bool
True
    [a]
_   -> Bool
False

-- See Note [Printing original names] in GHC.Types.Name.Ppr
data QualifyName   -- Given P:M.T
  = NameUnqual           -- It's in scope unqualified as "T"
                         -- OR nothing called "T" is in scope

  | NameQual ModuleName  -- It's in scope qualified as "X.T"

  | NameNotInScope1      -- It's not in scope at all, but M.T is not bound
                         -- in the current scope, so we can refer to it as "M.T"

  | NameNotInScope2      -- It's not in scope at all, and M.T is already bound in
                         -- the current scope, so we must refer to it as "P:M.T"

instance Outputable QualifyName where
  ppr :: QualifyName -> SDoc
ppr QualifyName
NameUnqual      = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"NameUnqual"
  ppr (NameQual ModuleName
_mod) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"NameQual"  -- can't print the mod without module loops :(
  ppr QualifyName
NameNotInScope1 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"NameNotInScope1"
  ppr QualifyName
NameNotInScope2 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"NameNotInScope2"

reallyAlwaysQualifyNames :: QueryQualifyName
reallyAlwaysQualifyNames :: QueryQualifyName
reallyAlwaysQualifyNames Module
_ OccName
_ = QualifyName
NameNotInScope2

-- | NB: This won't ever show package IDs
alwaysQualifyNames :: QueryQualifyName
alwaysQualifyNames :: QueryQualifyName
alwaysQualifyNames Module
m OccName
_ = ModuleName -> QualifyName
NameQual (Module -> ModuleName
forall a. GenModule a -> ModuleName
moduleName Module
m)

neverQualifyNames :: QueryQualifyName
neverQualifyNames :: QueryQualifyName
neverQualifyNames Module
_ OccName
_ = QualifyName
NameUnqual

alwaysQualifyModules :: QueryQualifyModule
alwaysQualifyModules :: QueryQualifyModule
alwaysQualifyModules Module
_ = Bool
True

neverQualifyModules :: QueryQualifyModule
neverQualifyModules :: QueryQualifyModule
neverQualifyModules Module
_ = Bool
False

alwaysQualifyPackages :: QueryQualifyPackage
alwaysQualifyPackages :: QueryQualifyPackage
alwaysQualifyPackages Unit
_ = Bool
True

neverQualifyPackages :: QueryQualifyPackage
neverQualifyPackages :: QueryQualifyPackage
neverQualifyPackages Unit
_ = Bool
False

alwaysPrintPromTick :: QueryPromotionTick
alwaysPrintPromTick :: QueryPromotionTick
alwaysPrintPromTick PromotedItem
_ = Bool
True

reallyAlwaysQualify, alwaysQualify, neverQualify :: NamePprCtx
reallyAlwaysQualify :: NamePprCtx
reallyAlwaysQualify
              = QueryQualifyName
-> QueryQualifyModule
-> QueryQualifyPackage
-> QueryPromotionTick
-> NamePprCtx
QueryQualify QueryQualifyName
reallyAlwaysQualifyNames
                             QueryQualifyModule
alwaysQualifyModules
                             QueryQualifyPackage
alwaysQualifyPackages
                             QueryPromotionTick
alwaysPrintPromTick
alwaysQualify :: NamePprCtx
alwaysQualify = QueryQualifyName
-> QueryQualifyModule
-> QueryQualifyPackage
-> QueryPromotionTick
-> NamePprCtx
QueryQualify QueryQualifyName
alwaysQualifyNames
                             QueryQualifyModule
alwaysQualifyModules
                             QueryQualifyPackage
alwaysQualifyPackages
                             QueryPromotionTick
alwaysPrintPromTick
neverQualify :: NamePprCtx
neverQualify  = QueryQualifyName
-> QueryQualifyModule
-> QueryQualifyPackage
-> QueryPromotionTick
-> NamePprCtx
QueryQualify QueryQualifyName
neverQualifyNames
                             QueryQualifyModule
neverQualifyModules
                             QueryQualifyPackage
neverQualifyPackages
                             QueryPromotionTick
alwaysPrintPromTick

defaultUserStyle :: PprStyle
defaultUserStyle :: PprStyle
defaultUserStyle = NamePprCtx -> Depth -> PprStyle
mkUserStyle NamePprCtx
neverQualify Depth
AllTheWay

defaultDumpStyle :: PprStyle
 -- Print without qualifiers to reduce verbosity, unless -dppr-debug
defaultDumpStyle :: PprStyle
defaultDumpStyle = NamePprCtx -> PprStyle
PprDump NamePprCtx
neverQualify

mkDumpStyle :: NamePprCtx -> PprStyle
mkDumpStyle :: NamePprCtx -> PprStyle
mkDumpStyle NamePprCtx
name_ppr_ctx = NamePprCtx -> PprStyle
PprDump NamePprCtx
name_ppr_ctx

-- | Default style for error messages, when we don't know NamePprCtx
-- It's a bit of a hack because it doesn't take into account what's in scope
-- Only used for desugarer warnings, and typechecker errors in interface sigs
defaultErrStyle :: PprStyle
defaultErrStyle :: PprStyle
defaultErrStyle = NamePprCtx -> PprStyle
mkErrStyle NamePprCtx
neverQualify

-- | Style for printing error messages
mkErrStyle :: NamePprCtx -> PprStyle
mkErrStyle :: NamePprCtx -> PprStyle
mkErrStyle NamePprCtx
name_ppr_ctx = NamePprCtx -> Depth -> PprStyle
mkUserStyle NamePprCtx
name_ppr_ctx Depth
DefaultDepth

cmdlineParserStyle :: PprStyle
cmdlineParserStyle :: PprStyle
cmdlineParserStyle = NamePprCtx -> Depth -> PprStyle
mkUserStyle NamePprCtx
alwaysQualify Depth
AllTheWay

mkUserStyle :: NamePprCtx -> Depth -> PprStyle
mkUserStyle :: NamePprCtx -> Depth -> PprStyle
mkUserStyle NamePprCtx
name_ppr_ctx Depth
depth = NamePprCtx -> Depth -> Coloured -> PprStyle
PprUser NamePprCtx
name_ppr_ctx Depth
depth Coloured
Uncoloured

withUserStyle :: NamePprCtx -> Depth -> SDoc -> SDoc
withUserStyle :: NamePprCtx -> Depth -> SDoc -> SDoc
withUserStyle NamePprCtx
name_ppr_ctx Depth
depth SDoc
doc = PprStyle -> SDoc -> SDoc
withPprStyle (NamePprCtx -> Depth -> Coloured -> PprStyle
PprUser NamePprCtx
name_ppr_ctx Depth
depth Coloured
Uncoloured) SDoc
doc

withErrStyle :: NamePprCtx -> SDoc -> SDoc
withErrStyle :: NamePprCtx -> SDoc -> SDoc
withErrStyle NamePprCtx
name_ppr_ctx SDoc
doc =
   PprStyle -> SDoc -> SDoc
withPprStyle (NamePprCtx -> PprStyle
mkErrStyle NamePprCtx
name_ppr_ctx) SDoc
doc

setStyleColoured :: Bool -> PprStyle -> PprStyle
setStyleColoured :: Bool -> PprStyle -> PprStyle
setStyleColoured Bool
col PprStyle
style =
  case PprStyle
style of
    PprUser NamePprCtx
q Depth
d Coloured
_ -> NamePprCtx -> Depth -> Coloured -> PprStyle
PprUser NamePprCtx
q Depth
d Coloured
c
    PprStyle
_             -> PprStyle
style
  where
    c :: Coloured
c | Bool
col       = Coloured
Coloured
      | Bool
otherwise = Coloured
Uncoloured

instance Outputable PprStyle where
  ppr :: PprStyle -> SDoc
ppr (PprUser {})  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"user-style"
  ppr (PprCode {})  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"code-style"
  ppr (PprDump {})  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"dump-style"

{-
Orthogonal to the above printing styles are (possibly) some
command-line flags that affect printing (often carried with the
style).  The most likely ones are variations on how much type info is
shown.

The following test decides whether or not we are actually generating
code (either C or assembly), or generating interface files.

************************************************************************
*                                                                      *
\subsection{The @SDoc@ data type}
*                                                                      *
************************************************************************
-}

-- | Represents a pretty-printable document.
--
-- To display an 'SDoc', use 'printSDoc', 'printSDocLn', 'bufLeftRenderSDoc',
-- or 'renderWithContext'.  Avoid calling 'runSDoc' directly as it breaks the
-- abstraction layer.
newtype SDoc = SDoc' (SDocContext -> Doc)

-- See Note [The one-shot state monad trick] in GHC.Utils.Monad
{-# COMPLETE SDoc #-}
pattern SDoc :: (SDocContext -> Doc) -> SDoc
pattern $mSDoc :: forall {r}.
SDoc -> ((SDocContext -> Doc) -> r) -> ((# #) -> r) -> r
$bSDoc :: (SDocContext -> Doc) -> SDoc
SDoc m <- SDoc' m
  where
    SDoc SDocContext -> Doc
m = (SDocContext -> Doc) -> SDoc
SDoc' ((SDocContext -> Doc) -> SDocContext -> Doc
forall a b. (a -> b) -> a -> b
oneShot SDocContext -> Doc
m)

runSDoc :: SDoc -> (SDocContext -> Doc)
runSDoc :: SDoc -> SDocContext -> Doc
runSDoc (SDoc SDocContext -> Doc
m) = SDocContext -> Doc
m

data SDocContext = SDC
  { SDocContext -> PprStyle
sdocStyle                       :: !PprStyle
  , SDocContext -> Scheme
sdocColScheme                   :: !Col.Scheme
  , SDocContext -> PprColour
sdocLastColour                  :: !Col.PprColour
      -- ^ The most recently used colour.
      -- This allows nesting colours.
  , SDocContext -> Bool
sdocShouldUseColor              :: !Bool
  , SDocContext -> Int
sdocDefaultDepth                :: !Int
  , SDocContext -> Int
sdocLineLength                  :: !Int
  , SDocContext -> Bool
sdocCanUseUnicode               :: !Bool
      -- ^ True if Unicode encoding is supported
      -- and not disabled by GHC_NO_UNICODE environment variable
  , SDocContext -> Bool
sdocPrintErrIndexLinks          :: !Bool
  , SDocContext -> Bool
sdocHexWordLiterals             :: !Bool
  , SDocContext -> Bool
sdocPprDebug                    :: !Bool
  , SDocContext -> Bool
sdocPrintUnicodeSyntax          :: !Bool
  , SDocContext -> Bool
sdocPrintCaseAsLet              :: !Bool
  , SDocContext -> Bool
sdocPrintTypecheckerElaboration :: !Bool
  , SDocContext -> Bool
sdocPrintAxiomIncomps           :: !Bool
  , SDocContext -> Bool
sdocPrintExplicitKinds          :: !Bool
  , SDocContext -> Bool
sdocPrintExplicitCoercions      :: !Bool
  , SDocContext -> Bool
sdocPrintExplicitRuntimeReps    :: !Bool
  , SDocContext -> Bool
sdocPrintExplicitForalls        :: !Bool
  , SDocContext -> Bool
sdocPrintPotentialInstances     :: !Bool
  , SDocContext -> Bool
sdocPrintEqualityRelations      :: !Bool
  , SDocContext -> Bool
sdocSuppressTicks               :: !Bool
  , SDocContext -> Bool
sdocSuppressTypeSignatures      :: !Bool
  , SDocContext -> Bool
sdocSuppressTypeApplications    :: !Bool
  , SDocContext -> Bool
sdocSuppressIdInfo              :: !Bool
  , SDocContext -> Bool
sdocSuppressCoercions           :: !Bool
  , SDocContext -> Bool
sdocSuppressCoercionTypes       :: !Bool
  , SDocContext -> Bool
sdocSuppressUnfoldings          :: !Bool
  , SDocContext -> Bool
sdocSuppressVarKinds            :: !Bool
  , SDocContext -> Bool
sdocSuppressUniques             :: !Bool
  , SDocContext -> Bool
sdocSuppressModulePrefixes      :: !Bool
  , SDocContext -> Bool
sdocSuppressStgExts             :: !Bool
  , SDocContext -> Bool
sdocSuppressStgReps             :: !Bool
  , SDocContext -> Bool
sdocErrorSpans                  :: !Bool
  , SDocContext -> Bool
sdocStarIsType                  :: !Bool
  , SDocContext -> Bool
sdocLinearTypes                 :: !Bool
  , SDocContext -> Bool
sdocListTuplePuns               :: !Bool
  , SDocContext -> Bool
sdocPrintTypeAbbreviations      :: !Bool
  , SDocContext -> FastString -> SDoc
sdocUnitIdForUser               :: !(FastString -> SDoc)
      -- ^ Used to map UnitIds to more friendly "package-version:component"
      -- strings while pretty-printing.
      --
      -- Use `GHC.Unit.State.pprWithUnitState` to set it. Users should never
      -- have to set it to pretty-print SDocs emitted by GHC, otherwise it's a
      -- bug. It's an internal field used to thread the UnitState so that the
      -- Outputable instance of UnitId can use it.
      --
      -- See Note [Pretty-printing UnitId] in "GHC.Unit" for more details.
      --
      -- Note that we use `FastString` instead of `UnitId` to avoid boring
      -- module inter-dependency issues.
  }

instance IsString SDoc where
  fromString :: String -> SDoc
fromString = String -> SDoc
forall doc. IsLine doc => String -> doc
text

-- The lazy programmer's friend.
instance Outputable SDoc where
  ppr :: SDoc -> SDoc
ppr = SDoc -> SDoc
forall a. a -> a
id

