1 use crate::ty::query::QueryDescription;
2 use crate::ty::query::queries;
3 use crate::ty::{self, ParamEnvAnd, Ty, TyCtxt};
4 use crate::ty::subst::SubstsRef;
5 use crate::dep_graph::{RecoverKey,DepKind, DepNode, SerializedDepNodeIndex};
6 use crate::hir::def_id::{CrateNum, DefId, DefIndex};
8 use crate::mir::interpret::GlobalId;
10 use crate::traits::query::{
11 CanonicalPredicateGoal, CanonicalProjectionGoal,
12 CanonicalTyGoal, CanonicalTypeOpAscribeUserTypeGoal,
13 CanonicalTypeOpEqGoal, CanonicalTypeOpSubtypeGoal, CanonicalTypeOpProvePredicateGoal,
14 CanonicalTypeOpNormalizeGoal,
18 use syntax_pos::symbol::Symbol;
20 // Each of these queries corresponds to a function pointer field in the
21 // `Providers` struct for requesting a value of that type, and a method
22 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
23 // which memoizes and does dep-graph tracking, wrapping around the actual
24 // `Providers` that the driver creates (using several `rustc_*` crates).
26 // The result type of each query must implement `Clone`, and additionally
27 // `ty::query::values::Value`, which produces an appropriate placeholder
28 // (error) value if the query resulted in a query cycle.
29 // Queries marked with `fatal_cycle` do not need the latter implementation,
30 // as they will raise an fatal error on query cycles instead.
33 query trigger_delay_span_bug(key: DefId) -> () {
34 desc { "trigger a delay span bug" }
39 /// Records the type of every item.
40 query type_of(key: DefId) -> Ty<'tcx> {
41 cache_on_disk_if { key.is_local() }
44 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
45 /// associated generics.
46 query generics_of(key: DefId) -> &'tcx ty::Generics {
47 cache_on_disk_if { key.is_local() }
48 load_cached(tcx, id) {
49 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
50 .try_load_query_result(tcx, id);
51 generics.map(|x| &*tcx.arena.alloc(x))
55 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
56 /// predicates (where-clauses) that must be proven true in order
57 /// to reference it. This is almost always the "predicates query"
60 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
61 /// it is almost always the same as that query, except for the
62 /// case of traits. For traits, `predicates_of` contains
63 /// an additional `Self: Trait<...>` predicate that users don't
64 /// actually write. This reflects the fact that to invoke the
65 /// trait (e.g., via `Default::default`) you must supply types
66 /// that actually implement the trait. (However, this extra
67 /// predicate gets in the way of some checks, which are intended
68 /// to operate over only the actual where-clauses written by the
70 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
71 cache_on_disk_if { key.is_local() }
74 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
75 desc { "looking up the native libraries of a linked crate" }
78 query lint_levels(_: CrateNum) -> &'tcx lint::LintLevelMap {
80 desc { "computing the lint levels for items in this crate" }
85 query is_panic_runtime(_: CrateNum) -> bool {
87 desc { "checking if the crate is_panic_runtime" }
92 /// Set of all the `DefId`s in this crate that have MIR associated with
93 /// them. This includes all the body owners, but also things like struct
95 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
96 desc { "getting a list of all mir_keys" }
99 /// Maps DefId's that have an associated `mir::Body` to the result
100 /// of the MIR const-checking pass. This is the set of qualifs in
101 /// the final value of a `const`.
102 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
103 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
104 cache_on_disk_if { key.is_local() }
107 /// Fetch the MIR for a given `DefId` right after it's built - this includes
108 /// unreachable code.
109 query mir_built(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {}
111 /// Fetch the MIR for a given `DefId` up till the point where it is
112 /// ready for const evaluation.
114 /// See the README for the `mir` module for details.
