67 lines
1.7 KiB
Haskell
67 lines
1.7 KiB
Haskell
module Data.Language.TypeScript
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( Statement(..)
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, Type(..)
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, Name(..)
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, TypeDeclaration(..)
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, Primitive(..)
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, Object(..)
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, Union(..)
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) where
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{-# OPTIONS_GHC -Wall #-}
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import Data.Text (Text)
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import Data.Text.Prettyprint.Doc
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import Data.Map (Map)
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import qualified Data.Map as Map
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import Data.List
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deriving stock instance Show Name
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newtype Name = Name Text
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deriving stock instance Show Statement
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data Statement = StatementTypeDeclaration TypeDeclaration
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instance Pretty Name where
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pretty (Name nm) = pretty nm
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data TypeDeclaration = TypeDeclaration Name Type
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deriving stock instance Show TypeDeclaration
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instance Pretty TypeDeclaration where
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pretty = error "TODO"
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data Primitive = TsText | TsInteger
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deriving stock instance Show Primitive
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instance Pretty Primitive where
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pretty = \case
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TsText -> "string"
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TsInteger -> "number"
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newtype Object = Object (Map Text Type)
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deriving stock instance Show Object
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instance Pretty Object where
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pretty (Object m) = vsep $ ["{", nest 2 (vsep docs), "}"]
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where
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docs = decl <$> Map.toList m
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decl :: (Text, Type) -> Doc ann
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decl (txt, tp) = pretty txt <> ":" <+> pretty tp <> ";"
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newtype Union = Union ([] Type)
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deriving stock instance Show Union
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instance Pretty Union where
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pretty (Union tps) = sepBy "|" $ pretty <$> tps
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sepBy :: Doc a -> [Doc a] -> Doc a
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sepBy x = sep . intersperse x
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data Type = Primitive Primitive | TypeObject Object | TypeUnion Union | Array Type | TypeNamed Name
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deriving stock instance Show Type
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instance Pretty Type where
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pretty = \case
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Primitive p -> pretty p
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TypeObject o -> pretty o
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TypeUnion u -> pretty u
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Array a -> pretty a
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TypeNamed n -> pretty n
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