-- | Default pretty-printing options
defaultSDocContext :: SDocContext
defaultSDocContext :: SDocContext
defaultSDocContext = SDC
  { sdocStyle :: PprStyle
sdocStyle                       = PprStyle
defaultDumpStyle
  , sdocColScheme :: Scheme
sdocColScheme                   = Scheme
Col.defaultScheme
  , sdocLastColour :: PprColour
sdocLastColour                  = PprColour
Col.colReset
  , sdocShouldUseColor :: Bool
sdocShouldUseColor              = Bool
False
  , sdocDefaultDepth :: Int
sdocDefaultDepth                = Int
5
  , sdocLineLength :: Int
sdocLineLength                  = Int
100
  , sdocCanUseUnicode :: Bool
sdocCanUseUnicode               = Bool
False
  , sdocPrintErrIndexLinks :: Bool
sdocPrintErrIndexLinks          = Bool
False
  , sdocHexWordLiterals :: Bool
sdocHexWordLiterals             = Bool
False
  , sdocPprDebug :: Bool
sdocPprDebug                    = Bool
False
  , sdocPrintUnicodeSyntax :: Bool
sdocPrintUnicodeSyntax          = Bool
False
  , sdocPrintCaseAsLet :: Bool
sdocPrintCaseAsLet              = Bool
False
  , sdocPrintTypecheckerElaboration :: Bool
sdocPrintTypecheckerElaboration = Bool
False
  , sdocPrintAxiomIncomps :: Bool
sdocPrintAxiomIncomps           = Bool
False
  , sdocPrintExplicitKinds :: Bool
sdocPrintExplicitKinds          = Bool
False
  , sdocPrintExplicitCoercions :: Bool
sdocPrintExplicitCoercions      = Bool
False
  , sdocPrintExplicitRuntimeReps :: Bool
sdocPrintExplicitRuntimeReps    = Bool
False
  , sdocPrintExplicitForalls :: Bool
sdocPrintExplicitForalls        = Bool
False
  , sdocPrintPotentialInstances :: Bool
sdocPrintPotentialInstances     = Bool
False
  , sdocPrintEqualityRelations :: Bool
sdocPrintEqualityRelations      = Bool
False
  , sdocSuppressTicks :: Bool
sdocSuppressTicks               = Bool
False
  , sdocSuppressTypeSignatures :: Bool
sdocSuppressTypeSignatures      = Bool
False
  , sdocSuppressTypeApplications :: Bool
sdocSuppressTypeApplications    = Bool
False
  , sdocSuppressIdInfo :: Bool
sdocSuppressIdInfo              = Bool
False
  , sdocSuppressCoercions :: Bool
sdocSuppressCoercions           = Bool
False
  , sdocSuppressCoercionTypes :: Bool
sdocSuppressCoercionTypes       = Bool
False
  , sdocSuppressUnfoldings :: Bool
sdocSuppressUnfoldings          = Bool
False
  , sdocSuppressVarKinds :: Bool
sdocSuppressVarKinds            = Bool
False
  , sdocSuppressUniques :: Bool
sdocSuppressUniques             = Bool
False
  , sdocSuppressModulePrefixes :: Bool
sdocSuppressModulePrefixes      = Bool
False
  , sdocSuppressStgExts :: Bool
sdocSuppressStgExts             = Bool
False
  , sdocSuppressStgReps :: Bool
sdocSuppressStgReps             = Bool
True
  , sdocErrorSpans :: Bool
sdocErrorSpans                  = Bool
False
  , sdocStarIsType :: Bool
sdocStarIsType                  = Bool
False
  , sdocLinearTypes :: Bool
sdocLinearTypes                 = Bool
False
  , sdocListTuplePuns :: Bool
sdocListTuplePuns               = Bool
True
  , sdocPrintTypeAbbreviations :: Bool
sdocPrintTypeAbbreviations      = Bool
True
  , sdocUnitIdForUser :: FastString -> SDoc
sdocUnitIdForUser               = FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext
  }

traceSDocContext :: SDocContext
-- Used for pprTrace, when we want to see lots of info
traceSDocContext :: SDocContext
traceSDocContext = SDocContext
defaultSDocContext
  { sdocPprDebug                    = unsafeHasPprDebug
  , sdocPrintTypecheckerElaboration = True
  , sdocPrintExplicitKinds          = True
  , sdocPrintExplicitCoercions      = True
  , sdocPrintExplicitRuntimeReps    = True
  , sdocPrintExplicitForalls        = True
  , sdocPrintEqualityRelations      = True
  }

withPprStyle :: PprStyle -> SDoc -> SDoc
{-# INLINE CONLIKE withPprStyle #-}
withPprStyle :: PprStyle -> SDoc -> SDoc
withPprStyle PprStyle
sty SDoc
d = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctxt -> SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctxt{sdocStyle=sty}

pprDeeper :: SDoc -> SDoc
pprDeeper :: SDoc -> SDoc
pprDeeper SDoc
d = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> case SDocContext -> PprStyle
sdocStyle SDocContext
ctx of
  PprUser NamePprCtx
q Depth
depth Coloured
c ->
   let deeper :: Int -> Doc
deeper Int
0 = String -> Doc
Pretty.text String
"..."
       deeper Int
n = SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx{sdocStyle = PprUser q (PartWay (n-1)) c}
   in case Depth
depth of
         Depth
DefaultDepth -> Int -> Doc
deeper (SDocContext -> Int
sdocDefaultDepth SDocContext
ctx)
         PartWay Int
n    -> Int -> Doc
deeper Int
n
         Depth
AllTheWay    -> SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx
  PprStyle
_ -> SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx


-- | Truncate a list that is longer than the current depth.
pprDeeperList :: ([SDoc] -> SDoc) -> [SDoc] -> SDoc
pprDeeperList :: ([SDoc] -> SDoc) -> [SDoc] -> SDoc
pprDeeperList [SDoc] -> SDoc
f [SDoc]
ds
  | [SDoc] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [SDoc]
ds   = [SDoc] -> SDoc
f []
  | Bool
otherwise = (SDocContext -> Doc) -> SDoc
SDoc SDocContext -> Doc
work
 where
  work :: SDocContext -> Doc
work ctx :: SDocContext
ctx@SDC{sdocStyle :: SDocContext -> PprStyle
sdocStyle=PprUser NamePprCtx
q Depth
depth Coloured
c}
   | Depth
DefaultDepth <- Depth
depth
   = SDocContext -> Doc
work (SDocContext
ctx { sdocStyle = PprUser q (PartWay (sdocDefaultDepth ctx)) c })
   | PartWay Int
0 <- Depth
depth
   = String -> Doc
Pretty.text String
"..."
   | PartWay Int
n <- Depth
depth
   = let
        go :: Int -> [SDoc] -> [SDoc]
go Int
_ [] = []
        go Int
i (SDoc
d:[SDoc]
ds) | Int
i Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>= Int
n    = [String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"...."]
                    | Bool
otherwise = SDoc
d SDoc -> [SDoc] -> [SDoc]
forall a. a -> [a] -> [a]
: Int -> [SDoc] -> [SDoc]
go (Int
iInt -> Int -> Int
forall a. Num a => a -> a -> a
+Int
1) [SDoc]
ds
     in SDoc -> SDocContext -> Doc
runSDoc ([SDoc] -> SDoc
f (Int -> [SDoc] -> [SDoc]
go Int
0 [SDoc]
ds)) SDocContext
ctx{sdocStyle = PprUser q (PartWay (n-1)) c}
  work SDocContext
other_ctx = SDoc -> SDocContext -> Doc
runSDoc ([SDoc] -> SDoc
f [SDoc]
ds) SDocContext
other_ctx

pprSetDepth :: Depth -> SDoc -> SDoc
pprSetDepth :: Depth -> SDoc -> SDoc
pprSetDepth Depth
depth SDoc
doc = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx ->
    case SDocContext
ctx of
        SDC{sdocStyle :: SDocContext -> PprStyle
sdocStyle=PprUser NamePprCtx
q Depth
_ Coloured
c} ->
            SDoc -> SDocContext -> Doc
runSDoc SDoc
doc SDocContext
ctx{sdocStyle = PprUser q depth c}
        SDocContext
_ ->
            SDoc -> SDocContext -> Doc
runSDoc SDoc
doc SDocContext
ctx

getPprStyle :: (PprStyle -> SDoc) -> SDoc
{-# INLINE CONLIKE getPprStyle #-}
getPprStyle :: (PprStyle -> SDoc) -> SDoc
getPprStyle PprStyle -> SDoc
df = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> SDoc -> SDocContext -> Doc
runSDoc (PprStyle -> SDoc
df (SDocContext -> PprStyle
sdocStyle SDocContext
ctx)) SDocContext
ctx

sdocWithContext :: (SDocContext -> SDoc) -> SDoc
{-# INLINE CONLIKE sdocWithContext #-}
sdocWithContext :: (SDocContext -> SDoc) -> SDoc
sdocWithContext SDocContext -> SDoc
f = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> SDoc -> SDocContext -> Doc
runSDoc (SDocContext -> SDoc
f SDocContext
ctx) SDocContext
ctx

sdocOption :: (SDocContext -> a) -> (a -> SDoc) -> SDoc
{-# INLINE CONLIKE sdocOption #-}
sdocOption :: forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> a
f a -> SDoc
g = (SDocContext -> SDoc) -> SDoc
sdocWithContext (a -> SDoc
g (a -> SDoc) -> (SDocContext -> a) -> SDocContext -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SDocContext -> a
f)

updSDocContext :: (SDocContext -> SDocContext) -> SDoc -> SDoc
{-# INLINE CONLIKE updSDocContext #-}
updSDocContext :: (SDocContext -> SDocContext) -> SDoc -> SDoc
updSDocContext SDocContext -> SDocContext
upd SDoc
doc
  = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> SDoc -> SDocContext -> Doc
runSDoc SDoc
doc (SDocContext -> SDocContext
upd SDocContext
ctx)

qualName :: PprStyle -> QueryQualifyName
qualName :: PprStyle -> QueryQualifyName
qualName (PprUser NamePprCtx
q Depth
_ Coloured
_) Module
mod OccName
occ = NamePprCtx -> QueryQualifyName
queryQualifyName NamePprCtx
q Module
mod OccName
occ
qualName (PprDump NamePprCtx
q)     Module
mod OccName
occ = NamePprCtx -> QueryQualifyName
queryQualifyName NamePprCtx
q Module
mod OccName
occ
qualName PprStyle
_other          Module
mod OccName
_   = ModuleName -> QualifyName
NameQual (Module -> ModuleName
forall a. GenModule a -> ModuleName
moduleName Module
mod)

qualModule :: PprStyle -> QueryQualifyModule
qualModule :: PprStyle -> QueryQualifyModule
qualModule (PprUser NamePprCtx
q Depth
_ Coloured
_)  Module
m = NamePprCtx -> QueryQualifyModule
queryQualifyModule NamePprCtx
q Module
m
qualModule (PprDump NamePprCtx
q)      Module
m = NamePprCtx -> QueryQualifyModule
queryQualifyModule NamePprCtx
q Module
m
qualModule PprStyle
_other          Module
_m = Bool
True

qualPackage :: PprStyle -> QueryQualifyPackage
qualPackage :: PprStyle -> QueryQualifyPackage
qualPackage (PprUser NamePprCtx
q Depth
_ Coloured
_)  Unit
m = NamePprCtx -> QueryQualifyPackage
queryQualifyPackage NamePprCtx
q Unit
m
qualPackage (PprDump NamePprCtx
q)      Unit
m = NamePprCtx -> QueryQualifyPackage
queryQualifyPackage NamePprCtx
q Unit
m
qualPackage PprStyle
_other          Unit
_m = Bool
True

promTick :: PprStyle -> QueryPromotionTick
promTick :: PprStyle -> QueryPromotionTick
promTick (PprUser NamePprCtx
q Depth
_ Coloured
_) PromotedItem
occ = NamePprCtx -> QueryPromotionTick
queryPromotionTick NamePprCtx
q PromotedItem
occ
promTick (PprDump NamePprCtx
q)     PromotedItem
occ = NamePprCtx -> QueryPromotionTick
queryPromotionTick NamePprCtx
q PromotedItem
occ
promTick PprStyle
_               PromotedItem
_   = Bool
True

queryQual :: PprStyle -> NamePprCtx
queryQual :: PprStyle -> NamePprCtx
queryQual PprStyle
s = QueryQualifyName
-> QueryQualifyModule
-> QueryQualifyPackage
-> QueryPromotionTick
-> NamePprCtx
QueryQualify (PprStyle -> QueryQualifyName
qualName PprStyle
s)
                           (PprStyle -> QueryQualifyModule
qualModule PprStyle
s)
                           (PprStyle -> QueryQualifyPackage
qualPackage PprStyle
s)
                           (PprStyle -> QueryPromotionTick
promTick PprStyle
s)

codeStyle :: PprStyle -> Bool
codeStyle :: PprStyle -> Bool
codeStyle PprStyle
PprCode     = Bool
True
codeStyle PprStyle
_           = Bool
False

dumpStyle :: PprStyle -> Bool
dumpStyle :: PprStyle -> Bool
dumpStyle (PprDump {}) = Bool
True
dumpStyle PprStyle
_other       = Bool
False

userStyle ::  PprStyle -> Bool
userStyle :: PprStyle -> Bool
userStyle (PprUser {}) = Bool
True
userStyle PprStyle
_other       = Bool
False

-- | Indicate if -dppr-debug mode is enabled
getPprDebug :: IsOutput doc => (Bool -> doc) -> doc
{-# INLINE CONLIKE getPprDebug #-}
getPprDebug :: forall doc. IsOutput doc => (Bool -> doc) -> doc
getPprDebug Bool -> doc
d = (SDocContext -> doc) -> doc
forall doc. IsOutput doc => (SDocContext -> doc) -> doc
docWithContext ((SDocContext -> doc) -> doc) -> (SDocContext -> doc) -> doc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> Bool -> doc
d (SDocContext -> Bool
sdocPprDebug SDocContext
ctx)

-- | Says what to do with and without -dppr-debug
ifPprDebug :: IsOutput doc => doc -> doc -> doc
{-# INLINE CONLIKE ifPprDebug #-}
ifPprDebug :: forall doc. IsOutput doc => doc -> doc -> doc
ifPprDebug doc
yes doc
no = (Bool -> doc) -> doc
forall doc. IsOutput doc => (Bool -> doc) -> doc
getPprDebug ((Bool -> doc) -> doc) -> (Bool -> doc) -> doc
forall a b. (a -> b) -> a -> b
$ \Bool
dbg -> if Bool
dbg then doc
yes else doc
no

-- | Says what to do with -dppr-debug; without, return empty
whenPprDebug :: IsOutput doc => doc -> doc        -- Empty for non-debug style
{-# INLINE CONLIKE whenPprDebug #-}
whenPprDebug :: forall doc. IsOutput doc => doc -> doc
whenPprDebug doc
d = doc -> doc -> doc
forall doc. IsOutput doc => doc -> doc -> doc
ifPprDebug doc
d doc
forall doc. IsOutput doc => doc
empty

-- | The analog of 'Pretty.printDoc_' for 'SDoc', which tries to make sure the
--   terminal doesn't get screwed up by the ANSI color codes if an exception
--   is thrown during pretty-printing.
printSDoc :: SDocContext -> Mode -> Handle -> SDoc -> IO ()
printSDoc :: SDocContext -> Mode -> Handle -> SDoc -> IO ()
printSDoc SDocContext
ctx Mode
mode Handle
handle SDoc
doc =
  Mode -> Int -> Handle -> Doc -> IO ()
Pretty.printDoc_ Mode
mode Int
cols Handle
handle (SDoc -> SDocContext -> Doc
runSDoc SDoc
doc SDocContext
ctx)
    IO () -> IO () -> IO ()
forall a b. IO a -> IO b -> IO a
`finally`
      Mode -> Int -> Handle -> Doc -> IO ()
Pretty.printDoc_ Mode
mode Int
cols Handle
handle
        (SDoc -> SDocContext -> Doc
runSDoc (PprColour -> SDoc -> SDoc
coloured PprColour
Col.colReset SDoc
forall doc. IsOutput doc => doc
empty) SDocContext
ctx)
  where
    cols :: Int
cols = SDocContext -> Int
sdocLineLength SDocContext
ctx

-- | Like 'printSDoc' but appends an extra newline.
printSDocLn :: SDocContext -> Mode -> Handle -> SDoc -> IO ()
printSDocLn :: SDocContext -> Mode -> Handle -> SDoc -> IO ()
printSDocLn SDocContext
ctx Mode
mode Handle
handle SDoc
doc =
  SDocContext -> Mode -> Handle -> SDoc -> IO ()
printSDoc SDocContext
ctx Mode
mode Handle
handle (SDoc
doc SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"")

