Struct rustc_metadata::rmeta::decoder::CrateMetadata

pub(crate) struct CrateMetadata {

    blob: MetadataBlob,
    root: CrateRoot,
    trait_impls: FxHashMap<(u32, DefIndex), LazyArray<(DefIndex, Option<SimplifiedType>)>>,
    incoherent_impls: FxHashMap<SimplifiedType, LazyArray<DefIndex>>,
    raw_proc_macros: Option<&'static [ProcMacro]>,
    source_map_import_info: Lock<Vec<Option<ImportedSourceFile>>>,
    def_path_hash_map: DefPathHashMapRef<'static>,
    expn_hash_map: OnceLock<UnhashMap<ExpnHash, ExpnIndex>>,
    alloc_decoding_state: AllocDecodingState,
    def_key_cache: Lock<FxHashMap<DefIndex, DefKey>>,
    cnum: CrateNum,
    cnum_map: IndexVec<CrateNum, CrateNum>,
    dependencies: Vec<CrateNum>,
    dep_kind: CrateDepKind,
    source: Lrc<CrateSource>,
    private_dep: bool,
    host_hash: Option<Svh>,
    used: bool,
    hygiene_context: HygieneDecodeContext,
    extern_crate: Option<ExternCrate>,
}

Fields

blob: MetadataBlob

The primary crate data - binary metadata blob.

root: CrateRoot

Data about the top-level items in a crate, as well as various crate-level metadata.

trait_impls: FxHashMap<(u32, DefIndex), LazyArray<(DefIndex, Option<SimplifiedType>)>>

Trait impl data. FIXME: Used only from queries and can use query cache, so pre-decoding can probably be avoided.

incoherent_impls: FxHashMap<SimplifiedType, LazyArray<DefIndex>>

Inherent impls which do not follow the normal coherence rules.

These can be introduced using either #![rustc_coherence_is_core] or #[rustc_allow_incoherent_impl].

raw_proc_macros: Option<&'static [ProcMacro]>

Proc macro descriptions for this crate, if it’s a proc macro crate.

source_map_import_info: Lock<Vec<Option<ImportedSourceFile>>>

Source maps for code from the crate.

def_path_hash_map: DefPathHashMapRef<'static>

For every definition in this crate, maps its DefPathHash to its DefIndex.

expn_hash_map: OnceLock<UnhashMap<ExpnHash, ExpnIndex>>

Likewise for ExpnHash.

alloc_decoding_state: AllocDecodingState

Used for decoding interpret::AllocIds in a cached & thread-safe manner.

def_key_cache: Lock<FxHashMap<DefIndex, DefKey>>

Caches decoded DefKeys.

cnum: CrateNum

ID of this crate, from the current compilation session’s point of view.

cnum_map: IndexVec<CrateNum, CrateNum>

Maps crate IDs as they are were seen from this crate’s compilation sessions into IDs as they are seen from the current compilation session.

dependencies: Vec<CrateNum>

Same ID set as cnum_map plus maybe some injected crates like panic runtime.

dep_kind: CrateDepKind

How to link (or not link) this crate to the currently compiled crate.

source: Lrc<CrateSource>

Filesystem location of this crate.

private_dep: bool

Whether or not this crate should be consider a private dependency. Used by the ‘exported_private_dependencies’ lint, and for determining whether to emit suggestions that reference this crate.

host_hash: Option<Svh>

The hash for the host proc macro. Used to support -Z dual-proc-macro.

used: bool

The crate was used non-speculatively.

hygiene_context: HygieneDecodeContext

Additional data used for decoding HygieneData (e.g. SyntaxContext and ExpnId). Note that we store a HygieneDecodeContext for each CrateMetadata. This is because SyntaxContext ids are not globally unique, so we need to track which ids we’ve decoded on a per-crate basis.

extern_crate: Option<ExternCrate>

Information about the extern crate item or path that caused this crate to be loaded. If this is None, then the crate was injected (e.g., by the allocator).

Implementations

impl CrateMetadata

pub(crate) fn new( sess: &Session, cstore: &CStore, blob: MetadataBlob, root: CrateRoot, raw_proc_macros: Option<&'static [ProcMacro]>, cnum: CrateNum, cnum_map: IndexVec<CrateNum, CrateNum>, dep_kind: CrateDepKind, source: CrateSource, private_dep: bool, host_hash: Option<Svh> ) -> CrateMetadata

pub(crate) fn dependencies(&self) -> impl Iterator<Item = CrateNum> + '_

pub(crate) fn add_dependency(&mut self, cnum: CrateNum)

pub(crate) fn update_extern_crate( &mut self, new_extern_crate: ExternCrate ) -> bool

pub(crate) fn source(&self) -> &CrateSource

pub(crate) fn dep_kind(&self) -> CrateDepKind

pub(crate) fn set_dep_kind(&mut self, dep_kind: CrateDepKind)

pub(crate) fn update_and_private_dep(&mut self, private_dep: bool)

pub(crate) fn used(&self) -> bool

pub(crate) fn required_panic_strategy(&self) -> Option<PanicStrategy>

pub(crate) fn needs_panic_runtime(&self) -> bool

pub(crate) fn is_panic_runtime(&self) -> bool

pub(crate) fn is_profiler_runtime(&self) -> bool

pub(crate) fn needs_allocator(&self) -> bool

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

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

pub(crate) fn has_default_lib_allocator(&self) -> bool

pub(crate) fn is_proc_macro_crate(&self) -> bool

pub(crate) fn name(&self) -> Symbol

pub(crate) fn hash(&self) -> Svh

fn num_def_ids(&self) -> usize

fn local_def_id(&self, index: DefIndex) -> DefId

fn reverse_translate_def_id(&self, did: DefId) -> Option<DefId>

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: 2736 bytes