pub enum InferTy {
TyVar(TyVid),
IntVar(IntVid),
FloatVar(FloatVid),
FreshTy(u32),
FreshIntTy(u32),
FreshFloatTy(u32),
}
Expand description
A placeholder for a type that hasn’t been inferred yet.
E.g., if we have an empty array ([]
), then we create a fresh
type variable for the element type since we won’t know until it’s
used what the element type is supposed to be.
Variants§
TyVar(TyVid)
A type variable.
IntVar(IntVid)
An integral type variable ({integer}
).
These are created when the compiler sees an integer literal like
1
that could be several different types (u8
, i32
, u32
, etc.).
We don’t know until it’s used what type it’s supposed to be, so
we create a fresh type variable.
FloatVar(FloatVid)
A floating-point type variable ({float}
).
These are created when the compiler sees an float literal like
1.0
that could be either an f32
or an f64
.
We don’t know until it’s used what type it’s supposed to be, so
we create a fresh type variable.
FreshTy(u32)
A FreshTy
is one that is generated as a replacement
for an unbound type variable. This is convenient for caching etc. See
rustc_infer::infer::freshen
for more details.
Compare with TyVar
.
FreshIntTy(u32)
FreshFloatTy(u32)
Trait Implementations§
Source§impl<__D> Decodable<__D> for InferTywhere
__D: SpanDecoder,
impl<__D> Decodable<__D> for InferTywhere
__D: SpanDecoder,
Source§impl<__E> Encodable<__E> for InferTywhere
__E: SpanEncoder,
impl<__E> Encodable<__E> for InferTywhere
__E: SpanEncoder,
Source§impl<CTX> HashStable<CTX> for InferTy
impl<CTX> HashStable<CTX> for InferTy
fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher<SipHasher128>)
Source§impl Ord for InferTy
impl Ord for InferTy
Source§impl PartialOrd for InferTy
impl PartialOrd for InferTy
impl Copy for InferTy
impl Eq for InferTy
impl StructuralPartialEq for InferTy
Auto Trait Implementations§
impl DynSend for InferTy
impl DynSync for InferTy
impl Freeze for InferTy
impl RefUnwindSafe for InferTy
impl Send for InferTy
impl Sync for InferTy
impl Unpin for InferTy
impl UnwindSafe for InferTy
Blanket Implementations§
Source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]
Source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
Source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
Source§impl<Tcx, T> DepNodeParams<Tcx> for T
impl<Tcx, T> DepNodeParams<Tcx> for T
default fn fingerprint_style() -> FingerprintStyle
Source§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_debug_str(&self, _: Tcx) -> String
Source§default fn recover(_: Tcx, _: &DepNode) -> Option<T>
default fn recover(_: Tcx, _: &DepNode) -> Option<T>
DepNode
,
something which is needed when forcing DepNode
s during red-green
evaluation. The query system will only call this method if
fingerprint_style()
is not FingerprintStyle::Opaque
.
It is always valid to return None
here, in which case incremental
compilation will treat the query as having changed instead of forcing it.Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.Source§impl<T> Filterable for T
impl<T> Filterable for T
Source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
Source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
Source§impl<T> Pointable for T
impl<T> Pointable for T
Source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
Source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
Source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
Source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
Source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
Source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for 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: 8 bytes
Size for each variant:
TyVar
: 4 bytesIntVar
: 4 bytesFloatVar
: 4 bytesFreshTy
: 4 bytesFreshIntTy
: 4 bytesFreshFloatTy
: 4 bytes