Struct rustc_passes::reachable::ReachableContext

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struct ReachableContext<'tcx> {
    tcx: TyCtxt<'tcx>,
    maybe_typeck_results: Option<&'tcx TypeckResults<'tcx>>,
    reachable_symbols: LocalDefIdSet,
    worklist: Vec<LocalDefId>,
    any_library: bool,
}

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§tcx: TyCtxt<'tcx>§maybe_typeck_results: Option<&'tcx TypeckResults<'tcx>>§reachable_symbols: LocalDefIdSet§worklist: Vec<LocalDefId>§any_library: bool

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impl<'tcx> ReachableContext<'tcx>

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fn typeck_results(&self) -> &'tcx TypeckResults<'tcx>

Gets the type-checking results for the current body. As this will ICE if called outside bodies, only call when working with Expr or Pat nodes (they are guaranteed to be found only in bodies).

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fn is_recursively_reachable_local(&self, def_id: DefId) -> bool

Returns true if the given def ID represents a local item that is recursive for reachability, i.e. whether everything mentioned in here also needs to be considered reachable.

There are two reasons why an item may be recursively reachable:

  • It needs cross-crate MIR (see the module-level doc comment above).
  • It is a const or const fn. This is not because we need the MIR to interpret them (MIR for const-eval and MIR for codegen is separate, and MIR for const-eval is always encoded). Instead, it is because const fn can create fn() pointers to other items which end up in the evaluated result of the constant and can then be called from other crates. Those items must be considered reachable.
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fn propagate(&mut self)

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fn propagate_node(&mut self, node: &Node<'tcx>, search_item: LocalDefId)

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fn propagate_from_alloc(&mut self, alloc: ConstAllocation<'tcx>)

Finds things to add to reachable_symbols within allocations. In contrast to visit_nested_body this ignores things that were only needed to evaluate the allocation.

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fn propagate_item(&mut self, res: Res)

Trait Implementations§

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impl<'tcx> DefIdVisitor<'tcx> for ReachableContext<'tcx>

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type Result = ()

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fn tcx(&self) -> TyCtxt<'tcx>

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fn visit_def_id( &mut self, def_id: DefId, _kind: &str, _descr: &dyn Display, ) -> Self::Result

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const SHALLOW: bool = false

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const SKIP_ASSOC_TYS: bool = false

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fn skeleton(&mut self) -> DefIdVisitorSkeleton<'_, 'tcx, Self>

Not overridden, but used to actually visit types and traits.
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fn visit( &mut self, ty_fragment: impl TypeVisitable<TyCtxt<'tcx>>, ) -> Self::Result

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fn visit_trait(&mut self, trait_ref: TraitRef<TyCtxt<'tcx>>) -> Self::Result

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fn visit_predicates( &mut self, predicates: GenericPredicates<'tcx>, ) -> Self::Result

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fn visit_clauses(&mut self, clauses: &[(Clause<'tcx>, Span)]) -> Self::Result

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impl<'tcx> Visitor<'tcx> for ReachableContext<'tcx>

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fn visit_nested_body(&mut self, body: BodyId)

Invoked to visit the body of a function, method or closure. Like visit_nested_item, does nothing by default unless you override Self::NestedFilter.
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fn visit_expr(&mut self, expr: &'tcx Expr<'tcx>)

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fn visit_inline_asm(&mut self, asm: &'tcx InlineAsm<'tcx>, id: HirId)

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type Map = <Self::NestedFilter as NestedFilter<'v>>::Map

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type NestedFilter = None

Override this type to control which nested HIR are visited; see NestedFilter for details. If you override this type, you must also override nested_visit_map. Read more
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type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.
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fn nested_visit_map(&mut self) -> Self::Map

If type NestedFilter is set to visit nested items, this method must also be overridden to provide a map to retrieve nested items.
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fn visit_nested_item(&mut self, id: ItemId) -> Self::Result

Invoked when a nested item is encountered. By default, when Self::NestedFilter is nested_filter::None, this method does nothing. You probably don’t want to override this method – instead, override Self::NestedFilter or use the “shallow” or “deep” visit patterns described at rustc_hir::intravisit. The only reason to override this method is if you want a nested pattern but cannot supply a Map; see nested_visit_map for advice.
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fn visit_nested_trait_item(&mut self, id: TraitItemId) -> Self::Result

Like visit_nested_item(), but for trait items. See visit_nested_item() for advice on when to override this method.
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fn visit_nested_impl_item(&mut self, id: ImplItemId) -> Self::Result

Like visit_nested_item(), but for impl items. See visit_nested_item() for advice on when to override this method.
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fn visit_nested_foreign_item(&mut self, id: ForeignItemId) -> Self::Result

Like visit_nested_item(), but for foreign items. See visit_nested_item() for advice on when to override this method.
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fn visit_param(&mut self, param: &'v Param<'v>) -> Self::Result

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fn visit_item(&mut self, i: &'v Item<'v>) -> Self::Result

Visits the top-level item and (optionally) nested items / impl items. See visit_nested_item for details.
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fn visit_body(&mut self, b: &Body<'v>) -> Self::Result

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fn visit_id(&mut self, _hir_id: HirId) -> Self::Result

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fn visit_name(&mut self, _name: Symbol) -> Self::Result

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fn visit_ident(&mut self, ident: Ident) -> Self::Result

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fn visit_mod(&mut self, m: &'v Mod<'v>, _s: Span, n: HirId) -> Self::Result

