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module Database.Sql.Presto.Parser.Internal where

import qualified Text.Parsec as P

import Database.Sql.Presto.Token
import Database.Sql.Position
import Control.Monad.Reader
import Data.Text.Lazy (Text)
import Data.Set (Set)

type ScopeTableRef = Text

data ParserScope = ParserScope
    { selectTableAliases :: Maybe (Set ScopeTableRef) }
    deriving (Eq, Ord, Show)

type Parser = P.ParsecT [(Token, Position, Position)] Integer (Reader ParserScope)

getNextCounter :: Parser Integer
getNextCounter = P.modifyState (+1) >> P.getState