Stephan Bergmann
485c9d4f0e
...which had been introduced in 78040af9ac
"loplugin:refcounting in sc" as a variation on css::uno::WeakReference from
include/cppuhelper/weakref.hxx, but without giving much of a rationale.
And, at least for --with-latest-c++ builds using a capable C++20 compiler,
ensure that the given interface_type is such that the static_cast and
dynamic_cast in the implementation of unotools::WeakReference::get are actually
sound: If interface_type could be a UNO interface type, that would imply that
the xInterface obtained from the underlying WeakReferenceHelper::get() could be
a proxy from the C++ UNO bridge, which could (a) be a proxy for only a subtype
of interface_type (e.g., just for XInterface), so that the static_cast would be
broken, and (b) be a proxy for which the vtable's RTTI slot is not set up (see
e.g. the ENABLE_RUNTIME_OPTIMIZATIONS code in
bridges::cpp_uno::shared::VtableFactory::initializeBlock in
bridges/source/cpp_uno/gcc3_linux_x86-64/cpp2uno.cxx), so that the dynamic_cast
could crash. (These issues can even happen when the given interface_type is a
C++ implementation class type, but the given object has been bridged over some
C++ to C++ UNO ("purpose") bridge, but lets leave it at that...)
This required adding some cppu::detail::isUnoInterfaceType predicate to the
include files generated by cppumaker, which can be useful in other places too.
(For the call to isUnoInterfaceType in the requires-clause of
unotools::WeakReference<interface_type>::get to give the correct answer, it is
important that interface_type is a complete type---i.e., the corresponding
codemaker-generated .hpp having been included if interface_type actually were a
UNO include type. But that is already nicely required by the call to
std::is_convertible_v in the implementation of that function, anyway.)
Change-Id: Ia5efd70085d2d6d45fa0995d00dc8def564bbe5f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/143601
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Language Code Generators for UNOIDL Entities
Generators for language-binding--specific representations of UNOIDL entities:
cppumakergenerates header (.hdland.hpp) files for the C++ UNO language bindingjavamakergenerates class files for the JVM language binding- the codemaker for .NET is in module
cli_ure
Some of the code is re-used by the skeletonmakers in module unodevtools.
Note the different terminology used by cppumaker vs. gbuild for the three variants that can be generated by cppumaker for some of the inline functions:
cppumaker switch: -L; cpputype.cxx: light; gbuild: normal;
cppumaker switch: none; cpputype.cxx: normal; gbuild: bootstrap;
cppumaker switch: -C; cpputype.cxx: comprehensive; gbuild: comprehensive;
which can be a source of confusion.