-- | An efficient variant of 'printSDoc' specialized for 'LeftMode' that
-- outputs to a 'BufHandle'.
bufLeftRenderSDoc :: SDocContext -> BufHandle -> SDoc -> IO ()
bufLeftRenderSDoc :: SDocContext -> BufHandle -> SDoc -> IO ()
bufLeftRenderSDoc SDocContext
ctx BufHandle
bufHandle SDoc
doc =
  BufHandle -> Doc -> IO ()
Pretty.bufLeftRender BufHandle
bufHandle (SDoc -> SDocContext -> Doc
runSDoc SDoc
doc SDocContext
ctx)

pprCode :: SDoc -> SDoc
{-# INLINE CONLIKE pprCode #-}
pprCode :: SDoc -> SDoc
pprCode SDoc
d = PprStyle -> SDoc -> SDoc
withPprStyle PprStyle
PprCode SDoc
d

renderWithContext :: SDocContext -> SDoc -> String
renderWithContext :: SDocContext -> SDoc -> String
renderWithContext SDocContext
ctx SDoc
sdoc
  = let s :: Style
s = Style
Pretty.style{ Pretty.mode       = PageMode False,
                          Pretty.lineLength = sdocLineLength ctx }
    in Style -> Doc -> String
Pretty.renderStyle Style
s (Doc -> String) -> Doc -> String
forall a b. (a -> b) -> a -> b
$ SDoc -> SDocContext -> Doc
runSDoc SDoc
sdoc SDocContext
ctx

-- This shows an SDoc, but on one line only. It's cheaper than a full
-- showSDoc, designed for when we're getting results like "Foo.bar"
-- and "foo{uniq strictness}" so we don't want fancy layout anyway.
showSDocOneLine :: SDocContext -> SDoc -> String
showSDocOneLine :: SDocContext -> SDoc -> String
showSDocOneLine SDocContext
ctx SDoc
d
 = let s :: Style
s = Style
Pretty.style{ Pretty.mode = OneLineMode,
                         Pretty.lineLength = sdocLineLength ctx } in
   Style -> Doc -> String
Pretty.renderStyle Style
s (Doc -> String) -> Doc -> String
forall a b. (a -> b) -> a -> b
$
      SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx

showSDocUnsafe :: SDoc -> String
showSDocUnsafe :: SDoc -> String
showSDocUnsafe SDoc
sdoc = SDocContext -> SDoc -> String
renderWithContext SDocContext
defaultSDocContext SDoc
sdoc

showPprUnsafe :: Outputable a => a -> String
showPprUnsafe :: forall a. Outputable a => a -> String
showPprUnsafe a
a = SDocContext -> SDoc -> String
renderWithContext SDocContext
defaultSDocContext (a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a)


pprDebugAndThen :: SDocContext -> (String -> a) -> SDoc -> SDoc -> a
pprDebugAndThen :: forall a. SDocContext -> (String -> a) -> SDoc -> SDoc -> a
pprDebugAndThen SDocContext
ctx String -> a
cont SDoc
heading SDoc
pretty_msg
 = String -> a
cont (SDocContext -> SDoc -> String
renderWithContext SDocContext
ctx SDoc
doc)
 where
     doc :: SDoc
doc = PprStyle -> SDoc -> SDoc
withPprStyle PprStyle
defaultDumpStyle ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [SDoc
heading, Int -> SDoc -> SDoc
nest Int
2 SDoc
pretty_msg])


isEmpty :: SDocContext -> SDoc -> Bool
isEmpty :: SDocContext -> SDoc -> Bool
isEmpty SDocContext
ctx SDoc
sdoc = Doc -> Bool
Pretty.isEmpty (Doc -> Bool) -> Doc -> Bool
forall a b. (a -> b) -> a -> b
$ SDoc -> SDocContext -> Doc
runSDoc SDoc
sdoc (SDocContext
ctx {sdocPprDebug = True})

docToSDoc :: Doc -> SDoc
docToSDoc :: Doc -> SDoc
docToSDoc Doc
d = (SDocContext -> Doc) -> SDoc
SDoc (\SDocContext
_ -> Doc
d)

ptext    ::               PtrString  -> SDoc
int      :: IsLine doc => Int        -> doc
integer  :: IsLine doc => Integer    -> doc
word     ::               Integer    -> SDoc
word64   :: IsLine doc => Word64     -> doc
float    :: IsLine doc => Float      -> doc
double   :: IsLine doc => Double     -> doc
rational ::               Rational   -> SDoc

{-# INLINE CONLIKE ptext #-}
ptext :: PtrString -> SDoc
ptext PtrString
s     = Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ PtrString -> Doc
Pretty.ptext PtrString
s
{-# INLINE CONLIKE int #-}
int :: forall doc. IsLine doc => Int -> doc
int Int
n       = String -> doc
forall doc. IsLine doc => String -> doc
text (String -> doc) -> String -> doc
forall a b. (a -> b) -> a -> b
$ Int -> String
forall a. Show a => a -> String
show Int
n
{-# INLINE CONLIKE integer #-}
integer :: forall doc. IsLine doc => Integer -> doc
integer Integer
n   = String -> doc
forall doc. IsLine doc => String -> doc
text (String -> doc) -> String -> doc
forall a b. (a -> b) -> a -> b
$ Integer -> String
forall a. Show a => a -> String
show Integer
n
{-# INLINE CONLIKE float #-}
float :: forall doc. IsLine doc => Float -> doc
float Float
n     = String -> doc
forall doc. IsLine doc => String -> doc
text (String -> doc) -> String -> doc
forall a b. (a -> b) -> a -> b
$ Float -> String
forall a. Show a => a -> String
show Float
n
{-# INLINE CONLIKE double #-}
double :: forall doc. IsLine doc => Double -> doc
double Double
n    = String -> doc
forall doc. IsLine doc => String -> doc
text (String -> doc) -> String -> doc
forall a b. (a -> b) -> a -> b
$ Double -> String
forall a. Show a => a -> String
show Double
n
{-# INLINE CONLIKE rational #-}
rational :: Rational -> SDoc
rational Rational
n  = String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> SDoc) -> String -> SDoc
forall a b. (a -> b) -> a -> b
$ Rational -> String
forall a. Show a => a -> String
show Rational
n
              -- See Note [Print Hexadecimal Literals] in GHC.Utils.Ppr
{-# INLINE CONLIKE word64 #-}
word64 :: forall doc. IsLine doc => Word64 -> doc
word64 Word64
n    = String -> doc
forall doc. IsLine doc => String -> doc
text (String -> doc) -> String -> doc
forall a b. (a -> b) -> a -> b
$ Word64 -> String
forall a. Show a => a -> String
show Word64
n
{-# INLINE CONLIKE word #-}
word :: Integer -> SDoc
word Integer
n      = (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocHexWordLiterals ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
               Bool
True  -> Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ Integer -> Doc
Pretty.hex Integer
n
               Bool
False -> Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ Integer -> Doc
Pretty.integer Integer
n

-- | @doublePrec p n@ shows a floating point number @n@ with @p@
-- digits of precision after the decimal point.
doublePrec :: Int -> Double -> SDoc
doublePrec :: Int -> Double -> SDoc
doublePrec Int
p Double
n = String -> SDoc
forall doc. IsLine doc => String -> doc
text (Maybe Int -> Double -> ShowS
forall a. RealFloat a => Maybe Int -> a -> ShowS
showFFloat (Int -> Maybe Int
forall a. a -> Maybe a
Just Int
p) Double
n String
"")

quotes, quote :: SDoc -> SDoc
parens, brackets, braces, doubleQuotes, angleBrackets :: IsLine doc => doc -> doc

{-# INLINE CONLIKE parens #-}
parens :: forall doc. IsLine doc => doc -> doc
parens doc
d        = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'(' doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
')'
{-# INLINE CONLIKE braces #-}
braces :: forall doc. IsLine doc => doc -> doc
braces doc
d        = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'{' doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'}'
{-# INLINE CONLIKE brackets #-}
brackets :: forall doc. IsLine doc => doc -> doc
brackets doc
d      = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'[' doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
']'
{-# INLINE CONLIKE quote #-}
quote :: SDoc -> SDoc
quote SDoc
d         = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ Doc -> Doc
Pretty.quote (Doc -> Doc) -> (SDocContext -> Doc) -> SDocContext -> Doc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SDoc -> SDocContext -> Doc
runSDoc SDoc
d
{-# INLINE CONLIKE doubleQuotes #-}
doubleQuotes :: forall doc. IsLine doc => doc -> doc
doubleQuotes doc
d  = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'"' doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'"'
{-# INLINE CONLIKE angleBrackets #-}
angleBrackets :: forall doc. IsLine doc => doc -> doc
angleBrackets doc
d = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'<' doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'>'

cparen :: Bool -> SDoc -> SDoc
{-# INLINE CONLIKE cparen #-}
cparen :: Bool -> SDoc -> SDoc
cparen Bool
b SDoc
d = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ Bool -> Doc -> Doc
Pretty.maybeParens Bool
b (Doc -> Doc) -> (SDocContext -> Doc) -> SDocContext -> Doc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SDoc -> SDocContext -> Doc
runSDoc SDoc
d

quoteIfPunsEnabled :: SDoc -> SDoc
quoteIfPunsEnabled :: SDoc -> SDoc
quoteIfPunsEnabled SDoc
doc =
  (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocListTuplePuns ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
    Bool
True -> SDoc -> SDoc
quote SDoc
doc
    Bool
False -> SDoc
doc

-- 'quotes' encloses something in single quotes...
-- but it omits them if the thing begins or ends in a single quote
-- so that we don't get `foo''.  Instead we just have foo'.
quotes :: SDoc -> SDoc
quotes SDoc
d = (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocCanUseUnicode ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
   Bool
True  -> Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'‘' SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'’'
   Bool
False -> (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
sty ->
      let pp_d :: Doc
pp_d = SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
sty
          str :: String
str  = Doc -> String
forall a. Show a => a -> String
show Doc
pp_d
      in case String
str of
         []                   -> Doc -> Doc
Pretty.quotes Doc
pp_d
         Char
'\'' : String
_             -> Doc
pp_d
         String
_ | Just Char
'\'' <- String -> Maybe Char
forall a. [a] -> Maybe a
lastMaybe String
str -> Doc
pp_d
           | Bool
otherwise        -> Doc -> Doc
Pretty.quotes Doc
pp_d

blankLine, dcolon, arrow, lollipop, larrow, darrow, arrowt, larrowt, arrowtt,
  larrowtt, lambda :: SDoc

blankLine :: SDoc
blankLine  = Doc -> SDoc
docToSDoc Doc
Pretty.emptyText
dcolon :: SDoc
dcolon     = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'∷') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"::")
arrow :: SDoc
arrow      = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'→') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"->")
lollipop :: SDoc
lollipop   = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'⊸') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"%1 ->")
larrow :: SDoc
larrow     = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'←') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"<-")
darrow :: SDoc
darrow     = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'⇒') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"=>")
arrowt :: SDoc
arrowt     = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'⤚') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
">-")
larrowt :: SDoc
larrowt    = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'⤙') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"-<")
arrowtt :: SDoc
arrowtt    = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'⤜') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
">>-")
larrowtt :: SDoc
larrowtt   = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'⤛') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"-<<")
lambda :: SDoc
lambda     = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'λ') (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'\\')

semi, comma, colon, equals, space, underscore, dot, vbar :: IsLine doc => doc
lparen, rparen, lbrack, rbrack, lbrace, rbrace :: IsLine doc => doc
semi :: forall doc. IsLine doc => doc
semi       = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
';'
comma :: forall doc. IsLine doc => doc
comma      = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
','
colon :: forall doc. IsLine doc => doc
colon      = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
':'
equals :: forall doc. IsLine doc => doc
equals     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'='
space :: forall doc. IsLine doc => doc
space      = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
' '
underscore :: forall doc. IsLine doc => doc
underscore = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'_'
dot :: forall doc. IsLine doc => doc
dot        = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'.'
vbar :: forall doc. IsLine doc => doc
vbar       = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'|'
lparen :: forall doc. IsLine doc => doc
lparen     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'('
rparen :: forall doc. IsLine doc => doc
rparen     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
')'
lbrack :: forall doc. IsLine doc => doc
lbrack     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'['
rbrack :: forall doc. IsLine doc => doc
rbrack     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
']'
lbrace :: forall doc. IsLine doc => doc
lbrace     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'{'
rbrace :: forall doc. IsLine doc => doc
rbrace     = Char -> doc
forall doc. IsLine doc => Char -> doc
char Char
'}'

forAllLit :: SDoc
forAllLit :: SDoc
forAllLit = SDoc -> SDoc -> SDoc
unicodeSyntax (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'∀') (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"forall")

bullet :: SDoc
bullet :: SDoc
bullet = SDoc -> SDoc -> SDoc
unicode (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'•') (Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'*')

unicodeSyntax :: SDoc -> SDoc -> SDoc
unicodeSyntax :: SDoc -> SDoc -> SDoc
unicodeSyntax SDoc
unicode SDoc
plain =
   (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocCanUseUnicode ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \Bool
can_use_unicode ->
   (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocPrintUnicodeSyntax ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \Bool
print_unicode_syntax ->
    if Bool
can_use_unicode Bool -> Bool -> Bool
&& Bool
print_unicode_syntax
    then SDoc
unicode
    else SDoc
plain

unicode :: SDoc -> SDoc -> SDoc
unicode :: SDoc -> SDoc -> SDoc
unicode SDoc
unicode SDoc
plain = (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocCanUseUnicode ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
   Bool
True  -> SDoc
unicode
   Bool
False -> SDoc
plain

nest :: Int -> SDoc -> SDoc
-- ^ Indent 'SDoc' some specified amount
($+$) :: SDoc -> SDoc -> SDoc
-- ^ Join two 'SDoc' together vertically

{-# INLINE CONLIKE nest #-}
nest :: Int -> SDoc -> SDoc
nest Int
n SDoc
d    = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ Int -> Doc -> Doc
Pretty.nest Int
n (Doc -> Doc) -> (SDocContext -> Doc) -> SDocContext -> Doc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SDoc -> SDocContext -> Doc
runSDoc SDoc
d
{-# INLINE CONLIKE ($+$) #-}
$+$ :: SDoc -> SDoc -> SDoc
($+$) SDoc
d1 SDoc
d2 = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> Doc -> Doc -> Doc
(Pretty.$+$) (SDoc -> SDocContext -> Doc
runSDoc SDoc
d1 SDocContext
ctx) (SDoc -> SDocContext -> Doc
runSDoc SDoc
d2 SDocContext
ctx)

cat :: [SDoc] -> SDoc
-- ^ A paragraph-fill combinator. It's much like sep, only it
-- keeps fitting things on one line until it can't fit any more.
fcat :: [SDoc] -> SDoc
-- ^ This behaves like 'fsep', but it uses '<>' for horizontal composition rather than '<+>'


-- Inline all those wrappers to help ensure we create lists of Doc, not of SDoc
-- later applied to the same SDocContext. It helps the worker/wrapper
-- transformation extracting only the required fields from the SDocContext.
{-# INLINE CONLIKE cat #-}
cat :: [SDoc] -> SDoc
cat [SDoc]
ds  = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.cat  [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]
{-# INLINE CONLIKE fcat #-}
fcat :: [SDoc] -> SDoc
fcat [SDoc]
ds = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.fcat [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]

hang :: SDoc  -- ^ The header
      -> Int  -- ^ Amount to indent the hung body
      -> SDoc -- ^ The hung body, indented and placed below the header
      -> SDoc
{-# INLINE CONLIKE hang #-}
hang :: SDoc -> Int -> SDoc -> SDoc
hang SDoc
d1 Int
n SDoc
d2   = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
sty -> Doc -> Int -> Doc -> Doc
Pretty.hang (SDoc -> SDocContext -> Doc
runSDoc SDoc
d1 SDocContext
sty) Int
n (SDoc -> SDocContext -> Doc
runSDoc SDoc
d2 SDocContext
sty)

