Struct rustc_metadata::rmeta::CrateRoot
source · pub(crate) struct CrateRoot {Show 40 fields
name: Symbol,
triple: TargetTriple,
extra_filename: String,
hash: Svh,
stable_crate_id: StableCrateId,
required_panic_strategy: Option<PanicStrategy>,
panic_in_drop_strategy: PanicStrategy,
edition: Edition,
has_global_allocator: bool,
has_panic_handler: bool,
has_default_lib_allocator: bool,
crate_deps: LazyArray<CrateDep>,
dylib_dependency_formats: LazyArray<Option<LinkagePreference>>,
lib_features: LazyArray<(Symbol, Option<Symbol>)>,
stability_implications: LazyArray<(Symbol, Symbol)>,
lang_items: LazyArray<(DefIndex, usize)>,
lang_items_missing: LazyArray<LangItem>,
diagnostic_items: LazyArray<(Symbol, DefIndex)>,
native_libraries: LazyArray<NativeLib>,
foreign_modules: LazyArray<ForeignModule>,
traits: LazyArray<DefIndex>,
impls: LazyArray<TraitImpls>,
incoherent_impls: LazyArray<IncoherentImpls>,
interpret_alloc_index: LazyArray<u32>,
proc_macro_data: Option<ProcMacroData>,
tables: LazyTables,
debugger_visualizers: LazyArray<DebuggerVisualizerFile>,
exported_symbols: LazyArray<(ExportedSymbol<'static>, SymbolExportInfo)>,
syntax_contexts: LazyTable<u32, LazyValue<SyntaxContextData>>,
expn_data: LazyTable<ExpnIndex, LazyValue<ExpnData>>,
expn_hashes: LazyTable<ExpnIndex, LazyValue<ExpnHash>>,
def_path_hash_map: LazyValue<DefPathHashMapRef<'static>>,
source_map: LazyTable<u32, LazyValue<SourceFile>>,
compiler_builtins: bool,
needs_allocator: bool,
needs_panic_runtime: bool,
no_builtins: bool,
panic_runtime: bool,
profiler_runtime: bool,
symbol_mangling_version: SymbolManglingVersion,
}
Expand description
Serialized metadata for a crate.
When compiling a proc-macro crate, we encode many of
the LazyArray<T>
fields as Lazy::empty()
. This serves two purposes:
- We avoid performing unnecessary work. Proc-macro crates can only export proc-macros functions, which are compiled into a shared library. As a result, a large amount of the information we normally store (e.g. optimized MIR) is unneeded by downstream crates.
- We avoid serializing invalid
CrateNum
s. When we deserialize a proc-macro crate, we don’t load any of its dependencies (since we just need to invoke a native function from the shared library). This means that any foreignCrateNum
s that we serialize cannot be deserialized, since we will not know how to map them into the current compilation session. If we were to serialize a proc-macro crate like a normal crate, much of what we serialized would be unusable in addition to being unused.
Fields
name: Symbol
triple: TargetTriple
extra_filename: String
hash: Svh
stable_crate_id: StableCrateId
required_panic_strategy: Option<PanicStrategy>
panic_in_drop_strategy: PanicStrategy
edition: Edition
has_global_allocator: bool
has_panic_handler: bool
has_default_lib_allocator: bool
crate_deps: LazyArray<CrateDep>
dylib_dependency_formats: LazyArray<Option<LinkagePreference>>
lib_features: LazyArray<(Symbol, Option<Symbol>)>
stability_implications: LazyArray<(Symbol, Symbol)>
lang_items: LazyArray<(DefIndex, usize)>
lang_items_missing: LazyArray<LangItem>
diagnostic_items: LazyArray<(Symbol, DefIndex)>
native_libraries: LazyArray<NativeLib>
foreign_modules: LazyArray<ForeignModule>
traits: LazyArray<DefIndex>
impls: LazyArray<TraitImpls>
incoherent_impls: LazyArray<IncoherentImpls>
interpret_alloc_index: LazyArray<u32>
proc_macro_data: Option<ProcMacroData>
tables: LazyTables
debugger_visualizers: LazyArray<DebuggerVisualizerFile>
exported_symbols: LazyArray<(ExportedSymbol<'static>, SymbolExportInfo)>
syntax_contexts: LazyTable<u32, LazyValue<SyntaxContextData>>
expn_data: LazyTable<ExpnIndex, LazyValue<ExpnData>>
expn_hashes: LazyTable<ExpnIndex, LazyValue<ExpnHash>>
def_path_hash_map: LazyValue<DefPathHashMapRef<'static>>
source_map: LazyTable<u32, LazyValue<SourceFile>>
compiler_builtins: bool
needs_allocator: bool
needs_panic_runtime: bool
no_builtins: bool
panic_runtime: bool
profiler_runtime: bool
symbol_mangling_version: SymbolManglingVersion
Implementations
sourceimpl CrateRoot
impl CrateRoot
pub(crate) fn is_proc_macro_crate(&self) -> bool
pub(crate) fn name(&self) -> Symbol
pub(crate) fn hash(&self) -> Svh
pub(crate) fn stable_crate_id(&self) -> StableCrateId
pub(crate) fn triple(&self) -> &TargetTriple
pub(crate) fn decode_crate_deps<'a>(
&self,
metadata: &'a MetadataBlob
) -> impl ExactSizeIterator<Item = CrateDep> + Captures<'a>
Trait Implementations
sourceimpl<'tcx, '__a> Decodable<DecodeContext<'__a, 'tcx>> for CrateRoot
impl<'tcx, '__a> Decodable<DecodeContext<'__a, 'tcx>> for CrateRoot
fn decode(__decoder: &mut DecodeContext<'__a, 'tcx>) -> Self
sourceimpl<'tcx, '__a> Encodable<EncodeContext<'__a, 'tcx>> for CrateRoot
impl<'tcx, '__a> Encodable<EncodeContext<'__a, 'tcx>> for CrateRoot
fn encode(&self, __encoder: &mut EncodeContext<'__a, 'tcx>)
sourceimpl ParameterizedOverTcx for CrateRoot
impl ParameterizedOverTcx for CrateRoot
Auto Trait Implementations
impl RefUnwindSafe for CrateRoot
impl Send for CrateRoot
impl Sync for CrateRoot
impl Unpin for CrateRoot
impl UnwindSafe for CrateRoot
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
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: 1352 bytes