package scala.dbc2.syntax

import TokenVal._

import statement.AnyValueDef._

import scala.util.parsing.syntax.Tokens
import scala.util.parsing.input.{Reader, Position}

import java.lang.String

object DBC2Tokens extends Tokens {
	case class DBC2Token(t: TokenValue, value: Option[AnyValue]) extends Token {
		def chars: String = value match {
			case None => t.toString
			case Some(v) => v.toString
		}
		
		override def toString = value match {
			case None => t.toString
			case Some(v) => t.toString + "(" + v + ")"
		}
	}
	
	class MyScanner(tokens: List[Token], totalTokens: Int) extends Reader[Token] {
		def first = tokens match {
			case Nil => ErrorToken("no more tokens")
			case x::xs => x
		}
		def rest = new MyScanner(tokens.tail, totalTokens)
		def pos = new Position {
			def line = 0
			def column = totalTokens - tokens.size
			def lineContents: String = ""
		}
		def atEnd = tokens.isEmpty
	}
	
	implicit def token(t: TokenValue): DBC2Token = DBC2Token(t, None)
	implicit def token(value: AnyValue): DBC2Token = DBC2Token(anyValueToTokenValue(value), Some(value))
	implicit def token(sym: Symbol): DBC2Token = DBC2Token(SYMBOL, Some(AnyValue(Some(sym.name), None)))
}