In addition to the use of opaque pointer type, the PDF adds pointers and function pointers to struct only for the sake of "object oriented". They waste space an

In addition to the use of opaque pointer type, the PDF adds pointers and function pointers to struct only for the sake of "object oriented". They waste space and again obfuscate code. The PDF represents a bad practice we should stop populating. I have only seen such coding style once and the developer said it was just a toy project he himself wouldn't use in practice.