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 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLib>> {
137 desc { "looking up the native libraries of a linked crate" }
140 query lint_levels(_: CrateNum) -> LintLevelMap {
141 storage(ArenaCacheSelector<'tcx>)
143 desc { "computing the lint levels for items in this crate" }
146 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
148 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
153 query is_panic_runtime(_: CrateNum) -> bool {
155 desc { "checking if the crate is_panic_runtime" }
160 /// Set of all the `DefId`s in this crate that have MIR associated with
161 /// them. This includes all the body owners, but also things like struct
163 query mir_keys(_: CrateNum) -> FxHashSet<LocalDefId> {
164 storage(ArenaCacheSelector<'tcx>)
165 desc { "getting a list of all mir_keys" }
168 /// Maps DefId's that have an associated `mir::Body` to the result
169 /// of the MIR const-checking pass. This is the set of qualifs in
170 /// the final value of a `const`.
171 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
172 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
173 cache_on_disk_if { key.is_local() }
176 /// Fetch the MIR for a given `DefId` right after it's built - this includes
177 /// unreachable code.
178 query mir_built(key: LocalDefId) -> Steal<mir::Body<'tcx>> {
179 storage(ArenaCacheSelector<'tcx>)
180 desc { |tcx| "building MIR for `{}`", tcx.def_path_str(key.to_def_id()) }
183 /// Fetch the MIR for a given `DefId` up till the point where it is
184 /// ready for const qualification.
186 /// See the README for the `mir` module for details.
187 query mir_const(key: DefId) -> Steal<mir::Body<'tcx>> {
188 desc { |tcx| "processing MIR for `{}`", tcx.def_path_str(key) }
189 storage(ArenaCacheSelector<'tcx>)
193 query mir_drops_elaborated_and_const_checked(key: LocalDefId) -> Steal<mir::Body<'tcx>> {
194 storage(ArenaCacheSelector<'tcx>)
196 desc { |tcx| "elaborating drops for `{}`", tcx.def_path_str(key.to_def_id()) }
199 query mir_validated(key: LocalDefId) ->
201 Steal<mir::Body<'tcx>>,
202 Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
204 storage(ArenaCacheSelector<'tcx>)
206 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
209 /// MIR after our optimization passes have run. This is MIR that is ready
210 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
211 query optimized_mir(key: DefId) -> mir::Body<'tcx> {
212 desc { |tcx| "optimizing MIR for `{}`", tcx.def_path_str(key) }
213 storage(ArenaCacheSelector<'tcx>)
214 cache_on_disk_if { key.is_local() }
217 query coverage_data(key: DefId) -> Option<mir::CoverageData> {
218 desc { |tcx| "retrieving coverage data from MIR for `{}`", tcx.def_path_str(key) }
219 storage(ArenaCacheSelector<'tcx>)
220 cache_on_disk_if { key.is_local() }
223 query promoted_mir(key: DefId) -> IndexVec<mir::Promoted, mir::Body<'tcx>> {
224 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
225 storage(ArenaCacheSelector<'tcx>)
226 cache_on_disk_if { key.is_local() }
231 // Erases regions from `ty` to yield a new type.
232 // Normally you would just use `tcx.erase_regions(&value)`,
233 // however, which uses this query as a kind of cache.
234 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
235 // This query is not expected to have input -- as a result, it
236 // is not a good candidates for "replay" because it is essentially a
237 // pure function of its input (and hence the expectation is that
238 // no caller would be green **apart** from just these
239 // queries). Making it anonymous avoids hashing the result, which
240 // may save a bit of time.
242 desc { "erasing regions from `{:?}`", ty }
247 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
248 storage(ArenaCacheSelector<'tcx>)
249 desc { "wasm import module map" }
254 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
255 /// predicates (where-clauses) directly defined on it. This is
256 /// equal to the `explicit_predicates_of` predicates plus the
257 /// `inferred_outlives_of` predicates.
258 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
259 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
262 /// Returns the predicates written explicitly by the user.
263 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
264 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
267 /// Returns the inferred outlives predicates (e.g., for `struct
268 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
269 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
270 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
273 /// Maps from the `DefId` of a trait to the list of
274 /// super-predicates. This is a subset of the full list of
275 /// predicates. We store these in a separate map because we must
276 /// evaluate them even during type conversion, often before the
277 /// full predicates are available (note that supertraits have
278 /// additional acyclicity requirements).
