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: DefId, 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))
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 /// Records the type of every item.
93 query type_of(key: DefId) -> Ty<'tcx> {
94 desc { |tcx| "computing type of `{}`", tcx.def_path_str(key) }
95 cache_on_disk_if { key.is_local() }
98 query analysis(key: CrateNum) -> Result<(), ErrorReported> {
100 desc { "running analysis passes on this crate" }
103 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
104 /// associated generics.
105 query generics_of(key: DefId) -> ty::Generics {
106 desc { |tcx| "computing generics of `{}`", tcx.def_path_str(key) }
107 storage(ArenaCacheSelector<'tcx>)
108 cache_on_disk_if { key.is_local() }
109 load_cached(tcx, id) {
110 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
111 .try_load_query_result(tcx, id);
116 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
117 /// predicates (where-clauses) that must be proven true in order
118 /// to reference it. This is almost always the "predicates query"
121 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
122 /// it is almost always the same as that query, except for the
123 /// case of traits. For traits, `predicates_of` contains
124 /// an additional `Self: Trait<...>` predicate that users don't
125 /// actually write. This reflects the fact that to invoke the
126 /// trait (e.g., via `Default::default`) you must supply types
127 /// that actually implement the trait. (However, this extra
128 /// predicate gets in the way of some checks, which are intended
129 /// to operate over only the actual where-clauses written by the
131 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
132 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
133 cache_on_disk_if { key.is_local() }
136 /// Returns the list of predicates that can be used for
137 /// `SelectionCandidate::ProjectionCandidate` and
138 /// `ProjectionTyCandidate::TraitDef`.
139 /// Specifically this is the bounds (equivalent to) those
140 /// written on the trait's type definition, or those
141 /// after the `impl` keyword
143 /// type X: Bound + 'lt
145 /// impl Debug + Display
148 /// `key` is the `DefId` of the associated type or opaque type.
149 query projection_predicates(key: DefId) -> &'tcx ty::List<ty::Predicate<'tcx>> {
150 desc { |tcx| "finding projection predicates for `{}`", tcx.def_path_str(key) }
153 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLib>> {
154 desc { "looking up the native libraries of a linked crate" }
157 query lint_levels(_: CrateNum) -> LintLevelMap {
158 storage(ArenaCacheSelector<'tcx>)
160 desc { "computing the lint levels for items in this crate" }
163 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
165 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
170 query is_panic_runtime(_: CrateNum) -> bool {
172 desc { "checking if the crate is_panic_runtime" }
177 /// Set of all the `DefId`s in this crate that have MIR associated with
178 /// them. This includes all the body owners, but also things like struct
180 query mir_keys(_: CrateNum) -> FxHashSet<LocalDefId> {
181 storage(ArenaCacheSelector<'tcx>)
182 desc { "getting a list of all mir_keys" }
185 /// Maps DefId's that have an associated `mir::Body` to the result
186 /// of the MIR const-checking pass. This is the set of qualifs in
187 /// the final value of a `const`.
188 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
189 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
190 cache_on_disk_if { key.is_local() }
193 /// Fetch the MIR for a given `DefId` right after it's built - this includes
194 /// unreachable code.
195 query mir_built(key: LocalDefId) -> Steal<mir::Body<'tcx>> {
196 storage(ArenaCacheSelector<'tcx>)
197 desc { |tcx| "building MIR for `{}`", tcx.def_path_str(key.to_def_id()) }
200 /// Fetch the MIR for a given `DefId` up till the point where it is
201 /// ready for const qualification.
203 /// See the README for the `mir` module for details.
