1 use crate::dep_graph::SerializedDepNodeIndex;
3 use crate::mir::interpret::{GlobalId, LitToConstInput};
5 use crate::traits::query::{
6 CanonicalPredicateGoal, CanonicalProjectionGoal, CanonicalTyGoal,
7 CanonicalTypeOpAscribeUserTypeGoal, CanonicalTypeOpEqGoal, CanonicalTypeOpNormalizeGoal,
8 CanonicalTypeOpProvePredicateGoal, CanonicalTypeOpSubtypeGoal,
10 use crate::ty::query::queries;
11 use crate::ty::query::QueryDescription;
12 use crate::ty::subst::{GenericArg, SubstsRef};
13 use crate::ty::{self, ParamEnvAnd, Ty, TyCtxt};
14 use rustc_hir::def_id::{CrateNum, DefId, LocalDefId};
16 use rustc_span::symbol::Symbol;
19 fn describe_as_module(def_id: DefId, tcx: TyCtxt<'_>) -> String {
20 if def_id.is_top_level_module() {
21 "top-level module".to_string()
23 format!("module `{}`", tcx.def_path_str(def_id))
27 // Each of these queries corresponds to a function pointer field in the
28 // `Providers` struct for requesting a value of that type, and a method
29 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
30 // which memoizes and does dep-graph tracking, wrapping around the actual
31 // `Providers` that the driver creates (using several `rustc_*` crates).
33 // The result type of each query must implement `Clone`, and additionally
34 // `ty::query::values::Value`, which produces an appropriate placeholder
35 // (error) value if the query resulted in a query cycle.
36 // Queries marked with `fatal_cycle` do not need the latter implementation,
37 // as they will raise an fatal error on query cycles instead.
40 query trigger_delay_span_bug(key: DefId) -> () {
41 desc { "trigger a delay span bug" }
46 // Represents crate as a whole (as distinct from the top-level crate module).
47 // If you call `hir_crate` (e.g., indirectly by calling `tcx.hir().krate()`),
48 // we will have to assume that any change means that you need to be recompiled.
49 // This is because the `hir_crate` query gives you access to all other items.
50 // To avoid this fate, do not call `tcx.hir().krate()`; instead,
51 // prefer wrappers like `tcx.visit_all_items_in_krate()`.
52 query hir_crate(key: CrateNum) -> &'tcx Crate<'tcx> {
55 desc { "get the crate HIR" }
58 // The indexed HIR. This can be conveniently accessed by `tcx.hir()`.
59 // Avoid calling this query directly.
60 query index_hir(_: CrateNum) -> &'tcx map::IndexedHir<'tcx> {
66 // The items in a module.
68 // This can be conveniently accessed by `tcx.hir().visit_item_likes_in_module`.
69 // Avoid calling this query directly.
70 query hir_module_items(key: LocalDefId) -> &'tcx hir::ModuleItems {
72 desc { |tcx| "HIR module items in `{}`", tcx.def_path_str(key.to_def_id()) }
75 // Gives access to the HIR node for the HIR owner `key`.
77 // This can be conveniently accessed by methods on `tcx.hir()`.
78 // Avoid calling this query directly.
79 query hir_owner(key: LocalDefId) -> Option<&'tcx crate::hir::Owner<'tcx>> {
81 desc { |tcx| "HIR owner of `{}`", tcx.def_path_str(key.to_def_id()) }
84 // Gives access to the HIR nodes and bodies inside the HIR owner `key`.
86 // This can be conveniently accessed by methods on `tcx.hir()`.
87 // Avoid calling this query directly.
88 query hir_owner_nodes(key: LocalDefId) -> Option<&'tcx crate::hir::OwnerNodes<'tcx>> {
90 desc { |tcx| "HIR owner items in `{}`", tcx.def_path_str(key.to_def_id()) }
93 /// Records the type of every item.