279 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
280 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
283 /// To avoid cycles within the predicates of a single item we compute
284 /// per-type-parameter predicates for resolving `T::AssocTy`.
285 query type_param_predicates(key: (DefId, LocalDefId)) -> ty::GenericPredicates<'tcx> {
286 desc { |tcx| "computing the bounds for type parameter `{}`", {
287 let id = tcx.hir().as_local_hir_id(key.1);
288 tcx.hir().ty_param_name(id)
292 query trait_def(key: DefId) -> ty::TraitDef {
293 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
294 storage(ArenaCacheSelector<'tcx>)
296 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
297 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
299 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
300 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
303 // The cycle error here should be reported as an error by `check_representable`.
304 // We consider the type as Sized in the meanwhile to avoid
305 // further errors (done in impl Value for AdtSizedConstraint).
306 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
307 // in case we accidentally otherwise don't emit an error.
308 query adt_sized_constraint(
310 ) -> AdtSizedConstraint<'tcx> {
311 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
315 query adt_dtorck_constraint(
317 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
318 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
321 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
322 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
323 /// not have the feature gate active).
325 /// **Do not call this function manually.** It is only meant to cache the base data for the
326 /// `is_const_fn` function.
327 query is_const_fn_raw(key: DefId) -> bool {
328 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
331 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
333 /// This query caches the base data for the `is_const_impl` helper function, which also
334 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
335 query is_const_impl_raw(key: DefId) -> bool {
336 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
339 query asyncness(key: DefId) -> hir::IsAsync {
340 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
343 /// Returns `true` if calls to the function may be promoted.
345 /// This is either because the function is e.g., a tuple-struct or tuple-variant
346 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
347 /// be removed in the future in favour of some form of check which figures out whether the
348 /// function does not inspect the bits of any of its arguments (so is essentially just a
349 /// constructor function).
350 query is_promotable_const_fn(key: DefId) -> bool {
351 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
354 query const_fn_is_allowed_fn_ptr(key: DefId) -> bool {
355 desc { |tcx| "checking if const fn allows `fn()` types: `{}`", tcx.def_path_str(key) }
358 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
359 query is_foreign_item(key: DefId) -> bool {
360 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
363 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
364 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
365 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
368 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
369 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
370 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
373 /// Gets a map with the variance of every item; use `item_variance` instead.
374 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
375 storage(ArenaCacheSelector<'tcx>)
376 desc { "computing the variances for items in this crate" }
379 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
380 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
381 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
386 /// Maps from thee `DefId` of a type to its (inferred) outlives.
387 query inferred_outlives_crate(_: CrateNum)
388 -> ty::CratePredicatesMap<'tcx> {
389 storage(ArenaCacheSelector<'tcx>)
390 desc { "computing the inferred outlives predicates for items in this crate" }
395 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
396 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
397 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
400 /// Maps from a trait item to the trait item "descriptor".
401 query associated_item(key: DefId) -> ty::AssocItem {
402 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
403 storage(ArenaCacheSelector<'tcx>)
406 /// Collects the associated items defined on a trait or impl.
407 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
408 storage(ArenaCacheSelector<'tcx>)
409 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
412 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
413 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
415 query impl_polarity(key: DefId) -> ty::ImplPolarity {
416 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
419 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
420 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
425 /// Maps a `DefId` of a type to a list of its inherent impls.
426 /// Contains implementations of methods that are inherent to a type.
427 /// Methods in these implementations don't need to be exported.
428 query inherent_impls(key: DefId) -> &'tcx [DefId] {
429 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
435 /// The result of unsafety-checking this `DefId`.
436 query unsafety_check_result(key: LocalDefId) -> mir::UnsafetyCheckResult {
437 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
438 cache_on_disk_if { true }
439 storage(ArenaCacheSelector<'tcx>)
442 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
444 /// Unsafety checking is executed for each method separately, but we only want
445 /// to emit this error once per derive. As there are some impls with multiple
446 /// methods, we use a query for deduplication.
447 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
448 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
451 /// The signature of functions.
452 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
453 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
458 query lint_mod(key: LocalDefId) -> () {
459 desc { |tcx| "linting {}", describe_as_module(key.to_def_id(), tcx) }
462 /// Checks the attributes in the module.