115 query mir_const(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {
119 query mir_validated(_: DefId) ->
121 &'tcx Steal<mir::BodyAndCache<'tcx>>,
122 &'tcx Steal<IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>>>
127 /// MIR after our optimization passes have run. This is MIR that is ready
128 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
129 query optimized_mir(key: DefId) -> &'tcx mir::BodyAndCache<'tcx> {
130 cache_on_disk_if { key.is_local() }
131 load_cached(tcx, id) {
132 let mir: Option<crate::mir::BodyAndCache<'tcx>>
133 = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
135 let cache = tcx.arena.alloc(x);
136 cache.ensure_predecessors();
142 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>> {
143 cache_on_disk_if { key.is_local() }
144 load_cached(tcx, id) {
145 let promoted: Option<
146 rustc_index::vec::IndexVec<
147 crate::mir::Promoted,
148 crate::mir::BodyAndCache<'tcx>
149 >> = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
151 let cache = tcx.arena.alloc(p);
152 for body in cache.iter_mut() {
153 body.ensure_predecessors();
162 // Erases regions from `ty` to yield a new type.
163 // Normally you would just use `tcx.erase_regions(&value)`,
164 // however, which uses this query as a kind of cache.
165 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
166 // This query is not expected to have input -- as a result, it
167 // is not a good candidates for "replay" because it is essentially a
168 // pure function of its input (and hence the expectation is that
169 // no caller would be green **apart** from just these
170 // queries). Making it anonymous avoids hashing the result, which
171 // may save a bit of time.
174 desc { "erasing regions from `{:?}`", ty }
177 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
178 desc { "generating chalk-style clauses" }
181 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
183 desc { "generating chalk-style clauses for environment" }
186 // Get the chalk-style environment of the given item.
187 query environment(_: DefId) -> traits::Environment<'tcx> {
188 desc { "return a chalk-style environment" }
193 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
194 desc { "wasm import module map" }
199 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
200 /// predicates (where-clauses) directly defined on it. This is
201 /// equal to the `explicit_predicates_of` predicates plus the
202 /// `inferred_outlives_of` predicates.
203 query predicates_defined_on(_: DefId) -> ty::GenericPredicates<'tcx> {}
205 /// Returns the predicates written explicitly by the user.
206 query explicit_predicates_of(_: DefId) -> ty::GenericPredicates<'tcx> {}
208 /// Returns the inferred outlives predicates (e.g., for `struct
209 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
210 query inferred_outlives_of(_: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {}
212 /// Maps from the `DefId` of a trait to the list of
213 /// super-predicates. This is a subset of the full list of
214 /// predicates. We store these in a separate map because we must
215 /// evaluate them even during type conversion, often before the
216 /// full predicates are available (note that supertraits have
217 /// additional acyclicity requirements).
218 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
219 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
222 /// To avoid cycles within the predicates of a single item we compute
223 /// per-type-parameter predicates for resolving `T::AssocTy`.
224 query type_param_predicates(key: (DefId, DefId)) -> ty::GenericPredicates<'tcx> {
226 desc { |tcx| "computing the bounds for type parameter `{}`", {
227 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
228 tcx.hir().ty_param_name(id)
232 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
233 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
234 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
236 // The cycle error here should be reported as an error by `check_representable`.
237 // We consider the type as Sized in the meanwhile to avoid
238 // further errors (done in impl Value for AdtSizedConstraint).
239 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
240 // in case we accidentally otherwise don't emit an error.
241 query adt_sized_constraint(
243 ) -> AdtSizedConstraint<'tcx> {
247 query adt_dtorck_constraint(
249 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
251 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
252 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
253 /// not have the feature gate active).
255 /// **Do not call this function manually.** It is only meant to cache the base data for the
256 /// `is_const_fn` function.
257 query is_const_fn_raw(key: DefId) -> bool {
258 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
261 query asyncness(key: DefId) -> hir::IsAsync {
262 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
265 /// Returns `true` if calls to the function may be promoted.
267 /// This is either because the function is e.g., a tuple-struct or tuple-variant
268 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
269 /// be removed in the future in favour of some form of check which figures out whether the
270 /// function does not inspect the bits of any of its arguments (so is essentially just a
271 /// constructor function).
