C++ builder标识求解

class PASCALIMPLEMENTATION TTreeNode : public Classes::TPersistent 


这句该怎么理解，谢谢!

声明一个类TTreeNode 继承自TPersistent  

PASCALIMPLEMENTATION 是表示从delphi（PACSL）的pas文件描述而来的类吧

The pascalimplementation argument indicates that the code defining the class was implemented in Object Pascal. This modifier appears in an Object Pascal portability header file with an .hpp extension.