204 query mir_const(key: DefId) -> Steal<mir::Body<'tcx>> {
205 desc { |tcx| "processing MIR for `{}`", tcx.def_path_str(key) }
206 storage(ArenaCacheSelector<'tcx>)
210 query mir_drops_elaborated_and_const_checked(key: LocalDefId) -> Steal<mir::Body<'tcx>> {
211 storage(ArenaCacheSelector<'tcx>)
213 desc { |tcx| "elaborating drops for `{}`", tcx.def_path_str(key.to_def_id()) }
216 query mir_validated(key: LocalDefId) ->
218 Steal<mir::Body<'tcx>>,
219 Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
221 storage(ArenaCacheSelector<'tcx>)
223 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
226 /// MIR after our optimization passes have run. This is MIR that is ready
227 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
228 query optimized_mir(key: DefId) -> mir::Body<'tcx> {
229 desc { |tcx| "optimizing MIR for `{}`", tcx.def_path_str(key) }
230 storage(ArenaCacheSelector<'tcx>)
231 cache_on_disk_if { key.is_local() }
234 query coverage_data(key: DefId) -> mir::CoverageData {
235 desc { |tcx| "retrieving coverage data from MIR for `{}`", tcx.def_path_str(key) }
236 storage(ArenaCacheSelector<'tcx>)
237 cache_on_disk_if { key.is_local() }
240 query promoted_mir(key: DefId) -> IndexVec<mir::Promoted, mir::Body<'tcx>> {
241 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
242 storage(ArenaCacheSelector<'tcx>)
243 cache_on_disk_if { key.is_local() }
248 // Erases regions from `ty` to yield a new type.
249 // Normally you would just use `tcx.erase_regions(&value)`,
250 // however, which uses this query as a kind of cache.
251 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
252 // This query is not expected to have input -- as a result, it
253 // is not a good candidates for "replay" because it is essentially a
254 // pure function of its input (and hence the expectation is that
255 // no caller would be green **apart** from just these
256 // queries). Making it anonymous avoids hashing the result, which
257 // may save a bit of time.
259 desc { "erasing regions from `{:?}`", ty }
264 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
265 storage(ArenaCacheSelector<'tcx>)
266 desc { "wasm import module map" }
271 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
272 /// predicates (where-clauses) directly defined on it. This is
273 /// equal to the `explicit_predicates_of` predicates plus the
274 /// `inferred_outlives_of` predicates.
275 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
276 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
279 /// Returns the predicates written explicitly by the user.
280 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
281 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
284 /// Returns the inferred outlives predicates (e.g., for `struct
285 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
286 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
287 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
290 /// Maps from the `DefId` of a trait to the list of
291 /// super-predicates. This is a subset of the full list of
292 /// predicates. We store these in a separate map because we must
293 /// evaluate them even during type conversion, often before the
294 /// full predicates are available (note that supertraits have
295 /// additional acyclicity requirements).
296 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
297 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
300 /// To avoid cycles within the predicates of a single item we compute
301 /// per-type-parameter predicates for resolving `T::AssocTy`.
302 query type_param_predicates(key: (DefId, LocalDefId)) -> ty::GenericPredicates<'tcx> {
303 desc { |tcx| "computing the bounds for type parameter `{}`", {
304 let id = tcx.hir().as_local_hir_id(key.1);
305 tcx.hir().ty_param_name(id)
309 query trait_def(key: DefId) -> ty::TraitDef {
310 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
311 storage(ArenaCacheSelector<'tcx>)
313 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
314 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
316 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
317 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
320 // The cycle error here should be reported as an error by `check_representable`.
321 // We consider the type as Sized in the meanwhile to avoid
322 // further errors (done in impl Value for AdtSizedConstraint).
323 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
324 // in case we accidentally otherwise don't emit an error.
325 query adt_sized_constraint(
327 ) -> AdtSizedConstraint<'tcx> {
328 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
332 query adt_dtorck_constraint(
334 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
335 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
338 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
339 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
340 /// not have the feature gate active).
342 /// **Do not call this function manually.** It is only meant to cache the base data for the
343 /// `is_const_fn` function.
344 query is_const_fn_raw(key: DefId) -> bool {
345 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
348 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
350 /// This query caches the base data for the `is_const_impl` helper function, which also
351 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
352 query is_const_impl_raw(key: DefId) -> bool {
353 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
356 query asyncness(key: DefId) -> hir::IsAsync {
357 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
360 /// Returns `true` if calls to the function may be promoted.