272 query is_promotable_const_fn(_: DefId) -> bool {}
274 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
276 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
277 query is_foreign_item(_: DefId) -> bool {}
279 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
280 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
282 /// Gets a map with the variance of every item; use `item_variance` instead.
283 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
284 desc { "computing the variances for items in this crate" }
287 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
288 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
292 /// Maps from thee `DefId` of a type to its (inferred) outlives.
293 query inferred_outlives_crate(_: CrateNum)
294 -> &'tcx ty::CratePredicatesMap<'tcx> {
295 desc { "computing the inferred outlives predicates for items in this crate" }
300 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
301 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
303 /// Maps from a trait item to the trait item "descriptor".
304 query associated_item(_: DefId) -> ty::AssocItem {}
306 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
307 query impl_polarity(_: DefId) -> ty::ImplPolarity {}
309 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
313 /// Maps a `DefId` of a type to a list of its inherent impls.
314 /// Contains implementations of methods that are inherent to a type.
315 /// Methods in these implementations don't need to be exported.
316 query inherent_impls(_: DefId) -> &'tcx [DefId] {
322 /// The result of unsafety-checking this `DefId`.
323 query unsafety_check_result(key: DefId) -> mir::UnsafetyCheckResult {
324 cache_on_disk_if { key.is_local() }
327 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
328 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
330 /// The signature of functions and closures.
331 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
335 query lint_mod(key: DefId) -> () {
336 desc { |tcx| "linting {}", key.describe_as_module(tcx) }
339 /// Checks the attributes in the module.
340 query check_mod_attrs(key: DefId) -> () {
341 desc { |tcx| "checking attributes in {}", key.describe_as_module(tcx) }
344 query check_mod_unstable_api_usage(key: DefId) -> () {
345 desc { |tcx| "checking for unstable API usage in {}", key.describe_as_module(tcx) }
348 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
349 query check_mod_const_bodies(key: DefId) -> () {
350 desc { |tcx| "checking consts in {}", key.describe_as_module(tcx) }
353 /// Checks the loops in the module.
354 query check_mod_loops(key: DefId) -> () {
355 desc { |tcx| "checking loops in {}", key.describe_as_module(tcx) }
358 query check_mod_item_types(key: DefId) -> () {
359 desc { |tcx| "checking item types in {}", key.describe_as_module(tcx) }
362 query check_mod_privacy(key: DefId) -> () {
363 desc { |tcx| "checking privacy in {}", key.describe_as_module(tcx) }
366 query check_mod_intrinsics(key: DefId) -> () {
367 desc { |tcx| "checking intrinsics in {}", key.describe_as_module(tcx) }
370 query check_mod_liveness(key: DefId) -> () {
371 desc { |tcx| "checking liveness of variables in {}", key.describe_as_module(tcx) }
374 query check_mod_impl_wf(key: DefId) -> () {
375 desc { |tcx| "checking that impls are well-formed in {}", key.describe_as_module(tcx) }
378 query collect_mod_item_types(key: DefId) -> () {
379 desc { |tcx| "collecting item types in {}", key.describe_as_module(tcx) }
382 /// Caches `CoerceUnsized` kinds for impls on custom types.
383 query coerce_unsized_info(_: DefId)
384 -> ty::adjustment::CoerceUnsizedInfo {}
388 query typeck_item_bodies(_: CrateNum) -> () {
389 desc { "type-checking all item bodies" }
392 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
393 cache_on_disk_if { key.is_local() }
394 load_cached(tcx, id) {
395 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
396 .queries.on_disk_cache
397 .try_load_query_result(tcx, id);
399 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
405 query used_trait_imports(key: DefId) -> &'tcx DefIdSet {
406 cache_on_disk_if { key.is_local() }
411 query has_typeck_tables(_: DefId) -> bool {}
413 query coherent_trait(def_id: DefId) -> () {
414 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
419 /// Borrow-checks the function body. If this is a closure, returns
420 /// additional requirements that the closure's creator must verify.
421 query mir_borrowck(key: DefId) -> mir::BorrowCheckResult<'tcx> {
422 cache_on_disk_if(tcx, _) { key.is_local() && tcx.is_closure(key) }
427 /// Gets a complete map from all types to their inherent impls.
