namespace NTERA.Engine.Compiler
{
	public enum Token
	{
		Unknown = 0,

		Identifer,
		Value,

		[LexerCharacter('#')]
		Sharp,

		[LexerCharacter('@')]
		AtSymbol,

		[LexerKeyword("DIM")]
		Dim,

		[LexerKeyword("DIMS")]
		Dims,

		[LexerKeyword("CONST")]
		Const,

		[LexerKeyword("REF")]
		Ref,

		[LexerKeyword("DYNAMIC")]
		Dynamic,

		[LexerKeyword("FUNCTION")]
		[LexerKeyword("FUNCTIONS")]
		ReturnFunction,

		[LexerKeyword("TO")]
		To,

		[LexerCharacter('\n')]
		NewLine,

		[LexerCharacter('"')]
		QuotationMark,

		[LexerCharacter(':')]
		Colon,

		[LexerCharacter(',')]
		Comma,

		//[LexerCharacter('{')]
		OpenBracket,

		//[LexerCharacter('}')]
		CloseBracket,

		[LexerCharacter('%')]
		Modulo,

		Plus,
		Increment,
		Minus,
		Decrement,

		[LexerCharacter('/')]
		Slash,

		[LexerCharacter('*')]
		Asterisk,

		[LexerCharacter('^')]
		Caret,
		Equal,
		Less,
		More,
		NotEqual,
		LessEqual,
		MoreEqual,
		Or,
		And,

		[LexerCharacter('!')]
		Not,

		[LexerCharacter('(')]
		LParen,

		[LexerCharacter(')')]
		RParen,

		[LexerCharacter('?')]
		QuestionMark,

		TernaryEscape,

		EOF = -1 //End Of File
	}

	public static class TokenEnumExtensions
	{
		public static bool IsUnary(this Token token)
		{
			return token == Token.Plus
				   || token == Token.Minus
				   || token == Token.Not;
		}

		public static bool IsArithmetic(this Token token)
		{
			return token == Token.Plus
				   || token == Token.Minus
				   || token == Token.Slash
				   || token == Token.Asterisk
				   || token == Token.Modulo
				   || token == Token.Caret
				   || token == Token.Equal
				   || token == Token.NotEqual
				   || token == Token.Less
				   || token == Token.LessEqual
				   || token == Token.More
				   || token == Token.MoreEqual
				   || token == Token.Or
				   || token == Token.And
				   || token == Token.Not;
		}
	}
}