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fn visit_foreign_item(&mut self, i: &'v ForeignItem<'v>) -> Self::Result

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fn visit_local(&mut self, l: &'v LetStmt<'v>) -> Self::Result

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fn visit_block(&mut self, b: &'v Block<'v>) -> Self::Result

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fn visit_stmt(&mut self, s: &'v Stmt<'v>) -> Self::Result

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fn visit_arm(&mut self, a: &'v Arm<'v>) -> Self::Result

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fn visit_pat(&mut self, p: &'v Pat<'v>) -> Self::Result

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fn visit_pat_field(&mut self, f: &'v PatField<'v>) -> Self::Result

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fn visit_array_length(&mut self, len: &'v ArrayLen<'v>) -> Self::Result

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fn visit_anon_const(&mut self, c: &'v AnonConst) -> Self::Result

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fn visit_inline_const(&mut self, c: &'v ConstBlock) -> Self::Result

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fn visit_const_arg(&mut self, c: &'v ConstArg<'v>) -> Self::Result

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fn visit_expr_field(&mut self, field: &'v ExprField<'v>) -> Self::Result

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fn visit_ty(&mut self, t: &'v Ty<'v>) -> Self::Result

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fn visit_pattern_type_pattern(&mut self, _p: &'v Pat<'v>)

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fn visit_generic_param(&mut self, p: &'v GenericParam<'v>) -> Self::Result

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fn visit_const_param_default( &mut self, _param: HirId, ct: &'v ConstArg<'v>, ) -> Self::Result

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fn visit_generics(&mut self, g: &'v Generics<'v>) -> Self::Result

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fn visit_where_predicate( &mut self, predicate: &'v WherePredicate<'v>, ) -> Self::Result

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fn visit_fn_ret_ty(&mut self, ret_ty: &'v FnRetTy<'v>) -> Self::Result

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fn visit_fn_decl(&mut self, fd: &'v FnDecl<'v>) -> Self::Result

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fn visit_fn( &mut self, fk: FnKind<'v>, fd: &'v FnDecl<'v>, b: BodyId, _: Span, id: LocalDefId, ) -> Self::Result

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fn visit_use( &mut self, path: &'v Path<'v, SmallVec<[Res; 3]>>, hir_id: HirId, ) -> Self::Result

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fn visit_trait_item(&mut self, ti: &'v TraitItem<'v>) -> Self::Result

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fn visit_trait_item_ref(&mut self, ii: &'v TraitItemRef) -> Self::Result

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fn visit_impl_item(&mut self, ii: &'v ImplItem<'v>) -> Self::Result

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fn visit_foreign_item_ref(&mut self, ii: &'v ForeignItemRef) -> Self::Result

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fn visit_impl_item_ref(&mut self, ii: &'v ImplItemRef) -> Self::Result

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fn visit_trait_ref(&mut self, t: &'v TraitRef<'v>) -> Self::Result

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fn visit_param_bound(&mut self, bounds: &'v GenericBound<'v>) -> Self::Result

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fn visit_precise_capturing_arg( &mut self, arg: &'v PreciseCapturingArg<'v>, ) -> Self::Result

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fn visit_poly_trait_ref(&mut self, t: &'v PolyTraitRef<'v>) -> Self::Result

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fn visit_variant_data(&mut self, s: &'v VariantData<'v>) -> Self::Result

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fn visit_field_def(&mut self, s: &'v FieldDef<'v>) -> Self::Result

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fn visit_enum_def( &mut self, enum_definition: &'v EnumDef<'v>, item_id: HirId, ) -> Self::Result

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fn visit_variant(&mut self, v: &'v Variant<'v>) -> Self::Result

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fn visit_label(&mut self, label: &'v Label) -> Self::Result

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fn visit_infer(&mut self, inf: &'v InferArg) -> Self::Result

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fn visit_generic_arg(&mut self, generic_arg: &'v GenericArg<'v>) -> Self::Result

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fn visit_lifetime(&mut self, lifetime: &'v Lifetime) -> Self::Result

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fn visit_qpath( &mut self, qpath: &'v QPath<'v>, id: HirId, _span: Span, ) -> Self::Result

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fn visit_path(&mut self, path: &Path<'v>, _id: HirId) -> Self::Result

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fn visit_path_segment( &mut self, path_segment: &'v PathSegment<'v>, ) -> Self::Result

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fn visit_generic_args( &mut self, generic_args: &'v GenericArgs<'v>, ) -> Self::Result

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fn visit_assoc_item_constraint( &mut self, constraint: &'v AssocItemConstraint<'v>, ) -> Self::Result

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fn visit_attribute(&mut self, _attr: &'v Attribute) -> Self::Result

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fn visit_associated_item_kind( &mut self, kind: &'v AssocItemKind, ) -> Self::Result

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fn visit_defaultness(&mut self, defaultness: &'v Defaultness) -> Self::Result

Auto Trait Implementations§

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impl<'tcx> Freeze for ReachableContext<'tcx>

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

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impl<'tcx> !Send for ReachableContext<'tcx>

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impl<'tcx> !Sync for ReachableContext<'tcx>

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impl<'tcx> Unpin for ReachableContext<'tcx>

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

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> Filterable for T

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

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

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts 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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts 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 more
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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

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

Performs the conversion.
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where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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impl<I, T> UpcastFrom<I, T> for T

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fn upcast_from(from: T, _tcx: I) -> T

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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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: 80 bytes