94 query type_of(key: DefId) -> Ty<'tcx> {
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) -> &'tcx ty::Generics {
106 cache_on_disk_if { key.is_local() }
107 load_cached(tcx, id) {
108 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
109 .try_load_query_result(tcx, id);
110 generics.map(|x| &*tcx.arena.alloc(x))
114 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
115 /// predicates (where-clauses) that must be proven true in order
116 /// to reference it. This is almost always the "predicates query"
119 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
120 /// it is almost always the same as that query, except for the
121 /// case of traits. For traits, `predicates_of` contains
122 /// an additional `Self: Trait<...>` predicate that users don't
123 /// actually write. This reflects the fact that to invoke the
124 /// trait (e.g., via `Default::default`) you must supply types
125 /// that actually implement the trait. (However, this extra
126 /// predicate gets in the way of some checks, which are intended
127 /// to operate over only the actual where-clauses written by the
129 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
130 cache_on_disk_if { key.is_local() }
133 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
134 desc { "looking up the native libraries of a linked crate" }
137 query lint_levels(_: CrateNum) -> &'tcx LintLevelMap {
139 desc { "computing the lint levels for items in this crate" }
142 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
144 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
149 query is_panic_runtime(_: CrateNum) -> bool {
151 desc { "checking if the crate is_panic_runtime" }
156 /// Set of all the `DefId`s in this crate that have MIR associated with
157 /// them. This includes all the body owners, but also things like struct
159 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
160 desc { "getting a list of all mir_keys" }
163 /// Maps DefId's that have an associated `mir::Body` to the result
164 /// of the MIR const-checking pass. This is the set of qualifs in
165 /// the final value of a `const`.
166 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
167 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
168 cache_on_disk_if { key.is_local() }
171 /// Fetch the MIR for a given `DefId` right after it's built - this includes
172 /// unreachable code.
173 query mir_built(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {
174 desc { "building MIR for" }
177 /// Fetch the MIR for a given `DefId` up till the point where it is
178 /// ready for const evaluation.
180 /// See the README for the `mir` module for details.
181 query mir_const(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {
185 query mir_validated(_: DefId) ->
187 &'tcx Steal<mir::BodyAndCache<'tcx>>,
188 &'tcx Steal<IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>>>
193 /// MIR after our optimization passes have run. This is MIR that is ready
194 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
195 query optimized_mir(key: DefId) -> &'tcx mir::BodyAndCache<'tcx> {
196 cache_on_disk_if { key.is_local() }
197 load_cached(tcx, id) {
198 let mir: Option<crate::mir::BodyAndCache<'tcx>>
199 = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
201 let cache = tcx.arena.alloc(x);
202 cache.ensure_predecessors();
208 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>> {
209 cache_on_disk_if { key.is_local() }
210 load_cached(tcx, id) {
211 let promoted: Option<
212 rustc_index::vec::IndexVec<
213 crate::mir::Promoted,
214 crate::mir::BodyAndCache<'tcx>
215 >> = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
217 let cache = tcx.arena.alloc(p);
218 for body in cache.iter_mut() {
219 body.ensure_predecessors();
228 // Erases regions from `ty` to yield a new type.
229 // Normally you would just use `tcx.erase_regions(&value)`,
230 // however, which uses this query as a kind of cache.
231 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
232 // This query is not expected to have input -- as a result, it
233 // is not a good candidates for "replay" because it is essentially a
234 // pure function of its input (and hence the expectation is that
235 // no caller would be green **apart** from just these
236 // queries). Making it anonymous avoids hashing the result, which
237 // may save a bit of time.
239 desc { "erasing regions from `{:?}`", ty }
242 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
243 desc { "generating chalk-style clauses" }
246 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
247 desc { "generating chalk-style clauses for environment" }
250 // Get the chalk-style environment of the given item.
251 query environment(_: DefId) -> traits::Environment<'tcx> {
252 desc { "return a chalk-style environment" }
257 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
258 desc { "wasm import module map" }
263 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
264 /// predicates (where-clauses) directly defined on it. This is
265 /// equal to the `explicit_predicates_of` predicates plus the
266 /// `inferred_outlives_of` predicates.
