## Node

# Struct Node

Source

    struct Node<O> {
        obligation: O,
        state: Cell<NodeState>,
        dependents: Vec<usize>,
        has_parent: bool,
        obligation_tree_id: ObligationTreeId,
    }

## Fields§

§`obligation: O`§`state: Cell<NodeState>`§`dependents: Vec<usize>`

Obligations that depend on this obligation for their completion. They must all be in a non-pending state.

§`has_parent: bool`

If true, `dependents[0]` points to a “parent” node, which requires special treatment upon error but is otherwise treated the same. (It would be more idiomatic to store the parent node in a separate `Option<usize>` field, but that slows down the common case of iterating over the parent and other descendants together.)

§`obligation_tree_id: ObligationTreeId`

Identifier of the obligation tree to which this node belongs.

## Implementations§

Source§

### impl<O> Node<O>

Source

#### fn new( parent: Option<usize>, obligation: O, obligation_tree_id: ObligationTreeId, ) -> Node<O>

## Trait Implementations§

Source§

### impl<O: Debug> Debug for Node<O>

Source§

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

§

### impl<O> DynSend for Node<O>
where O: DynSend,

§

### impl<O> !DynSync for Node<O>

§

### impl<O> !Freeze for Node<O>

§

### impl<O> !RefUnwindSafe for Node<O>

§

### impl<O> Send for Node<O>
where O: Send,

§

### impl<O> !Sync for Node<O>

§

### impl<O> Unpin for Node<O>
where O: Unpin,

§

### impl<O> UnwindSafe for Node<O>
where O: UnwindSafe,

## Blanket Implementations§

Source§

### impl<T> Aligned for T

Source§

#### const ALIGN: Alignment = const ALIGN: Alignment = Alignment::of::<Self>();

Alignment of `Self`.
§

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

§

#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
§

### impl<T> Borrow<T> for T
where T: ?Sized,

§

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
§

### impl<T> BorrowMut<T> for T
where T: ?Sized,

§

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

Mutably borrows from an owned value. Read more
§

### impl<T> From<T> for T

§

#### fn from(t: T) -> T

Returns the argument unchanged.

§

### impl<T> Instrument for T

§

#### fn instrument(self, span: Span) -> Instrumented<Self>

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

#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
§

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

§

#### fn into(self) -> U

Calls `U::from(self)`.

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

§

### impl<T> IntoEither for T

§

#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
§

#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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
§

### impl<T> Pointable for T

§

#### const ALIGN: usize

The alignment of pointer.
§

#### type Init = T

The type for initializers.
§

#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
§

#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
§

#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
§

#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
§

### impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

#### type Error = Infallible

The type returned in the event of a conversion error.
§

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
§

### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
§

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
§

### impl<T> WithSubscriber for T

§

#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
§

#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more

## Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.