Trait HasEmpty 

pub trait HasEmpty {
    // Required method
    fn empty(&self) -> bool;
}

Represents types that have emptiness-checking capabilities.

Required Methods

fn empty(&self) -> bool

Checks whether the value is empty.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl HasEmpty for CStr

fn empty(&self) -> bool

impl HasEmpty for CString

fn empty(&self) -> bool

impl HasEmpty for OsStr

fn empty(&self) -> bool

impl HasEmpty for OsString

fn empty(&self) -> bool

impl HasEmpty for Path

fn empty(&self) -> bool

impl HasEmpty for PathBuf

fn empty(&self) -> bool

impl HasEmpty for String

fn empty(&self) -> bool

impl HasEmpty for str

fn empty(&self) -> bool

impl<K, V, S> HasEmpty for HashMap<K, V, S>

fn empty(&self) -> bool

impl<K, V> HasEmpty for BTreeMap<K, V>

fn empty(&self) -> bool

impl<T, S> HasEmpty for HashSet<T, S>

fn empty(&self) -> bool

impl<T: HasEmpty + ?Sized> HasEmpty for &T

fn empty(&self) -> bool

impl<T: HasEmpty + ?Sized> HasEmpty for Arc<T>

fn empty(&self) -> bool

impl<T: HasEmpty + ?Sized> HasEmpty for Box<T>

fn empty(&self) -> bool

impl<T: HasEmpty + ?Sized> HasEmpty for Rc<T>

fn empty(&self) -> bool

impl<T: ToOwned + HasEmpty + ?Sized> HasEmpty for Cow<'_, T>

fn empty(&self) -> bool

impl<T> HasEmpty for BTreeSet<T>

fn empty(&self) -> bool

impl<T> HasEmpty for BinaryHeap<T>

fn empty(&self) -> bool

impl<T> HasEmpty for LinkedList<T>

fn empty(&self) -> bool

impl<T> HasEmpty for Vec<T>

fn empty(&self) -> bool

impl<T> HasEmpty for VecDeque<T>

fn empty(&self) -> bool

impl<T> HasEmpty for [T]

fn empty(&self) -> bool

Implementors