pub enum TaskDepsRef<'a> {
    Allow(&'a Lock<TaskDeps>),
    EvalAlways,
    Ignore,
    Forbid,
}

Variants§

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Allow(&'a Lock<TaskDeps>)

New dependencies can be added to the TaskDeps. This is used when executing a ‘normal’ query (no eval_always modifier)

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EvalAlways

This is used when executing an eval_always query. We don’t need to track dependencies for a query that’s always re-executed – but we need to know that this is an eval_always query in order to emit dependencies to DepNodeIndex::FOREVER_RED_NODE when directly feeding other queries.

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Ignore

New dependencies are ignored. This is also used for dep_graph.with_ignore.

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Forbid

Any attempt to add new dependencies will cause a panic. This is used when decoding a query result from disk, to ensure that the decoding process doesn’t itself require the execution of any queries.

Trait Implementations§

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impl<'a> Clone for TaskDepsRef<'a>

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fn clone(&self) -> TaskDepsRef<'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<'a> Debug for TaskDepsRef<'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<'a> Copy for TaskDepsRef<'a>

Auto Trait Implementations§

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impl<'a> !RefUnwindSafe for TaskDepsRef<'a>

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impl<'a> !Send for TaskDepsRef<'a>

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impl<'a> !Sync for TaskDepsRef<'a>

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impl<'a> Unpin for TaskDepsRef<'a>

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impl<'a> !UnwindSafe for TaskDepsRef<'a>

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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> 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 Twhere 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> ToOwned for Twhere 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 Twhere 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 Twhere 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<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> T

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: 16 bytes

Size for each variant:

  • Allow: 8 bytes
  • EvalAlways: 0 bytes
  • Ignore: 0 bytes
  • Forbid: 0 bytes