In the presence of multiple overloads of a function taking either
QString or QStringView, QStringView should always be preferred.
The rationale is that the QStringView overload may have been
added "later" (read: the function was written when QStringView
was not available yet, so it took QString), and the fact that
a function with the _same name_ offers a QStringView overload
implies the function never needed to store/own the string in
the first place.
Add a (compile-time) test for this preference. This is in
preparation for a future QString(char16_t*) constructor
(in Qt 5.15 / Qt 6).
Change-Id: I60a435e494b653548f8f8d52c5d7e7cac2cc875a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
As a macro, we can't directly deprecate it, but need to make it call
something deprecated. That is a new ctor with a new enum type
added. The type might be useful for other such ventures, so put it
into qglobal.h
Remove the QT_NO_UNICODE_LITERAL protection, as it's always false
these days, and QT_UNICODE_LITERAL is unconditionally #defined a 20
lines above.
[ChangeLog][QtCore][QStringView] Deprecated the (undocumented)
QStringViewLiteral macro. Just use u"" or QStringView(u"") instead.
Change-Id: I9141320225037e1bc6b7f920bf01a9d0144fdac2
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Now that all our supported compilers know char16_t, we no longer need
QStringViewLiteral, whose only purpose in life was to turn u"" into
L"" for MSVC < 2015.
Change-Id: I25a094fe7992d9d5dbeb4a524d9e99e043dcb8ce
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
