Struct rustc_trait_selection::infer::canonical::OriginalQueryValues

source ·

pub struct OriginalQueryValues<'tcx> {
    pub universe_map: SmallVec<[UniverseIndex; 4]>,
    pub var_values: SmallVec<[GenericArg<'tcx>; 8]>,
}

Expand description

When we canonicalize a value to form a query, we wind up replacing various parts of it with canonical variables. This struct stores those replaced bits to remember for when we process the query result.

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§universe_map: SmallVec<[UniverseIndex; 4]>

Map from the universes that appear in the query to the universes in the caller context. For all queries except evaluate_goal (used by Chalk), we only ever put ROOT values into the query, so this map is very simple.

§var_values: SmallVec<[GenericArg<'tcx>; 8]>

This is equivalent to CanonicalVarValues, but using a SmallVec yields a significant performance win.

Auto Trait Implementations§

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Struct rustc_trait_selection::infer::canonical::OriginalQueryValues

Fields§

Auto Trait Implementations§

impl<'tcx> !RefUnwindSafe for OriginalQueryValues<'tcx>

impl<'tcx> Send for OriginalQueryValues<'tcx>

impl<'tcx> Sync for OriginalQueryValues<'tcx>

impl<'tcx> Unpin for OriginalQueryValues<'tcx>

impl<'tcx> !UnwindSafe for OriginalQueryValues<'tcx>

Blanket Implementations§

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

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

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

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

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