267 query predicates_defined_on(_: DefId) -> ty::GenericPredicates<'tcx> {}
269 /// Returns the predicates written explicitly by the user.
270 query explicit_predicates_of(_: DefId) -> ty::GenericPredicates<'tcx> {}
272 /// Returns the inferred outlives predicates (e.g., for `struct
273 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
274 query inferred_outlives_of(_: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {}
276 /// Maps from the `DefId` of a trait to the list of
277 /// super-predicates. This is a subset of the full list of
278 /// predicates. We store these in a separate map because we must
279 /// evaluate them even during type conversion, often before the
280 /// full predicates are available (note that supertraits have
281 /// additional acyclicity requirements).
282 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
283 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
286 /// To avoid cycles within the predicates of a single item we compute
287 /// per-type-parameter predicates for resolving `T::AssocTy`.
288 query type_param_predicates(key: (DefId, DefId)) -> ty::GenericPredicates<'tcx> {
289 desc { |tcx| "computing the bounds for type parameter `{}`", {
290 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
291 tcx.hir().ty_param_name(id)
295 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
296 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
297 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
299 // The cycle error here should be reported as an error by `check_representable`.
300 // We consider the type as Sized in the meanwhile to avoid
301 // further errors (done in impl Value for AdtSizedConstraint).
302 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
303 // in case we accidentally otherwise don't emit an error.
304 query adt_sized_constraint(
306 ) -> AdtSizedConstraint<'tcx> {
310 query adt_dtorck_constraint(
312 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
314 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
315 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
316 /// not have the feature gate active).
318 /// **Do not call this function manually.** It is only meant to cache the base data for the
319 /// `is_const_fn` function.
320 query is_const_fn_raw(key: DefId) -> bool {
321 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
324 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
326 /// This query caches the base data for the `is_const_impl` helper function, which also
327 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
328 query is_const_impl_raw(key: DefId) -> bool {
329 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
332 query asyncness(key: DefId) -> hir::IsAsync {
333 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
336 /// Returns `true` if calls to the function may be promoted.
338 /// This is either because the function is e.g., a tuple-struct or tuple-variant
339 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
340 /// be removed in the future in favour of some form of check which figures out whether the
341 /// function does not inspect the bits of any of its arguments (so is essentially just a
342 /// constructor function).
343 query is_promotable_const_fn(_: DefId) -> bool {}
345 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
347 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
348 query is_foreign_item(_: DefId) -> bool {}
350 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
351 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
353 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
354 query generator_kind(_: DefId) -> Option<hir::GeneratorKind> {}
356 /// Gets a map with the variance of every item; use `item_variance` instead.
357 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
358 desc { "computing the variances for items in this crate" }
361 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
362 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
366 /// Maps from thee `DefId` of a type to its (inferred) outlives.
367 query inferred_outlives_crate(_: CrateNum)
368 -> &'tcx ty::CratePredicatesMap<'tcx> {
369 desc { "computing the inferred outlives predicates for items in this crate" }
374 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
375 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
377 /// Maps from a trait item to the trait item "descriptor".
378 query associated_item(_: DefId) -> ty::AssocItem {}
380 /// Collects the associated items defined on a trait or impl.
381 query associated_items(key: DefId) -> &'tcx ty::AssociatedItems {
382 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
385 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
386 query impl_polarity(_: DefId) -> ty::ImplPolarity {}
388 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
392 /// Maps a `DefId` of a type to a list of its inherent impls.
393 /// Contains implementations of methods that are inherent to a type.
394 /// Methods in these implementations don't need to be exported.
395 query inherent_impls(_: DefId) -> &'tcx [DefId] {
401 /// The result of unsafety-checking this `DefId`.
402 query unsafety_check_result(key: DefId) -> mir::UnsafetyCheckResult {
403 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key) }
404 cache_on_disk_if { key.is_local() }
407 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
408 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
410 /// The signature of functions and closures.
411 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
415 query lint_mod(key: DefId) -> () {
416 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
419 /// Checks the attributes in the module.
