QGraphicsAnchorLayout: return a struct instead of a QList

... of QLists. The returned list was only ever exactly of
size one or two, and two only if a local QList in the
getGraphParts() function was not empty.

Instead of using a QList to return those QLists, use a
small struct of two QLists. This way, we avoid copying,
memory allocations, and the code becomes a lot clearer,
because we can give the members of the struct meaningful
names, instead of at(0) and at(1).

As a consequence, at the call site, the loop over the
result can now be collapsed into an if.

Saves ~1200b in text size on optimized GCC 5.3 Linux
AMD64 builds.

Change-Id: I5c2a3b3be0edcc418b310551abca51c410aca7c8
Reviewed-by: Thiago Macieira <[email protected]>

0 files changed, 0 insertions, 0 deletions