Trait IsEmpty 

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

Things that can be “empty”.

Required Methods

fn is_empty(&self) -> bool

Implementations on Foreign Types

impl IsEmpty for str

fn is_empty(&self) -> bool

impl IsEmpty for CString

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl IsEmpty for String

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl IsEmpty for CStr

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl IsEmpty for OsStr

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl IsEmpty for OsString

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl<'a, T: IsEmpty + ?Sized> IsEmpty for &'a T

fn is_empty(&self) -> bool

impl<'a, T: IsEmpty + ?Sized> IsEmpty for &'a mut T

fn is_empty(&self) -> bool

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

Available on crate feature use_std only.

fn is_empty(&self) -> bool

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

where K: Eq + Hash, S: BuildHasher,

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl<T> IsEmpty for [T]

fn is_empty(&self) -> bool

impl<T> IsEmpty for Vec<T>

Available on crate feature use_std only.

fn is_empty(&self) -> bool

impl<T: IsEmpty> IsEmpty for Option<T>

fn is_empty(&self) -> bool

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

Available on crate feature use_std only.

fn is_empty(&self) -> bool

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

Available on crate feature use_std only.

fn is_empty(&self) -> bool

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

Available on crate feature use_std only.

fn is_empty(&self) -> bool

Implementors