Trait WithObserver

pub trait WithObserver {
    // Required methods
    fn with_observer<T>(&self, fun: impl FnOnce() -> T) -> T;
    fn with_observer_untracked<T>(&self, fun: impl FnOnce() -> T) -> T;
}

Runs code with some subscriber as the thread-local Observer.

Required Methods

fn with_observer<T>(&self, fun: impl FnOnce() -> T) -> T

Runs the given function with this subscriber as the thread-local Observer.

fn with_observer_untracked<T>(&self, fun: impl FnOnce() -> T) -> T

Runs the given function with this subscriber as the thread-local Observer, but without tracking dependencies.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl WithObserver for Option<AnySubscriber>

fn with_observer<T>(&self, fun: impl FnOnce() -> T) -> T

fn with_observer_untracked<T>(&self, fun: impl FnOnce() -> T) -> T

Implementors

impl WithObserver for AnySubscriber