1 use crate::dep_graph::SerializedDepNodeIndex;
2 use crate::mir::interpret::{GlobalId, LitToConstInput};
4 use crate::traits::query::{
5 CanonicalPredicateGoal, CanonicalProjectionGoal, CanonicalTyGoal,
6 CanonicalTypeOpAscribeUserTypeGoal, CanonicalTypeOpEqGoal, CanonicalTypeOpNormalizeGoal,
7 CanonicalTypeOpProvePredicateGoal, CanonicalTypeOpSubtypeGoal,
9 use crate::ty::query::queries;
10 use crate::ty::subst::{GenericArg, SubstsRef};
11 use crate::ty::{self, ParamEnvAnd, Ty, TyCtxt};
12 use rustc_hir::def_id::{CrateNum, DefId, LocalDefId};
13 use rustc_query_system::query::QueryDescription;
15 use rustc_span::symbol::Symbol;
18 fn describe_as_module(def_id: LocalDefId, tcx: TyCtxt<'_>) -> String {
19 if def_id.is_top_level_module() {
20 "top-level module".to_string()
22 format!("module `{}`", tcx.def_path_str(def_id.to_def_id()))
26 // Each of these queries corresponds to a function pointer field in the
27 // `Providers` struct for requesting a value of that type, and a method
28 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
29 // which memoizes and does dep-graph tracking, wrapping around the actual
30 // `Providers` that the driver creates (using several `rustc_*` crates).
32 // The result type of each query must implement `Clone`, and additionally
33 // `ty::query::values::Value`, which produces an appropriate placeholder
34 // (error) value if the query resulted in a query cycle.
35 // Queries marked with `fatal_cycle` do not need the latter implementation,
36 // as they will raise an fatal error on query cycles instead.
39 query trigger_delay_span_bug(key: DefId) -> () {
40 desc { "trigger a delay span bug" }
45 // Represents crate as a whole (as distinct from the top-level crate module).
46 // If you call `hir_crate` (e.g., indirectly by calling `tcx.hir().krate()`),
47 // we will have to assume that any change means that you need to be recompiled.
48 // This is because the `hir_crate` query gives you access to all other items.
49 // To avoid this fate, do not call `tcx.hir().krate()`; instead,
50 // prefer wrappers like `tcx.visit_all_items_in_krate()`.
51 query hir_crate(key: CrateNum) -> &'tcx Crate<'tcx> {
54 desc { "get the crate HIR" }
57 // The indexed HIR. This can be conveniently accessed by `tcx.hir()`.
58 // Avoid calling this query directly.
59 query index_hir(_: CrateNum) -> &'tcx map::IndexedHir<'tcx> {
65 // The items in a module.
67 // This can be conveniently accessed by `tcx.hir().visit_item_likes_in_module`.
68 // Avoid calling this query directly.
69 query hir_module_items(key: LocalDefId) -> &'tcx hir::ModuleItems {
71 desc { |tcx| "HIR module items in `{}`", tcx.def_path_str(key.to_def_id()) }
74 // Gives access to the HIR node for the HIR owner `key`.
76 // This can be conveniently accessed by methods on `tcx.hir()`.
77 // Avoid calling this query directly.
78 query hir_owner(key: LocalDefId) -> Option<&'tcx crate::hir::Owner<'tcx>> {
80 desc { |tcx| "HIR owner of `{}`", tcx.def_path_str(key.to_def_id()) }
83 // Gives access to the HIR nodes and bodies inside the HIR owner `key`.
85 // This can be conveniently accessed by methods on `tcx.hir()`.
86 // Avoid calling this query directly.
87 query hir_owner_nodes(key: LocalDefId) -> Option<&'tcx crate::hir::OwnerNodes<'tcx>> {
89 desc { |tcx| "HIR owner items in `{}`", tcx.def_path_str(key.to_def_id()) }
92 /// Computes the `DefId` of the corresponding const parameter in case the `key` is a
93 /// const argument and returns `None` otherwise.
96 /// let a = foo::<7>();
97 /// // ^ Calling `opt_const_param_of` for this argument,
99 /// fn foo<const N: usize>()
100 /// // ^ returns this `DefId`.
103 /// // ^ While calling `opt_const_param_of` for other bodies returns `None`.
106 query opt_const_param_of(key: LocalDefId) -> Option<DefId> {
107 desc { |tcx| "computing the optional const parameter of `{}`", tcx.def_path_str(key.to_def_id()) }
108 // FIXME(#74113): consider storing this query on disk.
111 /// Records the type of every item.
112 query type_of(key: DefId) -> Ty<'tcx> {
113 desc { |tcx| "computing type of `{}`", tcx.def_path_str(key) }
114 cache_on_disk_if { key.is_local() }
117 query analysis(key: CrateNum) -> Result<(), ErrorReported> {
119 desc { "running analysis passes on this crate" }
122 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
123 /// associated generics.