420 query check_mod_attrs(key: DefId) -> () {
421 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
424 query check_mod_unstable_api_usage(key: DefId) -> () {
425 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
428 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
429 query check_mod_const_bodies(key: DefId) -> () {
430 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
433 /// Checks the loops in the module.
434 query check_mod_loops(key: DefId) -> () {
435 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
438 query check_mod_item_types(key: DefId) -> () {
439 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
442 query check_mod_privacy(key: DefId) -> () {
443 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
446 query check_mod_intrinsics(key: DefId) -> () {
447 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
450 query check_mod_liveness(key: DefId) -> () {
451 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
454 query check_mod_impl_wf(key: DefId) -> () {
455 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
458 query collect_mod_item_types(key: DefId) -> () {
459 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
462 /// Caches `CoerceUnsized` kinds for impls on custom types.
463 query coerce_unsized_info(_: DefId)
464 -> ty::adjustment::CoerceUnsizedInfo {}
468 query typeck_item_bodies(_: CrateNum) -> () {
469 desc { "type-checking all item bodies" }
472 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
473 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key) }
474 cache_on_disk_if { key.is_local() }
476 query diagnostic_only_typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
477 cache_on_disk_if { key.is_local() }
478 load_cached(tcx, id) {
479 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
480 .queries.on_disk_cache
481 .try_load_query_result(tcx, id);
483 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
489 query used_trait_imports(key: DefId) -> &'tcx DefIdSet {
490 cache_on_disk_if { key.is_local() }
495 query has_typeck_tables(_: DefId) -> bool {}
497 query coherent_trait(def_id: DefId) -> () {
498 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
503 /// Borrow-checks the function body. If this is a closure, returns
504 /// additional requirements that the closure's creator must verify.
505 query mir_borrowck(key: DefId) -> &'tcx mir::BorrowCheckResult<'tcx> {
506 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key) }
507 cache_on_disk_if(tcx, opt_result) {
509 && (tcx.is_closure(key)
510 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty()))
516 /// Gets a complete map from all types to their inherent impls.
517 /// Not meant to be used directly outside of coherence.
518 /// (Defined only for `LOCAL_CRATE`.)
519 query crate_inherent_impls(k: CrateNum)
520 -> &'tcx CrateInherentImpls {
522 desc { "all inherent impls defined in crate `{:?}`", k }
525 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
526 /// Not meant to be used directly outside of coherence.
527 /// (Defined only for `LOCAL_CRATE`.)
528 query crate_inherent_impls_overlap_check(_: CrateNum)
531 desc { "check for overlap between inherent impls defined in this crate" }
536 /// Evaluates a constant without running sanity checks.
538 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
539 /// during validation. Please add a comment to every use site explaining why using
540 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
541 /// form to be used outside of const eval.
542 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
543 -> ConstEvalRawResult<'tcx> {
545 "const-evaluating `{}`",
546 tcx.def_path_str(key.value.instance.def.def_id())
550 /// Results of evaluating const items or constants embedded in
551 /// other items (such as enum variant explicit discriminants).
553 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
554 /// returns a proper constant that is usable by the rest of the compiler.
556 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
557 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
558 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
559 -> ConstEvalResult<'tcx> {
561 "const-evaluating + checking `{}`",
562 tcx.def_path_str(key.value.instance.def.def_id())
564 cache_on_disk_if(_, opt_result) {
565 // Only store results without errors
566 opt_result.map_or(true, |r| r.is_ok())
570 /// Extracts a field of a (variant of a) const.
572 key: ty::ParamEnvAnd<'tcx, (&'tcx ty::Const<'tcx>, mir::Field)>
573 ) -> ConstValue<'tcx> {
574 desc { "extract field of const" }
577 /// Destructure a constant ADT or array into its variant indent and its
579 query destructure_const(
580 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
581 ) -> mir::DestructuredConst<'tcx> {
582 desc { "destructure constant" }
585 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
586 desc { "get a &core::panic::Location referring to a span" }
590 key: LitToConstInput<'tcx>
591 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
592 desc { "converting literal to const" }
597 query check_match(key: DefId) {
598 cache_on_disk_if { key.is_local() }
601 /// Performs part of the privacy check and computes "access levels".
