Trait ValueKey 

pub trait ValueKey:
    Send
    + Sync
    + 'static {
    // Required methods
    fn equals(&self, other: &dyn ValueKey) -> bool;
    fn hash_dyn(&self, state: &mut dyn Hasher);
    fn type_id(&self) -> TypeId;
    fn as_any(&self) -> &dyn Any;
}

上下文 Value key 约束：可比较、可哈希、’static。

Required Methods

fn equals(&self, other: &dyn ValueKey) -> bool

fn hash_dyn(&self, state: &mut dyn Hasher)

fn type_id(&self) -> TypeId

fn as_any(&self) -> &dyn Any

Implementors

impl<T> ValueKey for T

where T: Eq + Hash + Send + Sync + 'static,