463 query check_mod_attrs(key: DefId) -> () {
464 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
467 query check_mod_unstable_api_usage(key: DefId) -> () {
468 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
471 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
472 query check_mod_const_bodies(key: DefId) -> () {
473 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
476 /// Checks the loops in the module.
477 query check_mod_loops(key: DefId) -> () {
478 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
481 query check_mod_item_types(key: DefId) -> () {
482 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
485 query check_mod_privacy(key: LocalDefId) -> () {
486 desc { |tcx| "checking privacy in {}", describe_as_module(key.to_def_id(), tcx) }
489 query check_mod_intrinsics(key: DefId) -> () {
490 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
493 query check_mod_liveness(key: DefId) -> () {
494 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
497 query check_mod_impl_wf(key: DefId) -> () {
498 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
501 query collect_mod_item_types(key: DefId) -> () {
502 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
505 /// Caches `CoerceUnsized` kinds for impls on custom types.
506 query coerce_unsized_info(key: DefId)
507 -> ty::adjustment::CoerceUnsizedInfo {
508 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
513 query typeck_item_bodies(_: CrateNum) -> () {
514 desc { "type-checking all item bodies" }
517 query typeck_tables_of(key: LocalDefId) -> &'tcx ty::TypeckTables<'tcx> {
518 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
519 cache_on_disk_if { true }
521 query diagnostic_only_typeck_tables_of(key: LocalDefId) -> &'tcx ty::TypeckTables<'tcx> {
522 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
523 cache_on_disk_if { true }
524 load_cached(tcx, id) {
525 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
526 .queries.on_disk_cache
527 .try_load_query_result(tcx, id);
529 typeck_tables.map(|x| &*tcx.arena.alloc(x))
535 query used_trait_imports(key: LocalDefId) -> &'tcx DefIdSet {
536 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
537 cache_on_disk_if { true }
542 query has_typeck_tables(def_id: DefId) -> bool {
543 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
546 query coherent_trait(def_id: DefId) -> () {
547 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
552 /// Borrow-checks the function body. If this is a closure, returns
553 /// additional requirements that the closure's creator must verify.
554 query mir_borrowck(key: LocalDefId) -> mir::BorrowCheckResult<'tcx> {
555 storage(ArenaCacheSelector<'tcx>)
556 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
557 cache_on_disk_if(tcx, opt_result) {
558 tcx.is_closure(key.to_def_id())
559 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
565 /// Gets a complete map from all types to their inherent impls.
566 /// Not meant to be used directly outside of coherence.
567 /// (Defined only for `LOCAL_CRATE`.)
568 query crate_inherent_impls(k: CrateNum)
569 -> CrateInherentImpls {
570 storage(ArenaCacheSelector<'tcx>)
572 desc { "all inherent impls defined in crate `{:?}`", k }
575 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
576 /// Not meant to be used directly outside of coherence.
577 /// (Defined only for `LOCAL_CRATE`.)
578 query crate_inherent_impls_overlap_check(_: CrateNum)
581 desc { "check for overlap between inherent impls defined in this crate" }
586 /// Evaluates a constant without running sanity checks.
588 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
589 /// during validation. Please add a comment to every use site explaining why using
590 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
591 /// form to be used outside of const eval.
592 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
593 -> ConstEvalRawResult<'tcx> {
595 "const-evaluating `{}`",
596 tcx.def_path_str(key.value.instance.def.def_id())
600 /// Results of evaluating const items or constants embedded in
601 /// other items (such as enum variant explicit discriminants).
603 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
604 /// returns a proper constant that is usable by the rest of the compiler.
606 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
607 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
608 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
609 -> ConstEvalResult<'tcx> {
611 "const-evaluating + checking `{}`",
612 tcx.def_path_str(key.value.instance.def.def_id())
614 cache_on_disk_if(_, opt_result) {
615 // Only store results without errors
616 opt_result.map_or(true, |r| r.is_ok())
620 /// Destructure a constant ADT or array into its variant index and its
622 query destructure_const(
623 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
624 ) -> mir::DestructuredConst<'tcx> {
625 desc { "destructure constant" }
628 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
629 desc { "get a &core::panic::Location referring to a span" }
633 key: LitToConstInput<'tcx>
634 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
635 desc { "converting literal to const" }
640 query check_match(key: DefId) {
641 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
642 cache_on_disk_if { key.is_local() }
645 /// Performs part of the privacy check and computes "access levels".