428 /// Not meant to be used directly outside of coherence.
429 /// (Defined only for `LOCAL_CRATE`.)
430 query crate_inherent_impls(k: CrateNum)
431 -> &'tcx CrateInherentImpls {
433 desc { "all inherent impls defined in crate `{:?}`", k }
436 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
437 /// Not meant to be used directly outside of coherence.
438 /// (Defined only for `LOCAL_CRATE`.)
439 query crate_inherent_impls_overlap_check(_: CrateNum)
442 desc { "check for overlap between inherent impls defined in this crate" }
447 /// Evaluates a constant without running sanity checks.
449 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
450 /// during validation. Please add a comment to every use site explaining why using
451 /// `const_eval` isn't sufficient.
452 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
453 -> ConstEvalRawResult<'tcx> {
456 "const-evaluating `{}`",
457 tcx.def_path_str(key.value.instance.def.def_id())
461 /// Results of evaluating const items or constants embedded in
462 /// other items (such as enum variant explicit discriminants).
463 query const_eval(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
464 -> ConstEvalResult<'tcx> {
467 "const-evaluating + checking `{}`",
468 tcx.def_path_str(key.value.instance.def.def_id())
470 cache_on_disk_if(_, opt_result) {
471 // Only store results without errors
472 opt_result.map_or(true, |r| r.is_ok())
476 /// Extracts a field of a (variant of a) const.
478 key: ty::ParamEnvAnd<'tcx, (&'tcx ty::Const<'tcx>, mir::Field)>
479 ) -> &'tcx ty::Const<'tcx> {
481 desc { "extract field of const" }
484 query const_caller_location(key: (syntax_pos::Symbol, u32, u32)) -> &'tcx ty::Const<'tcx> {
486 desc { "get a &core::panic::Location referring to a span" }
491 query check_match(key: DefId) {
492 cache_on_disk_if { key.is_local() }
495 /// Performs part of the privacy check and computes "access levels".
496 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
498 desc { "privacy access levels" }
500 query check_private_in_public(_: CrateNum) -> () {
502 desc { "checking for private elements in public interfaces" }
507 query reachable_set(_: CrateNum) -> ReachableSet {
508 desc { "reachability" }
511 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
512 /// in the case of closures, this will be redirected to the enclosing function.
513 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
515 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::BodyAndCache<'tcx> {
517 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
520 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
522 desc { "computing the symbol for `{}`", key }
523 cache_on_disk_if { true }
526 query def_kind(_: DefId) -> Option<DefKind> {}
527 query def_span(_: DefId) -> Span {
528 // FIXME(mw): DefSpans are not really inputs since they are derived from
529 // HIR. But at the moment HIR hashing still contains some hacks that allow
530 // to make type debuginfo to be source location independent. Declaring
531 // DefSpan an input makes sure that changes to these are always detected
532 // regardless of HIR hashing.
535 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
536 query lookup_const_stability(_: DefId) -> Option<&'tcx attr::ConstStability> {}
537 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
538 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
542 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {
543 cache_on_disk_if { true }
548 query fn_arg_names(_: DefId) -> Vec<ast::Name> {}
549 /// Gets the rendered value of the specified constant or associated constant.
551 query rendered_const(_: DefId) -> String {}
552 query impl_parent(_: DefId) -> Option<DefId> {}
556 query trait_of_item(_: DefId) -> Option<DefId> {}
560 query is_mir_available(key: DefId) -> bool {
561 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
566 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
567 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
569 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
574 query codegen_fulfill_obligation(
575 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
576 ) -> Vtable<'tcx, ()> {
578 cache_on_disk_if { true }
580 "checking if `{}` fulfills its obligations",
581 tcx.def_path_str(key.1.def_id())
587 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
588 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
590 query specialization_graph_of(_: DefId) -> &'tcx specialization_graph::Graph {
591 cache_on_disk_if { true }
593 query is_object_safe(key: DefId) -> bool {
594 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
597 /// Gets the ParameterEnvironment for a given item; this environment
598 /// will be in "user-facing" mode, meaning that it is suitabe for
599 /// type-checking etc, and it does not normalize specializable
600 /// associated types. This is almost always what you want,
601 /// unless you are doing MIR optimizations, in which case you
602 /// might want to use `reveal_all()` method to change modes.