602 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
604 desc { "privacy access levels" }
606 query check_private_in_public(_: CrateNum) -> () {
608 desc { "checking for private elements in public interfaces" }
613 query reachable_set(_: CrateNum) -> Lrc<HirIdSet> {
614 desc { "reachability" }
617 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
618 /// in the case of closures, this will be redirected to the enclosing function.
619 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
621 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::BodyAndCache<'tcx> {
622 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
625 /// The `symbol_name` query provides the symbol name for calling a
626 /// given instance from the local crate. In particular, it will also
627 /// look up the correct symbol name of instances from upstream crates.
628 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
629 desc { "computing the symbol for `{}`", key }
630 cache_on_disk_if { true }
633 query def_kind(_: DefId) -> Option<DefKind> {}
634 query def_span(_: DefId) -> Span {
635 // FIXME(mw): DefSpans are not really inputs since they are derived from
636 // HIR. But at the moment HIR hashing still contains some hacks that allow
637 // to make type debuginfo to be source location independent. Declaring
638 // DefSpan an input makes sure that changes to these are always detected
639 // regardless of HIR hashing.
642 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
643 query lookup_const_stability(_: DefId) -> Option<&'tcx attr::ConstStability> {}
644 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
645 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
649 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {
650 cache_on_disk_if { true }
655 query fn_arg_names(_: DefId) -> &'tcx [ast::Name] {}
656 /// Gets the rendered value of the specified constant or associated constant.
658 query rendered_const(_: DefId) -> String {}
659 query impl_parent(_: DefId) -> Option<DefId> {}
663 query trait_of_item(_: DefId) -> Option<DefId> {}
667 query is_mir_available(key: DefId) -> bool {
668 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
673 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
674 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
675 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
680 query codegen_fulfill_obligation(
681 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
682 ) -> Option<Vtable<'tcx, ()>> {
683 cache_on_disk_if { true }
685 "checking if `{}` fulfills its obligations",
686 tcx.def_path_str(key.1.def_id())
692 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
693 desc { "local trait impls" }
695 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
696 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
698 query specialization_graph_of(key: DefId) -> &'tcx specialization_graph::Graph {
699 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
700 cache_on_disk_if { true }
702 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
703 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
706 /// Gets the ParameterEnvironment for a given item; this environment
707 /// will be in "user-facing" mode, meaning that it is suitabe for
708 /// type-checking etc, and it does not normalize specializable
709 /// associated types. This is almost always what you want,
710 /// unless you are doing MIR optimizations, in which case you
711 /// might want to use `reveal_all()` method to change modes.
712 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
714 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
715 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
716 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
717 desc { "computing whether `{}` is `Copy`", env.value }
719 /// Query backing `TyS::is_sized`.
720 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
721 desc { "computing whether `{}` is `Sized`", env.value }
723 /// Query backing `TyS::is_freeze`.
724 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
725 desc { "computing whether `{}` is freeze", env.value }
727 /// Query backing `TyS::needs_drop`.
728 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
729 desc { "computing whether `{}` needs drop", env.value }
732 /// A list of types where the ADT requires drop if and only if any of
733 /// those types require drop. If the ADT is known to always need drop
734 /// then `Err(AlwaysRequiresDrop)` is returned.
