1 use crate::dep_graph::{DepKind, DepNode, RecoverKey, SerializedDepNodeIndex};
2 use crate::hir::def_id::{CrateNum, DefId, DefIndex};
4 use crate::mir::interpret::GlobalId;
6 use crate::traits::query::{
7 CanonicalPredicateGoal, CanonicalProjectionGoal, CanonicalTyGoal,
8 CanonicalTypeOpAscribeUserTypeGoal, CanonicalTypeOpEqGoal, CanonicalTypeOpNormalizeGoal,
9 CanonicalTypeOpProvePredicateGoal, CanonicalTypeOpSubtypeGoal,
11 use crate::ty::query::queries;
12 use crate::ty::query::QueryDescription;
13 use crate::ty::subst::SubstsRef;
14 use crate::ty::{self, ParamEnvAnd, Ty, TyCtxt};
17 use syntax_pos::symbol::Symbol;
19 // Each of these queries corresponds to a function pointer field in the
20 // `Providers` struct for requesting a value of that type, and a method
21 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
22 // which memoizes and does dep-graph tracking, wrapping around the actual
23 // `Providers` that the driver creates (using several `rustc_*` crates).
25 // The result type of each query must implement `Clone`, and additionally
26 // `ty::query::values::Value`, which produces an appropriate placeholder
27 // (error) value if the query resulted in a query cycle.
28 // Queries marked with `fatal_cycle` do not need the latter implementation,
29 // as they will raise an fatal error on query cycles instead.
32 query trigger_delay_span_bug(key: DefId) -> () {
33 desc { "trigger a delay span bug" }
38 /// Records the type of every item.
39 query type_of(key: DefId) -> Ty<'tcx> {
40 cache_on_disk_if { key.is_local() }
43 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
44 /// associated generics.
45 query generics_of(key: DefId) -> &'tcx ty::Generics {
46 cache_on_disk_if { key.is_local() }
47 load_cached(tcx, id) {
48 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
49 .try_load_query_result(tcx, id);
50 generics.map(|x| &*tcx.arena.alloc(x))
54 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
55 /// predicates (where-clauses) that must be proven true in order
56 /// to reference it. This is almost always the "predicates query"
59 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
60 /// it is almost always the same as that query, except for the
61 /// case of traits. For traits, `predicates_of` contains
62 /// an additional `Self: Trait<...>` predicate that users don't
63 /// actually write. This reflects the fact that to invoke the
64 /// trait (e.g., via `Default::default`) you must supply types
65 /// that actually implement the trait. (However, this extra
66 /// predicate gets in the way of some checks, which are intended
67 /// to operate over only the actual where-clauses written by the
69 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
70 cache_on_disk_if { key.is_local() }
73 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
74 desc { "looking up the native libraries of a linked crate" }
77 query lint_levels(_: CrateNum) -> &'tcx lint::LintLevelMap {
79 desc { "computing the lint levels for items in this crate" }
84 query is_panic_runtime(_: CrateNum) -> bool {
86 desc { "checking if the crate is_panic_runtime" }
91 /// Set of all the `DefId`s in this crate that have MIR associated with
92 /// them. This includes all the body owners, but also things like struct
94 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
95 desc { "getting a list of all mir_keys" }
98 /// Maps DefId's that have an associated `mir::Body` to the result
99 /// of the MIR const-checking pass. This is the set of qualifs in
100 /// the final value of a `const`.
101 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
102 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
103 cache_on_disk_if { key.is_local() }
106 /// Fetch the MIR for a given `DefId` right after it's built - this includes
107 /// unreachable code.
108 query mir_built(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {}
110 /// Fetch the MIR for a given `DefId` up till the point where it is
111 /// ready for const evaluation.
113 /// See the README for the `mir` module for details.
114 query mir_const(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {
118 query mir_validated(_: DefId) ->
120 &'tcx Steal<mir::BodyAndCache<'tcx>>,
121 &'tcx Steal<IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>>>
126 /// MIR after our optimization passes have run. This is MIR that is ready
127 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
128 query optimized_mir(key: DefId) -> &'tcx mir::BodyAndCache<'tcx> {
129 cache_on_disk_if { key.is_local() }
130 load_cached(tcx, id) {
131 let mir: Option<crate::mir::BodyAndCache<'tcx>>
132 = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
134 let cache = tcx.arena.alloc(x);
135 cache.ensure_predecessors();
141 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>> {
142 cache_on_disk_if { key.is_local() }
143 load_cached(tcx, id) {
144 let promoted: Option<
145 rustc_index::vec::IndexVec<
146 crate::mir::Promoted,
147 crate::mir::BodyAndCache<'tcx>
148 >> = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
150 let cache = tcx.arena.alloc(p);
151 for body in cache.iter_mut() {
152 body.ensure_predecessors();
161 // Erases regions from `ty` to yield a new type.
