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Add some structure to JSON.Syntax
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@ -52,6 +52,7 @@ library
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, Language.Go
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, Language.Go.Syntax
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, Language.JSON.Grammar
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, Language.JSON.Syntax
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, Language.Ruby
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, Language.Ruby.Grammar
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, Language.Ruby.Syntax
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46
src/Language/JSON/Syntax.hs
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46
src/Language/JSON/Syntax.hs
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@ -0,0 +1,46 @@
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{-# LANGUAGE DataKinds, GADTs, RankNTypes, TypeOperators #-}
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module Language.JSON.Syntax
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( assignment
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, Syntax
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, Grammar
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, Term)
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where
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import qualified Data.Syntax as Syntax
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import qualified Data.Syntax.Literal as Literal
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import Data.Syntax.Assignment hiding (Assignment, Error)
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import qualified Data.Syntax.Assignment as Assignment
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import Language.JSON.Grammar as Grammar
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import qualified Term
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import Data.Record
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import Data.Union
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import GHC.Stack
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import Prologue hiding (Location)
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type Syntax =
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'[ Literal.Hash
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, Syntax.Error
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]
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type Term = Term.Term (Union Syntax) (Record Location)
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type Assignment = HasCallStack => Assignment.Assignment (AST Grammar) Grammar Term
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makeTerm :: (HasCallStack, f :< fs) => a -> f (Term.Term (Union fs) a) -> Term.Term (Union fs) a
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makeTerm a f = cofree (a :< inj f)
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parseError :: Assignment
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parseError = makeTerm <$> symbol ParseError <*> (Syntax.Error [] <$ source)
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assignment :: Assignment
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assignment = object <|> array <|> parseError
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object :: Assignment
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object = makeTerm <$> symbol Object <*> children (Literal.Hash <$> many pairs)
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where pairs = makeTerm <$> symbol Pair <*> children (Literal.KeyValue <$> expression <*> expression)
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array :: Assignment
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array = makeTerm <$> symbol Array <*> children (Literal.Array <$> many expression)
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