That doesn't help.

Those class names just tell you the type of scalar, but nothing about the value within.

For example, if you get B::IV, all you know is that the scalar contains one of the following:

• Nothing (undef)
• A signed integer
• An unsigned integer
• A reference

For example, if you get B::PVIV, all you know is that the scalar contains one of the following:

• Nothing (undef)
• A signed integer
• An unsigned integer
• A string
• A reference
• A signed integer and a string
• An unsigned integer and a string