646 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
648 desc { "privacy access levels" }
650 query check_private_in_public(_: CrateNum) -> () {
652 desc { "checking for private elements in public interfaces" }
657 query reachable_set(_: CrateNum) -> &'tcx HirIdSet {
658 desc { "reachability" }
661 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
662 /// in the case of closures, this will be redirected to the enclosing function.
663 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
664 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
667 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
668 storage(ArenaCacheSelector<'tcx>)
669 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
672 /// The `symbol_name` query provides the symbol name for calling a
673 /// given instance from the local crate. In particular, it will also
674 /// look up the correct symbol name of instances from upstream crates.
675 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
676 desc { "computing the symbol for `{}`", key }
677 cache_on_disk_if { true }
680 query def_kind(def_id: DefId) -> DefKind {
681 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
683 query def_span(def_id: DefId) -> Span {
684 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
685 // FIXME(mw): DefSpans are not really inputs since they are derived from
686 // HIR. But at the moment HIR hashing still contains some hacks that allow
687 // to make type debuginfo to be source location independent. Declaring
688 // DefSpan an input makes sure that changes to these are always detected
689 // regardless of HIR hashing.
692 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
693 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
695 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
696 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
698 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
699 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
701 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
702 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
707 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
708 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
709 storage(ArenaCacheSelector<'tcx>)
710 cache_on_disk_if { true }
715 query fn_arg_names(def_id: DefId) -> &'tcx [rustc_span::symbol::Ident] {
716 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
718 /// Gets the rendered value of the specified constant or associated constant.
720 query rendered_const(def_id: DefId) -> String {
721 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
723 query impl_parent(def_id: DefId) -> Option<DefId> {
724 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
729 query trait_of_item(def_id: DefId) -> Option<DefId> {
730 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
735 query is_mir_available(key: DefId) -> bool {
736 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
741 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
742 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
743 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
748 query codegen_fulfill_obligation(
749 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
750 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
751 cache_on_disk_if { true }
753 "checking if `{}` fulfills its obligations",
754 tcx.def_path_str(key.1.def_id())
760 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
761 desc { "local trait impls" }
763 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
764 storage(ArenaCacheSelector<'tcx>)
765 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
767 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
768 storage(ArenaCacheSelector<'tcx>)
769 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
770 cache_on_disk_if { true }
772 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
773 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
776 /// Gets the ParameterEnvironment for a given item; this environment
777 /// will be in "user-facing" mode, meaning that it is suitable for
778 /// type-checking etc, and it does not normalize specializable
779 /// associated types. This is almost always what you want,
780 /// unless you are doing MIR optimizations, in which case you
781 /// might want to use `reveal_all()` method to change modes.
782 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
783 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
786 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
787 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
788 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
789 desc { "computing whether `{}` is `Copy`", env.value }
791 /// Query backing `TyS::is_sized`.
792 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
793 desc { "computing whether `{}` is `Sized`", env.value }
795 /// Query backing `TyS::is_freeze`.
796 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
797 desc { "computing whether `{}` is freeze", env.value }
799 /// Query backing `TyS::needs_drop`.
800 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
801 desc { "computing whether `{}` needs drop", env.value }
804 /// Query backing `TyS::is_structural_eq_shallow`.
806 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
808 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
810 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
815 /// A list of types where the ADT requires drop if and only if any of
816 /// those types require drop. If the ADT is known to always need drop
817 /// then `Err(AlwaysRequiresDrop)` is returned.
