535 lines
20 KiB
Rust
535 lines
20 KiB
Rust
use crate::creader::{CStore, LoadedMacro};
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use crate::foreign_modules;
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use crate::link_args;
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use crate::native_libs;
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use crate::rmeta::{self, encoder};
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use rustc_ast as ast;
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use rustc_ast::expand::allocator::AllocatorKind;
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use rustc_data_structures::stable_map::FxHashMap;
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use rustc_data_structures::svh::Svh;
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use rustc_hir as hir;
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use rustc_hir::def::DefKind;
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use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, CRATE_DEF_INDEX, LOCAL_CRATE};
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use rustc_hir::definitions::{DefKey, DefPath, DefPathHash};
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use rustc_middle::hir::exports::Export;
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use rustc_middle::middle::cstore::ForeignModule;
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use rustc_middle::middle::cstore::{CrateSource, CrateStore, EncodedMetadata};
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use rustc_middle::middle::exported_symbols::ExportedSymbol;
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use rustc_middle::middle::stability::DeprecationEntry;
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use rustc_middle::ty::query::Providers;
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use rustc_middle::ty::{self, TyCtxt};
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use rustc_session::utils::NativeLibKind;
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use rustc_session::{CrateDisambiguator, Session};
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use rustc_span::source_map::{Span, Spanned};
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use rustc_span::symbol::Symbol;
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use rustc_data_structures::sync::Lrc;
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use rustc_span::ExpnId;
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use smallvec::SmallVec;
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use std::any::Any;
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macro_rules! provide {
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(<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
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$($name:ident => $compute:block)*) => {
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pub fn provide_extern(providers: &mut Providers) {
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$(fn $name<$lt>(
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$tcx: TyCtxt<$lt>,
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def_id_arg: ty::query::query_keys::$name<$lt>,
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) -> ty::query::query_values::$name<$lt> {
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let _prof_timer =
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$tcx.prof.generic_activity(concat!("metadata_decode_entry_", stringify!($name)));
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#[allow(unused_variables)]
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let ($def_id, $other) = def_id_arg.into_args();
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assert!(!$def_id.is_local());
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// External query providers call `crate_hash` in order to register a dependency
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// on the crate metadata. The exception is `crate_hash` itself, which obviously
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// doesn't need to do this (and can't, as it would cause a query cycle).
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use rustc_middle::dep_graph::DepKind;
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if DepKind::$name != DepKind::crate_hash && $tcx.dep_graph.is_fully_enabled() {
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$tcx.ensure().crate_hash($def_id.krate);
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}
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let $cdata = CStore::from_tcx($tcx).get_crate_data($def_id.krate);
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$compute
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})*
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*providers = Providers {
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$($name,)*
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..*providers
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};
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}
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}
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}
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// small trait to work around different signature queries all being defined via
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// the macro above.