-- | This behaves like 'hang', but does not indent the second document
-- when the header is empty.
hangNotEmpty :: SDoc -> Int -> SDoc -> SDoc
{-# INLINE CONLIKE hangNotEmpty #-}
hangNotEmpty :: SDoc -> Int -> SDoc -> SDoc
hangNotEmpty SDoc
d1 Int
n SDoc
d2 =
    (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> Doc -> Int -> Doc -> Doc
Pretty.hangNotEmpty (SDoc -> SDocContext -> Doc
runSDoc SDoc
d1 SDocContext
ctx) Int
n (SDoc -> SDocContext -> Doc
runSDoc SDoc
d2 SDocContext
ctx)

punctuate :: IsLine doc
          => doc   -- ^ The punctuation
          -> [doc] -- ^ The list that will have punctuation added between every adjacent pair of elements
          -> [doc] -- ^ Punctuated list
punctuate :: forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate doc
_ []     = []
punctuate doc
p (doc
d:[doc]
ds) = doc -> [doc] -> [doc]
go doc
d [doc]
ds
                   where
                     go :: doc -> [doc] -> [doc]
go doc
d [] = [doc
d]
                     go doc
d (doc
e:[doc]
es) = (doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
p) doc -> [doc] -> [doc]
forall a. a -> [a] -> [a]
: doc -> [doc] -> [doc]
go doc
e [doc]
es

-- | Punctuate a list, e.g. with commas and dots.
--
-- > sep $ punctuateFinal comma dot [text "ab", text "cd", text "ef"]
-- > ab, cd, ef.
punctuateFinal :: IsLine doc
               => doc   -- ^ The interstitial punctuation
               -> doc   -- ^ The final punctuation
               -> [doc] -- ^ The list that will have punctuation added between every adjacent pair of elements
               -> [doc] -- ^ Punctuated list
punctuateFinal :: forall doc. IsLine doc => doc -> doc -> [doc] -> [doc]
punctuateFinal doc
_ doc
_ []     = []
punctuateFinal doc
p doc
q (doc
d:[doc]
ds) = doc -> [doc] -> [doc]
go doc
d [doc]
ds
  where
    go :: doc -> [doc] -> [doc]
go doc
d [] = [doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
q]
    go doc
d (doc
e:[doc]
es) = (doc
d doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
p) doc -> [doc] -> [doc]
forall a. a -> [a] -> [a]
: doc -> [doc] -> [doc]
go doc
e [doc]
es

ppWhen, ppUnless :: IsOutput doc => Bool -> doc -> doc
{-# INLINE CONLIKE ppWhen #-}
ppWhen :: forall doc. IsOutput doc => Bool -> doc -> doc
ppWhen Bool
True  doc
doc = doc
doc
ppWhen Bool
False doc
_   = doc
forall doc. IsOutput doc => doc
empty

{-# INLINE CONLIKE ppUnless #-}
ppUnless :: forall doc. IsOutput doc => Bool -> doc -> doc
ppUnless Bool
True  doc
_   = doc
forall doc. IsOutput doc => doc
empty
ppUnless Bool
False doc
doc = doc
doc

{-# INLINE CONLIKE ppWhenOption #-}
ppWhenOption :: (SDocContext -> Bool) -> SDoc -> SDoc
ppWhenOption :: (SDocContext -> Bool) -> SDoc -> SDoc
ppWhenOption SDocContext -> Bool
f SDoc
doc = (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
f ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
   Bool
True  -> SDoc
doc
   Bool
False -> SDoc
forall doc. IsOutput doc => doc
empty

{-# INLINE CONLIKE ppUnlessOption #-}
ppUnlessOption :: (SDocContext -> Bool) -> SDoc -> SDoc
ppUnlessOption :: (SDocContext -> Bool) -> SDoc -> SDoc
ppUnlessOption SDocContext -> Bool
f SDoc
doc = (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
f ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
   Bool
True  -> SDoc
forall doc. IsOutput doc => doc
empty
   Bool
False -> SDoc
doc

-- | Apply the given colour\/style for the argument.
--
-- Only takes effect if colours are enabled.
coloured :: Col.PprColour -> SDoc -> SDoc
coloured :: PprColour -> SDoc -> SDoc
coloured PprColour
col SDoc
sdoc = (SDocContext -> Bool) -> (Bool -> SDoc) -> SDoc
forall a. (SDocContext -> a) -> (a -> SDoc) -> SDoc
sdocOption SDocContext -> Bool
sdocShouldUseColor ((Bool -> SDoc) -> SDoc) -> (Bool -> SDoc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
   Bool
True -> (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \case
      ctx :: SDocContext
ctx@SDC{ sdocLastColour :: SDocContext -> PprColour
sdocLastColour = PprColour
lastCol, sdocStyle :: SDocContext -> PprStyle
sdocStyle = PprUser NamePprCtx
_ Depth
_ Coloured
Coloured } ->
         let ctx' :: SDocContext
ctx' = SDocContext
ctx{ sdocLastColour = lastCol `mappend` col } in
         String -> Doc
Pretty.zeroWidthText (PprColour -> String
Col.renderColour PprColour
col)
           Doc -> Doc -> Doc
Pretty.<> SDoc -> SDocContext -> Doc
runSDoc SDoc
sdoc SDocContext
ctx'
           Doc -> Doc -> Doc
Pretty.<> String -> Doc
Pretty.zeroWidthText (PprColour -> String
Col.renderColourAfresh PprColour
lastCol)
      SDocContext
ctx -> SDoc -> SDocContext -> Doc
runSDoc SDoc
sdoc SDocContext
ctx
   Bool
False -> SDoc
sdoc

keyword :: SDoc -> SDoc
keyword :: SDoc -> SDoc
keyword = PprColour -> SDoc -> SDoc
coloured PprColour
Col.colBold

-----------------------------------------------------------------------
-- The @Outputable@ class
-----------------------------------------------------------------------

-- | Class designating that some type has an 'SDoc' representation
class Outputable a where
    ppr :: a -> SDoc

-- There's no Outputable for Char; it's too easy to use Outputable
-- on String and have ppr "hello" rendered as "h,e,l,l,o".

instance Outputable Void where
    ppr :: Void -> SDoc
ppr Void
_ = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"<<Void>>"

instance Outputable Bool where
    ppr :: Bool -> SDoc
ppr Bool
True  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"True"
    ppr Bool
False = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"False"

instance Outputable Ordering where
    ppr :: Ordering -> SDoc
ppr Ordering
LT = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"LT"
    ppr Ordering
EQ = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"EQ"
    ppr Ordering
GT = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"GT"

instance Outputable Int8 where
   ppr :: Int8 -> SDoc
ppr Int8
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Int8 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int8
n

instance Outputable Int16 where
   ppr :: Int16 -> SDoc
ppr Int16
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Int16 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int16
n

instance Outputable Int32 where
   ppr :: Int32 -> SDoc
ppr Int32
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Int32 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int32
n

instance Outputable Int64 where
   ppr :: Int64 -> SDoc
ppr Int64
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Int64 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int64
n

instance Outputable Int where
    ppr :: Int -> SDoc
ppr Int
n = Int -> SDoc
forall doc. IsLine doc => Int -> doc
int Int
n

instance Outputable Integer where
    ppr :: Integer -> SDoc
ppr Integer
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer Integer
n

instance Outputable Word8 where
    ppr :: Word8 -> SDoc
ppr Word8
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Word8 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Word8
n

instance Outputable Word16 where
    ppr :: Word16 -> SDoc
ppr Word16
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Word16 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Word16
n

instance Outputable Word32 where
    ppr :: Word32 -> SDoc
ppr Word32
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Word32 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Word32
n

instance Outputable Word64 where
    ppr :: Word64 -> SDoc
ppr Word64
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Word64 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Word64
n

instance Outputable Word where
    ppr :: Word -> SDoc
ppr Word
n = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer (Integer -> SDoc) -> Integer -> SDoc
forall a b. (a -> b) -> a -> b
$ Word -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral Word
n

instance Outputable Float where
    ppr :: Float -> SDoc
ppr Float
f = Float -> SDoc
forall doc. IsLine doc => Float -> doc
float Float
f

instance Outputable Double where
    ppr :: Double -> SDoc
ppr Double
f = Double -> SDoc
forall doc. IsLine doc => Double -> doc
double Double
f

instance Outputable () where
    ppr :: () -> SDoc
ppr ()
_ = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"()"

instance Outputable UTCTime where
    ppr :: UTCTime -> SDoc
ppr = String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> SDoc) -> (UTCTime -> String) -> UTCTime -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Format UTCTime -> UTCTime -> String
forall t. Format t -> t -> String
formatShow Format UTCTime
forall t. ISO8601 t => Format t
iso8601Format

instance (Outputable a) => Outputable [a] where
    ppr :: [a] -> SDoc
ppr [a]
xs = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
brackets ((a -> SDoc) -> [a] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas a -> SDoc
forall a. Outputable a => a -> SDoc
ppr [a]
xs)

instance (Outputable a) => Outputable (NonEmpty a) where
    ppr :: NonEmpty a -> SDoc
ppr = [a] -> SDoc
forall a. Outputable a => a -> SDoc
ppr ([a] -> SDoc) -> (NonEmpty a -> [a]) -> NonEmpty a -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. NonEmpty a -> [a]
forall a. NonEmpty a -> [a]
NEL.toList

instance (Outputable a, Outputable b) => Outputable (Arg a b) where
    ppr :: Arg a b -> SDoc
ppr (Arg a
a b
b) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"Arg" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
b

instance (Outputable a) => Outputable (Set a) where
    ppr :: Set a -> SDoc
ppr Set a
s = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
braces ((a -> SDoc) -> [a] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas a -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Set a -> [a]
forall a. Set a -> [a]
Set.toList Set a
s))

instance Outputable Word64Set.Word64Set where
    ppr :: Word64Set -> SDoc
ppr Word64Set
s = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
braces ((Word64 -> SDoc) -> [Word64] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas Word64 -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Word64Set -> [Word64]
Word64Set.toList Word64Set
s))

instance Outputable IntSet.IntSet where
    ppr :: IntSet -> SDoc
ppr IntSet
s = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
braces ((Int -> SDoc) -> [Int] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas Int -> SDoc
forall a. Outputable a => a -> SDoc
ppr (IntSet -> [Int]
IntSet.toList IntSet
s))

instance (Outputable a, Outputable b) => Outputable (a, b) where
    ppr :: (a, b) -> SDoc
ppr (a
x,b
y) = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
x SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma, b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
y])

instance Outputable a => Outputable (Maybe a) where
    ppr :: Maybe a -> SDoc
ppr Maybe a
Nothing  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"Nothing"
    ppr (Just a
x) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"Just" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
x

instance (Outputable a, Outputable b) => Outputable (Either a b) where
    ppr :: Either a b -> SDoc
ppr (Left a
x)  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"Left"  SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
x
    ppr (Right b
y) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"Right" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
y

-- ToDo: may not be used
instance (Outputable a, Outputable b, Outputable c) => Outputable (a, b, c) where
    ppr :: (a, b, c) -> SDoc
ppr (a
x,b
y,c
z) =
      SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
x SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
y SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   c -> SDoc
forall a. Outputable a => a -> SDoc
ppr c
z ])

instance (Outputable a, Outputable b, Outputable c, Outputable d) =>
         Outputable (a, b, c, d) where
    ppr :: (a, b, c, d) -> SDoc
ppr (a
a,b
b,c
c,d
d) =
      SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
b SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   c -> SDoc
forall a. Outputable a => a -> SDoc
ppr c
c SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   d -> SDoc
forall a. Outputable a => a -> SDoc
ppr d
d])

instance (Outputable a, Outputable b, Outputable c, Outputable d, Outputable e) =>
         Outputable (a, b, c, d, e) where
    ppr :: (a, b, c, d, e) -> SDoc
ppr (a
a,b
b,c
c,d
d,e
e) =
      SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
b SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   c -> SDoc
forall a. Outputable a => a -> SDoc
ppr c
c SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   d -> SDoc
forall a. Outputable a => a -> SDoc
ppr d
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   e -> SDoc
forall a. Outputable a => a -> SDoc
ppr e
e])

instance (Outputable a, Outputable b, Outputable c, Outputable d, Outputable e, Outputable f) =>
         Outputable (a, b, c, d, e, f) where
    ppr :: (a, b, c, d, e, f) -> SDoc
ppr (a
a,b
b,c
c,d
d,e
e,f
f) =
      SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
b SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   c -> SDoc
forall a. Outputable a => a -> SDoc
ppr c
c SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   d -> SDoc
forall a. Outputable a => a -> SDoc
ppr d
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   e -> SDoc
forall a. Outputable a => a -> SDoc
ppr e
e SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   f -> SDoc
forall a. Outputable a => a -> SDoc
ppr f
f])

instance (Outputable a, Outputable b, Outputable c, Outputable d, Outputable e, Outputable f, Outputable g) =>
         Outputable (a, b, c, d, e, f, g) where
    ppr :: (a, b, c, d, e, f, g) -> SDoc
ppr (a
a,b
b,c
c,d
d,e
e,f
f,g
g) =
      SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep [a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   b -> SDoc
forall a. Outputable a => a -> SDoc
ppr b
b SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   c -> SDoc
forall a. Outputable a => a -> SDoc
ppr c
c SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   d -> SDoc
forall a. Outputable a => a -> SDoc
ppr d
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   e -> SDoc
forall a. Outputable a => a -> SDoc
ppr e
e SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   f -> SDoc
forall a. Outputable a => a -> SDoc
ppr f
f SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma,
                   g -> SDoc
forall a. Outputable a => a -> SDoc
ppr g
g])

instance Outputable FastString where
    ppr :: FastString -> SDoc
ppr FastString
fs = FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext FastString
fs           -- Prints an unadorned string,
                                -- no double quotes or anything

deriving newtype instance Outputable NonDetFastString
deriving newtype instance Outputable LexicalFastString

instance (Outputable key, Outputable elt) => Outputable (M.Map key elt) where
    ppr :: Map key elt -> SDoc
ppr Map key elt
m = [(key, elt)] -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Map key elt -> [(key, elt)]
forall k a. Map k a -> [(k, a)]
M.toList Map key elt
m)

instance (Outputable elt) => Outputable (IM.IntMap elt) where
    ppr :: IntMap elt -> SDoc
ppr IntMap elt
m = [(Int, elt)] -> SDoc
forall a. Outputable a => a -> SDoc
ppr (IntMap elt -> [(Int, elt)]
forall a. IntMap a -> [(Int, a)]
IM.toList IntMap elt
m)

instance Outputable Fingerprint where
    ppr :: Fingerprint -> SDoc
ppr (Fingerprint Word64
w1 Word64
w2) = String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> Word64 -> Word64 -> String
forall r. PrintfType r => String -> r
printf String
"%016x%016x" Word64
w1 Word64
w2)

instance Outputable a => Outputable (SCC a) where
   ppr :: SCC a -> SDoc
ppr (AcyclicSCC a
v) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"NONREC" SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ (Int -> SDoc -> SDoc
nest Int
3 (a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
v))
   ppr (CyclicSCC [a]
vs) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"REC" SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ (Int -> SDoc -> SDoc
nest Int
3 ([SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
forall a. Outputable a => a -> SDoc
ppr [a]
vs)))

instance Outputable Serialized where
    ppr :: Serialized -> SDoc
ppr (Serialized TypeRep
the_type [Word8]
bytes) = Int -> SDoc
forall doc. IsLine doc => Int -> doc
int ([Word8] -> Int
forall a. [a] -> Int
forall (t :: * -> *) a. Foldable t => t a -> Int
length [Word8]
bytes) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"of type" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text (TypeRep -> String
forall a. Show a => a -> String
show TypeRep
the_type)

instance Outputable Extension where
    ppr :: Extension -> SDoc
ppr = String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> SDoc) -> (Extension -> String) -> Extension -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Extension -> String
forall a. Show a => a -> String
show

instance Outputable ModuleName where
  ppr :: ModuleName -> SDoc
ppr = ModuleName -> SDoc
forall doc. IsLine doc => ModuleName -> doc
pprModuleName

pprModuleName :: IsLine doc => ModuleName -> doc
pprModuleName :: forall doc. IsLine doc => ModuleName -> doc
pprModuleName (ModuleName FastString
nm) =
    doc -> (PprStyle -> SDoc) -> doc
forall doc. IsOutput doc => doc -> (PprStyle -> SDoc) -> doc
docWithStyle (FastZString -> doc
forall doc. IsLine doc => FastZString -> doc
ztext (FastString -> FastZString
zEncodeFS FastString
nm)) (\PprStyle
_ -> FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext FastString
nm)
{-# SPECIALIZE pprModuleName :: ModuleName -> SDoc #-}
{-# SPECIALIZE pprModuleName :: ModuleName -> HLine #-} -- see Note [SPECIALIZE to HDoc]