735 query adt_drop_tys(_: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
736 cache_on_disk_if { true }
740 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
741 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
742 desc { "computing layout of `{}`", env.value }
747 query dylib_dependency_formats(_: CrateNum)
748 -> &'tcx [(CrateNum, LinkagePreference)] {
749 desc { "dylib dependency formats of crate" }
752 query dependency_formats(_: CrateNum)
753 -> Lrc<crate::middle::dependency_format::Dependencies>
755 desc { "get the linkage format of all dependencies" }
760 query is_compiler_builtins(_: CrateNum) -> bool {
762 desc { "checking if the crate is_compiler_builtins" }
764 query has_global_allocator(_: CrateNum) -> bool {
766 desc { "checking if the crate has_global_allocator" }
768 query has_panic_handler(_: CrateNum) -> bool {
770 desc { "checking if the crate has_panic_handler" }
772 query is_profiler_runtime(_: CrateNum) -> bool {
774 desc { "query a crate is `#![profiler_runtime]`" }
776 query panic_strategy(_: CrateNum) -> PanicStrategy {
778 desc { "query a crate's configured panic strategy" }
780 query is_no_builtins(_: CrateNum) -> bool {
782 desc { "test whether a crate has `#![no_builtins]`" }
784 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
786 desc { "query a crate's symbol mangling version" }
789 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
791 desc { "getting crate's ExternCrateData" }
796 query specializes(_: (DefId, DefId)) -> bool {
797 desc { "computing whether impls specialize one another" }
799 query in_scope_traits_map(_: LocalDefId)
800 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
802 desc { "traits in scope at a block" }
807 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
813 query impl_defaultness(_: DefId) -> hir::Defaultness {}
815 query check_item_well_formed(_: DefId) -> () {}
816 query check_trait_item_well_formed(_: DefId) -> () {}
817 query check_impl_item_well_formed(_: DefId) -> () {}
821 // The `DefId`s of all non-generic functions and statics in the given crate
822 // that can be reached from outside the crate.
824 // We expect this items to be available for being linked to.
826 // This query can also be called for `LOCAL_CRATE`. In this case it will
827 // compute which items will be reachable to other crates, taking into account
828 // the kind of crate that is currently compiled. Crates with only a
829 // C interface have fewer reachable things.
831 // Does not include external symbols that don't have a corresponding DefId,
832 // like the compiler-generated `main` function and so on.
833 query reachable_non_generics(_: CrateNum)
834 -> &'tcx DefIdMap<SymbolExportLevel> {
835 desc { "looking up the exported symbols of a crate" }
837 query is_reachable_non_generic(_: DefId) -> bool {}
838 query is_unreachable_local_definition(_: DefId) -> bool {}
842 /// The entire set of monomorphizations the local crate can safely link
843 /// to because they are exported from upstream crates. Do not depend on
844 /// this directly, as its value changes anytime a monomorphization gets
845 /// added or removed in any upstream crate. Instead use the narrower
846 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
847 /// better, `Instance::upstream_monomorphization()`.
848 query upstream_monomorphizations(
850 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
851 desc { "collecting available upstream monomorphizations `{:?}`", k }
854 /// Returns the set of upstream monomorphizations available for the
855 /// generic function identified by the given `def_id`. The query makes
856 /// sure to make a stable selection if the same monomorphization is
857 /// available in multiple upstream crates.
859 /// You likely want to call `Instance::upstream_monomorphization()`
860 /// instead of invoking this query directly.
861 query upstream_monomorphizations_for(_: DefId)
862 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
864 /// Returns the upstream crate that exports drop-glue for the given
865 /// type (`substs` is expected to be a single-item list containing the
866 /// type one wants drop-glue for).
868 /// This is a subset of `upstream_monomorphizations_for` in order to
869 /// increase dep-tracking granularity. Otherwise adding or removing any
870 /// type with drop-glue in any upstream crate would invalidate all
871 /// functions calling drop-glue of an upstream type.
873 /// You likely want to call `Instance::upstream_monomorphization()`
874 /// instead of invoking this query directly.
876 /// NOTE: This query could easily be extended to also support other
877 /// common functions that have are large set of monomorphizations
878 /// (like `Clone::clone` for example).
879 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
880 desc { "available upstream drop-glue for `{:?}`", substs }
885 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
886 desc { "looking up the foreign modules of a linked crate" }
889 /// Identifies the entry-point (e.g., the `main` function) for a given
890 /// crate, returning `None` if there is no entry point (such as for library crates).
