Struct Context Init Handle &nbsp; Copy item path

impl ContextInitHandle

pub fn new() -> ContextInitHandle

Generates a new unique handle.

pub const fn no_context() -> ContextInitHandle

Identifies the state before first contextualization.

This is the default value.

pub fn current() -> ContextInitHandle

Gets the current context handle.

§Panics

Panics is not called in an app context at least, never returns no_context.

pub fn is_no_context(&self) -> bool

Handle represents the state before first contextualization.

pub fn with_context<R>(&self, action: impl FnOnce() -> R) -> R

Runs action with self as the current context ID.

Note that ContextVar::with_context already calls this method.

§Panics

Panics if the handle is_no_context.

pub fn downgrade(&self) -> WeakContextInitHandle

Create a weak handle that can be used to monitor this handle without holding it.

Trait Implementations§

impl Clone for ContextInitHandle

fn clone(&self) -> ContextInitHandle

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for ContextInitHandle

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

Formats the value using the given formatter. Read more

impl Default for ContextInitHandle

fn default() -> ContextInitHandle

Returns the “default value” for a type. Read more

impl PartialEq for ContextInitHandle

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

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

1.0.0 · Source§

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 Eq for ContextInitHandle

Auto Trait Implementations§

impl UnwindSafe for ContextInitHandle

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: Any + PartialEq,

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Swap value with other if both are of the same type.

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

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Returns the argument unchanged.

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Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more