shwina commented on issue #34564:
URL: https://github.com/apache/arrow/issues/34564#issuecomment-1468855582
Right, my understanding is that Cython doesn't really know about rvalue references or move semantics. To generate correct C++ code involving functions that accept rvalue references, you can declare them as accepting type `T`, and explicitly use `move()` when passing arguments to them.
```cython
# distutils: language=c++
# extra_compile_args: -std=c++17
from libcpp.utility cimport move
cdef extern from *:
"""
class Foo {
public:
Foo() = default;
};
void bar(Foo&& x) {
return;
}
"""
cppclass Foo:
Foo()
void bar(Foo) # no need to declare this void bar(Foo&&)
cdef Foo f = Foo()
# bar(f) -> compile error bar(move(f)) # works
```
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