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{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeSynonymInstances #-}
{-# LANGUAGE ViewPatterns #-}
module Types
where
import GHC hiding (EpaComment)
import GHC.Utils.Outputable hiding ( (<>) )
import Data.Data (Data)
-- ---------------------------------------------------------------------
type Pos = (Int,Int)
-- ---------------------------------------------------------------------
data Rigidity = NormalLayout | RigidLayout deriving (Eq, Ord, Show)
-- ---------------------------------------------------------------------
-- | A Haskell comment. The @AnnKeywordId@ is present if it has been converted
-- from an @AnnKeywordId@ because the annotation must be interleaved into the
-- stream and does not have a well-defined position
data Comment = Comment
{
commentContents :: !String -- ^ The contents of the comment including separators
, commentAnchor :: !Anchor
, commentPriorTok :: !RealSrcSpan
, commentOrigin :: !(Maybe AnnKeywordId) -- ^ We sometimes turn syntax into comments in order to process them properly.
}
deriving (Data, Eq)
instance Show Comment where
show (Comment cs ss r o)
= "(Comment " ++ show cs ++ " " ++ showPprUnsafe ss ++ " " ++ show r ++ " " ++ show o ++ ")"
instance Ord Comment where
-- When we have CPP injected comments with a fake filename, or LINE
-- pragma, the file name changes, so we need to compare the
-- locations only, with out the filename.
compare (Comment _ ss1 _ _) (Comment _ ss2 _ _) = compare (ss2pos $ anchor ss1) (ss2pos $ anchor ss2)
where
ss2pos ss = (srcSpanStartLine ss,srcSpanStartCol ss)
instance Outputable Comment where
ppr x = text (show x)
-- | Marks the start column of a layout block.
newtype LayoutStartCol = LayoutStartCol { getLayoutStartCol :: Int }
deriving (Eq, Num)
instance Show LayoutStartCol where
show (LayoutStartCol sc) = "(LayoutStartCol " ++ show sc ++ ")"
-- ---------------------------------------------------------------------
-- Duplicated here so it can be used in show instances
showGhc :: (Outputable a) => a -> String
showGhc = showPprUnsafe
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