public T visit(AssignStmt stmt) throws Exception {
		String leftSide = stmt.getLocation().getType().toString();
		String rightSide = stmt.getExpression().getType().toString();
		String operator = stmt.getOperator().toString();

		if (operator == "=") {
			if (!leftSide.equals(rightSide)){
				throw new Exception("Type Error, you can not assign a " + rightSide + " to a " + leftSide);
			}
		}

		if (operator == "+=" || operator == "-="){
			if (!((rightSide.equals("int") || rightSide.equals("float")) && leftSide.equals(rightSide))){
				throw new Exception("ERROR in " + operator + " operator");
			}
		}

		return null;
	}