private TokenType.Element charToTokenType( char ch ){
		
		TokenType.Element type;
		
		switch( ch ){
		
			case '=':
				type = TokenType.Element.EQUALS;
				break;
				
			case '<':
				type = TokenType.Element.LESS_THAN;
				break;
				
			case '+':
				type = TokenType.Element.PLUS;
				break;
				
			case '-':
				type = TokenType.Element.MINUS;
				break;
				
			case '*':
				type = TokenType.Element.MULTIPLICATION;
				break;
				
			case '/':
				type = TokenType.Element.DIVISION;
				break;
				
			case '(':
				type = TokenType.Element.LEFT_BRACKET;
				break;
				
			case ')':
				type = TokenType.Element.RIGHT_BRACKET;
				break;
				
			case ';':
				type = TokenType.Element.INSTRUCTION_END;
				break;
				
			default:
				type = TokenType.Element.NONE;
		}
		
		return type;
	}