Trait IsEmpty

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

Trait defining instance method is_empty() : bool that indicates whether the implementing type instance is logically empty.

Additional Implementations on Foreign Types

Built-in Types

If the feature "implement-IsEmpty-for-built_ins" is defined (as it is by "default"), then this is also implemented for the following types:

• str;
• [T; N];
• [T];

Standard Collection Types

If the feature "implement-IsEmpty-for-standard_collection_types" is defined (as it is by "default"), then this is also implemented for the following types:

• [std::collections::BTreeMap<>];
• [std::collections::BTreeSet<>];
• [std::collections::BinaryHeap<>];
• [std::collections::HashMap<>];
• [std::collections::HashSet<>];
• [std::collections::LinkedList<>];
• String;
• [Vec<>];
• [std::collections::VecDeque<>];

Standard FFI Types

If the feature "implement-IsEmpty-for-standard_ffi_types" is defined (as it is by "default"), then this is also implemented for the following types:

• std::ffi::CStr;
• std::ffi::CString;

Standard Path Types

If the feature "implement-IsEmpty-for-standard_path_types" is defined (as it is by "default"), then this is also implemented for the following types:

• std::path::Path;
• std::path::PathBuf;

Standard Process Types

If the feature "implement-IsEmpty-for-standard_process_types" is defined (as it is by "default"), then this is also implemented for the following types:

• std::process::CommandArgs;
• std::process::CommandEnvs;

Standard Range Types

If the feature "implement-IsEmpty-for-standard_range_types" is defined (as it is by "default"), then this is also implemented for the following types:

• [std::ops::Range<>];
• [std::ops::RangeFrom<>];
• std::ops::RangeFull;
• [std::ops::RangeInclusive<>];
• [std::ops::RangeTo<>];

Standard Time Types

If the feature "implement-IsEmpty-for-standard_process_types" is defined (which is NOT by "default"), then this is also implemented for the following types:

• std::time::Duration;

Required Methods

fn is_empty(&self) -> bool

Implementations on Foreign Types

impl IsEmpty for &str

fn is_empty(&self) -> bool

impl IsEmpty for &CStr

fn is_empty(&self) -> bool

impl IsEmpty for &Path

fn is_empty(&self) -> bool

impl IsEmpty for &PathBuf

fn is_empty(&self) -> bool

impl IsEmpty for str

fn is_empty(&self) -> bool

impl IsEmpty for CString

fn is_empty(&self) -> bool

impl IsEmpty for String

fn is_empty(&self) -> bool

impl IsEmpty for CStr

fn is_empty(&self) -> bool

impl IsEmpty for RangeFull

fn is_empty(&self) -> bool

impl IsEmpty for PathBuf

fn is_empty(&self) -> bool

impl<Idx> IsEmpty for RangeFrom<Idx>

fn is_empty(&self) -> bool

impl<Idx> IsEmpty for RangeTo<Idx>

fn is_empty(&self) -> bool

impl<Idx: PartialOrd> IsEmpty for Range<Idx>

fn is_empty(&self) -> bool

impl<Idx: PartialOrd> IsEmpty for RangeInclusive<Idx>

fn is_empty(&self) -> bool

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

fn is_empty(&self) -> bool

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

fn is_empty(&self) -> bool

impl<T> IsEmpty for &[T]

fn is_empty(&self) -> bool

impl<T> IsEmpty for [T]

fn is_empty(&self) -> bool

impl<T> IsEmpty for BinaryHeap<T>

fn is_empty(&self) -> bool

impl<T> IsEmpty for BTreeSet<T>

fn is_empty(&self) -> bool

impl<T> IsEmpty for LinkedList<T>

fn is_empty(&self) -> bool

impl<T> IsEmpty for VecDeque<T>

fn is_empty(&self) -> bool

impl<T> IsEmpty for Vec<T>

fn is_empty(&self) -> bool

impl<T> IsEmpty for HashSet<T>

fn is_empty(&self) -> bool

impl<T, const N: usize> IsEmpty for &[T; N]

fn is_empty(&self) -> bool

impl<T, const N: usize> IsEmpty for [T; N]

fn is_empty(&self) -> bool

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

fn is_empty(&self) -> bool

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

fn is_empty(&self) -> bool

Implementors