# Struct rustc_metadata::creader::CStore

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    pub struct CStore {
        metadata_loader: Box<MetadataLoaderDyn>,
        metas: IndexVec<CrateNum, Option<Box<CrateMetadata>>>,
        injected_panic_runtime: Option<CrateNum>,
        allocator_kind: Option<AllocatorKind>,
        alloc_error_handler_kind: Option<AllocatorKind>,
        has_global_allocator: bool,
        has_alloc_error_handler: bool,
        unused_externs: Vec<Symbol>,
    }

## Fields§

§`metadata_loader: Box<MetadataLoaderDyn>`§`metas: IndexVec<CrateNum, Option<Box<CrateMetadata>>>`§`injected_panic_runtime: Option<CrateNum>`§`allocator_kind: Option<AllocatorKind>`

This crate needs an allocator and either provides it itself, or finds it in a dependency. If the above is true, then this field denotes the kind of the found allocator.

§`alloc_error_handler_kind: Option<AllocatorKind>`

This crate needs an allocation error handler and either provides it itself, or finds it in a dependency. If the above is true, then this field denotes the kind of the found allocator.

§`has_global_allocator: bool`

This crate has a `#[global_allocator]` item.

§`has_alloc_error_handler: bool`

This crate has a `#[alloc_error_handler]` item.

§`unused_externs: Vec<Symbol>`

Unused externs of the crate

## Implementations§

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### impl CStore

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#### pub fn ctor_untracked(&self, def: DefId) -> Option<(CtorKind, DefId)>

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#### pub fn load_macro_untracked(&self, id: DefId, tcx: TyCtxt<'_>) -> LoadedMacro

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#### pub fn def_span_untracked(&self, def_id: DefId, sess: &Session) -> Span

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#### pub fn def_kind_untracked(&self, def: DefId) -> DefKind

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#### pub fn expn_that_defined_untracked( &self, def_id: DefId, sess: &Session ) -> ExpnId

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#### pub fn num_def_ids_untracked(&self, cnum: CrateNum) -> usize

Only public-facing way to traverse all the definitions in a non-local crate. Critically useful for this third-party project: https://github.com/hacspec/hacspec. See https://github.com/rust-lang/rust/pull/85889 for context.

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#### pub fn get_proc_macro_quoted_span_untracked( &self, cnum: CrateNum, id: usize, sess: &Session ) -> Span

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#### pub fn set_used_recursively(&mut self, cnum: CrateNum)

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#### pub(crate) fn update_extern_crate( &mut self, cnum: CrateNum, extern_crate: ExternCrate )

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### impl CStore

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#### pub fn from_tcx(tcx: TyCtxt<'_>) -> FreezeReadGuard<'_, CStore>

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#### pub fn from_tcx_mut(tcx: TyCtxt<'_>) -> FreezeWriteGuard<'_, CStore>

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#### fn intern_stable_crate_id<'tcx>( &mut self, root: &CrateRoot, tcx: TyCtxt<'tcx> ) -> Result<TyCtxtFeed<'tcx, CrateNum>, CrateError>

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#### pub fn has_crate_data(&self, cnum: CrateNum) -> bool

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#### pub(crate) fn get_crate_data(&self, cnum: CrateNum) -> CrateMetadataRef<'_>

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#### pub(crate) fn get_crate_data_mut( &mut self, cnum: CrateNum ) -> &mut CrateMetadata

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#### fn set_crate_data(&mut self, cnum: CrateNum, data: CrateMetadata)

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#### pub(crate) fn iter_crate_data( &self ) -> impl Iterator<Item = (CrateNum, &CrateMetadata)>

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#### fn iter_crate_data_mut( &mut self ) -> impl Iterator<Item = (CrateNum, &mut CrateMetadata)>

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#### fn push_dependencies_in_postorder( &self, deps: &mut Vec<CrateNum>, cnum: CrateNum )

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#### pub(crate) fn crate_dependencies_in_postorder( &self, cnum: CrateNum ) -> Vec<CrateNum>

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#### fn crate_dependencies_in_reverse_postorder( &self, cnum: CrateNum ) -> Vec<CrateNum>

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#### pub(crate) fn injected_panic_runtime(&self) -> Option<CrateNum>

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#### pub(crate) fn allocator_kind(&self) -> Option<AllocatorKind>

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#### pub(crate) fn alloc_error_handler_kind(&self) -> Option<AllocatorKind>

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#### pub(crate) fn has_global_allocator(&self) -> bool

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#### pub(crate) fn has_alloc_error_handler(&self) -> bool

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#### pub fn report_unused_deps(&self, tcx: TyCtxt<'_>)

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#### pub fn new(metadata_loader: Box<MetadataLoaderDyn>) -> CStore

## Trait Implementations§

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### impl CrateStore for CStore

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#### fn def_key(&self, def: DefId) -> DefKey

Returns the `DefKey` for a given `DefId`. This indicates the parent `DefId` as well as some idea of what kind of data the `DefId` refers to.

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#### fn as_any(&self) -> &dyn Any

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#### fn untracked_as_any(&mut self) -> &mut dyn Any

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#### fn crate_name(&self, cnum: CrateNum) -> Symbol

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#### fn stable_crate_id(&self, cnum: CrateNum) -> StableCrateId

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#### fn def_path(&self, def: DefId) -> DefPath

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#### fn def_path_hash(&self, def: DefId) -> DefPathHash

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### impl Debug for CStore

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl DynSend for CStore

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### impl DynSync for CStore

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### impl Freeze for CStore

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### impl !RefUnwindSafe for CStore

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### impl !Send for CStore

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### impl !Sync for CStore

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### impl Unpin for CStore

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### impl !UnwindSafe for CStore

## 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>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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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<P> IntoQueryParam<P> for P

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#### fn into_query_param(self) -> 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> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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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<'tcx, T> ToPredicate<'tcx, T> for T

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#### fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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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

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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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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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<'a, T> Captures<'a> for T
where T: ?Sized,

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### impl<T> ErasedDestructor for T
where T: 'static,

## 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: 72 bytes