124 query generics_of(key: DefId) -> ty::Generics {
125 desc { |tcx| "computing generics of `{}`", tcx.def_path_str(key) }
126 storage(ArenaCacheSelector<'tcx>)
127 cache_on_disk_if { key.is_local() }
128 load_cached(tcx, id) {
129 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
130 .try_load_query_result(tcx, id);
135 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
136 /// predicates (where-clauses) that must be proven true in order
137 /// to reference it. This is almost always the "predicates query"
140 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
141 /// it is almost always the same as that query, except for the
142 /// case of traits. For traits, `predicates_of` contains
143 /// an additional `Self: Trait<...>` predicate that users don't
144 /// actually write. This reflects the fact that to invoke the
145 /// trait (e.g., via `Default::default`) you must supply types
146 /// that actually implement the trait. (However, this extra
147 /// predicate gets in the way of some checks, which are intended
148 /// to operate over only the actual where-clauses written by the
150 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
151 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
152 cache_on_disk_if { key.is_local() }
155 /// Returns the list of predicates that can be used for
156 /// `SelectionCandidate::ProjectionCandidate` and
157 /// `ProjectionTyCandidate::TraitDef`.
158 /// Specifically this is the bounds (equivalent to) those
159 /// written on the trait's type definition, or those
160 /// after the `impl` keyword
162 /// type X: Bound + 'lt
164 /// impl Debug + Display
167 /// `key` is the `DefId` of the associated type or opaque type.
168 query projection_predicates(key: DefId) -> &'tcx ty::List<ty::Predicate<'tcx>> {
169 desc { |tcx| "finding projection predicates for `{}`", tcx.def_path_str(key) }
172 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLib>> {
173 desc { "looking up the native libraries of a linked crate" }
176 query lint_levels(_: CrateNum) -> LintLevelMap {
177 storage(ArenaCacheSelector<'tcx>)
179 desc { "computing the lint levels for items in this crate" }
182 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
184 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
189 query is_panic_runtime(_: CrateNum) -> bool {
191 desc { "checking if the crate is_panic_runtime" }
196 /// Set of all the `DefId`s in this crate that have MIR associated with
197 /// them. This includes all the body owners, but also things like struct
199 query mir_keys(_: CrateNum) -> FxHashSet<LocalDefId> {
200 storage(ArenaCacheSelector<'tcx>)
201 desc { "getting a list of all mir_keys" }
204 /// Maps DefId's that have an associated `mir::Body` to the result
205 /// of the MIR const-checking pass. This is the set of qualifs in
206 /// the final value of a `const`.
207 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
208 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
209 cache_on_disk_if { key.is_local() }
211 query mir_const_qualif_const_arg(
212 key: (LocalDefId, DefId)
213 ) -> mir::ConstQualifs {
215 |tcx| "const checking the const argument `{}`",
216 tcx.def_path_str(key.0.to_def_id())
220 /// Fetch the MIR for a given `DefId` right after it's built - this includes
221 /// unreachable code.
222 query mir_built(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
223 desc { |tcx| "building MIR for `{}`", tcx.def_path_str(key.did.to_def_id()) }
226 /// Fetch the MIR for a given `DefId` up till the point where it is
227 /// ready for const qualification.
229 /// See the README for the `mir` module for details.
230 query mir_const(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
232 |tcx| "processing MIR for {}`{}`",
233 if key.const_param_did.is_some() { "the const argument " } else { "" },
234 tcx.def_path_str(key.did.to_def_id()),
239 query mir_drops_elaborated_and_const_checked(
240 key: ty::WithOptConstParam<LocalDefId>
241 ) -> &'tcx Steal<mir::Body<'tcx>> {
243 desc { |tcx| "elaborating drops for `{}`", tcx.def_path_str(key.did.to_def_id()) }
246 query mir_validated(key: ty::WithOptConstParam<LocalDefId>) ->
248 &'tcx Steal<mir::Body<'tcx>>,
249 &'tcx Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
253 |tcx| "processing {}`{}`",
254 if key.const_param_did.is_some() { "the const argument " } else { "" },
255 tcx.def_path_str(key.did.to_def_id()),
259 /// MIR after our optimization passes have run. This is MIR that is ready
260 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
261 query optimized_mir(key: DefId) -> &'tcx mir::Body<'tcx> {
262 desc { |tcx| "optimizing MIR for `{}`", tcx.def_path_str(key) }
263 cache_on_disk_if { key.is_local() }
265 query optimized_mir_of_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::Body<'tcx> {
267 |tcx| "optimizing MIR for the const argument `{}`",
268 tcx.def_path_str(key.0.to_def_id())
272 /// Returns coverage summary info for a function, after executing the `InstrumentCoverage`
273 /// MIR pass (assuming the -Zinstrument-coverage option is enabled).