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trait IntoArgs {
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fn into_args(self) -> (DefId, DefId);
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}
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impl IntoArgs for DefId {
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fn into_args(self) -> (DefId, DefId) {
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(self, self)
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}
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}
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impl IntoArgs for CrateNum {
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fn into_args(self) -> (DefId, DefId) {
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(self.as_def_id(), self.as_def_id())
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}
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}
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impl IntoArgs for (CrateNum, DefId) {
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fn into_args(self) -> (DefId, DefId) {
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(self.0.as_def_id(), self.1)
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}
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}
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provide! { <'tcx> tcx, def_id, other, cdata,
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type_of => { cdata.get_type(def_id.index, tcx) }
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generics_of => { cdata.get_generics(def_id.index, tcx.sess) }
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explicit_predicates_of => { cdata.get_explicit_predicates(def_id.index, tcx) }
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inferred_outlives_of => { cdata.get_inferred_outlives(def_id.index, tcx) }
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super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
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explicit_item_bounds => { cdata.get_explicit_item_bounds(def_id.index, tcx) }
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trait_def => { cdata.get_trait_def(def_id.index, tcx.sess) }
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adt_def => { cdata.get_adt_def(def_id.index, tcx) }
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adt_destructor => {
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let _ = cdata;
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tcx.calculate_dtor(def_id, |_,_| Ok(()))
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}
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variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
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associated_item_def_ids => {
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let mut result = SmallVec::<[_; 8]>::new();
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cdata.each_child_of_item(def_id.index,
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|child| result.push(child.res.def_id()), tcx.sess);
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tcx.arena.alloc_slice(&result)
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}
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associated_item => { cdata.get_associated_item(def_id.index, tcx.sess) }
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impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
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impl_polarity => { cdata.get_impl_polarity(def_id.index) }
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coerce_unsized_info => {
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cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
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bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
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})
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}
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optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) }
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promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) }
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mir_abstract_const => { cdata.get_mir_abstract_const(tcx, def_id.index) }
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unused_generic_params => { cdata.get_unused_generic_params(def_id.index) }
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mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
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fn_sig => { cdata.fn_sig(def_id.index, tcx) }
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inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
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is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
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asyncness => { cdata.asyncness(def_id.index) }
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is_foreign_item => { cdata.is_foreign_item(def_id.index) }
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static_mutability => { cdata.static_mutability(def_id.index) }
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generator_kind => { cdata.generator_kind(def_id.index) }
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def_kind => { cdata.def_kind(def_id.index) }
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def_span => { cdata.get_span(def_id.index, &tcx.sess) }
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lookup_stability => {
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cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
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}
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lookup_const_stability => {
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cdata.get_const_stability(def_id.index).map(|s| tcx.intern_const_stability(s))
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}
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lookup_deprecation_entry => {
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cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
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}
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item_attrs => { tcx.arena.alloc_from_iter(
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cdata.get_item_attrs(def_id.index, tcx.sess)
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) }
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fn_arg_names => { cdata.get_fn_param_names(tcx, def_id.index) }
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rendered_const => { cdata.get_rendered_const(def_id.index) }
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impl_parent => { cdata.get_parent_impl(def_id.index) }
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trait_of_item => { cdata.get_trait_of_item(def_id.index) }
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is_mir_available => { cdata.is_item_mir_available(def_id.index) }
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dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }
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is_panic_runtime => { cdata.root.panic_runtime }
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is_compiler_builtins => { cdata.root.compiler_builtins }
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has_global_allocator => { cdata.root.has_global_allocator }
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has_panic_handler => { cdata.root.has_panic_handler }
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is_profiler_runtime => { cdata.root.profiler_runtime }
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panic_strategy => { cdata.root.panic_strategy }
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extern_crate => {
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let r = *cdata.extern_crate.lock();
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r.map(|c| &*tcx.arena.alloc(c))
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}
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is_no_builtins => { cdata.root.no_builtins }
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symbol_mangling_version => { cdata.root.symbol_mangling_version }
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impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
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reachable_non_generics => {
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let reachable_non_generics = tcx
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.exported_symbols(cdata.cnum)
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.iter()
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.filter_map(|&(exported_symbol, export_level)| {
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if let ExportedSymbol::NonGeneric(def_id) = exported_symbol {
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Some((def_id, export_level))
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} else {
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None
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}
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})
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.collect();
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reachable_non_generics
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}
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native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) }
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foreign_modules => { cdata.get_foreign_modules(tcx) }
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plugin_registrar_fn => {