362 /// This is either because the function is e.g., a tuple-struct or tuple-variant
363 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
364 /// be removed in the future in favour of some form of check which figures out whether the
365 /// function does not inspect the bits of any of its arguments (so is essentially just a
366 /// constructor function).
367 query is_promotable_const_fn(key: DefId) -> bool {
368 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
371 query const_fn_is_allowed_fn_ptr(key: DefId) -> bool {
372 desc { |tcx| "checking if const fn allows `fn()` types: `{}`", tcx.def_path_str(key) }
375 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
376 query is_foreign_item(key: DefId) -> bool {
377 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
380 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
381 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
382 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
385 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
386 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
387 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
390 /// Gets a map with the variance of every item; use `item_variance` instead.
391 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
392 storage(ArenaCacheSelector<'tcx>)
393 desc { "computing the variances for items in this crate" }
396 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
397 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
398 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
403 /// Maps from thee `DefId` of a type to its (inferred) outlives.
404 query inferred_outlives_crate(_: CrateNum)
405 -> ty::CratePredicatesMap<'tcx> {
406 storage(ArenaCacheSelector<'tcx>)
407 desc { "computing the inferred outlives predicates for items in this crate" }
412 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
413 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
414 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
417 /// Maps from a trait item to the trait item "descriptor".
418 query associated_item(key: DefId) -> ty::AssocItem {
419 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
420 storage(ArenaCacheSelector<'tcx>)
423 /// Collects the associated items defined on a trait or impl.
424 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
425 storage(ArenaCacheSelector<'tcx>)
426 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
429 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
430 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
432 query impl_polarity(key: DefId) -> ty::ImplPolarity {
433 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
436 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
437 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
442 /// Maps a `DefId` of a type to a list of its inherent impls.
443 /// Contains implementations of methods that are inherent to a type.
444 /// Methods in these implementations don't need to be exported.
445 query inherent_impls(key: DefId) -> &'tcx [DefId] {
446 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
452 /// The result of unsafety-checking this `DefId`.
453 query unsafety_check_result(key: LocalDefId) -> mir::UnsafetyCheckResult {
454 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
455 cache_on_disk_if { true }
456 storage(ArenaCacheSelector<'tcx>)
459 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
461 /// Unsafety checking is executed for each method separately, but we only want
462 /// to emit this error once per derive. As there are some impls with multiple
463 /// methods, we use a query for deduplication.
464 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
465 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
468 /// The signature of functions.
469 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
470 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
475 query lint_mod(key: LocalDefId) -> () {
476 desc { |tcx| "linting {}", describe_as_module(key.to_def_id(), tcx) }
479 /// Checks the attributes in the module.
480 query check_mod_attrs(key: DefId) -> () {
481 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
484 query check_mod_unstable_api_usage(key: DefId) -> () {
485 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
488 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
489 query check_mod_const_bodies(key: DefId) -> () {
490 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
493 /// Checks the loops in the module.
494 query check_mod_loops(key: DefId) -> () {
495 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
498 query check_mod_item_types(key: DefId) -> () {
499 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
502 query check_mod_privacy(key: LocalDefId) -> () {
503 desc { |tcx| "checking privacy in {}", describe_as_module(key.to_def_id(), tcx) }
506 query check_mod_intrinsics(key: DefId) -> () {
507 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
510 query check_mod_liveness(key: DefId) -> () {
511 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
514 query check_mod_impl_wf(key: DefId) -> () {
515 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
518 query collect_mod_item_types(key: DefId) -> () {
519 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
522 /// Caches `CoerceUnsized` kinds for impls on custom types.
523 query coerce_unsized_info(key: DefId)
524 -> ty::adjustment::CoerceUnsizedInfo {
525 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
530 query typeck_item_bodies(_: CrateNum) -> () {
531 desc { "type-checking all item bodies" }
534 query typeck_tables_of(key: LocalDefId) -> &'tcx ty::TypeckTables<'tcx> {
535 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
536 cache_on_disk_if { true }
538 query diagnostic_only_typeck_tables_of(key: LocalDefId) -> &'tcx ty::TypeckTables<'tcx> {
539 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
540 cache_on_disk_if { true }
541 load_cached(tcx, id) {
542 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
543 .queries.on_disk_cache
544 .try_load_query_result(tcx, id);
546 typeck_tables.map(|x| &*tcx.arena.alloc(x))
552 query used_trait_imports(key: LocalDefId) -> &'tcx FxHashSet<LocalDefId> {
553 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
554 cache_on_disk_if { true }
559 query has_typeck_tables(def_id: DefId) -> bool {
560 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
563 query coherent_trait(def_id: DefId) -> () {
564 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
569 /// Borrow-checks the function body. If this is a closure, returns
570 /// additional requirements that the closure's creator must verify.
