[−][src]Struct rustc::infer::opaque_types::OpaqueTypeDecl
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)
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instead?
Information about the opaque, abstract types whose values we
are inferring in this function (these are the impl Trait
that
appear in the return type).
Fields
substs: &'tcx Substs<'tcx>
🔬 This is a nightly-only experimental API. (rustc_private
)
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instead?
The substitutions that we apply to the abstract that that this
impl Trait
desugars to. e.g., if:
fn foo<'a, 'b, T>() -> impl Trait<'a>
winds up desugared to:
abstract type Foo<'x, T>: Trait<'x> fn foo<'a, 'b, T>() -> Foo<'a, T>
then substs
would be ['a, T]
.
concrete_ty: Ty<'tcx>
🔬 This is a nightly-only experimental API. (rustc_private
)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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The type variable that represents the value of the abstract type that we require. In other words, after we compile this function, we will be created a constraint like:
Foo<'a, T> = ?C
where ?C
is the value of this type variable. =) It may
naturally refer to the type and lifetime parameters in scope
in this function, though ultimately it should only reference
those that are arguments to Foo
in the constraint above. (In
other words, ?C
should not include 'b
, even though it's a
lifetime parameter on foo
.)
has_required_region_bounds: bool
🔬 This is a nightly-only experimental API. (rustc_private
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
instead?
True if the impl Trait
bounds include region bounds.
For example, this would be true for:
fn foo<'a, 'b, 'c>() -> impl Trait<'c> + 'a + 'b
but false for:
fn foo<'c>() -> impl Trait<'c>
unless Trait
was declared like:
trait Trait<'c>: 'c
in which case it would be true.
This is used during regionck to decide whether we need to
impose any additional constraints to ensure that region
variables in concrete_ty
wind up being constrained to
something from substs
(or, at minimum, things that outlive
the fn body). (Ultimately, writeback is responsible for this
check.)
Trait Implementations
impl<'tcx> Copy for OpaqueTypeDecl<'tcx>
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impl<'tcx> Copy for OpaqueTypeDecl<'tcx>
impl<'tcx> Clone for OpaqueTypeDecl<'tcx>
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impl<'tcx> Clone for OpaqueTypeDecl<'tcx>
fn clone(&self) -> OpaqueTypeDecl<'tcx>
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fn clone(&self) -> OpaqueTypeDecl<'tcx>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<'tcx> Debug for OpaqueTypeDecl<'tcx>
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impl<'tcx> Debug for OpaqueTypeDecl<'tcx>
Auto Trait Implementations
impl<'tcx> !Send for OpaqueTypeDecl<'tcx>
impl<'tcx> !Send for OpaqueTypeDecl<'tcx>
impl<'tcx> !Sync for OpaqueTypeDecl<'tcx>
impl<'tcx> !Sync for OpaqueTypeDecl<'tcx>
Blanket Implementations
impl<T> MaybeResult for T
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impl<T> MaybeResult for T
fn from_ok(T) -> T
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fn from_ok(T) -> T
🔬 This is a nightly-only experimental API. (rustc_private
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instead?
fn map_same<F>(Self, F) -> T where
F: FnOnce(T) -> T,
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fn map_same<F>(Self, F) -> T where
F: FnOnce(T) -> T,
🔬 This is a nightly-only experimental API. (rustc_private
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
instead?
impl<'a, T> Captures for T where
T: ?Sized,
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impl<'a, T> Captures for T where
T: ?Sized,
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T
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impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<E> SpecializationError for E
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impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
🔬 This is a nightly-only experimental API. (rustc_private
)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
instead?
Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S
is the encoder/decoder state type, T
is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more
impl<T> Erased for T
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impl<T> Erased for T
impl<T> Send for T where
T: ?Sized,
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impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T