603 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
605 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
606 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
607 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
609 desc { "computing whether `{}` is `Copy`", env.value }
611 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
613 desc { "computing whether `{}` is `Sized`", env.value }
615 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
617 desc { "computing whether `{}` is freeze", env.value }
620 // The cycle error here should be reported as an error by `check_representable`.
621 // We consider the type as not needing drop in the meanwhile to avoid
622 // further errors (done in impl Value for NeedsDrop).
623 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
624 // in case we accidentally otherwise don't emit an error.
625 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> NeedsDrop {
628 desc { "computing whether `{}` needs drop", env.value }
632 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
633 ) -> Result<&'tcx ty::layout::LayoutDetails, ty::layout::LayoutError<'tcx>> {
635 desc { "computing layout of `{}`", env.value }
640 query dylib_dependency_formats(_: CrateNum)
641 -> &'tcx [(CrateNum, LinkagePreference)] {
642 desc { "dylib dependency formats of crate" }
645 query dependency_formats(_: CrateNum)
646 -> Lrc<crate::middle::dependency_format::Dependencies>
648 desc { "get the linkage format of all dependencies" }
653 query is_compiler_builtins(_: CrateNum) -> bool {
655 desc { "checking if the crate is_compiler_builtins" }
657 query has_global_allocator(_: CrateNum) -> bool {
659 desc { "checking if the crate has_global_allocator" }
661 query has_panic_handler(_: CrateNum) -> bool {
663 desc { "checking if the crate has_panic_handler" }
665 query is_sanitizer_runtime(_: CrateNum) -> bool {
667 desc { "query a crate is `#![sanitizer_runtime]`" }
669 query is_profiler_runtime(_: CrateNum) -> bool {
671 desc { "query a crate is `#![profiler_runtime]`" }
673 query panic_strategy(_: CrateNum) -> PanicStrategy {
675 desc { "query a crate's configured panic strategy" }
677 query is_no_builtins(_: CrateNum) -> bool {
679 desc { "test whether a crate has `#![no_builtins]`" }
681 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
683 desc { "query a crate's symbol mangling version" }
686 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
688 desc { "getting crate's ExternCrateData" }
693 query specializes(_: (DefId, DefId)) -> bool {
695 desc { "computing whether impls specialize one another" }
697 query in_scope_traits_map(_: DefIndex)
698 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
700 desc { "traits in scope at a block" }
705 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
711 query impl_defaultness(_: DefId) -> hir::Defaultness {}
713 query check_item_well_formed(_: DefId) -> () {}
714 query check_trait_item_well_formed(_: DefId) -> () {}
715 query check_impl_item_well_formed(_: DefId) -> () {}
719 // The `DefId`s of all non-generic functions and statics in the given crate
720 // that can be reached from outside the crate.
722 // We expect this items to be available for being linked to.
724 // This query can also be called for `LOCAL_CRATE`. In this case it will
725 // compute which items will be reachable to other crates, taking into account
726 // the kind of crate that is currently compiled. Crates with only a
727 // C interface have fewer reachable things.
729 // Does not include external symbols that don't have a corresponding DefId,
730 // like the compiler-generated `main` function and so on.
731 query reachable_non_generics(_: CrateNum)
732 -> &'tcx DefIdMap<SymbolExportLevel> {
733 desc { "looking up the exported symbols of a crate" }
735 query is_reachable_non_generic(_: DefId) -> bool {}
736 query is_unreachable_local_definition(_: DefId) -> bool {}
740 query upstream_monomorphizations(
742 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
743 desc { "collecting available upstream monomorphizations `{:?}`", k }
745 query upstream_monomorphizations_for(_: DefId)
746 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
750 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
751 desc { "looking up the foreign modules of a linked crate" }
754 /// Identifies the entry-point (e.g., the `main` function) for a given
755 /// crate, returning `None` if there is no entry point (such as for library crates).