818 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
819 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
820 cache_on_disk_if { true }
824 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
825 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
826 desc { "computing layout of `{}`", env.value }
831 query dylib_dependency_formats(_: CrateNum)
832 -> &'tcx [(CrateNum, LinkagePreference)] {
833 desc { "dylib dependency formats of crate" }
836 query dependency_formats(_: CrateNum)
837 -> Lrc<crate::middle::dependency_format::Dependencies>
839 desc { "get the linkage format of all dependencies" }
844 query is_compiler_builtins(_: CrateNum) -> bool {
846 desc { "checking if the crate is_compiler_builtins" }
848 query has_global_allocator(_: CrateNum) -> bool {
850 desc { "checking if the crate has_global_allocator" }
852 query has_panic_handler(_: CrateNum) -> bool {
854 desc { "checking if the crate has_panic_handler" }
856 query is_profiler_runtime(_: CrateNum) -> bool {
858 desc { "query a crate is `#![profiler_runtime]`" }
860 query panic_strategy(_: CrateNum) -> PanicStrategy {
862 desc { "query a crate's configured panic strategy" }
864 query is_no_builtins(_: CrateNum) -> bool {
866 desc { "test whether a crate has `#![no_builtins]`" }
868 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
870 desc { "query a crate's symbol mangling version" }
873 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
875 desc { "getting crate's ExternCrateData" }
880 query specializes(_: (DefId, DefId)) -> bool {
881 desc { "computing whether impls specialize one another" }
883 query in_scope_traits_map(_: LocalDefId)
884 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
886 desc { "traits in scope at a block" }
891 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
892 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
898 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
899 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
902 query check_item_well_formed(key: LocalDefId) -> () {
903 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
905 query check_trait_item_well_formed(key: LocalDefId) -> () {
906 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
908 query check_impl_item_well_formed(key: LocalDefId) -> () {
909 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
915 // The `DefId`s of all non-generic functions and statics in the given crate
916 // that can be reached from outside the crate.
918 // We expect this items to be available for being linked to.
920 // This query can also be called for `LOCAL_CRATE`. In this case it will
921 // compute which items will be reachable to other crates, taking into account
922 // the kind of crate that is currently compiled. Crates with only a
923 // C interface have fewer reachable things.
925 // Does not include external symbols that don't have a corresponding DefId,
926 // like the compiler-generated `main` function and so on.
927 query reachable_non_generics(_: CrateNum)
928 -> DefIdMap<SymbolExportLevel> {
929 storage(ArenaCacheSelector<'tcx>)
930 desc { "looking up the exported symbols of a crate" }
932 query is_reachable_non_generic(def_id: DefId) -> bool {
933 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
935 query is_unreachable_local_definition(def_id: DefId) -> bool {
937 "checking whether `{}` is reachable from outside the crate",
938 tcx.def_path_str(def_id),
944 /// The entire set of monomorphizations the local crate can safely link
945 /// to because they are exported from upstream crates. Do not depend on
946 /// this directly, as its value changes anytime a monomorphization gets
947 /// added or removed in any upstream crate. Instead use the narrower
948 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
949 /// better, `Instance::upstream_monomorphization()`.
950 query upstream_monomorphizations(
952 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
953 storage(ArenaCacheSelector<'tcx>)
954 desc { "collecting available upstream monomorphizations `{:?}`", k }
957 /// Returns the set of upstream monomorphizations available for the
958 /// generic function identified by the given `def_id`. The query makes
959 /// sure to make a stable selection if the same monomorphization is
960 /// available in multiple upstream crates.
962 /// You likely want to call `Instance::upstream_monomorphization()`
963 /// instead of invoking this query directly.
964 query upstream_monomorphizations_for(def_id: DefId)
965 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
967 "collecting available upstream monomorphizations for `{}`",
968 tcx.def_path_str(def_id),
972 /// Returns the upstream crate that exports drop-glue for the given
973 /// type (`substs` is expected to be a single-item list containing the
974 /// type one wants drop-glue for).
976 /// This is a subset of `upstream_monomorphizations_for` in order to
977 /// increase dep-tracking granularity. Otherwise adding or removing any
978 /// type with drop-glue in any upstream crate would invalidate all
979 /// functions calling drop-glue of an upstream type.
981 /// You likely want to call `Instance::upstream_monomorphization()`
982 /// instead of invoking this query directly.
984 /// NOTE: This query could easily be extended to also support other
985 /// common functions that have are large set of monomorphizations
986 /// (like `Clone::clone` for example).
987 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
988 desc { "available upstream drop-glue for `{:?}`", substs }
993 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
994 desc { "looking up the foreign modules of a linked crate" }
997 /// Identifies the entry-point (e.g., the `main` function) for a given
998 /// crate, returning `None` if there is no entry point (such as for library crates).
