Struct KeyFn 

pub struct KeyFn<T: 'static, K: 'static>(pub Rc<dyn Fn(&T) -> K + 'static>);

Fn(&T) -> K — the “key extractor” closure for a keyed-list control flow. Items whose keys match across reactive reruns reuse their owners + per-item state.

Tuple Fields

0: Rc<dyn Fn(&T) -> K + 'static>

Implementations

impl<T: 'static, K: 'static> KeyFn<T, K>

pub fn call(&self, item: &T) -> K

Invoke the wrapped closure on item.

Trait Implementations

impl<T: 'static, K: 'static> Clone for KeyFn<T, K>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: 'static, K: 'static, F: Fn(&T) -> K + 'static> From<F> for KeyFn<T, K>

fn from(f: F) -> Self

Converts to this type from the input type.