274 query coverageinfo(key: DefId) -> mir::CoverageInfo {
275 desc { |tcx| "retrieving coverage info from MIR for `{}`", tcx.def_path_str(key) }
276 storage(ArenaCacheSelector<'tcx>)
277 cache_on_disk_if { key.is_local() }
280 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
281 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
282 cache_on_disk_if { key.is_local() }
284 query promoted_mir_of_const_arg(
285 key: (LocalDefId, DefId)
286 ) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
288 |tcx| "optimizing promoted MIR for the const argument `{}`",
289 tcx.def_path_str(key.0.to_def_id()),
295 // Erases regions from `ty` to yield a new type.
296 // Normally you would just use `tcx.erase_regions(&value)`,
297 // however, which uses this query as a kind of cache.
298 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
299 // This query is not expected to have input -- as a result, it
300 // is not a good candidates for "replay" because it is essentially a
301 // pure function of its input (and hence the expectation is that
302 // no caller would be green **apart** from just these
303 // queries). Making it anonymous avoids hashing the result, which
304 // may save a bit of time.
306 desc { "erasing regions from `{:?}`", ty }
311 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
312 storage(ArenaCacheSelector<'tcx>)
313 desc { "wasm import module map" }
318 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
319 /// predicates (where-clauses) directly defined on it. This is
320 /// equal to the `explicit_predicates_of` predicates plus the
321 /// `inferred_outlives_of` predicates.
322 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
323 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
326 /// Returns the predicates written explicitly by the user.
327 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
328 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
331 /// Returns the inferred outlives predicates (e.g., for `struct
332 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
333 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
334 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
337 /// Maps from the `DefId` of a trait to the list of
338 /// super-predicates. This is a subset of the full list of
339 /// predicates. We store these in a separate map because we must
340 /// evaluate them even during type conversion, often before the
341 /// full predicates are available (note that supertraits have
342 /// additional acyclicity requirements).
343 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
344 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
347 /// To avoid cycles within the predicates of a single item we compute
348 /// per-type-parameter predicates for resolving `T::AssocTy`.
349 query type_param_predicates(key: (DefId, LocalDefId)) -> ty::GenericPredicates<'tcx> {
350 desc { |tcx| "computing the bounds for type parameter `{}`", {
351 let id = tcx.hir().as_local_hir_id(key.1);
352 tcx.hir().ty_param_name(id)
356 query trait_def(key: DefId) -> ty::TraitDef {
357 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
358 storage(ArenaCacheSelector<'tcx>)
360 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
361 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
363 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
364 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
367 // The cycle error here should be reported as an error by `check_representable`.
368 // We consider the type as Sized in the meanwhile to avoid
369 // further errors (done in impl Value for AdtSizedConstraint).
370 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
371 // in case we accidentally otherwise don't emit an error.
372 query adt_sized_constraint(
374 ) -> AdtSizedConstraint<'tcx> {
375 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
379 query adt_dtorck_constraint(
381 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
382 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
385 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
386 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
387 /// not have the feature gate active).
389 /// **Do not call this function manually.** It is only meant to cache the base data for the
390 /// `is_const_fn` function.
391 query is_const_fn_raw(key: DefId) -> bool {
392 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
395 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
397 /// This query caches the base data for the `is_const_impl` helper function, which also
398 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
399 query is_const_impl_raw(key: DefId) -> bool {
400 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
403 query asyncness(key: DefId) -> hir::IsAsync {
404 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
407 /// Returns `true` if calls to the function may be promoted.
409 /// This is either because the function is e.g., a tuple-struct or tuple-variant
410 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
411 /// be removed in the future in favour of some form of check which figures out whether the
412 /// function does not inspect the bits of any of its arguments (so is essentially just a
413 /// constructor function).
414 query is_promotable_const_fn(key: DefId) -> bool {
415 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
418 query const_fn_is_allowed_fn_ptr(key: DefId) -> bool {
419 desc { |tcx| "checking if const fn allows `fn()` types: `{}`", tcx.def_path_str(key) }
422 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
423 query is_foreign_item(key: DefId) -> bool {
424 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
427 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
428 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
429 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
432 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
433 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
434 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
437 /// Gets a map with the variance of every item; use `item_variance` instead.
438 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
439 storage(ArenaCacheSelector<'tcx>)
440 desc { "computing the variances for items in this crate" }
443 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
444 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
445 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
450 /// Maps from thee `DefId` of a type to its (inferred) outlives.
451 query inferred_outlives_crate(_: CrateNum)
452 -> ty::CratePredicatesMap<'tcx> {
453 storage(ArenaCacheSelector<'tcx>)
454 desc { "computing the inferred outlives predicates for items in this crate" }
459 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
460 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
461 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
464 /// Maps from a trait item to the trait item "descriptor".
