Struct pets::PetRef

pub struct PetRef<'a, T: ?Sized, P>(_, _);

A reference to a value that is accepted by a given predicate.

Methods

impl<'a, T: ?Sized, P: Pred<T>> PetRef<'a, T, P>

pub fn new(t: &'a T) -> Option<Self>

Attempts to create a new PetRef<'a, T, P> from a reference t.

If P accepts t, then the result is a Some(..) referring to t. Otherwise, None is returned.

pub unsafe fn new_unchecked(t: &'a T) -> Self

Creates a new PetRef<'a, T, P> from a reference t without checking if P accepts t.

pub fn value(&self) -> &'a T

Retrieves the reference contained in this PetRef<'a, T, P>.

Trait Implementations

impl<'a, T: ?Sized, P> Eq for PetRef<'a, T, P> where
    T: Eq, 

impl<'a, T: Clone + ?Sized, P: Clone> Clone for PetRef<'a, T, P>

fn clone(&self) -> PetRef<'a, T, P>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, T: ?Sized, P> AsRef<T> for PetRef<'a, T, P>

fn as_ref(&self) -> &T

Performs the conversion.

impl<'a, 'b, T: ?Sized, P, Q> PartialOrd<PetRef<'b, T, Q>> for PetRef<'a, T, P> where
    T: PartialOrd, 

fn partial_cmp(&self, o: &PetRef<'b, T, Q>) -> Option<Ordering>

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

fn lt(&self, o: &PetRef<'b, T, Q>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, o: &PetRef<'b, T, Q>) -> bool

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

fn gt(&self, o: &PetRef<'b, T, Q>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, o: &PetRef<'b, T, Q>) -> bool

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

impl<'a, 'b, T: ?Sized, P, Q> PartialEq<PetRef<'b, T, Q>> for PetRef<'a, T, P> where
    T: PartialEq, 

fn eq(&self, o: &PetRef<'b, T, Q>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, o: &PetRef<'b, T, Q>) -> bool

This method tests for !=.

impl<'a, T: ?Sized, P> Ord for PetRef<'a, T, P> where
    T: Ord, 

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

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

Restrict a value to a certain interval.

impl<'a, T: Copy + ?Sized, P: Copy> Copy for PetRef<'a, T, P>

impl<'a, T, P> Hash for PetRef<'a, T, P> where
    T: Hash, 

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl<'a, T: ?Sized, P> Debug for PetRef<'a, T, P> where
    T: Debug,
    P: Debug, 

fn fmt(&self, f: &mut Formatter) -> FmtResult

Formats the value using the given formatter.

impl<'a, T, P> Display for PetRef<'a, T, P> where
    T: Display, 

fn fmt(&self, f: &mut Formatter) -> FmtResult

Formats the value using the given formatter.

impl<'a, T: ?Sized, P> Borrow<T> for PetRef<'a, T, P>

fn borrow(&self) -> &T

Immutably borrows from an owned value.