-----------------------------------------------------------------------
-- The @OutputableP@ class
-----------------------------------------------------------------------

-- Note [The OutputableP class]
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
-- SDoc has become the common type to
--    * display messages in the terminal
--    * dump outputs (Cmm, Asm, C, etc.)
--    * return messages to ghc-api clients
--
-- SDoc is a kind of state Monad: SDoc ~ State SDocContext Doc
-- I.e. to render a SDoc, a SDocContext must be provided.
--
-- SDocContext contains legit rendering options (e.g., line length, color and
-- unicode settings). Sadly SDocContext ended up also being used to thread
-- values that were considered bothersome to thread otherwise:
--    * current HomeModule: to decide if module names must be printed qualified
--    * current UnitState: to print unit-ids as "packagename-version:component"
--    * target platform: to render labels, instructions, etc.
--    * selected backend: to display CLabel as C labels or Asm labels
--
-- In fact the whole compiler session state that is DynFlags was passed in
-- SDocContext and these values were retrieved from it.
--
-- The Outputable class makes SDoc creation easy for many values by providing
-- the ppr method:
--
--    class Outputable a where
--       ppr :: a -> SDoc
--
-- Almost every type is Outputable in the compiler and it seems great because it
-- is similar to the Show class. But it's a fallacious simplicity because `SDoc`
-- needs a `SDocContext` to be transformed into a renderable `Doc`: who is going
-- to provide the SDocContext with the correct values in it?
--
--    E.g. if a SDoc is returned in an exception, how could we know the home
--    module at the time it was thrown?
--
-- A workaround is to pass dummy values (no home module, empty UnitState) at SDoc
-- rendering time and to hope that the code that produced the SDoc has updated
-- the SDocContext with meaningful values (e.g. using withPprStyle or
-- pprWithUnitState). If the context isn't correctly updated, a dummy value is
-- used and the printed result isn't what we expected. Note that the compiler
-- doesn't help us finding spots where we need to update the SDocContext.
--
-- In some cases we can't pass a dummy value because we can't create one. For
-- example, how can we create a dummy Platform value? In the old days, GHC only
-- supported a single Platform set when it was built, so we could use it without
-- any risk of mistake. But now GHC starts supporting several Platform in the
-- same session so it becomes an issue. We could be tempted to use the
-- workaround described above by using "undefined" as a dummy Platform value.
-- However in this case, if we forget to update it we will get a runtime
-- error/crash. We could use "Maybe Platform" and die with a better error
-- message at places where we really really need to know if we are on Windows or
-- not, or if we use 32- or 64-bit. Still the compiler would not help us in
-- finding spots where to update the context with a valid Platform.
--
-- So finally here comes the OutputableP class:
--
--    class OutputableP env a where
--       pdoc :: env -> a -> SDoc
--
-- OutputableP forces us to thread an environment necessary to print a value.
-- For now we only use it to thread a Platform environment, so we have several
-- "Outputable Platform XYZ" instances. In the future we could imagine using a
-- Has class to retrieve a value from a generic environment to make the code
-- more composable. E.g.:
--
--    instance Has Platform env => OutputableP env XYZ where
--       pdoc env a = ... (getter env :: Platform)
--
-- A drawback of this approach over Outputable is that we have to thread an
-- environment explicitly to use "pdoc" and it's more cumbersome. But it's the
-- price to pay to have some help from the compiler to ensure that we... thread
-- an environment down to the places where we need it, i.e. where SDoc are
-- created (not rendered). On the other hand, it makes life easier for SDoc
-- renderers as they only have to deal with pretty-printing related options in
-- SDocContext.
--
-- TODO:
--
-- 1) we could use OutputableP to thread a UnitState and replace the Outputable
-- instance of UnitId with:
--
--       instance OutputableP UnitState UnitId where ...
--
--    This would allow the removal of the `sdocUnitIdForUser` field.
--
--    Be warned: I've tried to do it, but there are A LOT of other Outputable
--    instances depending on UnitId's one. In particular:
--       UnitId <- Unit <- Module <- Name <- Var <- Core.{Type,Expr} <- ...
--
-- 2) Use it to pass the HomeModule (but I fear it will be as difficult as for
-- UnitId).
--
--

-- | Outputable class with an additional environment value
--
-- See Note [The OutputableP class]
class OutputableP env a where
   pdoc :: env -> a -> SDoc

-- | Wrapper for types having a Outputable instance when an OutputableP instance
-- is required.
newtype PDoc a = PDoc a

instance Outputable a => OutputableP env (PDoc a) where
   pdoc :: env -> PDoc a -> SDoc
pdoc env
_ (PDoc a
a) = a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
a

instance OutputableP env a => OutputableP env [a] where
   pdoc :: env -> [a] -> SDoc
pdoc env
env [a]
xs = [SDoc] -> SDoc
forall a. Outputable a => a -> SDoc
ppr ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (env -> a -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env) [a]
xs)

instance OutputableP env a => OutputableP env (Maybe a) where
   pdoc :: env -> Maybe a -> SDoc
pdoc env
env Maybe a
xs = Maybe SDoc -> SDoc
forall a. Outputable a => a -> SDoc
ppr ((a -> SDoc) -> Maybe a -> Maybe SDoc
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (env -> a -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env) Maybe a
xs)

instance OutputableP env () where
   pdoc :: env -> () -> SDoc
pdoc env
_ ()
_ = () -> SDoc
forall a. Outputable a => a -> SDoc
ppr ()

instance (OutputableP env a, OutputableP env b) => OutputableP env (a, b) where
    pdoc :: env -> (a, b) -> SDoc
pdoc env
env (a
a,b
b) = (SDoc, SDoc) -> SDoc
forall a. Outputable a => a -> SDoc
ppr (env -> a -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env a
a, env -> b -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env b
b)

instance (OutputableP env a, OutputableP env b, OutputableP env c) => OutputableP env (a, b, c) where
    pdoc :: env -> (a, b, c) -> SDoc
pdoc env
env (a
a,b
b,c
c) = (SDoc, SDoc, SDoc) -> SDoc
forall a. Outputable a => a -> SDoc
ppr (env -> a -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env a
a, env -> b -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env b
b, env -> c -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env c
c)


instance (OutputableP env key, OutputableP env elt) => OutputableP env (M.Map key elt) where
    pdoc :: env -> Map key elt -> SDoc
pdoc env
env Map key elt
m = [(SDoc, SDoc)] -> SDoc
forall a. Outputable a => a -> SDoc
ppr ([(SDoc, SDoc)] -> SDoc) -> [(SDoc, SDoc)] -> SDoc
forall a b. (a -> b) -> a -> b
$ ((key, elt) -> (SDoc, SDoc)) -> [(key, elt)] -> [(SDoc, SDoc)]
forall a b. (a -> b) -> [a] -> [b]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (\(key
x,elt
y) -> (env -> key -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env key
x, env -> elt -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env elt
y)) ([(key, elt)] -> [(SDoc, SDoc)]) -> [(key, elt)] -> [(SDoc, SDoc)]
forall a b. (a -> b) -> a -> b
$ Map key elt -> [(key, elt)]
forall k a. Map k a -> [(k, a)]
M.toList Map key elt
m

instance OutputableP env a => OutputableP env (SCC a) where
   pdoc :: env -> SCC a -> SDoc
pdoc env
env SCC a
scc = SCC SDoc -> SDoc
forall a. Outputable a => a -> SDoc
ppr ((a -> SDoc) -> SCC a -> SCC SDoc
forall a b. (a -> b) -> SCC a -> SCC b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (env -> a -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env) SCC a
scc)

instance OutputableP env SDoc where
   pdoc :: env -> SDoc -> SDoc
pdoc env
_ SDoc
x = SDoc
x

instance (OutputableP env a) => OutputableP env (Set a) where
    pdoc :: env -> Set a -> SDoc
pdoc env
env Set a
s = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
braces ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
fsep (SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
comma ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (env -> a -> SDoc
forall env a. OutputableP env a => env -> a -> SDoc
pdoc env
env) (Set a -> [a]
forall a. Set a -> [a]
Set.toList Set a
s))))

instance OutputableP env Void where
    pdoc :: env -> Void -> SDoc
pdoc env
_ = \ case

{-
************************************************************************
*                                                                      *
\subsection{The @OutputableBndr@ class}
*                                                                      *
************************************************************************
-}

-- | When we print a binder, we often want to print its type too.
-- The @OutputableBndr@ class encapsulates this idea.
class Outputable a => OutputableBndr a where
   pprBndr :: BindingSite -> a -> SDoc
   pprBndr BindingSite
_b a
x = a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
x

   pprPrefixOcc, pprInfixOcc :: a -> SDoc
      -- Print an occurrence of the name, suitable either in the
      -- prefix position of an application, thus   (f a b) or  ((+) x)
      -- or infix position,                 thus   (a `f` b) or  (x + y)

   bndrIsJoin_maybe :: a -> JoinPointHood
   bndrIsJoin_maybe a
_ = JoinPointHood
NotJoinPoint
      -- When pretty-printing we sometimes want to find
      -- whether the binder is a join point.  You might think
      -- we could have a function of type (a->Var), but Var
      -- isn't available yet, alas

-- | 'BindingSite' is used to tell the thing that prints binder what
-- language construct is binding the identifier.  This can be used
-- to decide how much info to print.
-- Also see Note [Binding-site specific printing] in "GHC.Core.Ppr"
data BindingSite
    = LambdaBind  -- ^ The x in   (\x. e)
    | CaseBind    -- ^ The x in   case scrut of x { (y,z) -> ... }
    | CasePatBind -- ^ The y,z in case scrut of x { (y,z) -> ... }
    | LetBind     -- ^ The x in   (let x = rhs in e)
    deriving BindingSite -> BindingSite -> Bool
(BindingSite -> BindingSite -> Bool)
-> (BindingSite -> BindingSite -> Bool) -> Eq BindingSite
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: BindingSite -> BindingSite -> Bool
== :: BindingSite -> BindingSite -> Bool
$c/= :: BindingSite -> BindingSite -> Bool
/= :: BindingSite -> BindingSite -> Bool
Eq

data JoinPointHood
  = JoinPoint {-# UNPACK #-} !Int   -- The JoinArity (but an Int here because
  | NotJoinPoint                    -- synonym JoinArity is defined in Types.Basic)
  deriving( JoinPointHood -> JoinPointHood -> Bool
(JoinPointHood -> JoinPointHood -> Bool)
-> (JoinPointHood -> JoinPointHood -> Bool) -> Eq JoinPointHood
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: JoinPointHood -> JoinPointHood -> Bool
== :: JoinPointHood -> JoinPointHood -> Bool
$c/= :: JoinPointHood -> JoinPointHood -> Bool
/= :: JoinPointHood -> JoinPointHood -> Bool
Eq )

isJoinPoint :: JoinPointHood -> Bool
isJoinPoint :: JoinPointHood -> Bool
isJoinPoint (JoinPoint {}) = Bool
True
isJoinPoint JoinPointHood
NotJoinPoint   = Bool
False

instance Outputable JoinPointHood where
  ppr :: JoinPointHood -> SDoc
ppr JoinPointHood
NotJoinPoint      = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"NotJoinPoint"
  ppr (JoinPoint Int
arity) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"JoinPoint" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens (Int -> SDoc
forall a. Outputable a => a -> SDoc
ppr Int
arity)

instance NFData JoinPointHood where
  rnf :: JoinPointHood -> ()
rnf JoinPointHood
x = JoinPointHood
x JoinPointHood -> () -> ()
forall a b. a -> b -> b
`seq` ()

{-
************************************************************************
*                                                                      *
\subsection{Random printing helpers}
*                                                                      *
************************************************************************
-}

-- We have 31-bit Chars and will simply use Show instances of Char and String.