465 query associated_item(key: DefId) -> ty::AssocItem {
466 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
467 storage(ArenaCacheSelector<'tcx>)
470 /// Collects the associated items defined on a trait or impl.
471 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
472 storage(ArenaCacheSelector<'tcx>)
473 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
476 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
477 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
479 query impl_polarity(key: DefId) -> ty::ImplPolarity {
480 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
483 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
484 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
489 /// Maps a `DefId` of a type to a list of its inherent impls.
490 /// Contains implementations of methods that are inherent to a type.
491 /// Methods in these implementations don't need to be exported.
492 query inherent_impls(key: DefId) -> &'tcx [DefId] {
493 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
499 /// The result of unsafety-checking this `LocalDefId`.
500 query unsafety_check_result(key: LocalDefId) -> &'tcx mir::UnsafetyCheckResult {
501 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
502 cache_on_disk_if { true }
504 query unsafety_check_result_for_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::UnsafetyCheckResult {
506 |tcx| "unsafety-checking the const argument `{}`",
507 tcx.def_path_str(key.0.to_def_id())
511 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
513 /// Unsafety checking is executed for each method separately, but we only want
514 /// to emit this error once per derive. As there are some impls with multiple
515 /// methods, we use a query for deduplication.
516 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
517 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
520 /// The signature of functions.
521 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
522 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
527 query lint_mod(key: LocalDefId) -> () {
528 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
531 /// Checks the attributes in the module.
532 query check_mod_attrs(key: LocalDefId) -> () {
533 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
536 query check_mod_unstable_api_usage(key: LocalDefId) -> () {
537 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
540 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
541 query check_mod_const_bodies(key: LocalDefId) -> () {
542 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
545 /// Checks the loops in the module.
546 query check_mod_loops(key: LocalDefId) -> () {
547 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
550 query check_mod_item_types(key: LocalDefId) -> () {
551 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
554 query check_mod_privacy(key: LocalDefId) -> () {
555 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
558 query check_mod_intrinsics(key: LocalDefId) -> () {
559 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
562 query check_mod_liveness(key: LocalDefId) -> () {
563 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
566 query check_mod_impl_wf(key: LocalDefId) -> () {
567 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
570 query collect_mod_item_types(key: LocalDefId) -> () {
571 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
574 /// Caches `CoerceUnsized` kinds for impls on custom types.
575 query coerce_unsized_info(key: DefId)
576 -> ty::adjustment::CoerceUnsizedInfo {
577 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
582 query typeck_item_bodies(_: CrateNum) -> () {
583 desc { "type-checking all item bodies" }
586 query typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
587 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
588 cache_on_disk_if { true }
590 query typeck_const_arg(
591 key: (LocalDefId, DefId)
592 ) -> &'tcx ty::TypeckResults<'tcx> {
594 |tcx| "type-checking the const argument `{}`",
595 tcx.def_path_str(key.0.to_def_id()),
598 query diagnostic_only_typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
599 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
600 cache_on_disk_if { true }
601 load_cached(tcx, id) {
602 let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
603 .queries.on_disk_cache
604 .try_load_query_result(tcx, id);
606 typeck_results.map(|x| &*tcx.arena.alloc(x))
612 query used_trait_imports(key: LocalDefId) -> &'tcx FxHashSet<LocalDefId> {
613 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
614 cache_on_disk_if { true }
619 query has_typeck_results(def_id: DefId) -> bool {
620 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
623 query coherent_trait(def_id: DefId) -> () {
624 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
629 /// Borrow-checks the function body. If this is a closure, returns
630 /// additional requirements that the closure's creator must verify.
631 query mir_borrowck(key: LocalDefId) -> &'tcx mir::BorrowCheckResult<'tcx> {
632 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
633 cache_on_disk_if(tcx, opt_result) {
634 tcx.is_closure(key.to_def_id())
635 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
638 query mir_borrowck_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::BorrowCheckResult<'tcx> {
640 |tcx| "borrow-checking the const argument`{}`",
641 tcx.def_path_str(key.0.to_def_id())
647 /// Gets a complete map from all types to their inherent impls.
648 /// Not meant to be used directly outside of coherence.
649 /// (Defined only for `LOCAL_CRATE`.)
650 query crate_inherent_impls(k: CrateNum)
651 -> CrateInherentImpls {
652 storage(ArenaCacheSelector<'tcx>)
654 desc { "all inherent impls defined in crate `{:?}`", k }
657 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
658 /// Not meant to be used directly outside of coherence.
659 /// (Defined only for `LOCAL_CRATE`.)
660 query crate_inherent_impls_overlap_check(_: CrateNum)
663 desc { "check for overlap between inherent impls defined in this crate" }
668 /// Evaluates a constant without running sanity checks.
670 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
671 /// during validation. Please add a comment to every use site explaining why using
672 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
673 /// form to be used outside of const eval.