756 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
757 desc { "looking up the entry function of a crate" }
759 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
760 desc { "looking up the plugin registrar for a crate" }
762 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
763 desc { "looking up the derive registrar for a crate" }
765 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
767 desc { "looking up the disambiguator a crate" }
769 query crate_hash(_: CrateNum) -> Svh {
771 desc { "looking up the hash a crate" }
773 query crate_host_hash(_: CrateNum) -> Option<Svh> {
775 desc { "looking up the hash of a host version of a crate" }
777 query original_crate_name(_: CrateNum) -> Symbol {
779 desc { "looking up the original name a crate" }
781 query extra_filename(_: CrateNum) -> String {
783 desc { "looking up the extra filename for a crate" }
788 query implementations_of_trait(_: (CrateNum, DefId))
791 desc { "looking up implementations of a trait in a crate" }
793 query all_trait_implementations(_: CrateNum)
795 desc { "looking up all (?) trait implementations" }
800 query dllimport_foreign_items(_: CrateNum)
801 -> &'tcx FxHashSet<DefId> {
802 desc { "dllimport_foreign_items" }
804 query is_dllimport_foreign_item(_: DefId) -> bool {}
805 query is_statically_included_foreign_item(_: DefId) -> bool {}
806 query native_library_kind(_: DefId)
807 -> Option<NativeLibraryKind> {}
811 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
813 desc { "looking up link arguments for a crate" }
818 /// Lifetime resolution. See `middle::resolve_lifetimes`.
819 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
820 desc { "resolving lifetimes" }
822 query named_region_map(_: DefIndex) ->
823 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
824 desc { "looking up a named region" }
826 query is_late_bound_map(_: DefIndex) ->
827 Option<&'tcx FxHashSet<ItemLocalId>> {
828 desc { "testing if a region is late bound" }
830 query object_lifetime_defaults_map(_: DefIndex)
831 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
832 desc { "looking up lifetime defaults for a region" }
837 query visibility(_: DefId) -> ty::Visibility {}
841 query dep_kind(_: CrateNum) -> DepKind {
843 desc { "fetching what a dependency looks like" }
845 query crate_name(_: CrateNum) -> Symbol {
847 desc { "fetching what a crate is named" }
849 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
850 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
852 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
854 desc { "calculating the lib features map" }
856 query defined_lib_features(_: CrateNum)
857 -> &'tcx [(Symbol, Option<Symbol>)] {
858 desc { "calculating the lib features defined in a crate" }
860 /// Returns the lang items defined in another crate by loading it from metadata.
861 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
863 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
865 desc { "calculating the lang items map" }
868 /// Returns all diagnostic items defined in all crates.
869 query all_diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
871 desc { "calculating the diagnostic items map" }
874 /// Returns the lang items defined in another crate by loading it from metadata.
875 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
876 desc { "calculating the lang items defined in a crate" }
879 /// Returns the diagnostic items defined in a crate.
