pub trait Identity: Set {
// Required method
fn id(&self) -> Self::Element;
// Provided method
fn is_id(&self, a: &Self::Element) -> bool
where Self::Element: PartialEq { ... }
}Expand description
単位元をもつ
Required Methods§
Provided Methods§
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.