999 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1000 desc { "looking up the entry function of a crate" }
1002 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1003 desc { "looking up the plugin registrar for a crate" }
1005 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1006 desc { "looking up the derive registrar for a crate" }
1008 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1010 desc { "looking up the disambiguator a crate" }
1012 query crate_hash(_: CrateNum) -> Svh {
1014 desc { "looking up the hash a crate" }
1016 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1018 desc { "looking up the hash of a host version of a crate" }
1020 query original_crate_name(_: CrateNum) -> Symbol {
1022 desc { "looking up the original name a crate" }
1024 query extra_filename(_: CrateNum) -> String {
1026 desc { "looking up the extra filename for a crate" }
1031 query implementations_of_trait(_: (CrateNum, DefId))
1033 desc { "looking up implementations of a trait in a crate" }
1035 query all_trait_implementations(_: CrateNum)
1037 desc { "looking up all (?) trait implementations" }
1042 query dllimport_foreign_items(_: CrateNum)
1043 -> FxHashSet<DefId> {
1044 storage(ArenaCacheSelector<'tcx>)
1045 desc { "dllimport_foreign_items" }
1047 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1048 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1050 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1051 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1053 query native_library_kind(def_id: DefId)
1054 -> Option<NativeLibKind> {
1055 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1060 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1062 desc { "looking up link arguments for a crate" }
1067 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1068 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1069 storage(ArenaCacheSelector<'tcx>)
1070 desc { "resolving lifetimes" }
1072 query named_region_map(_: LocalDefId) ->
1073 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1074 desc { "looking up a named region" }
1076 query is_late_bound_map(_: LocalDefId) ->
1077 Option<&'tcx FxHashSet<ItemLocalId>> {
1078 desc { "testing if a region is late bound" }
1080 query object_lifetime_defaults_map(_: LocalDefId)
1081 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1082 desc { "looking up lifetime defaults for a region" }
1087 query visibility(def_id: DefId) -> ty::Visibility {
1088 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1093 query dep_kind(_: CrateNum) -> DepKind {
1095 desc { "fetching what a dependency looks like" }
1097 query crate_name(_: CrateNum) -> Symbol {
1099 desc { "fetching what a crate is named" }
1101 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1102 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1104 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1105 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1108 query get_lib_features(_: CrateNum) -> LibFeatures {
1109 storage(ArenaCacheSelector<'tcx>)
1111 desc { "calculating the lib features map" }
1113 query defined_lib_features(_: CrateNum)
1114 -> &'tcx [(Symbol, Option<Symbol>)] {
1115 desc { "calculating the lib features defined in a crate" }
1117 /// Returns the lang items defined in another crate by loading it from metadata.
1118 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1119 // of that argument?
1120 query get_lang_items(_: CrateNum) -> LanguageItems {
1121 storage(ArenaCacheSelector<'tcx>)
1123 desc { "calculating the lang items map" }
1126 /// Returns all diagnostic items defined in all crates.
1127 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1128 storage(ArenaCacheSelector<'tcx>)
1130 desc { "calculating the diagnostic items map" }
1133 /// Returns the lang items defined in another crate by loading it from metadata.
1134 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1135 desc { "calculating the lang items defined in a crate" }
1138 /// Returns the diagnostic items defined in a crate.
1139 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1140 storage(ArenaCacheSelector<'tcx>)
1141 desc { "calculating the diagnostic items map in a crate" }
1144 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1145 desc { "calculating the missing lang items in a crate" }
1147 query visible_parent_map(_: CrateNum)
1148 -> DefIdMap<DefId> {
1149 storage(ArenaCacheSelector<'tcx>)
1150 desc { "calculating the visible parent map" }
1152 query missing_extern_crate_item(_: CrateNum) -> bool {
1154 desc { "seeing if we're missing an `extern crate` item for this crate" }
1156 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1158 desc { "looking at the source for a crate" }
1160 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1162 desc { "generating a postorder list of CrateNums" }
1165 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1166 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1169 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1171 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1173 query maybe_unused_extern_crates(_: CrateNum)
1174 -> &'tcx [(LocalDefId, Span)] {
1176 desc { "looking up all possibly unused extern crates" }
1178 query names_imported_by_glob_use(def_id: LocalDefId)
1179 -> &'tcx FxHashSet<Symbol> {
1181 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1184 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1185 storage(ArenaCacheSelector<'tcx>)
1187 desc { "calculating the stability index for the local crate" }
1189 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1191 desc { "fetching all foreign CrateNum instances" }
1194 /// A vector of every trait accessible in the whole crate
1195 /// (i.e., including those from subcrates). This is used only for
1196 /// error reporting.
1197 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1198 desc { "fetching all foreign and local traits" }
1203 /// The list of symbols exported from the given crate.
1205 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1206 /// correspond to a publicly visible symbol in `cnum` machine code.
