Trait CheckEmpty

pub trait CheckEmpty: Default + Clone {
    // Required method
    fn is_empty(&self) -> bool;
}

Available on crate feature unstable only.

The CheckEmpty trait allows to check if a collection is empty.

Required Methods

fn is_empty(&self) -> bool

Returns true if the collection contains no elements.

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.

Implementations on Foreign Types

impl<K: Clone, V: Clone> CheckEmpty for BTreeMap<K, V>

fn is_empty(&self) -> bool

impl<T: Clone> CheckEmpty for Vec<T>

fn is_empty(&self) -> bool

Implementors