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cdata.root.plugin_registrar_fn.map(|index| {
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DefId { krate: def_id.krate, index }
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})
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}
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proc_macro_decls_static => {
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cdata.root.proc_macro_data.as_ref().map(|data| {
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DefId {
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krate: def_id.krate,
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index: data.proc_macro_decls_static,
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}
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})
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}
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crate_disambiguator => { cdata.root.disambiguator }
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crate_hash => { cdata.root.hash }
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crate_host_hash => { cdata.host_hash }
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original_crate_name => { cdata.root.name }
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extra_filename => { cdata.root.extra_filename.clone() }
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implementations_of_trait => {
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cdata.get_implementations_for_trait(tcx, Some(other))
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}
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all_trait_implementations => {
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cdata.get_implementations_for_trait(tcx, None)
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}
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visibility => { cdata.get_visibility(def_id.index) }
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dep_kind => {
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let r = *cdata.dep_kind.lock();
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r
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}
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crate_name => { cdata.root.name }
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item_children => {
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let mut result = SmallVec::<[_; 8]>::new();
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cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
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tcx.arena.alloc_slice(&result)
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}
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defined_lib_features => { cdata.get_lib_features(tcx) }
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defined_lang_items => { cdata.get_lang_items(tcx) }
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diagnostic_items => { cdata.get_diagnostic_items() }
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missing_lang_items => { cdata.get_missing_lang_items(tcx) }
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missing_extern_crate_item => {
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let r = matches!(*cdata.extern_crate.borrow(), Some(extern_crate) if !extern_crate.is_direct());
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r
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}
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used_crate_source => { Lrc::new(cdata.source.clone()) }
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exported_symbols => {
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let syms = cdata.exported_symbols(tcx);
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// FIXME rust-lang/rust#64319, rust-lang/rust#64872: We want
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// to block export of generics from dylibs, but we must fix
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// rust-lang/rust#65890 before we can do that robustly.
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syms
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}
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crate_extern_paths => { cdata.source().paths().cloned().collect() }
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expn_that_defined => { cdata.get_expn_that_defined(def_id.index, tcx.sess) }
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}
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pub fn provide(providers: &mut Providers) {
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// FIXME(#44234) - almost all of these queries have no sub-queries and
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// therefore no actual inputs, they're just reading tables calculated in
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// resolve! Does this work? Unsure! That's what the issue is about
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*providers = Providers {
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is_dllimport_foreign_item: |tcx, id| match tcx.native_library_kind(id) {
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Some(NativeLibKind::Dylib | NativeLibKind::RawDylib | NativeLibKind::Unspecified) => {
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true
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}
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_ => false,
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},
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is_statically_included_foreign_item: |tcx, id| {
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matches!(
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tcx.native_library_kind(id),
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Some(NativeLibKind::StaticBundle | NativeLibKind::StaticNoBundle)
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)
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},
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native_library_kind: |tcx, id| {
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tcx.native_libraries(id.krate)
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.iter()
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.filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
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.find(|lib| {
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let fm_id = match lib.foreign_module {
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Some(id) => id,
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None => return false,
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};
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let map = tcx.foreign_modules(id.krate);
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map.get(&fm_id)
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.expect("failed to find foreign module")
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.foreign_items
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.contains(&id)
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})
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.map(|l| l.kind)
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},
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native_libraries: |tcx, cnum| {
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assert_eq!(cnum, LOCAL_CRATE);
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Lrc::new(native_libs::collect(tcx))
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},
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foreign_modules: |tcx, cnum| {
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assert_eq!(cnum, LOCAL_CRATE);
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let modules: FxHashMap<DefId, ForeignModule> =
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foreign_modules::collect(tcx).into_iter().map(|m| (m.def_id, m)).collect();
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Lrc::new(modules)
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},
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link_args: |tcx, cnum| {
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assert_eq!(cnum, LOCAL_CRATE);
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Lrc::new(link_args::collect(tcx))
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},
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// Returns a map from a sufficiently visible external item (i.e., an
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// external item that is visible from at least one local module) to a
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// sufficiently visible parent (considering modules that re-export the
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// external item to be parents).
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visible_parent_map: |tcx, cnum| {
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use std::collections::hash_map::Entry;
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use std::collections::vec_deque::VecDeque;
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assert_eq!(cnum, LOCAL_CRATE);
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let mut visible_parent_map: DefIdMap<DefId> = Default::default();
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// Issue 46112: We want the map to prefer the shortest
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// paths when reporting the path to an item. Therefore we
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// build up the map via a breadth-first search (BFS),
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// which naturally yields minimal-length paths.