1207 /// - The `exported_symbols` sets of different crates do not intersect.
1208 query exported_symbols(_: CrateNum)
1209 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1210 desc { "exported_symbols" }
1215 query collect_and_partition_mono_items(_: CrateNum)
1216 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1218 desc { "collect_and_partition_mono_items" }
1220 query is_codegened_item(def_id: DefId) -> bool {
1221 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1223 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1224 desc { "codegen_unit" }
1226 query backend_optimization_level(_: CrateNum) -> OptLevel {
1227 desc { "optimization level used by backend" }
1232 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1234 desc { "output_filenames" }
1239 /// Do not call this query directly: invoke `normalize` instead.
1240 query normalize_projection_ty(
1241 goal: CanonicalProjectionGoal<'tcx>
1243 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1246 desc { "normalizing `{:?}`", goal }
1249 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1250 query normalize_generic_arg_after_erasing_regions(
1251 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1252 ) -> GenericArg<'tcx> {
1253 desc { "normalizing `{}`", goal.value }
1256 query implied_outlives_bounds(
1257 goal: CanonicalTyGoal<'tcx>
1259 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1262 desc { "computing implied outlives bounds for `{:?}`", goal }
1265 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1266 query dropck_outlives(
1267 goal: CanonicalTyGoal<'tcx>
1269 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1272 desc { "computing dropck types for `{:?}`", goal }
1275 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1276 /// `infcx.predicate_must_hold()` instead.
1277 query evaluate_obligation(
1278 goal: CanonicalPredicateGoal<'tcx>
1279 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1280 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1283 query evaluate_goal(
1284 goal: traits::ChalkCanonicalGoal<'tcx>
1286 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1289 desc { "evaluating trait selection obligation `{}`", goal.value }
1292 query type_implements_trait(
1293 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1295 desc { "evaluating `type_implements_trait` `{:?}`", key }
1298 /// Do not call this query directly: part of the `Eq` type-op
1299 query type_op_ascribe_user_type(
1300 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1302 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1305 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1308 /// Do not call this query directly: part of the `Eq` type-op
1310 goal: CanonicalTypeOpEqGoal<'tcx>
1312 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1315 desc { "evaluating `type_op_eq` `{:?}`", goal }
1318 /// Do not call this query directly: part of the `Subtype` type-op
1319 query type_op_subtype(
1320 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1322 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1325 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1328 /// Do not call this query directly: part of the `ProvePredicate` type-op
1329 query type_op_prove_predicate(
1330 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1332 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1335 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1338 /// Do not call this query directly: part of the `Normalize` type-op
1339 query type_op_normalize_ty(
1340 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1342 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1345 desc { "normalizing `{:?}`", goal }
1348 /// Do not call this query directly: part of the `Normalize` type-op
1349 query type_op_normalize_predicate(
1350 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1352 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1355 desc { "normalizing `{:?}`", goal }
1358 /// Do not call this query directly: part of the `Normalize` type-op
1359 query type_op_normalize_poly_fn_sig(
1360 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1362 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1365 desc { "normalizing `{:?}`", goal }
1368 /// Do not call this query directly: part of the `Normalize` type-op
1369 query type_op_normalize_fn_sig(
1370 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1372 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1375 desc { "normalizing `{:?}`", goal }
1378 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1380 "testing substituted normalized predicates:`{}`",
1381 tcx.def_path_str(key.0)
1385 query method_autoderef_steps(
1386 goal: CanonicalTyGoal<'tcx>
1387 ) -> MethodAutoderefStepsResult<'tcx> {
1388 desc { "computing autoderef types for `{:?}`", goal }
1393 query target_features_whitelist(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1394 storage(ArenaCacheSelector<'tcx>)
1396 desc { "looking up the whitelist of target features" }
1399 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1400 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1402 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1405 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1407 desc { "looking up enabled feature gates" }
1410 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1411 /// given generics args (`SubstsRef`), returning one of:
1412 /// * `Ok(Some(instance))` on success
1413 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1414 /// and therefore don't allow finding the final `Instance`
1415 /// * `Err(ErrorReported)` when the `Instance` resolution process
1416 /// couldn't complete due to errors elsewhere - this is distinct
1417 /// from `Ok(None)` to avoid misleading diagnostics when an error
1418 /// has already been/will be emitted, for the original cause
1419 query resolve_instance(
1420 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1421 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1422 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }