Local

Struct Local 

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pub struct Local;
Expand description

Marker type indicating that a report is not Send or Sync.

This marker is used when a report contains thread-local data that cannot be safely sent between threads or shared across threads. Common examples include Rc, raw pointers, or types that explicitly opt out of Send/Sync.

§When to Use

Use Local when your error context or attachments contain:

  • Rc<T> or Weak<T> (use Arc<T> for thread-safe alternative)
  • Raw pointers (*const T, *mut T)
  • Types that wrap thread-local storage
  • Any type that is !Send or !Sync

§Converting to Local

You can convert a thread-safe report to a local one using into_local, or create a local report directly when the context type is not Send + Sync.

§Examples

use std::rc::Rc;

use rootcause::prelude::*;

// Rc is not Send or Sync, so the report must be Local
let local_data: Rc<String> = Rc::new("Thread-local error".to_string());
let report: Report<Rc<String>, markers::Mutable, markers::Local> = report!(local_data);

// This report cannot be sent to another thread
// std::thread::spawn(move || {
//     println!("{}", report); // ❌ Won't compile
// });

Converting a thread-safe report to local:

use std::rc::Rc;

use rootcause::prelude::*;

let report: Report<String> = report!("Error".to_string());

// Convert to local report so we can use thread-local data
let local_report: Report<String, markers::Mutable, markers::Local> = report.into_local();

Trait Implementations§

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impl Clone for Local

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fn clone(&self) -> Local

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Local

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

Formats the value using the given formatter. Read more
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impl Default for Local

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fn default() -> Local

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

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<C: ?Sized, O, T> IntoReport<Local> for Report<C, O, T>

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type Context = C

The context type of the resulting report.
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type Ownership = O

The ownership marker of the resulting report.
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fn into_report(self) -> Report<Self::Context, Self::Ownership, Local>

Converts self into a Report with the specified thread-safety marker. Read more
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impl<C, O, T> IntoReportCollection<Local> for Report<C, O, T>

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type Context = C

The context type of the resulting report collection.
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fn into_report_collection(self) -> ReportCollection<Self::Context, Local>

Converts self into a ReportCollection with the specified thread-safety marker. Read more
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impl<C, T> IntoReportCollection<Local> for ReportCollection<C, T>
where C: ?Sized,

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type Context = C

The context type of the resulting report collection.
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fn into_report_collection(self) -> ReportCollection<Self::Context, Local>

Converts self into a ReportCollection with the specified thread-safety marker. Read more
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impl Ord for Local

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fn cmp(&self, other: &Local) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl PartialEq for Local

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Local

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Copy for Local

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impl Eq for Local

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impl StructuralPartialEq for Local

Auto Trait Implementations§

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impl Freeze for Local

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impl RefUnwindSafe for Local

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impl Send for Local

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impl Sync for Local

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impl Unpin for Local

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impl UnwindSafe for Local

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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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> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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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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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<O> ObjectMarkerFor<Local> for O
where O: 'static,

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impl<O> ObjectMarkerFor<SendSync> for O
where O: 'static + Send + Sync,

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> OpaqueAttachment for T
where T: Send + Sync + 'static,