571 query mir_borrowck(key: LocalDefId) -> mir::BorrowCheckResult<'tcx> {
572 storage(ArenaCacheSelector<'tcx>)
573 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
574 cache_on_disk_if(tcx, opt_result) {
575 tcx.is_closure(key.to_def_id())
576 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
582 /// Gets a complete map from all types to their inherent impls.
583 /// Not meant to be used directly outside of coherence.
584 /// (Defined only for `LOCAL_CRATE`.)
585 query crate_inherent_impls(k: CrateNum)
586 -> CrateInherentImpls {
587 storage(ArenaCacheSelector<'tcx>)
589 desc { "all inherent impls defined in crate `{:?}`", k }
592 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
593 /// Not meant to be used directly outside of coherence.
594 /// (Defined only for `LOCAL_CRATE`.)
595 query crate_inherent_impls_overlap_check(_: CrateNum)
598 desc { "check for overlap between inherent impls defined in this crate" }
603 /// Evaluates a constant without running sanity checks.
605 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
606 /// during validation. Please add a comment to every use site explaining why using
607 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
608 /// form to be used outside of const eval.
609 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
610 -> ConstEvalRawResult<'tcx> {
612 "const-evaluating `{}`",
613 tcx.def_path_str(key.value.instance.def.def_id())
617 /// Results of evaluating const items or constants embedded in
618 /// other items (such as enum variant explicit discriminants).
620 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
621 /// returns a proper constant that is usable by the rest of the compiler.
623 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
624 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
625 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
626 -> ConstEvalResult<'tcx> {
628 "const-evaluating + checking `{}`",
629 tcx.def_path_str(key.value.instance.def.def_id())
631 cache_on_disk_if(_, opt_result) {
632 // Only store results without errors
633 opt_result.map_or(true, |r| r.is_ok())
637 /// Destructure a constant ADT or array into its variant index and its
639 query destructure_const(
640 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
641 ) -> mir::DestructuredConst<'tcx> {
642 desc { "destructure constant" }
645 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
646 desc { "get a &core::panic::Location referring to a span" }
650 key: LitToConstInput<'tcx>
651 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
652 desc { "converting literal to const" }
657 query check_match(key: DefId) {
658 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
659 cache_on_disk_if { key.is_local() }
662 /// Performs part of the privacy check and computes "access levels".
663 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
665 desc { "privacy access levels" }
667 query check_private_in_public(_: CrateNum) -> () {
669 desc { "checking for private elements in public interfaces" }
674 query reachable_set(_: CrateNum) -> &'tcx HirIdSet {
675 desc { "reachability" }
678 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
679 /// in the case of closures, this will be redirected to the enclosing function.
680 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
681 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
684 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
685 storage(ArenaCacheSelector<'tcx>)
686 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
689 /// The `symbol_name` query provides the symbol name for calling a
690 /// given instance from the local crate. In particular, it will also
691 /// look up the correct symbol name of instances from upstream crates.
692 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
693 desc { "computing the symbol for `{}`", key }
694 cache_on_disk_if { true }
697 query def_kind(def_id: DefId) -> DefKind {
698 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
700 query def_span(def_id: DefId) -> Span {
701 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
702 // FIXME(mw): DefSpans are not really inputs since they are derived from
703 // HIR. But at the moment HIR hashing still contains some hacks that allow
704 // to make type debuginfo to be source location independent. Declaring
705 // DefSpan an input makes sure that changes to these are always detected
706 // regardless of HIR hashing.
