Struct SessionMut 

pub struct SessionMut<'a, V: VortexSessionVar> { /* private fields */ }

A copy-on-write mutable handle to a session variable of type V, returned by SessionExt::get_mut.

It holds a private clone of the variable and exposes it through DerefMut. When the handle is dropped, the (possibly mutated) value is re-inserted into the session, replacing the previous one. Because the session stores each variable behind a shared Arc observed by every clone, handing out a plain &mut to the stored value would be unsound; this guard provides mutable access by cloning on read and publishing on drop instead.

Trait Implementations

impl<V: VortexSessionVar> Debug for SessionMut<'_, V>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<V: VortexSessionVar> Deref for SessionMut<'_, V>

type Target = V

The resulting type after dereferencing.

fn deref(&self) -> &V

Dereferences the value.

impl<V: VortexSessionVar> DerefMut for SessionMut<'_, V>

fn deref_mut(&mut self) -> &mut V

Mutably dereferences the value.

impl<V: VortexSessionVar> Drop for SessionMut<'_, V>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.