Node in miri::borrow_tracker::tree_borrows::tree - Rust
Description: A node in the borrow tree. Each node is uniquely identified by a tag via the `nodes` map of `Tree`.

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## Node

# Struct Node

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    pub(super) struct Node {
        pub tag: BorTag,
        pub parent: Option<UniIndex>,
        pub children: SmallVec<[UniIndex; 4]>,
        default_initial_perm: Permission,
        default_initial_idempotent_foreign_access: IdempotentForeignAccess,
        pub is_exposed: bool,
        pub debug_info: NodeDebugInfo,
    }

Expand description

A node in the borrow tree. Each node is uniquely identified by a tag via the `nodes` map of `Tree`.

## Fields§

§`tag: BorTag`

The tag of this node.

§`parent: Option<UniIndex>`

All tags except the root have a parent tag.

§`children: SmallVec<[UniIndex; 4]>`

If the pointer was reborrowed, it has children.

§`default_initial_perm: Permission`

Either `Reserved`, `Frozen`, or `Disabled`, it is the permission this tag will lazily be initialized to on the first access. It is only ever `Disabled` for a tree root, since the root is initialized to `Unique` by its own separate mechanism.

§`default_initial_idempotent_foreign_access: IdempotentForeignAccess`

The default initial (strongest) idempotent foreign access. This participates in the invariant for `LocationState::idempotent_foreign_access` in cases where there is no location state yet. See `foreign_access_skipping.rs`, and `LocationState::idempotent_foreign_access` for more information

§`is_exposed: bool`

Whether a wildcard access could happen through this node.

§`debug_info: NodeDebugInfo`

Some extra information useful only for debugging purposes.

## Implementations§

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### impl Node

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#### pub fn default_location_state(&self) -> LocationState

## Trait Implementations§

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### impl Clone for Node

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#### fn clone(&self) -> Node

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 Node

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl Freeze for Node

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### impl RefUnwindSafe for Node

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### impl Send for Node

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### impl Sync for Node

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### impl Unpin for Node

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### impl UnsafeUnpin for Node

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### impl UnwindSafe for Node

## 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<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<T> Same for T

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#### type Output = T

Should always be `Self`
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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.

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 136 bytes