709 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
710 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
712 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
713 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
715 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
716 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
718 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
719 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
724 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
725 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
726 storage(ArenaCacheSelector<'tcx>)
727 cache_on_disk_if { true }
732 query fn_arg_names(def_id: DefId) -> &'tcx [Symbol] {
733 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
735 /// Gets the rendered value of the specified constant or associated constant.
737 query rendered_const(def_id: DefId) -> String {
738 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
740 query impl_parent(def_id: DefId) -> Option<DefId> {
741 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
746 query trait_of_item(def_id: DefId) -> Option<DefId> {
747 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
752 query is_mir_available(key: DefId) -> bool {
753 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
758 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
759 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
760 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
765 query codegen_fulfill_obligation(
766 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
767 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
768 cache_on_disk_if { true }
770 "checking if `{}` fulfills its obligations",
771 tcx.def_path_str(key.1.def_id())
777 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
778 desc { "local trait impls" }
780 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
781 storage(ArenaCacheSelector<'tcx>)
782 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
784 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
785 storage(ArenaCacheSelector<'tcx>)
786 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
787 cache_on_disk_if { true }
789 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
790 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
793 /// Gets the ParameterEnvironment for a given item; this environment
794 /// will be in "user-facing" mode, meaning that it is suitable for
795 /// type-checking etc, and it does not normalize specializable
796 /// associated types. This is almost always what you want,
797 /// unless you are doing MIR optimizations, in which case you
798 /// might want to use `reveal_all()` method to change modes.
799 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
800 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
803 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
804 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
805 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
806 desc { "computing whether `{}` is `Copy`", env.value }
808 /// Query backing `TyS::is_sized`.
809 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
810 desc { "computing whether `{}` is `Sized`", env.value }
812 /// Query backing `TyS::is_freeze`.
813 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
814 desc { "computing whether `{}` is freeze", env.value }
816 /// Query backing `TyS::needs_drop`.
817 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
818 desc { "computing whether `{}` needs drop", env.value }
821 /// Query backing `TyS::is_structural_eq_shallow`.
823 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
825 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
827 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
832 /// A list of types where the ADT requires drop if and only if any of
833 /// those types require drop. If the ADT is known to always need drop
834 /// then `Err(AlwaysRequiresDrop)` is returned.
835 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
836 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
837 cache_on_disk_if { true }
841 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
842 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
843 desc { "computing layout of `{}`", env.value }
848 query dylib_dependency_formats(_: CrateNum)
849 -> &'tcx [(CrateNum, LinkagePreference)] {
850 desc { "dylib dependency formats of crate" }
853 query dependency_formats(_: CrateNum)
854 -> Lrc<crate::middle::dependency_format::Dependencies>
856 desc { "get the linkage format of all dependencies" }
861 query is_compiler_builtins(_: CrateNum) -> bool {
863 desc { "checking if the crate is_compiler_builtins" }
865 query has_global_allocator(_: CrateNum) -> bool {
867 desc { "checking if the crate has_global_allocator" }
869 query has_panic_handler(_: CrateNum) -> bool {
871 desc { "checking if the crate has_panic_handler" }
873 query is_profiler_runtime(_: CrateNum) -> bool {
875 desc { "query a crate is `#![profiler_runtime]`" }
877 query panic_strategy(_: CrateNum) -> PanicStrategy {
879 desc { "query a crate's configured panic strategy" }
881 query is_no_builtins(_: CrateNum) -> bool {
883 desc { "test whether a crate has `#![no_builtins]`" }
885 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
887 desc { "query a crate's symbol mangling version" }
890 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
892 desc { "getting crate's ExternCrateData" }
897 query specializes(_: (DefId, DefId)) -> bool {
898 desc { "computing whether impls specialize one another" }
900 query in_scope_traits_map(_: LocalDefId)
901 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
903 desc { "traits in scope at a block" }
908 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
909 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
915 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
916 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
919 query check_item_well_formed(key: LocalDefId) -> () {
920 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
922 query check_trait_item_well_formed(key: LocalDefId) -> () {
923 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
925 query check_impl_item_well_formed(key: LocalDefId) -> () {
926 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
932 // The `DefId`s of all non-generic functions and statics in the given crate
933 // that can be reached from outside the crate.
