Struct TempInst

pub struct TempInst<'a, T: TempRepr + 'a>(/* private fields */);

A wrapper around an instance of T which implements TempRepr, i.e. is a temporary representation of a type T::Shared<'a>.

TempInst itself has a lifetime parameter 'a and borrows the object passed to TempInst::new for that lifetime; therefore it is logically equivalent to T::Shared<'a>. However, it can hand out references to the lifetime-less type T via its Deref implementation.

See the module documentation for usage examples.

Implementations

impl<'a, T: TempRepr> TempInst<'a, T>

pub fn new(obj: T::Shared<'a>) -> Self

Creates a TempInst from an instance of T::Shared. Note that T::Shared is always the non-mutable variant of T; e.g. even if T is TempRefMut<X>, T::Shared is &X, not &mut X.

A shared reference to T can be obtained from the result via Deref.

pub fn call_with<R>(obj: T::Shared<'a>, f: impl FnOnce(&T) -> R) -> R

Calls f with a shared reference to T which is constructed from obj, and returns the value returned by f.

This method exists for consistency (with respect to TempInstMut::call_with), but is actually just a trivial application of Self::new and Deref::deref.

Trait Implementations

impl<'a, T: Clone + TempRepr + 'a> Clone for TempInst<'a, T>

where T::Shared<'a>: Clone,

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: TempRepr + Debug> Debug for TempInst<'_, T>

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

Formats the value using the given formatter.

impl<'a, T: TempRepr<Shared<'a>: Default>> Default for TempInst<'a, T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: TempRepr> Deref for TempInst<'_, T>

type Target = T

The resulting type after dereferencing.

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

Dereferences the value.

impl<T: TempRepr + Display> Display for TempInst<'_, T>

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

Formats the value using the given formatter.

impl<'a, T: Hash + TempRepr + 'a> Hash for TempInst<'a, T>

where T::Shared<'a>: Hash,

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<'a, T: Ord + TempRepr + 'a> Ord for TempInst<'a, T>

where T::Shared<'a>: Ord,

fn cmp(&self, other: &TempInst<'a, T>) -> 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<'a, T: PartialEq + TempRepr + 'a> PartialEq for TempInst<'a, T>

where T::Shared<'a>: PartialEq,

fn eq(&self, other: &TempInst<'a, T>) -> 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<'a, T: PartialOrd + TempRepr + 'a> PartialOrd for TempInst<'a, T>

where T::Shared<'a>: PartialOrd,

fn partial_cmp(&self, other: &TempInst<'a, T>) -> 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<'a, T: Copy + TempRepr + 'a> Copy for TempInst<'a, T>

where T::Shared<'a>: Copy,

impl<'a, T: Eq + TempRepr + 'a> Eq for TempInst<'a, T>

where T::Shared<'a>: Eq,

impl<'a, T: TempRepr + 'a> StructuralPartialEq for TempInst<'a, T>