This happens when default arguments (specifically
user class or enum types) and passed between keyword
and positional arguments. We must not use a temporary
tl::Variant object as it gets out of scope and a
reference is stored.
In addition: better error messages for Python when
a method can't be matched to arguments.
Needed to represent QIODeviceBase as a second base class for
QIOdevice, QFile etc. Additional base classes are supported but
in a rather limited way. They only contribute constants like enums.
No methods can be provided this way (a limitation of the method
enumeration scheme which only supports one base classe)
Because long is 32bit on Windows (like int), the
conversion from long to unsigned int was subject
to sign overflow. This was fixed by going to
unsigned int via unsigned long.
Reimplementing virtual functions with
"const &" arguments wasn't behaving as
expected because these arguments were
copied.
Now, "const &" for arguments (in virtual
function reimplementation) is not implemented
as a copy.
In addition, now it's possible to declare
results as references always (also if const &).
See gsiTest.cc:1078 for example:
// gsi::arg_make_reference makes the function's return value
// always being taken as a reference
gsi::method<C_P, const CopyDetector &, const CopyDetector &, gsi::arg_make_reference> ("pass_cd_cref_as_ref", &C_P::pass_cd_cref)