674 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
675 -> ConstEvalRawResult<'tcx> {
677 "const-evaluating `{}`",
678 tcx.def_path_str(key.value.instance.def.def_id())
682 /// Results of evaluating const items or constants embedded in
683 /// other items (such as enum variant explicit discriminants).
685 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
686 /// returns a proper constant that is usable by the rest of the compiler.
688 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
689 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
690 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
691 -> ConstEvalResult<'tcx> {
693 "const-evaluating + checking `{}`",
694 tcx.def_path_str(key.value.instance.def.def_id())
696 cache_on_disk_if(_, opt_result) {
697 // Only store results without errors
698 opt_result.map_or(true, |r| r.is_ok())
702 /// Destructure a constant ADT or array into its variant index and its
704 query destructure_const(
705 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
706 ) -> mir::DestructuredConst<'tcx> {
707 desc { "destructure constant" }
710 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
711 desc { "get a &core::panic::Location referring to a span" }
715 key: LitToConstInput<'tcx>
716 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
717 desc { "converting literal to const" }
722 query check_match(key: DefId) {
723 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
724 cache_on_disk_if { key.is_local() }
727 /// Performs part of the privacy check and computes "access levels".
728 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
730 desc { "privacy access levels" }
732 query check_private_in_public(_: CrateNum) -> () {
734 desc { "checking for private elements in public interfaces" }
739 query reachable_set(_: CrateNum) -> &'tcx HirIdSet {
740 desc { "reachability" }
743 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
744 /// in the case of closures, this will be redirected to the enclosing function.
745 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
746 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
749 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
750 storage(ArenaCacheSelector<'tcx>)
751 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
754 /// The `symbol_name` query provides the symbol name for calling a
755 /// given instance from the local crate. In particular, it will also
756 /// look up the correct symbol name of instances from upstream crates.
757 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName<'tcx> {
758 desc { "computing the symbol for `{}`", key }
759 cache_on_disk_if { true }
762 query def_kind(def_id: DefId) -> DefKind {
763 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
765 query def_span(def_id: DefId) -> Span {
766 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
767 // FIXME(mw): DefSpans are not really inputs since they are derived from
768 // HIR. But at the moment HIR hashing still contains some hacks that allow
769 // to make type debuginfo to be source location independent. Declaring
770 // DefSpan an input makes sure that changes to these are always detected
771 // regardless of HIR hashing.
774 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
775 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
777 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
778 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
780 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
781 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
783 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
784 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
789 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
790 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
791 storage(ArenaCacheSelector<'tcx>)
792 cache_on_disk_if { true }
797 query fn_arg_names(def_id: DefId) -> &'tcx [rustc_span::symbol::Ident] {
798 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
800 /// Gets the rendered value of the specified constant or associated constant.
802 query rendered_const(def_id: DefId) -> String {
803 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
805 query impl_parent(def_id: DefId) -> Option<DefId> {
806 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
811 query trait_of_item(def_id: DefId) -> Option<DefId> {
812 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
817 query is_mir_available(key: DefId) -> bool {
818 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
823 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
824 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
825 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
830 query codegen_fulfill_obligation(
831 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
832 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
833 cache_on_disk_if { true }
835 "checking if `{}` fulfills its obligations",
836 tcx.def_path_str(key.1.def_id())
842 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
843 desc { "local trait impls" }
845 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
846 storage(ArenaCacheSelector<'tcx>)
847 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
849 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
850 storage(ArenaCacheSelector<'tcx>)
851 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
852 cache_on_disk_if { true }
854 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
855 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
858 /// Gets the ParameterEnvironment for a given item; this environment
859 /// will be in "user-facing" mode, meaning that it is suitable for
860 /// type-checking etc, and it does not normalize specializable
861 /// associated types. This is almost always what you want,
862 /// unless you are doing MIR optimizations, in which case you
863 /// might want to use `reveal_all()` method to change modes.
864 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
865 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
868 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
869 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
870 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
871 desc { "computing whether `{}` is `Copy`", env.value }
873 /// Query backing `TyS::is_sized`.
874 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
875 desc { "computing whether `{}` is `Sized`", env.value }
877 /// Query backing `TyS::is_freeze`.
878 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
879 desc { "computing whether `{}` is freeze", env.value }
881 /// Query backing `TyS::needs_drop`.
882 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
883 desc { "computing whether `{}` needs drop", env.value }
886 /// Query backing `TyS::is_structural_eq_shallow`.
888 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
890 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
892 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
897 /// A list of types where the ADT requires drop if and only if any of
898 /// those types require drop. If the ADT is known to always need drop
899 /// then `Err(AlwaysRequiresDrop)` is returned.