891 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
892 desc { "looking up the entry function of a crate" }
894 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
895 desc { "looking up the plugin registrar for a crate" }
897 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
898 desc { "looking up the derive registrar for a crate" }
900 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
902 desc { "looking up the disambiguator a crate" }
904 query crate_hash(_: CrateNum) -> Svh {
906 desc { "looking up the hash a crate" }
908 query crate_host_hash(_: CrateNum) -> Option<Svh> {
910 desc { "looking up the hash of a host version of a crate" }
912 query original_crate_name(_: CrateNum) -> Symbol {
914 desc { "looking up the original name a crate" }
916 query extra_filename(_: CrateNum) -> String {
918 desc { "looking up the extra filename for a crate" }
923 query implementations_of_trait(_: (CrateNum, DefId))
925 desc { "looking up implementations of a trait in a crate" }
927 query all_trait_implementations(_: CrateNum)
929 desc { "looking up all (?) trait implementations" }
934 query dllimport_foreign_items(_: CrateNum)
935 -> &'tcx FxHashSet<DefId> {
936 desc { "dllimport_foreign_items" }
938 query is_dllimport_foreign_item(_: DefId) -> bool {}
939 query is_statically_included_foreign_item(_: DefId) -> bool {}
940 query native_library_kind(_: DefId)
941 -> Option<NativeLibraryKind> {}
945 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
947 desc { "looking up link arguments for a crate" }
952 /// Lifetime resolution. See `middle::resolve_lifetimes`.
953 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
954 desc { "resolving lifetimes" }
956 query named_region_map(_: LocalDefId) ->
957 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
958 desc { "looking up a named region" }
960 query is_late_bound_map(_: LocalDefId) ->
961 Option<&'tcx FxHashSet<ItemLocalId>> {
962 desc { "testing if a region is late bound" }
964 query object_lifetime_defaults_map(_: LocalDefId)
965 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
966 desc { "looking up lifetime defaults for a region" }
971 query visibility(_: DefId) -> ty::Visibility {}
975 query dep_kind(_: CrateNum) -> DepKind {
977 desc { "fetching what a dependency looks like" }
979 query crate_name(_: CrateNum) -> Symbol {
981 desc { "fetching what a crate is named" }
983 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
984 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
986 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
988 desc { "calculating the lib features map" }
990 query defined_lib_features(_: CrateNum)
991 -> &'tcx [(Symbol, Option<Symbol>)] {
992 desc { "calculating the lib features defined in a crate" }
994 /// Returns the lang items defined in another crate by loading it from metadata.
995 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
997 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
999 desc { "calculating the lang items map" }
1002 /// Returns all diagnostic items defined in all crates.
1003 query all_diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
1005 desc { "calculating the diagnostic items map" }
1008 /// Returns the lang items defined in another crate by loading it from metadata.
1009 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1010 desc { "calculating the lang items defined in a crate" }
1013 /// Returns the diagnostic items defined in a crate.
1014 query diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
1015 desc { "calculating the diagnostic items map in a crate" }
1018 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1019 desc { "calculating the missing lang items in a crate" }
1021 query visible_parent_map(_: CrateNum)
1022 -> &'tcx DefIdMap<DefId> {
1023 desc { "calculating the visible parent map" }
1025 query missing_extern_crate_item(_: CrateNum) -> bool {
1027 desc { "seeing if we're missing an `extern crate` item for this crate" }
1029 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1031 desc { "looking at the source for a crate" }
1033 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1035 desc { "generating a postorder list of CrateNums" }
1038 query upvars(_: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1041 query maybe_unused_trait_import(_: DefId) -> bool {
1044 query maybe_unused_extern_crates(_: CrateNum)
1045 -> &'tcx [(DefId, Span)] {
1047 desc { "looking up all possibly unused extern crates" }
1049 query names_imported_by_glob_use(_: DefId)
1050 -> Lrc<FxHashSet<ast::Name>> {
1054 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
1056 desc { "calculating the stability index for the local crate" }
1058 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1060 desc { "fetching all foreign CrateNum instances" }
1063 /// A vector of every trait accessible in the whole crate
1064 /// (i.e., including those from subcrates). This is used only for
1065 /// error reporting.
