Struct EntityProjection 

pub struct EntityProjection<'b, T: 'b> { /* private fields */ }

Represents a projection of an EntityRef into an owned value.

This retains the lifetime of the borrow, while allowing the projection itself to be owned. This is useful in cases where you would like to return a value derived from an EntityRef from a function, when the borrowed entity outlives the function itself. Since EntityRef can only represent references, deriving owned (but semantically borrowed) values from an EntityRef cannot be returned from an enclosing function, unlike if the value was a reference.

NOTE: An EntityProjection takes ownership of the EntityRef from which it was derived, and propagates the lifetime of the borrowed entity. When this type is dropped, so is the original borrow.

Implementations

impl<'b, T> EntityProjection<'b, T>

pub fn map<U, F>(orig: Self, f: F) -> EntityProjection<'b, U>

where F: FnOnce(T) -> U,

Trait Implementations

impl<T: Debug> Debug for EntityProjection<'_, T>

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

Formats the value using the given formatter.

impl<T> Deref for EntityProjection<'_, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<T> DerefMut for EntityProjection<'_, T>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<T: Display> Display for EntityProjection<'_, T>

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

Formats the value using the given formatter.

impl<T: Hash> Hash for EntityProjection<'_, T>

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<T: Ord> Ord for EntityProjection<'_, T>

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.

impl<T: PartialEq> PartialEq for EntityProjection<'_, T>

fn eq(&self, other: &Self) -> 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<T: PartialOrd> PartialOrd for EntityProjection<'_, T>

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

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

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

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

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

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

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

impl<T: PrettyPrint> PrettyPrint for EntityProjection<'_, T>

fn render(&self) -> Document

The core of the PrettyPrint functionality.

fn to_pretty_string(&self) -> String

Produce a String containing the results of pretty-printing this object.

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

Pretty-print this object to the given core::fmt::Formatter.

impl<T: Eq> Eq for EntityProjection<'_, T>