[SOLVED] Meaning of Q_D in Qt source code

[A Former User]

Searched the web site for this code (from Qt 5.4.1 source code), and couldn't find any information:

Q_D(QXmlStreamReader);

What does Q_D mean?

[mcosta]

Hi and welcome to devnet,

Qt uses the pimpl pattern in source code.
Each class define a Private class that hide the private part of a class in the header files.
Q_D is a macro used to create/manage this private implementation.

IIRC in the wiki there's an article related to this topic

[mcosta]

hi, the article is here

[A Former User]

@mcosta Thank you. The provided link gave a good instro on this.