1066 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1067 desc { "fetching all foreign and local traits" }
1072 /// The list of symbols exported from the given crate.
1074 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1075 /// correspond to a publicly visible symbol in `cnum` machine code.
1076 /// - The `exported_symbols` sets of different crates do not intersect.
1077 query exported_symbols(_: CrateNum)
1078 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
1079 desc { "exported_symbols" }
1084 query collect_and_partition_mono_items(_: CrateNum)
1085 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
1087 desc { "collect_and_partition_mono_items" }
1089 query is_codegened_item(_: DefId) -> bool {}
1090 query codegen_unit(_: Symbol) -> Arc<CodegenUnit<'tcx>> {
1091 desc { "codegen_unit" }
1093 query backend_optimization_level(_: CrateNum) -> OptLevel {
1094 desc { "optimization level used by backend" }
1099 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1101 desc { "output_filenames" }
1106 /// Do not call this query directly: invoke `normalize` instead.
1107 query normalize_projection_ty(
1108 goal: CanonicalProjectionGoal<'tcx>
1110 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1113 desc { "normalizing `{:?}`", goal }
1116 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1117 query normalize_generic_arg_after_erasing_regions(
1118 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1119 ) -> GenericArg<'tcx> {
1120 desc { "normalizing `{}`", goal.value }
1123 query implied_outlives_bounds(
1124 goal: CanonicalTyGoal<'tcx>
1126 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1129 desc { "computing implied outlives bounds for `{:?}`", goal }
1132 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1133 query dropck_outlives(
1134 goal: CanonicalTyGoal<'tcx>
1136 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1139 desc { "computing dropck types for `{:?}`", goal }
1142 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1143 /// `infcx.predicate_must_hold()` instead.
1144 query evaluate_obligation(
1145 goal: CanonicalPredicateGoal<'tcx>
1146 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1147 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1150 /// Do not call this query directly: part of the `Eq` type-op
1151 query type_op_ascribe_user_type(
1152 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1154 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1157 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1160 /// Do not call this query directly: part of the `Eq` type-op
1162 goal: CanonicalTypeOpEqGoal<'tcx>
1164 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1167 desc { "evaluating `type_op_eq` `{:?}`", goal }
1170 /// Do not call this query directly: part of the `Subtype` type-op
1171 query type_op_subtype(
1172 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1174 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1177 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1180 /// Do not call this query directly: part of the `ProvePredicate` type-op
1181 query type_op_prove_predicate(
1182 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1184 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1187 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1190 /// Do not call this query directly: part of the `Normalize` type-op
1191 query type_op_normalize_ty(
1192 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1194 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1197 desc { "normalizing `{:?}`", goal }
1200 /// Do not call this query directly: part of the `Normalize` type-op
1201 query type_op_normalize_predicate(
1202 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1204 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1207 desc { "normalizing `{:?}`", goal }
1210 /// Do not call this query directly: part of the `Normalize` type-op
1211 query type_op_normalize_poly_fn_sig(
1212 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1214 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1217 desc { "normalizing `{:?}`", goal }
1220 /// Do not call this query directly: part of the `Normalize` type-op
1221 query type_op_normalize_fn_sig(
1222 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1224 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1227 desc { "normalizing `{:?}`", goal }
1230 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1232 "testing substituted normalized predicates:`{}`",
1233 tcx.def_path_str(key.0)
1237 query method_autoderef_steps(
1238 goal: CanonicalTyGoal<'tcx>
1239 ) -> MethodAutoderefStepsResult<'tcx> {
1240 desc { "computing autoderef types for `{:?}`", goal }
1245 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1247 desc { "looking up the whitelist of target features" }
1250 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1251 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1253 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1256 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1258 desc { "looking up enabled feature gates" }