-- | Special combinator for showing character literals.
pprHsChar :: Char -> SDoc
pprHsChar :: Char -> SDoc
pprHsChar Char
c | Char
c Char -> Char -> Bool
forall a. Ord a => a -> a -> Bool
> Char
'\x10ffff' = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'\\' SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> SDoc
forall doc. IsLine doc => String -> doc
text (Word32 -> String
forall a. Show a => a -> String
show (Int -> Word32
forall a b. (Integral a, Num b) => a -> b
fromIntegral (Char -> Int
ord Char
c) :: Word32))
            | Bool
otherwise      = String -> SDoc
forall doc. IsLine doc => String -> doc
text (Char -> String
forall a. Show a => a -> String
show Char
c)

-- | Special combinator for showing string literals.
pprHsString :: FastString -> SDoc
pprHsString :: FastString -> SDoc
pprHsString FastString
fs = [SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat ((String -> SDoc) -> [String] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> [String]
showMultiLineString (FastString -> String
unpackFS FastString
fs)))

-- | Special combinator for showing bytestring literals.
pprHsBytes :: ByteString -> SDoc
pprHsBytes :: ByteString -> SDoc
pprHsBytes ByteString
bs = let escaped :: String
escaped = (Word8 -> String) -> [Word8] -> String
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap Word8 -> String
escape ([Word8] -> String) -> [Word8] -> String
forall a b. (a -> b) -> a -> b
$ ByteString -> [Word8]
BS.unpack ByteString
bs
                in [SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat ((String -> SDoc) -> [String] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> [String]
showMultiLineString String
escaped)) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'#'
    where escape :: Word8 -> String
          escape :: Word8 -> String
escape Word8
w = let c :: Char
c = Int -> Char
chr (Word8 -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral Word8
w)
                     in if Char -> Bool
isAscii Char
c
                        then [Char
c]
                        else Char
'\\' Char -> ShowS
forall a. a -> [a] -> [a]
: Word8 -> String
forall a. Show a => a -> String
show Word8
w

-- Postfix modifiers for unboxed literals.
-- See Note [Printing of literals in Core] in "GHC.Types.Literal".
primCharSuffix, primFloatSuffix, primDoubleSuffix,
  primIntSuffix, primWordSuffix,
  primInt8Suffix, primWord8Suffix,
  primInt16Suffix, primWord16Suffix,
  primInt32Suffix, primWord32Suffix,
  primInt64Suffix, primWord64Suffix
  :: SDoc
primCharSuffix :: SDoc
primCharSuffix   = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'#'
primFloatSuffix :: SDoc
primFloatSuffix  = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'#'
primIntSuffix :: SDoc
primIntSuffix    = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'#'
primDoubleSuffix :: SDoc
primDoubleSuffix = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"##"
primWordSuffix :: SDoc
primWordSuffix   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"##"
primInt8Suffix :: SDoc
primInt8Suffix   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Int8"
primWord8Suffix :: SDoc
primWord8Suffix  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Word8"
primInt16Suffix :: SDoc
primInt16Suffix  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Int16"
primWord16Suffix :: SDoc
primWord16Suffix = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Word16"
primInt32Suffix :: SDoc
primInt32Suffix  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Int32"
primWord32Suffix :: SDoc
primWord32Suffix = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Word32"
primInt64Suffix :: SDoc
primInt64Suffix  = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Int64"
primWord64Suffix :: SDoc
primWord64Suffix = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"#Word64"

-- | Special combinator for showing unboxed literals.
pprPrimChar :: Char -> SDoc
pprPrimInt, pprPrimWord,
  pprPrimInt8, pprPrimWord8,
  pprPrimInt16, pprPrimWord16,
  pprPrimInt32, pprPrimWord32,
  pprPrimInt64, pprPrimWord64
  :: Integer -> SDoc
pprPrimChar :: Char -> SDoc
pprPrimChar Char
c   = Char -> SDoc
pprHsChar Char
c SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primCharSuffix
pprPrimInt :: Integer -> SDoc
pprPrimInt Integer
i    = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer Integer
i   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primIntSuffix
pprPrimWord :: Integer -> SDoc
pprPrimWord Integer
w   = Integer -> SDoc
word    Integer
w   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primWordSuffix
pprPrimInt8 :: Integer -> SDoc
pprPrimInt8 Integer
i   = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer Integer
i   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primInt8Suffix
pprPrimInt16 :: Integer -> SDoc
pprPrimInt16 Integer
i  = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer Integer
i   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primInt16Suffix
pprPrimInt32 :: Integer -> SDoc
pprPrimInt32 Integer
i  = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer Integer
i   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primInt32Suffix
pprPrimInt64 :: Integer -> SDoc
pprPrimInt64 Integer
i  = Integer -> SDoc
forall doc. IsLine doc => Integer -> doc
integer Integer
i   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primInt64Suffix
pprPrimWord8 :: Integer -> SDoc
pprPrimWord8 Integer
w  = Integer -> SDoc
word    Integer
w   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primWord8Suffix
pprPrimWord16 :: Integer -> SDoc
pprPrimWord16 Integer
w = Integer -> SDoc
word    Integer
w   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primWord16Suffix
pprPrimWord32 :: Integer -> SDoc
pprPrimWord32 Integer
w = Integer -> SDoc
word    Integer
w   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primWord32Suffix
pprPrimWord64 :: Integer -> SDoc
pprPrimWord64 Integer
w = Integer -> SDoc
word    Integer
w   SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
primWord64Suffix

---------------------
-- Put a name in parens if it's an operator
pprPrefixVar :: Bool -> SDoc -> SDoc
pprPrefixVar :: Bool -> SDoc -> SDoc
pprPrefixVar Bool
is_operator SDoc
pp_v
  | Bool
is_operator = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens SDoc
pp_v
  | Bool
otherwise   = SDoc
pp_v

-- Put a name in backquotes if it's not an operator
pprInfixVar :: Bool -> SDoc -> SDoc
pprInfixVar :: Bool -> SDoc -> SDoc
pprInfixVar Bool
is_operator SDoc
pp_v
  | Bool
is_operator = SDoc
pp_v
  | Bool
otherwise   = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'`' SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
pp_v SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'`'

---------------------
pprFastFilePath :: FastString -> SDoc
pprFastFilePath :: FastString -> SDoc
pprFastFilePath FastString
path = String -> SDoc
forall doc. IsLine doc => String -> doc
text (String -> SDoc) -> String -> SDoc
forall a b. (a -> b) -> a -> b
$ ShowS
normalise ShowS -> ShowS
forall a b. (a -> b) -> a -> b
$ FastString -> String
unpackFS FastString
path

-- | Normalise, escape and render a string representing a path
--
-- e.g. "c:\\whatever"
pprFilePathString :: IsLine doc => FilePath -> doc
pprFilePathString :: forall doc. IsLine doc => String -> doc
pprFilePathString String
path = doc -> doc
forall doc. IsLine doc => doc -> doc
doubleQuotes (doc -> doc) -> doc -> doc
forall a b. (a -> b) -> a -> b
$ String -> doc
forall doc. IsLine doc => String -> doc
text (ShowS
escape (ShowS
normalise String
path))
   where
      escape :: ShowS
escape []        = []
      escape (Char
'\\':String
xs) = Char
'\\'Char -> ShowS
forall a. a -> [a] -> [a]
:Char
'\\'Char -> ShowS
forall a. a -> [a] -> [a]
:ShowS
escape String
xs
      escape (Char
x:String
xs)    = Char
xChar -> ShowS
forall a. a -> [a] -> [a]
:ShowS
escape String
xs
{-# SPECIALIZE pprFilePathString :: FilePath -> SDoc #-}
{-# SPECIALIZE pprFilePathString :: FilePath -> HLine #-} -- see Note [SPECIALIZE to HDoc]

{-
************************************************************************
*                                                                      *
\subsection{Other helper functions}
*                                                                      *
************************************************************************
-}

pprWithCommas :: (a -> SDoc) -- ^ The pretty printing function to use
              -> [a]         -- ^ The things to be pretty printed
              -> SDoc        -- ^ 'SDoc' where the things have been pretty printed,
                             -- comma-separated and finally packed into a paragraph.
pprWithCommas :: forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas a -> SDoc
pp [a]
xs = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
fsep (SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
comma ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
pp [a]
xs))

pprWithSemis :: (a -> SDoc) -- ^ The pretty printing function to use
              -> [a]         -- ^ The things to be pretty printed
              -> SDoc        -- ^ 'SDoc' where the things have been pretty printed,
                             -- semicolon-separated and finally packed into a paragraph.
pprWithSemis :: forall a. (a -> SDoc) -> [a] -> SDoc
pprWithSemis a -> SDoc
pp [a]
xs = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
fsep (SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
semi ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
pp [a]
xs))

pprWithBars :: (a -> SDoc) -- ^ The pretty printing function to use
            -> [a]         -- ^ The things to be pretty printed
            -> SDoc        -- ^ 'SDoc' where the things have been pretty printed,
                           -- bar-separated and finally packed into a paragraph.
pprWithBars :: forall a. (a -> SDoc) -> [a] -> SDoc
pprWithBars a -> SDoc
pp [a]
xs = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
fsep (SDoc -> [SDoc] -> [SDoc]
forall a. a -> [a] -> [a]
intersperse SDoc
forall doc. IsLine doc => doc
vbar ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
pp [a]
xs))

-- Prefix the document with a space if it starts with a single quote.
-- See Note [Printing promoted type constructors] in GHC.Iface.Type
spaceIfSingleQuote :: SDoc -> SDoc
spaceIfSingleQuote :: SDoc -> SDoc
spaceIfSingleQuote (SDoc SDocContext -> Doc
m) =
  (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx ->
    let (Maybe Char
mHead, Doc
d) = Doc -> (Maybe Char, Doc)
Pretty.docHead (SDocContext -> Doc
m SDocContext
ctx)
    in if Maybe Char
mHead Maybe Char -> Maybe Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char -> Maybe Char
forall a. a -> Maybe a
Just Char
'\''
       then Doc
Pretty.space Doc -> Doc -> Doc
Pretty.<> Doc
d
       else Doc
d

-- | Returns the separated concatenation of the pretty printed things.
interppSP  :: Outputable a => [a] -> SDoc
interppSP :: forall a. Outputable a => [a] -> SDoc
interppSP  [a]
xs = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
forall a. Outputable a => a -> SDoc
ppr [a]
xs)

-- | Returns the comma-separated concatenation of the pretty printed things.
interpp'SP :: Outputable a => [a] -> SDoc
interpp'SP :: forall a. Outputable a => [a] -> SDoc
interpp'SP [a]
xs = (a -> SDoc) -> [a] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
interpp'SP' a -> SDoc
forall a. Outputable a => a -> SDoc
ppr [a]
xs

interpp'SP' :: (a -> SDoc) -> [a] -> SDoc
interpp'SP' :: forall a. (a -> SDoc) -> [a] -> SDoc
interpp'SP' a -> SDoc
f [a]
xs = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep (SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
comma ((a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
f [a]
xs))

-- | Returns the comma-separated concatenation of the quoted pretty printed things.
--
-- > [x,y,z]  ==>  `x', `y', `z'
pprQuotedList :: Outputable a => [a] -> SDoc
pprQuotedList :: forall a. Outputable a => [a] -> SDoc
pprQuotedList = [SDoc] -> SDoc
quotedList ([SDoc] -> SDoc) -> ([a] -> [SDoc]) -> [a] -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (a -> SDoc) -> [a] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map a -> SDoc
forall a. Outputable a => a -> SDoc
ppr

quotedList :: [SDoc] -> SDoc
quotedList :: [SDoc] -> SDoc
quotedList [SDoc]
xs = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
fsep (SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
comma ((SDoc -> SDoc) -> [SDoc] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map SDoc -> SDoc
quotes [SDoc]
xs))

quotedListWithOr :: [SDoc] -> SDoc
-- [x,y,z]  ==>  `x', `y' or `z'
quotedListWithOr :: [SDoc] -> SDoc
quotedListWithOr xs :: [SDoc]
xs@(SDoc
_:SDoc
_:[SDoc]
_) = [SDoc] -> SDoc
quotedList ([SDoc] -> [SDoc]
forall a. HasCallStack => [a] -> [a]
init [SDoc]
xs) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"or" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc -> SDoc
quotes ([SDoc] -> SDoc
forall a. HasCallStack => [a] -> a
last [SDoc]
xs)
quotedListWithOr [SDoc]
xs = [SDoc] -> SDoc
quotedList [SDoc]
xs

quotedListWithNor :: [SDoc] -> SDoc
-- [x,y,z]  ==>  `x', `y' nor `z'
quotedListWithNor :: [SDoc] -> SDoc
quotedListWithNor xs :: [SDoc]
xs@(SDoc
_:SDoc
_:[SDoc]
_) = [SDoc] -> SDoc
quotedList ([SDoc] -> [SDoc]
forall a. HasCallStack => [a] -> [a]
init [SDoc]
xs) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"nor" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc -> SDoc
quotes ([SDoc] -> SDoc
forall a. HasCallStack => [a] -> a
last [SDoc]
xs)
quotedListWithNor [SDoc]
xs = [SDoc] -> SDoc
quotedList [SDoc]
xs

quotedListWithAnd :: [SDoc] -> SDoc
-- [x,y,z]  ==>  `x', `y' and `z'
quotedListWithAnd :: [SDoc] -> SDoc
quotedListWithAnd xs :: [SDoc]
xs@(SDoc
_:SDoc
_:[SDoc]
_) = [SDoc] -> SDoc
quotedList ([SDoc] -> [SDoc]
forall a. HasCallStack => [a] -> [a]
init [SDoc]
xs) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"and" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc -> SDoc
quotes ([SDoc] -> SDoc
forall a. HasCallStack => [a] -> a
last [SDoc]
xs)
quotedListWithAnd [SDoc]
xs = [SDoc] -> SDoc
quotedList [SDoc]
xs


unquotedListWith :: SDoc -> [SDoc] -> SDoc
-- "whatever" [x,y,z] ==> x, y whatever z
unquotedListWith :: SDoc -> [SDoc] -> SDoc
unquotedListWith SDoc
d [SDoc]
xs
  | Just (fs :: [SDoc]
fs@(SDoc
_:[SDoc]
_), SDoc
l) <- [SDoc] -> Maybe ([SDoc], SDoc)
forall a. [a] -> Maybe ([a], a)
snocView [SDoc]
xs = [SDoc] -> SDoc
unquotedList [SDoc]
fs SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc
l
  | Bool
otherwise                         = [SDoc] -> SDoc
unquotedList [SDoc]
xs
  where
    unquotedList :: [SDoc] -> SDoc
unquotedList = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
fsep ([SDoc] -> SDoc) -> ([SDoc] -> [SDoc]) -> [SDoc] -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
comma

{-
************************************************************************
*                                                                      *
\subsection{Printing numbers verbally}
*                                                                      *
************************************************************************
-}

intWithCommas :: Integral a => a -> SDoc
-- Prints a big integer with commas, eg 345,821
intWithCommas :: forall a. Integral a => a -> SDoc
intWithCommas a
n
  | a
n a -> a -> Bool
forall a. Ord a => a -> a -> Bool
< a
0     = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'-' SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> a -> SDoc
forall a. Integral a => a -> SDoc
intWithCommas (-a
n)
  | a
q a -> a -> Bool
forall a. Eq a => a -> a -> Bool
== a
0    = Int -> SDoc
forall doc. IsLine doc => Int -> doc
int (a -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral a
r)
  | Bool
otherwise = a -> SDoc
forall a. Integral a => a -> SDoc
intWithCommas a
q SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
forall doc. IsLine doc => doc
comma SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
zeroes SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> Int -> SDoc
forall doc. IsLine doc => Int -> doc
int (a -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral a
r)
  where
    (a
q,a
r) = a
n a -> a -> (a, a)
forall a. Integral a => a -> a -> (a, a)
`quotRem` a
1000
    zeroes :: SDoc
zeroes | a
r a -> a -> Bool
forall a. Ord a => a -> a -> Bool
>= a
100  = SDoc
forall doc. IsOutput doc => doc
empty
           | a
r a -> a -> Bool
forall a. Ord a => a -> a -> Bool
>= a
10   = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
'0'
           | Bool
otherwise = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"00"

-- | Converts an integer to a verbal index:
--
-- > speakNth 1 = text "first"
-- > speakNth 5 = text "fifth"
-- > speakNth 21 = text "21st"
speakNth :: Int -> SDoc
speakNth :: Int -> SDoc
speakNth Int
1 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"first"
speakNth Int
2 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"second"
speakNth Int
3 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"third"
speakNth Int
4 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"fourth"
speakNth Int
5 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"fifth"
speakNth Int
6 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"sixth"
speakNth Int
n = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
hcat [ Int -> SDoc
forall doc. IsLine doc => Int -> doc
int Int
n, String -> SDoc
forall doc. IsLine doc => String -> doc
text String
suffix ]
  where
    suffix :: String
suffix | Int
n Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
<= Int
20       = String
"th"       -- 11,12,13 are non-std
           | Int
last_dig Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
1 = String
"st"
           | Int
last_dig Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
2 = String
"nd"
           | Int
last_dig Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
3 = String
"rd"
           | Bool
otherwise     = String
"th"

    last_dig :: Int
last_dig = Int
n Int -> Int -> Int
forall a. Integral a => a -> a -> a
`rem` Int
10

