QStringView: add internal qToStringViewIgnoringNull()

As long as a null QString still returns non-null data(), QStringView's
QString constructor needs to call isNull(). That's a branch we often
can do without, so add an internal function that bypasses this
correctness check.

It's internal, since we might have a Q6String that returns nullptr
data() when null, which will remove the need for this function.

What the QStringView(QString) ctor does will also have to be
re-evaluated come Qt 6, but for now, keep the public QString-
QStringView conversion correct.

Change-Id: I35dc7383bc3bd018f46aeec429185135a38ddcef
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

0 files changed, 0 insertions, 0 deletions