Error Handling

In Class++, there are some errors to be cautious of. Some limitations exist, and when you encounter an error, Class++ will try to tell you what that happened. But sometimes that might not be enough, so this page serves as a tutorial on how to troubleshoot some very important errors that you might encounter.

"Given ClassData value is not a table." & "Given ClassData value contains a metatable."

When you're creating a class, always make sure that the top classData table that you're giving to the class() function is a raw table. It must not contain a metatable, as classes are designed to be secure, adding a metatable to the classData will cause very important security problems. Attempting to give a value that's not a table or giving a table that contains a metatable will cause this error.

"Cannot redeclare property ..."

This error was mentioned in one of the previous pages, but I think it needs some mention here. In Class++, access specifiers are not tables that you can declare the same member in. For example, let's say you created a member called Name in the Public access specifier, you cannot create Name again in the Private or Protected access specifiers. They're access specifiers after all, not different tables that you can use like this. Attempting to declare a member that's already been declared in an access specifier before will cause this error.

"A function to handle the given number of arguments ... have not been provided for the overloaded function: ..."

This error occurs when you call an overloaded function with amount of arguments that do not correspond to a function in the given functionTable. For example, if you have an overloaded function, but do not have a specific function to handle 4 arguments, this error will occur.

"Cannot call function directly."

When you try to call a function inside a class directly, this error will occur. Classes are meant to be blueprints for an object, they cannot be used directly. Attempting to call a function inside a class and not through the object will cause this error.