Struct rustc_infer::infer::type_variable::TyVidEqKey
source · pub(crate) struct TyVidEqKey<'tcx> {
vid: TyVid,
phantom: PhantomData<TypeVariableValue<'tcx>>,
}
Expand description
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§
source§impl<'tcx> Clone for TyVidEqKey<'tcx>
impl<'tcx> Clone for TyVidEqKey<'tcx>
source§fn clone(&self) -> TyVidEqKey<'tcx>
fn clone(&self) -> TyVidEqKey<'tcx>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl<'tcx> Debug for TyVidEqKey<'tcx>
impl<'tcx> Debug for TyVidEqKey<'tcx>
source§impl<'tcx> From<TyVid> for TyVidEqKey<'tcx>
impl<'tcx> From<TyVid> for TyVidEqKey<'tcx>
source§impl<'tcx> PartialEq<TyVidEqKey<'tcx>> for TyVidEqKey<'tcx>
impl<'tcx> PartialEq<TyVidEqKey<'tcx>> for TyVidEqKey<'tcx>
source§fn eq(&self, other: &TyVidEqKey<'tcx>) -> bool
fn eq(&self, other: &TyVidEqKey<'tcx>) -> bool
source§impl<'tcx> UnifyKey for TyVidEqKey<'tcx>
impl<'tcx> UnifyKey for TyVidEqKey<'tcx>
type Value = TypeVariableValue<'tcx>
fn index(&self) -> u32
fn from_index(i: u32) -> Self
fn tag() -> &'static str
source§fn order_roots(
a: Self,
a_value: &Self::Value,
b: Self,
b_value: &Self::Value
) -> Option<(Self, Self)>
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. Read moreimpl<'tcx> Copy for TyVidEqKey<'tcx>
impl<'tcx> Eq for TyVidEqKey<'tcx>
impl<'tcx> StructuralEq for TyVidEqKey<'tcx>
impl<'tcx> StructuralPartialEq for TyVidEqKey<'tcx>
Auto Trait Implementations§
impl<'tcx> !RefUnwindSafe for TyVidEqKey<'tcx>
impl<'tcx> !Send for TyVidEqKey<'tcx>
impl<'tcx> !Sync for TyVidEqKey<'tcx>
impl<'tcx> Unpin for TyVidEqKey<'tcx>
impl<'tcx> !UnwindSafe for TyVidEqKey<'tcx>
Blanket Implementations§
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