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Length

Now that we have all sorts of Snek Objects (integers, floats, strings, arrays, etc.), we need a convenient way to get the length of any Snek Object. In Python (Sneklang's dreaded competitor) it's as easy as:

print(len(x))

As a Python dev, you don't have to know the value of x ahead of time because Python keeps track of it under-the-hood for you. We want the same capability in Sneklang.

Assignment

In snekobject.c, complete the snek_length function:

If the input is NULL return -1 (which we've chosen to indicate failure).
If the input is an integer, its size is always 1.
If the input is a float, its size is always 1.
If the input is a string, its size is the length of the string in bytes.
If the input is a VECTOR3, its size is always 3.
If the input is an array, its size is stored in the v_array.size field.
If the input is none of the above, return -1.