Struct RustObjAccess 

pub struct RustObjAccess<T: ?Sized> { /* private fields */ }

Manages shared access to a Rust object across the Rust/C++ boundary.

When Rust calls into C++ and C++ calls back into Rust, the inner callback cannot re-borrow the RefCell without panicking. This struct solves this by caching a raw pointer before crossing into C++ and restoring it as a reference on the way back, avoiding a second borrow while preserving a valid borrow stack per the “Stacked Borrows” aliasing model.

Implementations

impl<T: ?Sized> RustObjAccess<T>

pub fn new_strong(ptr: Rc<RefCell<T>>) -> Self

Create an instance that hold a strong reference to the Rust object. This is the case for objects created on the QML Side (QML Element).

pub fn new_weak(ptr: Weak<RefCell<T>>) -> Self

Create an instance that holds a weak (Weak<RefCell<T>>) reference to the Rust object. This is the case for objects created on the Rust Side.

pub fn try_call_rust_with_handle<F, R>( &self, f: F, ) -> Result<R, RustObjAccessError>

where F: FnOnce(&T) -> R,

pub fn try_call_rust_with_handle_mut<F, R>( &self, f: F, ) -> Result<R, RustObjAccessError>

where F: FnOnce(&mut T) -> R,

pub fn try_store_handle_and_call_cpp<F, R>( &self, rust_obj: &T, f: F, ) -> Result<R, RustObjAccessError>

where F: FnOnce() -> R,

pub fn try_store_handle_and_call_cpp_mut<F, R>( &self, rust_obj: &mut T, f: F, ) -> Result<R, RustObjAccessError>

where F: FnOnce() -> R,

pub fn get_rc(&self) -> Option<Rc<RefCell<T>>>