900 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
901 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
902 cache_on_disk_if { true }
906 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
907 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
908 desc { "computing layout of `{}`", env.value }
913 query dylib_dependency_formats(_: CrateNum)
914 -> &'tcx [(CrateNum, LinkagePreference)] {
915 desc { "dylib dependency formats of crate" }
918 query dependency_formats(_: CrateNum)
919 -> Lrc<crate::middle::dependency_format::Dependencies>
921 desc { "get the linkage format of all dependencies" }
926 query is_compiler_builtins(_: CrateNum) -> bool {
928 desc { "checking if the crate is_compiler_builtins" }
930 query has_global_allocator(_: CrateNum) -> bool {
932 desc { "checking if the crate has_global_allocator" }
934 query has_panic_handler(_: CrateNum) -> bool {
936 desc { "checking if the crate has_panic_handler" }
938 query is_profiler_runtime(_: CrateNum) -> bool {
940 desc { "query a crate is `#![profiler_runtime]`" }
942 query panic_strategy(_: CrateNum) -> PanicStrategy {
944 desc { "query a crate's configured panic strategy" }
946 query is_no_builtins(_: CrateNum) -> bool {
948 desc { "test whether a crate has `#![no_builtins]`" }
950 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
952 desc { "query a crate's symbol mangling version" }
955 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
957 desc { "getting crate's ExternCrateData" }
962 query specializes(_: (DefId, DefId)) -> bool {
963 desc { "computing whether impls specialize one another" }
965 query in_scope_traits_map(_: LocalDefId)
966 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
968 desc { "traits in scope at a block" }
973 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
974 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
980 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
981 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
984 query check_item_well_formed(key: LocalDefId) -> () {
985 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
987 query check_trait_item_well_formed(key: LocalDefId) -> () {
988 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
990 query check_impl_item_well_formed(key: LocalDefId) -> () {
991 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
997 // The `DefId`s of all non-generic functions and statics in the given crate
998 // that can be reached from outside the crate.
1000 // We expect this items to be available for being linked to.
1002 // This query can also be called for `LOCAL_CRATE`. In this case it will
1003 // compute which items will be reachable to other crates, taking into account
1004 // the kind of crate that is currently compiled. Crates with only a
1005 // C interface have fewer reachable things.
1007 // Does not include external symbols that don't have a corresponding DefId,
1008 // like the compiler-generated `main` function and so on.
1009 query reachable_non_generics(_: CrateNum)
1010 -> DefIdMap<SymbolExportLevel> {
1011 storage(ArenaCacheSelector<'tcx>)
1012 desc { "looking up the exported symbols of a crate" }
1014 query is_reachable_non_generic(def_id: DefId) -> bool {
1015 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
1017 query is_unreachable_local_definition(def_id: DefId) -> bool {
1019 "checking whether `{}` is reachable from outside the crate",
1020 tcx.def_path_str(def_id),
1026 /// The entire set of monomorphizations the local crate can safely link
1027 /// to because they are exported from upstream crates. Do not depend on
1028 /// this directly, as its value changes anytime a monomorphization gets
1029 /// added or removed in any upstream crate. Instead use the narrower
1030 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
1031 /// better, `Instance::upstream_monomorphization()`.
1032 query upstream_monomorphizations(
1034 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1035 storage(ArenaCacheSelector<'tcx>)
1036 desc { "collecting available upstream monomorphizations `{:?}`", k }
1039 /// Returns the set of upstream monomorphizations available for the
1040 /// generic function identified by the given `def_id`. The query makes
1041 /// sure to make a stable selection if the same monomorphization is
1042 /// available in multiple upstream crates.
1044 /// You likely want to call `Instance::upstream_monomorphization()`
1045 /// instead of invoking this query directly.
1046 query upstream_monomorphizations_for(def_id: DefId)
1047 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1049 "collecting available upstream monomorphizations for `{}`",
1050 tcx.def_path_str(def_id),
1054 /// Returns the upstream crate that exports drop-glue for the given
1055 /// type (`substs` is expected to be a single-item list containing the
1056 /// type one wants drop-glue for).
1058 /// This is a subset of `upstream_monomorphizations_for` in order to
1059 /// increase dep-tracking granularity. Otherwise adding or removing any
1060 /// type with drop-glue in any upstream crate would invalidate all
1061 /// functions calling drop-glue of an upstream type.
1063 /// You likely want to call `Instance::upstream_monomorphization()`
1064 /// instead of invoking this query directly.
1066 /// NOTE: This query could easily be extended to also support other
1067 /// common functions that have are large set of monomorphizations
1068 /// (like `Clone::clone` for example).
1069 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
1070 desc { "available upstream drop-glue for `{:?}`", substs }
1075 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
1076 desc { "looking up the foreign modules of a linked crate" }
1079 /// Identifies the entry-point (e.g., the `main` function) for a given
1080 /// crate, returning `None` if there is no entry point (such as for library crates).
