Struct rustc_infer::infer::type_variable::TyVidEqKey

pub(crate) struct TyVidEqKey<'tcx> {
    vid: TyVid,
    phantom: PhantomData<TypeVariableValue<'tcx>>,
}

These structs (a newtyped TyVid) are used as the unification key for the eq_relations; they carry a TypeVariableValue along with them.

Fields

vid: TyVid

phantom: PhantomData<TypeVariableValue<'tcx>>

Trait Implementations

impl<'tcx> Clone for TyVidEqKey<'tcx>

fn clone(&self) -> TyVidEqKey<'tcx>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for TyVidEqKey<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> From<TyVid> for TyVidEqKey<'tcx>

fn from(vid: TyVid) -> Self

Converts to this type from the input type.

impl<'tcx> PartialEq<TyVidEqKey<'tcx>> for TyVidEqKey<'tcx>

fn eq(&self, other: &TyVidEqKey<'tcx>) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx> UnifyKey for TyVidEqKey<'tcx>

type Value = TypeVariableValue<'tcx>

fn index(&self) -> u32

fn from_index(i: u32) -> Self

fn tag() -> &'static str

fn order_roots(
    a: Self,
    a_value: &Self::Value,
    b: Self,
    b_value: &Self::Value
) -> Option<(Self, Self)>

If true, then self should be preferred as root to other. Note that we assume a consistent partial ordering, so returning true implies that other.prefer_as_root_to(self) would return false. If there is no ordering between two keys (i.e., a.prefer_as_root_to(b) and b.prefer_as_root_to(a) both return false) then the rank will be used to determine the root in an optimal way.

impl<'tcx> Copy for TyVidEqKey<'tcx>

impl<'tcx> Eq for TyVidEqKey<'tcx>

impl<'tcx> StructuralEq for TyVidEqKey<'tcx>

impl<'tcx> StructuralPartialEq for TyVidEqKey<'tcx>

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: 4 bytes