Enum rustc_data_structures::obligation_forest::NodeState[−][src]

enum NodeState {
    Pending,
    Success,
    Waiting,
    Done,
    Error,
}
Expand description

The state of one node in some tree within the forest. This represents the current state of processing for the obligation (of type O) associated with this node.

The non-Error state transitions are as follows.

(Pre-creation)
 |
 |     register_obligation_at() (called by process_obligations() and
 v                               from outside the crate)
Pending
 |
 |     process_obligations()
 v
Success
 |  ^
 |  |  mark_successes()
 |  v
 |  Waiting
 |
 |     process_cycles()
 v
Done
 |
 |     compress()
 v
(Removed)

The Error state can be introduced in several places, via error_at().

Outside of ObligationForest methods, nodes should be either Pending or Waiting.

Variants

Pending
Expand description

This obligation has not yet been selected successfully. Cannot have subobligations.

Success
Expand description

This obligation was selected successfully, but may or may not have subobligations.

Waiting
Expand description

This obligation was selected successfully, but it has a pending subobligation.

Done
Expand description

This obligation, along with its subobligations, are complete, and will be removed in the next collection.

Error
Expand description

This obligation was resolved to an error. It will be removed by the next compression step.

Trait Implementations

impl Clone for NodeState[src]

fn clone(&self) -> NodeState[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for NodeState[src]

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

Formats the value using the given formatter. Read more

impl PartialEq<NodeState> for NodeState[src]

fn eq(&self, other: &NodeState) -> bool[src]

This method tests for self and other values to be equal, and is used by ==. Read more

#[must_use]
fn ne(&self, other: &Rhs) -> bool1.0.0[src]

This method tests for !=.

impl Copy for NodeState[src]

impl Eq for NodeState[src]

impl StructuralEq for NodeState[src]

impl StructuralPartialEq for NodeState[src]

Auto Trait Implementations

impl RefUnwindSafe for NodeState

impl Send for NodeState

impl Sync for NodeState

impl Unpin for NodeState

impl UnwindSafe for NodeState

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

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

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.

impl<'a, T> Captures<'a> for T where
    T: ?Sized, [src]

impl<T> Erased for T[src]