Calypso just got a D translation of the first Qt5 Widgets
tutorial building and running:
Compilation log: https://paste.kde.org/pewbbsw45
Previously Calypso was merely able to work with STL types, this
is the first time a large C++ library is successfully mapped and
used by D code (Ogre3D is probably close as well, but after
Kagamin's suggestion and for a change of scene I switched my
focus from Ogre3D to Qt).