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56 lines
1.3 KiB
56 lines
1.3 KiB
{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE DeriveAnyClass #-}
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module Frontend.Syntax.Var where
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import qualified Data.Text as T
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import Data.Text (Text)
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import Development.Shake.Classes
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import Frontend.Parser.Posn
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import GHC.Generics (Generic)
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data ParsedVar
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= UnqualVar
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{ varId :: Text
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, varBegin :: Posn
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, varEnd :: Posn
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}
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| QualVar
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{ varId :: Text
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, varPrefix :: Text
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, varBegin :: Posn
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, varEnd :: Posn
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}
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| ModId
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{ varId :: Text
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, varBegin :: Posn
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, varEnd :: Posn
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}
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| BuiltinId
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{ varId :: Text
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, varBuiltin :: BuiltinIdClass
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, varBegin :: Posn
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, varEnd :: Posn
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}
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deriving (Eq, Show, Generic, Binary, Hashable, NFData)
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data BuiltinIdClass
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= BuiltinTuple !Int
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| BuiltinNil
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| BuiltinArrow
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deriving (Eq, Show, Generic, Binary, Hashable, NFData)
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toModId :: ParsedVar -> ParsedVar
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toModId x@ModId{} = x
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toModId (UnqualVar x y z) = ModId x y z
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toModId (QualVar id pref b e) = ModId (pref <> T.singleton '.' <> id) b e
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toModId BuiltinId{} =
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error "Built-in variable can not be a module identifier!"
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splitModuleIdentifier :: Text -> [Text]
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splitModuleIdentifier t
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| T.null fst = []
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| otherwise = fst:splitModuleIdentifier (T.drop 1 snd)
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where (fst, snd) = T.span (/= '.') t
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