1081 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1082 desc { "looking up the entry function of a crate" }
1084 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1085 desc { "looking up the plugin registrar for a crate" }
1087 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1088 desc { "looking up the derive registrar for a crate" }
1090 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1092 desc { "looking up the disambiguator a crate" }
1094 query crate_hash(_: CrateNum) -> Svh {
1096 desc { "looking up the hash a crate" }
1098 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1100 desc { "looking up the hash of a host version of a crate" }
1102 query original_crate_name(_: CrateNum) -> Symbol {
1104 desc { "looking up the original name a crate" }
1106 query extra_filename(_: CrateNum) -> String {
1108 desc { "looking up the extra filename for a crate" }
1110 query crate_extern_paths(_: CrateNum) -> Vec<PathBuf> {
1112 desc { "looking up the paths for extern crates" }
1117 query implementations_of_trait(_: (CrateNum, DefId))
1119 desc { "looking up implementations of a trait in a crate" }
1121 query all_trait_implementations(_: CrateNum)
1123 desc { "looking up all (?) trait implementations" }
1128 query dllimport_foreign_items(_: CrateNum)
1129 -> FxHashSet<DefId> {
1130 storage(ArenaCacheSelector<'tcx>)
1131 desc { "dllimport_foreign_items" }
1133 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1134 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1136 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1137 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1139 query native_library_kind(def_id: DefId)
1140 -> Option<NativeLibKind> {
1141 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1146 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1148 desc { "looking up link arguments for a crate" }
1153 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1154 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1155 storage(ArenaCacheSelector<'tcx>)
1156 desc { "resolving lifetimes" }
1158 query named_region_map(_: LocalDefId) ->
1159 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1160 desc { "looking up a named region" }
1162 query is_late_bound_map(_: LocalDefId) ->
1163 Option<&'tcx FxHashSet<ItemLocalId>> {
1164 desc { "testing if a region is late bound" }
1166 query object_lifetime_defaults_map(_: LocalDefId)
1167 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1168 desc { "looking up lifetime defaults for a region" }
1173 query visibility(def_id: DefId) -> ty::Visibility {
1174 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1179 query dep_kind(_: CrateNum) -> DepKind {
1181 desc { "fetching what a dependency looks like" }
1183 query crate_name(_: CrateNum) -> Symbol {
1185 desc { "fetching what a crate is named" }
1187 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1188 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1190 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1191 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1194 query get_lib_features(_: CrateNum) -> LibFeatures {
1195 storage(ArenaCacheSelector<'tcx>)
1197 desc { "calculating the lib features map" }
1199 query defined_lib_features(_: CrateNum)
1200 -> &'tcx [(Symbol, Option<Symbol>)] {
1201 desc { "calculating the lib features defined in a crate" }
1203 /// Returns the lang items defined in another crate by loading it from metadata.
1204 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1205 // of that argument?
1206 query get_lang_items(_: CrateNum) -> LanguageItems {
1207 storage(ArenaCacheSelector<'tcx>)
1209 desc { "calculating the lang items map" }
1212 /// Returns all diagnostic items defined in all crates.
1213 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1214 storage(ArenaCacheSelector<'tcx>)
1216 desc { "calculating the diagnostic items map" }
1219 /// Returns the lang items defined in another crate by loading it from metadata.
1220 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1221 desc { "calculating the lang items defined in a crate" }
1224 /// Returns the diagnostic items defined in a crate.
1225 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1226 storage(ArenaCacheSelector<'tcx>)
1227 desc { "calculating the diagnostic items map in a crate" }
1230 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1231 desc { "calculating the missing lang items in a crate" }
1233 query visible_parent_map(_: CrateNum)
1234 -> DefIdMap<DefId> {
1235 storage(ArenaCacheSelector<'tcx>)
1236 desc { "calculating the visible parent map" }
1238 query missing_extern_crate_item(_: CrateNum) -> bool {
1240 desc { "seeing if we're missing an `extern crate` item for this crate" }
1242 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1244 desc { "looking at the source for a crate" }
1246 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1248 desc { "generating a postorder list of CrateNums" }
1251 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1252 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1255 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1257 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1259 query maybe_unused_extern_crates(_: CrateNum)
1260 -> &'tcx [(LocalDefId, Span)] {
1262 desc { "looking up all possibly unused extern crates" }
1264 query names_imported_by_glob_use(def_id: LocalDefId)
1265 -> &'tcx FxHashSet<Symbol> {
1267 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1270 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1271 storage(ArenaCacheSelector<'tcx>)
1273 desc { "calculating the stability index for the local crate" }
1275 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1277 desc { "fetching all foreign CrateNum instances" }
1280 /// A vector of every trait accessible in the whole crate
1281 /// (i.e., including those from subcrates). This is used only for
1282 /// error reporting.