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//
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// Note that it needs to be a BFS over the whole forest of
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// crates, not just each individual crate; otherwise you
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// only get paths that are locally minimal with respect to
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// whatever crate we happened to encounter first in this
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// traversal, but not globally minimal across all crates.
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let bfs_queue = &mut VecDeque::new();
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// Preferring shortest paths alone does not guarantee a
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// deterministic result; so sort by crate num to avoid
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// hashtable iteration non-determinism. This only makes
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// things as deterministic as crate-nums assignment is,
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// which is to say, its not deterministic in general. But
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// we believe that libstd is consistently assigned crate
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// num 1, so it should be enough to resolve #46112.
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let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
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crates.sort();
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for &cnum in crates.iter() {
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// Ignore crates without a corresponding local `extern crate` item.
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if tcx.missing_extern_crate_item(cnum) {
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continue;
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}
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bfs_queue.push_back(DefId { krate: cnum, index: CRATE_DEF_INDEX });
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}
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// (restrict scope of mutable-borrow of `visible_parent_map`)
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{
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let visible_parent_map = &mut visible_parent_map;
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let mut add_child =
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|bfs_queue: &mut VecDeque<_>, child: &Export<hir::HirId>, parent: DefId| {
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if child.vis != ty::Visibility::Public {
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return;
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}
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if let Some(child) = child.res.opt_def_id() {
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match visible_parent_map.entry(child) {
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Entry::Occupied(mut entry) => {
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// If `child` is defined in crate `cnum`, ensure
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// that it is mapped to a parent in `cnum`.
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if child.krate == cnum && entry.get().krate != cnum {
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entry.insert(parent);
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}
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}
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Entry::Vacant(entry) => {
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entry.insert(parent);
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bfs_queue.push_back(child);
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}
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}
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}
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};
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while let Some(def) = bfs_queue.pop_front() {
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for child in tcx.item_children(def).iter() {
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add_child(bfs_queue, child, def);
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}
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}
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}
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visible_parent_map
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},
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dependency_formats: |tcx, cnum| {
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assert_eq!(cnum, LOCAL_CRATE);
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Lrc::new(crate::dependency_format::calculate(tcx))
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},
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has_global_allocator: |tcx, cnum| {
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assert_eq!(cnum, LOCAL_CRATE);
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CStore::from_tcx(tcx).has_global_allocator()
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},
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postorder_cnums: |tcx, cnum| {
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assert_eq!(cnum, LOCAL_CRATE);
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tcx.arena.alloc_slice(&CStore::from_tcx(tcx).crate_dependencies_in_postorder(cnum))
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},
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..*providers
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};
