The custom matching function was added in 4d4857027db3 with the rationale
that people were mixing up Key_hyphen and Key_Minus all the time, and
tried to solve it by treating the two as one and the same in the match
function.
Unfortunately this doesn't work in practice, as when a keyboard event
comes in we resolve a set of possible key sequences from that, and then
look those up in the list of sorted shortcut sequences. That lookup
is just a binary search, and does not take into account the added
logic of the custom matching function. So the binary search will fail
to find the matching key sequence, and as a result we never get a chance
to call matches() with a potentially malleable key sequence (for example
Qt::Key_Minus when the shortcut is Qt::Key_hyphen or vice versa).
The only case we do hit the matches function is if we by chance happen
to land the binary search iterator on the "unmatched" shortcut, e.g.
Qt::Key_hyphen, but this relies on there not being any other shortcuts
that sort between Qt::Key_Minus and Qt::Key_hyphen.
Task-number: QTBUG-116873
Change-Id: Iaa90991911f32276e29e37e8c7ae87643898bfc9
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
0bfb25d178