rustc_data_structures::graph::scc

Enum NodeState

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enum NodeState<N, S, A> {
    NotVisited,
    BeingVisited {
        depth: usize,
        annotation: A,
    },
    InCycle {
        scc_index: S,
        annotation: A,
    },
    InCycleWith {
        parent: N,
    },
}

Variants§

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NotVisited

This node has not yet been visited as part of the DFS.

After SCC construction is complete, this state ought to be impossible.

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BeingVisited

This node is currently being walked as part of our DFS. It is on the stack at the depth depth and its current annotation is annotation.

After SCC construction is complete, this state ought to be impossible.

Fields

§depth: usize
§annotation: A
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InCycle

Indicates that this node is a member of the given cycle where the merged annotation is annotation. Note that an SCC can have several cycles, so its final annotation is the merged value of all its member annotations.

Fields

§scc_index: S
§annotation: A
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InCycleWith

Indicates that this node is a member of whatever cycle parent is a member of. This state is transient: whenever we see it, we try to overwrite it with the current state of parent (this is the “path compression” step of a union-find algorithm).

Fields

§parent: N

Trait Implementations§

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impl<N: Clone, S: Clone, A: Clone> Clone for NodeState<N, S, A>

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fn clone(&self) -> NodeState<N, S, A>

Returns a copy 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<N: Debug, S: Debug, A: Debug> Debug for NodeState<N, S, A>

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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<N: Copy, S: Copy, A: Copy> Copy for NodeState<N, S, A>

Auto Trait Implementations§

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impl<N, S, A> Freeze for NodeState<N, S, A>
where A: Freeze, S: Freeze, N: Freeze,

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impl<N, S, A> RefUnwindSafe for NodeState<N, S, A>
where A: RefUnwindSafe, S: RefUnwindSafe, N: RefUnwindSafe,

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impl<N, S, A> Send for NodeState<N, S, A>
where A: Send, S: Send, N: Send,

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impl<N, S, A> Sync for NodeState<N, S, A>
where A: Sync, S: Sync, N: Sync,

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impl<N, S, A> Unpin for NodeState<N, S, A>
where A: Unpin, S: Unpin, N: Unpin,

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impl<N, S, A> UnwindSafe for NodeState<N, S, A>
where A: UnwindSafe, S: UnwindSafe, N: UnwindSafe,

Blanket Implementations§

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impl<T> Aligned for T

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

Alignment of Self.
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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, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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> IntoEither for T

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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
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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
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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> WithSubscriber for T

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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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.