-- | Converts an integer to a verbal multiplicity:
--
-- > speakN 0 = text "none"
-- > speakN 5 = text "five"
-- > speakN 10 = text "10"
speakN :: Int -> SDoc
speakN :: Int -> SDoc
speakN Int
0 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"none"  -- E.g.  "they have none"
speakN Int
1 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"one"   -- E.g.  "they have one"
speakN Int
2 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"two"
speakN Int
3 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"three"
speakN Int
4 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"four"
speakN Int
5 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"five"
speakN Int
6 = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"six"
speakN Int
n = Int -> SDoc
forall doc. IsLine doc => Int -> doc
int Int
n

-- | Converts an integer and object description to a statement about the
-- multiplicity of those objects:
--
-- > speakNOf 0 (text "melon") = text "no melons"
-- > speakNOf 1 (text "melon") = text "one melon"
-- > speakNOf 3 (text "melon") = text "three melons"
speakNOf :: Int -> SDoc -> SDoc
speakNOf :: Int -> SDoc -> SDoc
speakNOf Int
0 SDoc
d = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"no" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
's'
speakNOf Int
1 SDoc
d = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"one" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc
d                 -- E.g. "one argument"
speakNOf Int
n SDoc
d = Int -> SDoc
speakN Int
n SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc
d SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
's'               -- E.g. "three arguments"

-- | Determines the pluralisation suffix appropriate for the length of a list:
--
-- > plural [] = char 's'
-- > plural ["Hello"] = empty
-- > plural ["Hello", "World"] = char 's'
plural :: [a] -> SDoc
plural :: forall a. [a] -> SDoc
plural [a
_] = SDoc
forall doc. IsOutput doc => doc
empty  -- a bit frightening, but there you are
plural [a]
_   = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
's'

-- | Determines the singular verb suffix appropriate for the length of a list:
--
-- > singular [] = empty
-- > singular["Hello"] = char 's'
-- > singular ["Hello", "World"] = empty
singular :: [a] -> SDoc
singular :: forall a. [a] -> SDoc
singular [a
_] = Char -> SDoc
forall doc. IsLine doc => Char -> doc
char Char
's'
singular [a]
_   = SDoc
forall doc. IsOutput doc => doc
empty

-- | Determines the form of to be appropriate for the length of a list:
--
-- > isOrAre [] = text "are"
-- > isOrAre ["Hello"] = text "is"
-- > isOrAre ["Hello", "World"] = text "are"
isOrAre :: [a] -> SDoc
isOrAre :: forall a. [a] -> SDoc
isOrAre [a
_] = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"is"
isOrAre [a]
_   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"are"

-- | Determines the form of to do appropriate for the length of a list:
--
-- > doOrDoes [] = text "do"
-- > doOrDoes ["Hello"] = text "does"
-- > doOrDoes ["Hello", "World"] = text "do"
doOrDoes :: [a] -> SDoc
doOrDoes :: forall a. [a] -> SDoc
doOrDoes [a
_] = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"does"
doOrDoes [a]
_   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"do"

-- | Determines the form of possessive appropriate for the length of a list:
--
-- > itsOrTheir [x]   = text "its"
-- > itsOrTheir [x,y] = text "their"
-- > itsOrTheir []    = text "their"  -- probably avoid this
itsOrTheir :: [a] -> SDoc
itsOrTheir :: forall a. [a] -> SDoc
itsOrTheir [a
_] = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"its"
itsOrTheir [a]
_   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"their"

-- | 'it' or 'they', depeneding on the length of the list.
--
-- > itOrThey [x]   = text "it"
-- > itOrThey [x,y] = text "they"
-- > itOrThey []    = text "they"  -- probably avoid this
itOrThey :: [a] -> SDoc
itOrThey :: forall a. [a] -> SDoc
itOrThey [a
_] = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"it"
itOrThey [a]
_   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"they"


-- | Determines the form of subject appropriate for the length of a list:
--
-- > thisOrThese [x]   = text "This"
-- > thisOrThese [x,y] = text "These"
-- > thisOrThese []    = text "These"  -- probably avoid this
thisOrThese :: [a] -> SDoc
thisOrThese :: forall a. [a] -> SDoc
thisOrThese [a
_] = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"This"
thisOrThese [a]
_   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"These"

-- | @"has"@ or @"have"@ depending on the length of a list.
hasOrHave :: [a] -> SDoc
hasOrHave :: forall a. [a] -> SDoc
hasOrHave [a
_] = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"has"
hasOrHave [a]
_   = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"have"

{- Note [SDoc versus HDoc]
~~~~~~~~~~~~~~~~~~~~~~~~~~
The SDoc type is used pervasively throughout the compiler to represent pretty-
printable output. Almost all text written by GHC, from the Haskell types and
expressions included in error messages to debug dumps, is assembled using SDoc.
SDoc is nice because it handles multiline layout in a semi-automatic fashion,
enabling printed expressions to wrap to fit a given line width while correctly
indenting the following lines to preserve alignment.

SDoc’s niceties necessarily have some performance cost, but this is normally
okay, as printing output is rarely a performance bottleneck. However, one
notable exception to this is code generation: GHC must sometimes write
megabytes’ worth of generated assembly when compiling a single module, in which
case the overhead of SDoc has a significant cost (see #21853 for some numbers).
Moreover, generated assembly does not have the complex layout requirements of
pretty-printed Haskell code, so using SDoc does not buy us much, anyway.

Nevertheless, we do still want to be able to share some logic between writing
assembly and pretty-printing. For example, the logic for printing basic block
labels (GHC.Cmm.CLabel.pprCLabel) is nontrivial, so we want to have a single
implementation that can be used both when generating code and when generating
Cmm dumps. This is where HDoc comes in: HDoc provides a subset of the SDoc
interface, but it is implemented in a far more efficient way, writing directly
to a `Handle` (via a `BufHandle`) without building any intermediate structures.
We can then use typeclasses to parameterize functions like `pprCLabel` over the
printing implementation.

One might imagine this would result in one IsDoc typeclass, and two instances,
one for SDoc and one for HDoc. However, in fact, we need two *variants* of HDoc,
as described in Note [HLine versus HDoc], and this gives rise to a small
typeclass hierarchy consisting of IsOutput, IsLine, and IsDoc;
see Note [The outputable class hierarchy] for details.

Note [HLine versus HDoc]
~~~~~~~~~~~~~~~~~~~~~~~~
As described in Note [SDoc versus HDoc], HDoc does not support any of the layout
niceties of SDoc for efficiency. However, this presents a small problem if we
want to be compatible with the SDoc API, as expressions like

    text "foo" <+> (text "bar" $$ text "baz")

are expected to produce

    foo bar
        baz

which requires tracking line widths to know how far to indent the second line.
We can’t throw out vertical composition altogether, as we need to be able to
construct multiline HDocs, but we *can* restrict vertical composition to
concatenating whole lines at a time, as this is all that is necessary to
generate assembly in the code generator.

To implement this restriction, we provide two distinct types: HLine and HDoc.
As their names suggests, an HLine represents a single line of output, while an
HDoc represents a multiline document. Atoms formed from `char` and `text` begin
their lives as HLines, which can be horizontally (but not vertically) composed:

    char :: Char -> HLine
    text :: String -> HLine
    (<+>) :: HLine -> HLine -> HLine

Once a line has been fully assembled, it can be “locked up” into a single-line
HDoc via `line`, and HDocs can be vertically (but not horizontally) composed:

    line :: HLine -> HDoc
    ($$) :: HLine -> HLine -> HLine

Note that, at runtime, HLine and HDoc use exactly the same representation. This
distinction only exists in the type system to rule out the cases we don’t want
to have to handle.

Note [The outputable class hierarchy]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
As described in Note [SDoc versus HDoc], we want to be able to parameterize over
the choice of printing implementation when implementing common bits of printing
logic. However, as described in Note [HLine versus HDoc], we also want to
distinguish code that does single-line printing from code that does multi-line
printing. Therefore, code that is parameterized over the choice of printer must
respect this single- versus multi-line distinction. This naturally leads to two
typeclasses:

    class IsLine doc where
      char :: Char -> doc
      text :: String -> doc
      (<>) :: doc -> doc -> doc
      ...

    class IsLine (Line doc) => IsDoc doc where
      type Line doc = r | r -> doc
      line :: Line doc -> doc
      ($$) :: doc -> doc -> doc
      ...

These classes support the following instances:

    instance IsLine SDoc
    instance IsLine SDoc where
      type Line SDoc = SDoc

    instance IsLine HLine
    instance IsDoc HDoc where
      type Line HDoc = HLine

However, we run into a new problem: we provide many useful combinators on docs
that don’t care at all about the single-/multi-line distinction. For example,
ppWhen and ppUnless provide conditional logic, and docWithContext provides
access to the ambient SDocContext. Given the above classes, we would need two
variants of each of these combinators:

    ppWhenL :: IsLine doc => Bool -> doc -> doc
    ppWhenL c d = if c then d else emptyL

    ppWhenD :: IsDoc  doc => Bool -> doc -> doc
    ppWhenD c d = if c then d else emptyD

This is a needlessly annoying distinction, so we introduce a common superclass,
IsOutput, that allows these combinators to be generic over both variants:

    class IsOutput doc where
      empty :: doc
      docWithContext :: (SDocContext -> doc) -> doc
      docWithStyle :: doc -> (PprStyle -> SDoc) -> doc

    class IsOutput doc => IsLine doc
    class (IsOutput doc, IsLine (Line doc)) => IsDoc doc

In practice, IsOutput isn’t used explicitly very often, but it makes code that
uses the combinators derived from it significantly less noisy.

Note [SPECIALIZE to HDoc]
~~~~~~~~~~~~~~~~~~~~~~~~~
The IsLine and IsDoc classes are useful to share printing logic between code
that uses SDoc and code that uses HDoc, but we must take some care when doing
so. Much HDoc’s efficiency comes from GHC’s ability to optimize code that uses
it to eliminate unnecessary indirection, but the HDoc primitives must be inlined
before these opportunities can be exposed. Therefore, we want to explicitly
request that GHC generate HDoc (or HLine) specializations of any polymorphic
printing functions used by the code generator.

In code generators (CmmToAsm.{AArch64,PPC,X86}.Ppr) we add a specialize
pragma just to the entry point pprNatCmmDecl, to avoid cluttering
the entire module. Because specialization is transitive, this makes sure
that other functions in that module are specialized too.

Note [dualLine and dualDoc]
~~~~~~~~~~~~~~~~~~~~~~~~~~~
The IsLine and IsDoc classes provide the dualLine and dualDoc methods,
respectively, which have the following types:

    dualLine :: IsLine doc => SDoc -> HLine -> doc
    dualDoc  :: IsDoc  doc => SDoc -> HDoc  -> doc

These are effectively a form of type-`case`, selecting between each of their two
arguments depending on the type they are instantiated at. They serve as a
“nuclear option” for code that is, for some reason or another, unreasonably
difficult to make completely equivalent under both printer implementations.

These operations should generally be avoided, as they can result in surprising
changes in behavior when the printer implementation is changed.
Right now, they are used only when outputting debugging comments in
codegen, as it is difficult to adapt that code to use HLine and not necessary.

Use these operations wisely.

