59 lines
1.4 KiB
Haskell
59 lines
1.4 KiB
Haskell
module Language.Elna.Location
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( Identifier(..)
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, Location(..)
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, Node(..)
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, showArrayType
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) where
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import Data.Hashable (Hashable(..))
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import Data.String (IsString(..))
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import Data.Text (Text)
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import qualified Data.Text as Text
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import Data.Word (Word32)
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data Location = Location
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{ line :: Word32
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, column :: Word32
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} deriving (Eq, Show)
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instance Semigroup Location
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where
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(Location thisLine thisColumn) <> (Location thatLine thatColumn) = Location
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{ line = thisLine + thatLine
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, column = thisColumn + thatColumn
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}
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instance Monoid Location
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where
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mempty = Location{ line = 1, column = 1 }
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data Node a = Node a Location
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deriving (Eq, Show)
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instance Functor Node
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where
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fmap f (Node node location) = Node (f node) location
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newtype Identifier = Identifier { unIdentifier :: Text }
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deriving Eq
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instance Show Identifier
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where
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show (Identifier identifier) = Text.unpack identifier
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instance IsString Identifier
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where
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fromString = Identifier . Text.pack
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instance Ord Identifier
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where
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compare (Identifier lhs) (Identifier rhs) = compare lhs rhs
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instance Hashable Identifier
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where
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hashWithSalt salt (Identifier identifier) = hashWithSalt salt identifier
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showArrayType :: Show a => Word32 -> a -> String
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showArrayType elementCount typeName = concat
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["array[", show elementCount, "] of ", show typeName]
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