Struct Keep 

pub struct Keep<Behavior, Element> { /* private fields */ }

Will keep only the first or the last Element that was feed to it.

Trait Implementations

impl<Element, Atom: Into<Element>> Add<Atom> for Keep<First, Element>

type Output = Keep<First, Element>

The resulting type after applying the + operator.

fn add(self, _context: Atom) -> Self

Performs the + operation.

impl<Context, Atom: Into<Context>> Add<Atom> for Keep<Last, Context>

type Output = Keep<Last, Context>

The resulting type after applying the + operator.

fn add(self, context: Atom) -> Self

Performs the + operation.

impl<Element> BitOr for Keep<First, Element>

type Output = Keep<First, Element>

The resulting type after applying the | operator.

fn bitor(self, _other: Self) -> Self

Performs the | operation.

impl<Context> BitOr for Keep<Last, Context>

type Output = Keep<Last, Context>

The resulting type after applying the | operator.

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

Performs the | operation.

impl<Behavior: Clone, Element: Clone> Clone for Keep<Behavior, Element>

fn clone(&self) -> Keep<Behavior, Element>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Behavior, Element: Display, Atom: Into<Element>> Contexting<Atom> for Keep<Behavior, Element>

where Self: Add<Atom, Output = Self> + BitOr<Output = Self>,

fn new(context: Atom) -> Self

Create a new Context from a Atom. Implementation should try to avoid allocate for only one Atom.

impl<Behavior: Debug, Element: Debug> Debug for Keep<Behavior, Element>

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

Formats the value using the given formatter.

impl<Behavior: Default, Element: Default> Default for Keep<Behavior, Element>

fn default() -> Keep<Behavior, Element>

Returns the “default value” for a type.

impl<Behavior: Hash, Element: Hash> Hash for Keep<Behavior, Element>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<Behavior: Ord, Element: Ord> Ord for Keep<Behavior, Element>

fn cmp(&self, other: &Keep<Behavior, Element>) -> 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.

impl<Behavior: PartialEq, Element: PartialEq> PartialEq for Keep<Behavior, Element>

fn eq(&self, other: &Keep<Behavior, Element>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<Behavior: PartialOrd, Element: PartialOrd> PartialOrd for Keep<Behavior, Element>

fn partial_cmp(&self, other: &Keep<Behavior, Element>) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

impl<Behavior, Element: Display> ProvideElement for Keep<Behavior, Element>

type Element = Element

Element associate with a Context. This is often an enum of different Atom.

fn last(&self) -> &Self::Element

return the last Element added to a Context

impl<Behavior: Eq, Element: Eq> Eq for Keep<Behavior, Element>

impl<Behavior, Element> StructuralPartialEq for Keep<Behavior, Element>