935 // We expect this items to be available for being linked to.
937 // This query can also be called for `LOCAL_CRATE`. In this case it will
938 // compute which items will be reachable to other crates, taking into account
939 // the kind of crate that is currently compiled. Crates with only a
940 // C interface have fewer reachable things.
942 // Does not include external symbols that don't have a corresponding DefId,
943 // like the compiler-generated `main` function and so on.
944 query reachable_non_generics(_: CrateNum)
945 -> DefIdMap<SymbolExportLevel> {
946 storage(ArenaCacheSelector<'tcx>)
947 desc { "looking up the exported symbols of a crate" }
949 query is_reachable_non_generic(def_id: DefId) -> bool {
950 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
952 query is_unreachable_local_definition(def_id: DefId) -> bool {
954 "checking whether `{}` is reachable from outside the crate",
955 tcx.def_path_str(def_id),
961 /// The entire set of monomorphizations the local crate can safely link
962 /// to because they are exported from upstream crates. Do not depend on
963 /// this directly, as its value changes anytime a monomorphization gets
964 /// added or removed in any upstream crate. Instead use the narrower
965 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
966 /// better, `Instance::upstream_monomorphization()`.
967 query upstream_monomorphizations(
969 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
970 storage(ArenaCacheSelector<'tcx>)
971 desc { "collecting available upstream monomorphizations `{:?}`", k }
974 /// Returns the set of upstream monomorphizations available for the
975 /// generic function identified by the given `def_id`. The query makes
976 /// sure to make a stable selection if the same monomorphization is
977 /// available in multiple upstream crates.
979 /// You likely want to call `Instance::upstream_monomorphization()`
980 /// instead of invoking this query directly.
981 query upstream_monomorphizations_for(def_id: DefId)
982 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
984 "collecting available upstream monomorphizations for `{}`",
985 tcx.def_path_str(def_id),
989 /// Returns the upstream crate that exports drop-glue for the given
990 /// type (`substs` is expected to be a single-item list containing the
991 /// type one wants drop-glue for).
993 /// This is a subset of `upstream_monomorphizations_for` in order to
994 /// increase dep-tracking granularity. Otherwise adding or removing any
995 /// type with drop-glue in any upstream crate would invalidate all
996 /// functions calling drop-glue of an upstream type.
998 /// You likely want to call `Instance::upstream_monomorphization()`
999 /// instead of invoking this query directly.
1001 /// NOTE: This query could easily be extended to also support other
1002 /// common functions that have are large set of monomorphizations
1003 /// (like `Clone::clone` for example).
1004 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
1005 desc { "available upstream drop-glue for `{:?}`", substs }
1010 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
1011 desc { "looking up the foreign modules of a linked crate" }
1014 /// Identifies the entry-point (e.g., the `main` function) for a given
1015 /// crate, returning `None` if there is no entry point (such as for library crates).
