Struct KeyAndValue 

pub(crate) struct KeyAndValue<K, V> {
    pub key: K,
    pub value: V,
}

A pair where ordering and equality work on only the key, ignoring the value.

Used to implement Iterator::min_by_key as map+min, for example.

Fields

key: K

value: V

Trait Implementations

impl<K: Clone, V: Clone> Clone for KeyAndValue<K, V>

fn clone(&self) -> KeyAndValue<K, V>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

where Self:,

Performs copy-assignment from source.

impl<K: Copy, V: Copy> Copy for KeyAndValue<K, V>

impl<K: Debug, V: Debug> Debug for KeyAndValue<K, V>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<K: Eq, V> Eq for KeyAndValue<K, V>

#[doc(hidden)]

fn assert_receiver_is_total_eq(&self)

👎Deprecated since 1.95.0:

implementation detail of #[derive(Eq)]

#[doc(hidden)]

fn assert_fields_are_eq(&self)

🔬This is a nightly-only experimental API. (derive_eq_internals)

impl<K: Ord, V> Ord for KeyAndValue<K, V>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to #147781)

Restrict a value to a certain range.

impl<K: PartialEq, V> PartialEq for KeyAndValue<K, V>

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Self) -> bool

Inequality operator !=.

impl<K: PartialOrd, V> PartialOrd for KeyAndValue<K, V>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Self) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Self) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Self) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Self) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

#[doc(hidden)]

fn __chaining_lt(&self, other: &Rhs) -> ControlFlow<bool>

🔬This is a nightly-only experimental API. (partial_ord_chaining_methods)

If self == other, returns ControlFlow::Continue(()). Otherwise, returns ControlFlow::Break(self < other).

#[doc(hidden)]

fn __chaining_le(&self, other: &Rhs) -> ControlFlow<bool>

🔬This is a nightly-only experimental API. (partial_ord_chaining_methods)

Same as __chaining_lt, but for <= instead of <.

#[doc(hidden)]

fn __chaining_gt(&self, other: &Rhs) -> ControlFlow<bool>

🔬This is a nightly-only experimental API. (partial_ord_chaining_methods)

Same as __chaining_lt, but for > instead of <.

#[doc(hidden)]

fn __chaining_ge(&self, other: &Rhs) -> ControlFlow<bool>

🔬This is a nightly-only experimental API. (partial_ord_chaining_methods)

Same as __chaining_lt, but for >= instead of <.