QImage: add a qMove()

The color table is passed by value (good for C++11), so when
the argument is assigned to the member variable, that's a good
spot for a move assignment.

However, the argument is also declared const.

The standard says that top-level const is ignored, but some
compilers (I know about SunCC) think differently, so we cannot
remove it.

Instead, we do a const_cast. It is well-defined: Even though
apparently the argument was declared as const, the standard
says the const is not there, and no sane compiler would put
the argument copy into read-only memory.

Add a reminder to remove the top-level const from the
signature come Qt 6.

Change-Id: Iac18846ba669de0a30da620685ad1438c267e193
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

0 files changed, 0 insertions, 0 deletions