1283 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1284 desc { "fetching all foreign and local traits" }
1289 /// The list of symbols exported from the given crate.
1291 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1292 /// correspond to a publicly visible symbol in `cnum` machine code.
1293 /// - The `exported_symbols` sets of different crates do not intersect.
1294 query exported_symbols(_: CrateNum)
1295 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1296 desc { "exported_symbols" }
1301 query collect_and_partition_mono_items(_: CrateNum)
1302 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1304 desc { "collect_and_partition_mono_items" }
1306 query is_codegened_item(def_id: DefId) -> bool {
1307 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1309 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1310 desc { "codegen_unit" }
1312 query backend_optimization_level(_: CrateNum) -> OptLevel {
1313 desc { "optimization level used by backend" }
1318 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1320 desc { "output_filenames" }
1325 /// Do not call this query directly: invoke `normalize` instead.
1326 query normalize_projection_ty(
1327 goal: CanonicalProjectionGoal<'tcx>
1329 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1332 desc { "normalizing `{:?}`", goal }
1335 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1336 query normalize_generic_arg_after_erasing_regions(
1337 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1338 ) -> GenericArg<'tcx> {
1339 desc { "normalizing `{}`", goal.value }
1342 query implied_outlives_bounds(
1343 goal: CanonicalTyGoal<'tcx>
1345 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1348 desc { "computing implied outlives bounds for `{:?}`", goal }
1351 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1352 query dropck_outlives(
1353 goal: CanonicalTyGoal<'tcx>
1355 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1358 desc { "computing dropck types for `{:?}`", goal }
1361 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1362 /// `infcx.predicate_must_hold()` instead.
1363 query evaluate_obligation(
1364 goal: CanonicalPredicateGoal<'tcx>
1365 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1366 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1369 query evaluate_goal(
1370 goal: traits::ChalkCanonicalGoal<'tcx>
1372 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1375 desc { "evaluating trait selection obligation `{}`", goal.value }
1378 query type_implements_trait(
1379 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1381 desc { "evaluating `type_implements_trait` `{:?}`", key }
1384 /// Do not call this query directly: part of the `Eq` type-op
1385 query type_op_ascribe_user_type(
1386 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1388 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1391 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1394 /// Do not call this query directly: part of the `Eq` type-op
1396 goal: CanonicalTypeOpEqGoal<'tcx>
1398 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1401 desc { "evaluating `type_op_eq` `{:?}`", goal }
1404 /// Do not call this query directly: part of the `Subtype` type-op
1405 query type_op_subtype(
1406 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1408 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1411 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1414 /// Do not call this query directly: part of the `ProvePredicate` type-op
1415 query type_op_prove_predicate(
1416 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1418 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1421 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1424 /// Do not call this query directly: part of the `Normalize` type-op
1425 query type_op_normalize_ty(
1426 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1428 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1431 desc { "normalizing `{:?}`", goal }
1434 /// Do not call this query directly: part of the `Normalize` type-op
1435 query type_op_normalize_predicate(
1436 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1438 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1441 desc { "normalizing `{:?}`", goal }
1444 /// Do not call this query directly: part of the `Normalize` type-op
1445 query type_op_normalize_poly_fn_sig(
1446 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1448 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1451 desc { "normalizing `{:?}`", goal }
1454 /// Do not call this query directly: part of the `Normalize` type-op
1455 query type_op_normalize_fn_sig(
1456 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1458 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1461 desc { "normalizing `{:?}`", goal }
1464 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1466 "testing substituted normalized predicates:`{}`",
1467 tcx.def_path_str(key.0)
1471 query method_autoderef_steps(
1472 goal: CanonicalTyGoal<'tcx>
1473 ) -> MethodAutoderefStepsResult<'tcx> {
1474 desc { "computing autoderef types for `{:?}`", goal }
1479 query supported_target_features(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1480 storage(ArenaCacheSelector<'tcx>)
1482 desc { "looking up supported target features" }
1485 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1486 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1488 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1491 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1493 desc { "looking up enabled feature gates" }
1496 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1497 /// given generics args (`SubstsRef`), returning one of:
1498 /// * `Ok(Some(instance))` on success
1499 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1500 /// and therefore don't allow finding the final `Instance`
1501 /// * `Err(ErrorReported)` when the `Instance` resolution process
1502 /// couldn't complete due to errors elsewhere - this is distinct
1503 /// from `Ok(None)` to avoid misleading diagnostics when an error
1504 /// has already been/will be emitted, for the original cause
1505 query resolve_instance(
1506 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1507 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1508 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }
1511 query resolve_instance_of_const_arg(
1512 key: ty::ParamEnvAnd<'tcx, (LocalDefId, DefId, SubstsRef<'tcx>)>
1513 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1515 "resolving instance of the const argument `{}`",
1516 ty::Instance::new(key.value.0.to_def_id(), key.value.2),