1016 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1017 desc { "looking up the entry function of a crate" }
1019 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1020 desc { "looking up the plugin registrar for a crate" }
1022 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1023 desc { "looking up the derive registrar for a crate" }
1025 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1027 desc { "looking up the disambiguator a crate" }
1029 query crate_hash(_: CrateNum) -> Svh {
1031 desc { "looking up the hash a crate" }
1033 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1035 desc { "looking up the hash of a host version of a crate" }
1037 query original_crate_name(_: CrateNum) -> Symbol {
1039 desc { "looking up the original name a crate" }
1041 query extra_filename(_: CrateNum) -> String {
1043 desc { "looking up the extra filename for a crate" }
1048 query implementations_of_trait(_: (CrateNum, DefId))
1050 desc { "looking up implementations of a trait in a crate" }
1052 query all_trait_implementations(_: CrateNum)
1054 desc { "looking up all (?) trait implementations" }
1059 query dllimport_foreign_items(_: CrateNum)
1060 -> FxHashSet<DefId> {
1061 storage(ArenaCacheSelector<'tcx>)
1062 desc { "dllimport_foreign_items" }
1064 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1065 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1067 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1068 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1070 query native_library_kind(def_id: DefId)
1071 -> Option<NativeLibKind> {
1072 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1077 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1079 desc { "looking up link arguments for a crate" }
1084 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1085 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1086 storage(ArenaCacheSelector<'tcx>)
1087 desc { "resolving lifetimes" }
1089 query named_region_map(_: LocalDefId) ->
1090 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1091 desc { "looking up a named region" }
1093 query is_late_bound_map(_: LocalDefId) ->
1094 Option<&'tcx FxHashSet<ItemLocalId>> {
1095 desc { "testing if a region is late bound" }
1097 query object_lifetime_defaults_map(_: LocalDefId)
1098 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1099 desc { "looking up lifetime defaults for a region" }
1104 query visibility(def_id: DefId) -> ty::Visibility {
1105 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1110 query dep_kind(_: CrateNum) -> DepKind {
1112 desc { "fetching what a dependency looks like" }
1114 query crate_name(_: CrateNum) -> Symbol {
1116 desc { "fetching what a crate is named" }
1118 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1119 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1121 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1122 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1125 query get_lib_features(_: CrateNum) -> LibFeatures {
1126 storage(ArenaCacheSelector<'tcx>)
1128 desc { "calculating the lib features map" }
1130 query defined_lib_features(_: CrateNum)
1131 -> &'tcx [(Symbol, Option<Symbol>)] {
1132 desc { "calculating the lib features defined in a crate" }
1134 /// Returns the lang items defined in another crate by loading it from metadata.
1135 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1136 // of that argument?
1137 query get_lang_items(_: CrateNum) -> LanguageItems {
1138 storage(ArenaCacheSelector<'tcx>)
1140 desc { "calculating the lang items map" }
1143 /// Returns all diagnostic items defined in all crates.
1144 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1145 storage(ArenaCacheSelector<'tcx>)
1147 desc { "calculating the diagnostic items map" }
1150 /// Returns the lang items defined in another crate by loading it from metadata.
1151 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1152 desc { "calculating the lang items defined in a crate" }
1155 /// Returns the diagnostic items defined in a crate.
1156 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1157 storage(ArenaCacheSelector<'tcx>)
1158 desc { "calculating the diagnostic items map in a crate" }
1161 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1162 desc { "calculating the missing lang items in a crate" }
1164 query visible_parent_map(_: CrateNum)
1165 -> DefIdMap<DefId> {
1166 storage(ArenaCacheSelector<'tcx>)
1167 desc { "calculating the visible parent map" }
1169 query missing_extern_crate_item(_: CrateNum) -> bool {
1171 desc { "seeing if we're missing an `extern crate` item for this crate" }
1173 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1175 desc { "looking at the source for a crate" }
1177 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1179 desc { "generating a postorder list of CrateNums" }
1182 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1183 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1186 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1188 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1190 query maybe_unused_extern_crates(_: CrateNum)
1191 -> &'tcx [(LocalDefId, Span)] {
1193 desc { "looking up all possibly unused extern crates" }
1195 query names_imported_by_glob_use(def_id: LocalDefId)
1196 -> &'tcx FxHashSet<Symbol> {
1198 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1201 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1202 storage(ArenaCacheSelector<'tcx>)
1204 desc { "calculating the stability index for the local crate" }
1206 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1208 desc { "fetching all foreign CrateNum instances" }
1211 /// A vector of every trait accessible in the whole crate
1212 /// (i.e., including those from subcrates). This is used only for
1213 /// error reporting.
1214 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1215 desc { "fetching all foreign and local traits" }
1220 /// The list of symbols exported from the given crate.
1222 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1223 /// correspond to a publicly visible symbol in `cnum` machine code.
1224 /// - The `exported_symbols` sets of different crates do not intersect.