880 query diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
881 desc { "calculating the diagnostic items map in a crate" }
884 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
885 desc { "calculating the missing lang items in a crate" }
887 query visible_parent_map(_: CrateNum)
888 -> &'tcx DefIdMap<DefId> {
889 desc { "calculating the visible parent map" }
891 query missing_extern_crate_item(_: CrateNum) -> bool {
893 desc { "seeing if we're missing an `extern crate` item for this crate" }
895 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
897 desc { "looking at the source for a crate" }
899 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
901 desc { "generating a postorder list of CrateNums" }
904 query upvars(_: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
907 query maybe_unused_trait_import(_: DefId) -> bool {
910 query maybe_unused_extern_crates(_: CrateNum)
911 -> &'tcx [(DefId, Span)] {
913 desc { "looking up all possibly unused extern crates" }
915 query names_imported_by_glob_use(_: DefId)
916 -> Lrc<FxHashSet<ast::Name>> {
920 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
922 desc { "calculating the stability index for the local crate" }
924 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
926 desc { "fetching all foreign CrateNum instances" }
929 /// A vector of every trait accessible in the whole crate
930 /// (i.e., including those from subcrates). This is used only for
932 query all_traits(_: CrateNum) -> &'tcx [DefId] {
933 desc { "fetching all foreign and local traits" }
938 query exported_symbols(_: CrateNum)
939 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
940 desc { "exported_symbols" }
945 query collect_and_partition_mono_items(_: CrateNum)
946 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
948 desc { "collect_and_partition_mono_items" }
950 query is_codegened_item(_: DefId) -> bool {}
951 query codegen_unit(_: Symbol) -> Arc<CodegenUnit<'tcx>> {
953 desc { "codegen_unit" }
955 query backend_optimization_level(_: CrateNum) -> OptLevel {
956 desc { "optimization level used by backend" }
961 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
963 desc { "output_filenames" }
968 /// Do not call this query directly: invoke `normalize` instead.
969 query normalize_projection_ty(
970 goal: CanonicalProjectionGoal<'tcx>
972 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
976 desc { "normalizing `{:?}`", goal }
979 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
980 query normalize_ty_after_erasing_regions(
981 goal: ParamEnvAnd<'tcx, Ty<'tcx>>
984 desc { "normalizing `{:?}`", goal }
987 query implied_outlives_bounds(
988 goal: CanonicalTyGoal<'tcx>
990 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
994 desc { "computing implied outlives bounds for `{:?}`", goal }
997 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
998 query dropck_outlives(
999 goal: CanonicalTyGoal<'tcx>
1001 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1005 desc { "computing dropck types for `{:?}`", goal }
1008 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1009 /// `infcx.predicate_must_hold()` instead.
1010 query evaluate_obligation(
1011 goal: CanonicalPredicateGoal<'tcx>
1012 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1014 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1017 query evaluate_goal(
1018 goal: traits::ChalkCanonicalGoal<'tcx>
1020 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1024 desc { "evaluating trait selection obligation `{}`", goal.value.goal }
1027 /// Do not call this query directly: part of the `Eq` type-op
1028 query type_op_ascribe_user_type(
1029 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1031 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1035 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1038 /// Do not call this query directly: part of the `Eq` type-op
1040 goal: CanonicalTypeOpEqGoal<'tcx>
1042 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1046 desc { "evaluating `type_op_eq` `{:?}`", goal }
1049 /// Do not call this query directly: part of the `Subtype` type-op
1050 query type_op_subtype(
1051 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1053 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1057 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1060 /// Do not call this query directly: part of the `ProvePredicate` type-op
1061 query type_op_prove_predicate(
1062 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1064 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1068 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1071 /// Do not call this query directly: part of the `Normalize` type-op
1072 query type_op_normalize_ty(
1073 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1075 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1079 desc { "normalizing `{:?}`", goal }
1082 /// Do not call this query directly: part of the `Normalize` type-op
1083 query type_op_normalize_predicate(
1084 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1086 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1090 desc { "normalizing `{:?}`", goal }
1093 /// Do not call this query directly: part of the `Normalize` type-op
1094 query type_op_normalize_poly_fn_sig(
1095 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1097 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1101 desc { "normalizing `{:?}`", goal }
1104 /// Do not call this query directly: part of the `Normalize` type-op
1105 query type_op_normalize_fn_sig(
1106 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1108 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1112 desc { "normalizing `{:?}`", goal }
1115 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1118 "testing substituted normalized predicates:`{}`",
1119 tcx.def_path_str(key.0)
1123 query method_autoderef_steps(
1124 goal: CanonicalTyGoal<'tcx>
1125 ) -> MethodAutoderefStepsResult<'tcx> {
1127 desc { "computing autoderef types for `{:?}`", goal }
1132 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1134 desc { "looking up the whitelist of target features" }
1137 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1138 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1141 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1144 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1146 desc { "looking up enabled feature gates" }