Qt's MOC getting replicated in D for Calypso

[Elie Morisse via Digitalmars-d-announce]

Hi all,

I now have a working D replacement for moc:

   
https://github.com/Syniurge/Calypso/blob/master/tests/calypso/qt5/moc

For those unfamiliar with Qt, moc (the Meta-Object Compiler) is a 
tool that generates additional code for Qt classes, code then 
used by the signal/slot system, properties and other Qt-specific 
extensions. While C++ moc is not going away for probably a very 
long time 
(http://woboq.com/blog/reflection-in-cpp-and-qt-moc.html), D's 
compile-time reflection makes it possible to replicate moc's 
functionality entirely with templates and CTFE, with the help of 
some Calypso features: C++ template instantiation, overriding C++ 
virtual methods, and member function pointers.

Calypso had been partially supporting Qt5 for a while and there 
was a Qt5 demo written by Kelly Wilson, but to work around the 
lack of moc he had to write an intermediate C++ class with 
virtual slots and the signal <-> slot connections were done in 
C++ code.

Now everything is in D:

   
https://github.com/Syniurge/Calypso/blob/master/tests/calypso/qt5/qt5demo.d

The moc package is as faithful as possible to Qt 5.5.0's moc. 
It's not finished yet (missing: properties, class info) but 
signals, slots and connections are working, making Qt 5 
development in D much more practical than before.