Struct starlark::values::FrozenRef

pub struct FrozenRef<'f, T: 'f + ?Sized> { /* private fields */ }

A FrozenRef is essentially a FrozenValue, and has the same memory and access guarantees as it. However, this keeps the type of the type T of the actual FrozenValue as a reference, allowing manipulation of the actual typed data.

Implementations

impl<'f, T: 'f + ?Sized> FrozenRef<'f, T>

pub fn as_ref(self) -> &'f T

Returns a reference to the underlying value.

pub fn map<F, U: 'f + ?Sized>(self, f: F) -> FrozenRef<'f, U>

where for<'v> F: FnOnce(&'v T) -> &'v U,

Converts self into a new reference that points at something reachable from the previous.

pub fn try_map_result<F, U: 'f + ?Sized, E>( self, f: F ) -> Result<FrozenRef<'f, U>, E>

where for<'v> F: FnOnce(&'v T) -> Result<&'v U, E>,

Fallible map the reference to another one.

pub fn try_map_option<F, U: 'f + ?Sized>(self, f: F) -> Option<FrozenRef<'f, U>>

where for<'v> F: FnOnce(&'v T) -> Option<&'v U>,

Optionally map the reference to another one.

Trait Implementations

impl<'f, T: 'f + ?Sized> Allocative for FrozenRef<'f, T>

fn visit<'allocative_a, 'allocative_b: 'allocative_a>( &self, visitor: &'allocative_a mut Visitor<'allocative_b> )

impl<'f, T: 'f + ?Sized> Borrow<T> for FrozenRef<'f, Box<T>>

fn borrow(&self) -> &T

Immutably borrows from an owned value.

impl<'f, T: 'f + ?Sized> Borrow<T> for FrozenRef<'f, T>

fn borrow(&self) -> &T

Immutably borrows from an owned value.

impl<'f, T: 'f + ?Sized> Clone for FrozenRef<'f, T>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'f, T: Debug + 'f + ?Sized> Debug for FrozenRef<'f, T>

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

Formats the value using the given formatter.

impl<'f, T> Default for FrozenRef<'f, [T]>

fn default() -> FrozenRef<'f, [T]>

Returns the “default value” for a type.

impl<'f, T: ?Sized> Deref for FrozenRef<'f, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<'f, T: ?Sized + Display> Display for FrozenRef<'f, T>

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

Formats the value using the given formatter.

impl<'f, T: 'f + ?Sized> Dupe for FrozenRef<'f, T>

fn dupe(&self) -> Self

impl<'f, T: 'f + ?Sized> Freeze for FrozenRef<'f, T>

type Frozen = FrozenRef<'f, T>

When type is frozen, it is frozen into this type.

fn freeze(self, _freezer: &Freezer) -> Result<Self::Frozen>

Freeze a value. The frozen value must be equal to the original, and produce the same hash.

impl<'f, T> Hash for FrozenRef<'f, T>

where T: Hash + 'f + ?Sized,

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<'f, T> Ord for FrozenRef<'f, T>

where T: Ord + 'f + ?Sized,

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 + PartialOrd,

Restrict a value to a certain interval.

impl<'f, T> PartialEq for FrozenRef<'f, T>

where T: PartialEq + 'f + ?Sized,

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

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

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

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

impl<'f, T> PartialOrd for FrozenRef<'f, T>

where T: PartialOrd + 'f + ?Sized,

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: &Rhs) -> bool

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

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

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

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

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

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

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

impl<'v, 'f, T: 'f + ?Sized> Trace<'v> for FrozenRef<'f, T>

fn trace(&mut self, _: &Tracer<'v>)

Recursively “trace” the value.

impl<'f, T: 'f + ?Sized> Copy for FrozenRef<'f, T>

impl<'f, T> Eq for FrozenRef<'f, T>

where T: Eq + 'f + ?Sized,