1225 query exported_symbols(_: CrateNum)
1226 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1227 desc { "exported_symbols" }
1232 query collect_and_partition_mono_items(_: CrateNum)
1233 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1235 desc { "collect_and_partition_mono_items" }
1237 query is_codegened_item(def_id: DefId) -> bool {
1238 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1240 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1241 desc { "codegen_unit" }
1243 query backend_optimization_level(_: CrateNum) -> OptLevel {
1244 desc { "optimization level used by backend" }
1249 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1251 desc { "output_filenames" }
1256 /// Do not call this query directly: invoke `normalize` instead.
1257 query normalize_projection_ty(
1258 goal: CanonicalProjectionGoal<'tcx>
1260 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1263 desc { "normalizing `{:?}`", goal }
1266 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1267 query normalize_generic_arg_after_erasing_regions(
1268 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1269 ) -> GenericArg<'tcx> {
1270 desc { "normalizing `{}`", goal.value }
1273 query implied_outlives_bounds(
1274 goal: CanonicalTyGoal<'tcx>
1276 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1279 desc { "computing implied outlives bounds for `{:?}`", goal }
1282 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1283 query dropck_outlives(
1284 goal: CanonicalTyGoal<'tcx>
1286 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1289 desc { "computing dropck types for `{:?}`", goal }
1292 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1293 /// `infcx.predicate_must_hold()` instead.
1294 query evaluate_obligation(
1295 goal: CanonicalPredicateGoal<'tcx>
1296 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1297 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1300 query evaluate_goal(
1301 goal: traits::ChalkCanonicalGoal<'tcx>
1303 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1306 desc { "evaluating trait selection obligation `{}`", goal.value }
1309 query type_implements_trait(
1310 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1312 desc { "evaluating `type_implements_trait` `{:?}`", key }
1315 /// Do not call this query directly: part of the `Eq` type-op
1316 query type_op_ascribe_user_type(
1317 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1319 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1322 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1325 /// Do not call this query directly: part of the `Eq` type-op
1327 goal: CanonicalTypeOpEqGoal<'tcx>
1329 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1332 desc { "evaluating `type_op_eq` `{:?}`", goal }
1335 /// Do not call this query directly: part of the `Subtype` type-op
1336 query type_op_subtype(
1337 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1339 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1342 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1345 /// Do not call this query directly: part of the `ProvePredicate` type-op
1346 query type_op_prove_predicate(
1347 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1349 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1352 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1355 /// Do not call this query directly: part of the `Normalize` type-op
1356 query type_op_normalize_ty(
1357 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1359 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1362 desc { "normalizing `{:?}`", goal }
1365 /// Do not call this query directly: part of the `Normalize` type-op
1366 query type_op_normalize_predicate(
1367 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1369 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1372 desc { "normalizing `{:?}`", goal }
1375 /// Do not call this query directly: part of the `Normalize` type-op
1376 query type_op_normalize_poly_fn_sig(
1377 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1379 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1382 desc { "normalizing `{:?}`", goal }
1385 /// Do not call this query directly: part of the `Normalize` type-op
1386 query type_op_normalize_fn_sig(
1387 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1389 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1392 desc { "normalizing `{:?}`", goal }
1395 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1397 "testing substituted normalized predicates:`{}`",
1398 tcx.def_path_str(key.0)
1402 query method_autoderef_steps(
1403 goal: CanonicalTyGoal<'tcx>
1404 ) -> MethodAutoderefStepsResult<'tcx> {
1405 desc { "computing autoderef types for `{:?}`", goal }
1410 query target_features_whitelist(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1411 storage(ArenaCacheSelector<'tcx>)
1413 desc { "looking up the whitelist of target features" }
1416 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1417 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1419 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1422 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1424 desc { "looking up enabled feature gates" }
1427 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1428 /// given generics args (`SubstsRef`), returning one of:
1429 /// * `Ok(Some(instance))` on success
1430 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1431 /// and therefore don't allow finding the final `Instance`
1432 /// * `Err(ErrorReported)` when the `Instance` resolution process
1433 /// couldn't complete due to errors elsewhere - this is distinct
1434 /// from `Ok(None)` to avoid misleading diagnostics when an error
1435 /// has already been/will be emitted, for the original cause
1436 query resolve_instance(
1437 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1438 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1439 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }