Add CxxVector::new for creating an empty vector

[capickett]

When constructing a CxxVector to pass to C++, you have to end up writing your own utility function that constructs a UniquePtr<CxxVector<...>> and add that to your projects cxx bridge. Creating an empty vector seems like a simple enough task to afford having an API for it on CxxVector.

[dtolnay]

Thanks, looks good so far. You'll also need some changes in gen/src/write.rs (this is why linking failed with MSVC in CI).

[capickett]

Thanks, looks good so far. You'll also need some changes in gen/src/write.rs (this is why linking failed with MSVC in CI).

Thanks for the pointer!

[dtolnay]

Thanks!

[dtolnay]

Published in cxx 1.0.107.