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}
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impl CStore {
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pub fn struct_field_names_untracked(&self, def: DefId, sess: &Session) -> Vec<Spanned<Symbol>> {
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self.get_crate_data(def.krate).get_struct_field_names(def.index, sess)
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}
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pub fn item_children_untracked(
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&self,
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def_id: DefId,
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sess: &Session,
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) -> Vec<Export<hir::HirId>> {
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let mut result = vec![];
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self.get_crate_data(def_id.krate).each_child_of_item(
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def_id.index,
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|child| result.push(child),
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sess,
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);
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result
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}
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pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
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let _prof_timer = sess.prof.generic_activity("metadata_load_macro");
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let data = self.get_crate_data(id.krate);
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if data.root.is_proc_macro_crate() {
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return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, sess));
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}
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let span = data.get_span(id.index, sess);
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let attrs = data.get_item_attrs(id.index, sess).collect();
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let ident = data.item_ident(id.index, sess);
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LoadedMacro::MacroDef(
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ast::Item {
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ident,
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id: ast::DUMMY_NODE_ID,
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span,
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attrs,
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kind: ast::ItemKind::MacroDef(data.get_macro(id.index, sess)),
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vis: ast::Visibility {
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|
span: span.shrink_to_lo(),
|
|
kind: ast::VisibilityKind::Inherited,
|
|
tokens: None,
|
|
},
|
|
tokens: None,
|
|
},
|
|
data.root.edition,
|
|
)
|
|
}
|
|
|
|
pub fn associated_item_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::AssocItem {
|
|
self.get_crate_data(def.krate).get_associated_item(def.index, sess)
|
|
}
|
|
|
|
pub fn crate_source_untracked(&self, cnum: CrateNum) -> CrateSource {
|
|
self.get_crate_data(cnum).source.clone()
|
|
}
|
|
|
|
pub fn get_span_untracked(&self, def_id: DefId, sess: &Session) -> Span {
|
|
self.get_crate_data(def_id.krate).get_span(def_id.index, sess)
|
|
}
|
|
|
|
pub fn item_generics_num_lifetimes(&self, def_id: DefId, sess: &Session) -> usize {
|
|
self.get_crate_data(def_id.krate).get_generics(def_id.index, sess).own_counts().lifetimes
|
|
}
|
|
|
|
pub fn module_expansion_untracked(&self, def_id: DefId, sess: &Session) -> ExpnId {
|
|
self.get_crate_data(def_id.krate).module_expansion(def_id.index, sess)
|
|
}
|
|
|
|
pub fn num_def_ids(&self, cnum: CrateNum) -> usize {
|
|
self.get_crate_data(cnum).num_def_ids()
|
|
}
|
|
}
|
|
|
|
impl CrateStore for CStore {
|
|
fn as_any(&self) -> &dyn Any {
|
|
self
|
|
}
|
|
|
|
fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol {
|
|
self.get_crate_data(cnum).root.name
|
|
}
|
|
|
|
fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
|
|
self.get_crate_data(cnum).private_dep
|
|
}
|
|
|
|
fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator {
|
|
self.get_crate_data(cnum).root.disambiguator
|
|
}
|
|
|
|
fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh {
|
|
self.get_crate_data(cnum).root.hash
|
|
}
|
|
|
|
/// 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.
|
|
fn def_key(&self, def: DefId) -> DefKey {
|
|
self.get_crate_data(def.krate).def_key(def.index)
|
|
}
|
|
|
|
fn def_kind(&self, def: DefId) -> DefKind {
|
|
self.get_crate_data(def.krate).def_kind(def.index)
|
|
}
|
|
|
|
fn def_path(&self, def: DefId) -> DefPath {
|
|
self.get_crate_data(def.krate).def_path(def.index)
|
|
}
|
|
|
|
fn def_path_hash(&self, def: DefId) -> DefPathHash {
|
|
self.get_crate_data(def.krate).def_path_hash(def.index)
|
|
}
|
|
|
|
// See `CrateMetadataRef::def_path_hash_to_def_id` for more details
|
|
fn def_path_hash_to_def_id(
|
|
&self,
|
|
cnum: CrateNum,
|
|
index_guess: u32,
|
|
hash: DefPathHash,
|
|
) -> Option<DefId> {
|
|
self.get_crate_data(cnum).def_path_hash_to_def_id(cnum, index_guess, hash)
|
|
}
|
|
|
|
fn crates_untracked(&self) -> Vec<CrateNum> {
|
|
let mut result = vec![];
|
|
self.iter_crate_data(|cnum, _| result.push(cnum));
|
|
result
|
|
}
|
|
|
|
fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
|
|
encoder::encode_metadata(tcx)
|
|
}
|
|
|
|
fn metadata_encoding_version(&self) -> &[u8] {
|
|
rmeta::METADATA_HEADER
|
|
}
|
|
|
|
fn allocator_kind(&self) -> Option<AllocatorKind> {
|
|
self.allocator_kind()
|
|
}
|
|
}
|