Note [docWithStyle]
~~~~~~~~~~~~~~~~~~~
Sometimes when printing, we consult the printing style. This can be done
with 'docWithStyle c f'. This is similar to 'docWithContext (f . sdocStyle)',
but:
* For code style, 'docWithStyle c f' will return 'c'.
* For other styles, 'docWithStyle c f', will call 'f style', but expect
  an SDoc rather than doc. This removes the need to write code polymorphic
  in SDoc and HDoc, since the latter is used only for code style.
-}

-- | Represents a single line of output that can be efficiently printed directly
-- to a 'System.IO.Handle' (actually a 'BufHandle').
-- See Note [SDoc versus HDoc] and Note [HLine versus HDoc] for more details.
newtype HLine = HLine' { HLine -> SDocContext -> BufHandle -> IO ()
runHLine :: SDocContext -> BufHandle -> IO () }

-- | Represents a (possibly empty) sequence of lines that can be efficiently
-- printed directly to a 'System.IO.Handle' (actually a 'BufHandle').
-- See Note [SDoc versus HDoc] and Note [HLine versus HDoc] for more details.
newtype HDoc = HDoc' { HDoc -> SDocContext -> BufHandle -> IO ()
runHDoc :: SDocContext -> BufHandle -> IO () }

-- See Note [The one-shot state monad trick] in GHC.Utils.Monad
pattern HLine :: (SDocContext -> BufHandle -> IO ()) -> HLine
pattern $mHLine :: forall {r}.
HLine
-> ((SDocContext -> BufHandle -> IO ()) -> r) -> ((# #) -> r) -> r
$bHLine :: (SDocContext -> BufHandle -> IO ()) -> HLine
HLine f <- HLine' f
  where HLine SDocContext -> BufHandle -> IO ()
f = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine' ((SDocContext -> BufHandle -> IO ())
-> SDocContext -> BufHandle -> IO ()
forall a b. (a -> b) -> a -> b
oneShot (\SDocContext
ctx -> (BufHandle -> IO ()) -> BufHandle -> IO ()
forall a b. (a -> b) -> a -> b
oneShot (\BufHandle
h -> SDocContext -> BufHandle -> IO ()
f SDocContext
ctx BufHandle
h)))
{-# COMPLETE HLine #-}

-- See Note [The one-shot state monad trick] in GHC.Utils.Monad
pattern HDoc :: (SDocContext -> BufHandle -> IO ()) -> HDoc
pattern $mHDoc :: forall {r}.
HDoc
-> ((SDocContext -> BufHandle -> IO ()) -> r) -> ((# #) -> r) -> r
$bHDoc :: (SDocContext -> BufHandle -> IO ()) -> HDoc
HDoc f <- HDoc' f
  where HDoc SDocContext -> BufHandle -> IO ()
f = (SDocContext -> BufHandle -> IO ()) -> HDoc
HDoc' ((SDocContext -> BufHandle -> IO ())
-> SDocContext -> BufHandle -> IO ()
forall a b. (a -> b) -> a -> b
oneShot (\SDocContext
ctx -> (BufHandle -> IO ()) -> BufHandle -> IO ()
forall a b. (a -> b) -> a -> b
oneShot (\BufHandle
h -> SDocContext -> BufHandle -> IO ()
f SDocContext
ctx BufHandle
h)))
{-# COMPLETE HDoc #-}

bPutHDoc :: BufHandle -> SDocContext -> HDoc -> IO ()
bPutHDoc :: BufHandle -> SDocContext -> HDoc -> IO ()
bPutHDoc BufHandle
h SDocContext
ctx (HDoc SDocContext -> BufHandle -> IO ()
f) = Bool -> IO () -> IO ()
forall a. HasCallStack => Bool -> a -> a
assert (PprStyle -> Bool
codeStyle (SDocContext -> PprStyle
sdocStyle SDocContext
ctx)) (SDocContext -> BufHandle -> IO ()
f SDocContext
ctx BufHandle
h)

-- | A superclass for 'IsLine' and 'IsDoc' that provides an identity, 'empty',
-- as well as access to the shared 'SDocContext'.
--
-- See Note [The outputable class hierarchy] for more details.
class IsOutput doc where
  empty :: doc
  docWithContext :: (SDocContext -> doc) -> doc
  docWithStyle :: doc -> (PprStyle -> SDoc) -> doc  -- see Note [docWithStyle]

-- | A class of types that represent a single logical line of text, with support
-- for horizontal composition.
--
-- See Note [HLine versus HDoc] and Note [The outputable class hierarchy] for
-- more details.
class IsOutput doc => IsLine doc where
  char :: Char -> doc
  text :: String -> doc
  ftext :: FastString -> doc
  ztext :: FastZString -> doc

  -- | Join two @doc@s together horizontally without a gap.
  (<>) :: doc -> doc -> doc
  -- | Join two @doc@s together horizontally with a gap between them.
  (<+>) :: doc -> doc -> doc
  -- | Separate: is either like 'hsep' or like 'vcat', depending on what fits.
  sep :: [doc] -> doc
  -- | A paragraph-fill combinator. It's much like 'sep', only it keeps fitting
  -- things on one line until it can't fit any more.
  fsep :: [doc] -> doc

  -- | Concatenate @doc@s horizontally without gaps.
  hcat :: [doc] -> doc
  hcat [doc]
docs = (doc -> doc -> doc) -> doc -> [doc] -> doc
forall a b. (a -> b -> b) -> b -> [a] -> b
forall (t :: * -> *) a b.
Foldable t =>
(a -> b -> b) -> b -> t a -> b
foldr doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
(<>) doc
forall doc. IsOutput doc => doc
empty [doc]
docs
  {-# INLINE CONLIKE hcat #-}

  -- | Concatenate @doc@s horizontally with a space between each one.
  hsep :: [doc] -> doc
  hsep [doc]
docs = (doc -> doc -> doc) -> doc -> [doc] -> doc
forall a b. (a -> b -> b) -> b -> [a] -> b
forall (t :: * -> *) a b.
Foldable t =>
(a -> b -> b) -> b -> t a -> b
foldr doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
(<+>) doc
forall doc. IsOutput doc => doc
empty [doc]
docs
  {-# INLINE CONLIKE hsep #-}

  -- | Prints as either the given 'SDoc' or the given 'HLine', depending on
  -- which type the result is instantiated to. This should generally be avoided;
  -- see Note [dualLine and dualDoc] for details.
  dualLine :: SDoc -> HLine -> doc


-- | A class of types that represent a multiline document, with support for
-- vertical composition.
--
-- See Note [HLine versus HDoc] and Note [The outputable class hierarchy] for
-- more details.
class (IsOutput doc, IsLine (Line doc)) => IsDoc doc where
  type Line doc = r | r -> doc
  line :: Line doc -> doc

  -- | Join two @doc@s together vertically. If there is no vertical overlap it
  -- "dovetails" the two onto one line.
  ($$) :: doc -> doc -> doc

  lines_ :: [Line doc] -> doc
  lines_ = [doc] -> doc
forall doc. IsDoc doc => [doc] -> doc
vcat ([doc] -> doc) -> ([Line doc] -> [doc]) -> [Line doc] -> doc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Line doc -> doc) -> [Line doc] -> [doc]
forall a b. (a -> b) -> [a] -> [b]
map Line doc -> doc
forall doc. IsDoc doc => Line doc -> doc
line
  {-# INLINE CONLIKE lines_ #-}

  -- | Concatenate @doc@s vertically with dovetailing.
  vcat :: [doc] -> doc
  vcat [doc]
ls = (doc -> doc -> doc) -> doc -> [doc] -> doc
forall a b. (a -> b -> b) -> b -> [a] -> b
forall (t :: * -> *) a b.
Foldable t =>
(a -> b -> b) -> b -> t a -> b
foldr doc -> doc -> doc
forall doc. IsDoc doc => doc -> doc -> doc
($$) doc
forall doc. IsOutput doc => doc
empty [doc]
ls
  {-# INLINE CONLIKE vcat #-}

  -- | Prints as either the given 'SDoc' or the given 'HDoc', depending on
  -- which type the result is instantiated to. This should generally be avoided;
  -- see Note [dualLine and dualDoc] for details.
  dualDoc :: SDoc -> HDoc -> doc

instance IsOutput SDoc where
  empty :: SDoc
empty       = Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ Doc
Pretty.empty
  {-# INLINE CONLIKE empty #-}
  docWithContext :: (SDocContext -> SDoc) -> SDoc
docWithContext = (SDocContext -> SDoc) -> SDoc
sdocWithContext
  {-# INLINE docWithContext #-}
  docWithStyle :: SDoc -> (PprStyle -> SDoc) -> SDoc
docWithStyle SDoc
c PprStyle -> SDoc
f = (SDocContext -> SDoc) -> SDoc
sdocWithContext (\SDocContext
ctx -> let sty :: PprStyle
sty = SDocContext -> PprStyle
sdocStyle SDocContext
ctx
                                              in if PprStyle -> Bool
codeStyle PprStyle
sty then SDoc
c
                                                                  else PprStyle -> SDoc
f PprStyle
sty)
                     -- see Note [docWithStyle]
  {-# INLINE CONLIKE docWithStyle #-}

instance IsLine SDoc where
  char :: Char -> SDoc
char Char
c = Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ Char -> Doc
Pretty.char Char
c
  {-# INLINE CONLIKE char #-}
  text :: String -> SDoc
text String
s = Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ String -> Doc
Pretty.text String
s
  {-# INLINE CONLIKE text #-}   -- Inline so that the RULE Pretty.text will fire
  ftext :: FastString -> SDoc
ftext FastString
s = Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ FastString -> Doc
Pretty.ftext FastString
s
  {-# INLINE CONLIKE ftext #-}
  ztext :: FastZString -> SDoc
ztext FastZString
s = Doc -> SDoc
docToSDoc (Doc -> SDoc) -> Doc -> SDoc
forall a b. (a -> b) -> a -> b
$ FastZString -> Doc
Pretty.ztext FastZString
s
  {-# INLINE CONLIKE ztext #-}
  <> :: SDoc -> SDoc -> SDoc
(<>) SDoc
d1 SDoc
d2 = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> Doc -> Doc -> Doc
(Pretty.<>)  (SDoc -> SDocContext -> Doc
runSDoc SDoc
d1 SDocContext
ctx) (SDoc -> SDocContext -> Doc
runSDoc SDoc
d2 SDocContext
ctx)
  {-# INLINE CONLIKE (<>) #-}
  <+> :: SDoc -> SDoc -> SDoc
(<+>) SDoc
d1 SDoc
d2 = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> Doc -> Doc -> Doc
(Pretty.<+>) (SDoc -> SDocContext -> Doc
runSDoc SDoc
d1 SDocContext
ctx) (SDoc -> SDocContext -> Doc
runSDoc SDoc
d2 SDocContext
ctx)
  {-# INLINE CONLIKE (<+>) #-}
  hcat :: [SDoc] -> SDoc
hcat [SDoc]
ds = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.hcat [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]
  {-# INLINE CONLIKE hcat #-}
  hsep :: [SDoc] -> SDoc
hsep [SDoc]
ds = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.hsep [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]
  {-# INLINE CONLIKE hsep #-}
  sep :: [SDoc] -> SDoc
sep [SDoc]
ds  = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.sep  [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]
  {-# INLINE CONLIKE sep #-}
  fsep :: [SDoc] -> SDoc
fsep [SDoc]
ds = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.fsep [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]
  {-# INLINE CONLIKE fsep #-}
  dualLine :: SDoc -> HLine -> SDoc
dualLine SDoc
s HLine
_ = SDoc
s
  {-# INLINE CONLIKE dualLine #-}

instance IsDoc SDoc where
  type Line SDoc = SDoc
  line :: Line SDoc -> SDoc
line = Line SDoc -> SDoc
SDoc -> SDoc
forall a. a -> a
id
  {-# INLINE line #-}
  lines_ :: [Line SDoc] -> SDoc
lines_ = [Line SDoc] -> SDoc
[SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat
  {-# INLINE lines_ #-}

  $$ :: SDoc -> SDoc -> SDoc
($$) SDoc
d1 SDoc
d2  = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> Doc -> Doc -> Doc
(Pretty.$$)  (SDoc -> SDocContext -> Doc
runSDoc SDoc
d1 SDocContext
ctx) (SDoc -> SDocContext -> Doc
runSDoc SDoc
d2 SDocContext
ctx)
  {-# INLINE CONLIKE ($$) #-}
  vcat :: [SDoc] -> SDoc
vcat [SDoc]
ds = (SDocContext -> Doc) -> SDoc
SDoc ((SDocContext -> Doc) -> SDoc) -> (SDocContext -> Doc) -> SDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx -> [Doc] -> Doc
Pretty.vcat [SDoc -> SDocContext -> Doc
runSDoc SDoc
d SDocContext
ctx | SDoc
d <- [SDoc]
ds]
  {-# INLINE CONLIKE vcat #-}
  dualDoc :: SDoc -> HDoc -> SDoc
dualDoc SDoc
s HDoc
_ = SDoc
s
  {-# INLINE CONLIKE dualDoc #-}

instance IsOutput HLine where
  empty :: HLine
empty = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine (\SDocContext
_ BufHandle
_ -> () -> IO ()
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ())
  {-# INLINE empty #-}
  docWithContext :: (SDocContext -> HLine) -> HLine
docWithContext SDocContext -> HLine
f = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine ((SDocContext -> BufHandle -> IO ()) -> HLine)
-> (SDocContext -> BufHandle -> IO ()) -> HLine
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx BufHandle
h -> HLine -> SDocContext -> BufHandle -> IO ()
runHLine (SDocContext -> HLine
f SDocContext
ctx) SDocContext
ctx BufHandle
h
  {-# INLINE CONLIKE docWithContext #-}
  docWithStyle :: HLine -> (PprStyle -> SDoc) -> HLine
docWithStyle HLine
c PprStyle -> SDoc
_ = HLine
c  -- see Note [docWithStyle]
  {-# INLINE CONLIKE docWithStyle #-}

instance IsOutput HDoc where
  empty :: HDoc
empty = (SDocContext -> BufHandle -> IO ()) -> HDoc
HDoc (\SDocContext
_ BufHandle
_ -> () -> IO ()
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ())
  {-# INLINE empty #-}
  docWithContext :: (SDocContext -> HDoc) -> HDoc
docWithContext SDocContext -> HDoc
f = (SDocContext -> BufHandle -> IO ()) -> HDoc
HDoc ((SDocContext -> BufHandle -> IO ()) -> HDoc)
-> (SDocContext -> BufHandle -> IO ()) -> HDoc
forall a b. (a -> b) -> a -> b
$ \SDocContext
ctx BufHandle
h -> HDoc -> SDocContext -> BufHandle -> IO ()
runHDoc (SDocContext -> HDoc
f SDocContext
ctx) SDocContext
ctx BufHandle
h
  {-# INLINE CONLIKE docWithContext #-}
  docWithStyle :: HDoc -> (PprStyle -> SDoc) -> HDoc
docWithStyle HDoc
c PprStyle -> SDoc
_ = HDoc
c  -- see Note [docWithStyle]
  {-# INLINE CONLIKE docWithStyle #-}

instance IsLine HLine where
  char :: Char -> HLine
char Char
c = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine (\SDocContext
_ BufHandle
h -> BufHandle -> Char -> IO ()
bPutChar BufHandle
h Char
c)
  {-# INLINE CONLIKE char #-}
  text :: String -> HLine
text String
str = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine (\SDocContext
_ BufHandle
h -> BufHandle -> String -> IO ()
bPutStr BufHandle
h String
str)
  {-# INLINE CONLIKE text #-}
  ftext :: FastString -> HLine
ftext FastString
fstr = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine (\SDocContext
_ BufHandle
h -> BufHandle -> FastString -> IO ()
bPutFS BufHandle
h FastString
fstr)
  {-# INLINE CONLIKE ftext #-}
  ztext :: FastZString -> HLine
ztext FastZString
fstr = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine (\SDocContext
_ BufHandle
h -> BufHandle -> FastZString -> IO ()
bPutFZS BufHandle
h FastZString
fstr)
  {-# INLINE CONLIKE ztext #-}

  HLine SDocContext -> BufHandle -> IO ()
f <> :: HLine -> HLine -> HLine
<> HLine SDocContext -> BufHandle -> IO ()
g = (SDocContext -> BufHandle -> IO ()) -> HLine
HLine (\SDocContext
ctx BufHandle
h -> SDocContext -> BufHandle -> IO ()
f SDocContext
ctx BufHandle
h IO () -> IO () -> IO ()
forall a b. IO a -> IO b -> IO b
forall (f :: * -> *) a b. Applicative f => f a -> f b -> f b
*> SDocContext -> BufHandle -> IO ()
g SDocContext
ctx BufHandle
h)
  {-# INLINE CONLIKE (<>) #-}
  HLine
f <+> :: HLine -> HLine -> HLine
<+> HLine
g = HLine
f HLine -> HLine -> HLine
forall doc. IsLine doc => doc -> doc -> doc
<> Char -> HLine
forall doc. IsLine doc => Char -> doc
char Char
' ' HLine -> HLine -> HLine
forall doc. IsLine doc => doc -> doc -> doc
<> HLine
g
  {-# INLINE CONLIKE (<+>) #-}
  sep :: [HLine] -> HLine
sep = [HLine] -> HLine
forall doc. IsLine doc => [doc] -> doc
hsep
  {-# INLINE sep #-}
  fsep :: [HLine] -> HLine
fsep = [HLine] -> HLine
forall doc. IsLine doc => [doc] -> doc
hsep
  {-# INLINE fsep #-}

  dualLine :: SDoc -> HLine -> HLine
dualLine SDoc
_ HLine
h = HLine
h
  {-# INLINE CONLIKE dualLine #-}

instance IsDoc HDoc where
  type Line HDoc = HLine
  line :: Line HDoc -> HDoc
line (HLine SDocContext -> BufHandle -> IO ()
f) = (SDocContext -> BufHandle -> IO ()) -> HDoc
HDoc (\SDocContext
ctx BufHandle
h -> SDocContext -> BufHandle -> IO ()
f SDocContext
ctx BufHandle
h IO () -> IO () -> IO ()
forall a b. IO a -> IO b -> IO b
forall (f :: * -> *) a b. Applicative f => f a -> f b -> f b
*> BufHandle -> Char -> IO ()
bPutChar BufHandle
h Char
'\n')
  {-# INLINE CONLIKE line #-}
  HDoc SDocContext -> BufHandle -> IO ()
f $$ :: HDoc -> HDoc -> HDoc
$$ HDoc SDocContext -> BufHandle -> IO ()
g = (SDocContext -> BufHandle -> IO ()) -> HDoc
HDoc (\SDocContext
ctx BufHandle
h -> SDocContext -> BufHandle -> IO ()
f SDocContext
ctx BufHandle
h IO () -> IO () -> IO ()
forall a b. IO a -> IO b -> IO b
forall (f :: * -> *) a b. Applicative f => f a -> f b -> f b
*> SDocContext -> BufHandle -> IO ()
g SDocContext
ctx BufHandle
h)
  {-# INLINE CONLIKE ($$) #-}
  dualDoc :: SDoc -> HDoc -> HDoc
dualDoc SDoc
_ HDoc
h = HDoc
h
  {-# INLINE CONLIKE dualDoc #-}