162 // Normally you would just use `tcx.erase_regions(&value)`,
163 // however, which uses this query as a kind of cache.
164 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
165 // This query is not expected to have input -- as a result, it
166 // is not a good candidates for "replay" because it is essentially a
167 // pure function of its input (and hence the expectation is that
168 // no caller would be green **apart** from just these
169 // queries). Making it anonymous avoids hashing the result, which
170 // may save a bit of time.
173 desc { "erasing regions from `{:?}`", ty }
176 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
177 desc { "generating chalk-style clauses" }
180 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
182 desc { "generating chalk-style clauses for environment" }
185 // Get the chalk-style environment of the given item.
186 query environment(_: DefId) -> traits::Environment<'tcx> {
187 desc { "return a chalk-style environment" }
192 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
193 desc { "wasm import module map" }
198 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
199 /// predicates (where-clauses) directly defined on it. This is
200 /// equal to the `explicit_predicates_of` predicates plus the
201 /// `inferred_outlives_of` predicates.
202 query predicates_defined_on(_: DefId) -> ty::GenericPredicates<'tcx> {}
204 /// Returns the predicates written explicitly by the user.
205 query explicit_predicates_of(_: DefId) -> ty::GenericPredicates<'tcx> {}
207 /// Returns the inferred outlives predicates (e.g., for `struct
208 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
209 query inferred_outlives_of(_: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {}
211 /// Maps from the `DefId` of a trait to the list of
212 /// super-predicates. This is a subset of the full list of
213 /// predicates. We store these in a separate map because we must
214 /// evaluate them even during type conversion, often before the
215 /// full predicates are available (note that supertraits have
216 /// additional acyclicity requirements).
217 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
218 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
221 /// To avoid cycles within the predicates of a single item we compute
222 /// per-type-parameter predicates for resolving `T::AssocTy`.
223 query type_param_predicates(key: (DefId, DefId)) -> ty::GenericPredicates<'tcx> {
225 desc { |tcx| "computing the bounds for type parameter `{}`", {
226 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
227 tcx.hir().ty_param_name(id)
231 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
232 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
233 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
235 // The cycle error here should be reported as an error by `check_representable`.
236 // We consider the type as Sized in the meanwhile to avoid
237 // further errors (done in impl Value for AdtSizedConstraint).
238 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
239 // in case we accidentally otherwise don't emit an error.
240 query adt_sized_constraint(
242 ) -> AdtSizedConstraint<'tcx> {
246 query adt_dtorck_constraint(
248 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
250 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
251 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
252 /// not have the feature gate active).
254 /// **Do not call this function manually.** It is only meant to cache the base data for the
255 /// `is_const_fn` function.
256 query is_const_fn_raw(key: DefId) -> bool {
257 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
260 query asyncness(key: DefId) -> hir::IsAsync {
261 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
264 /// Returns `true` if calls to the function may be promoted.
266 /// This is either because the function is e.g., a tuple-struct or tuple-variant
267 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
268 /// be removed in the future in favour of some form of check which figures out whether the
269 /// function does not inspect the bits of any of its arguments (so is essentially just a
270 /// constructor function).
271 query is_promotable_const_fn(_: DefId) -> bool {}
273 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
275 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
276 query is_foreign_item(_: DefId) -> bool {}
278 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
279 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
281 /// Gets a map with the variance of every item; use `item_variance` instead.
282 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
283 desc { "computing the variances for items in this crate" }
286 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
287 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
291 /// Maps from thee `DefId` of a type to its (inferred) outlives.
292 query inferred_outlives_crate(_: CrateNum)
293 -> &'tcx ty::CratePredicatesMap<'tcx> {
294 desc { "computing the inferred outlives predicates for items in this crate" }
299 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
300 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
302 /// Maps from a trait item to the trait item "descriptor".
303 query associated_item(_: DefId) -> ty::AssocItem {}
305 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
306 query impl_polarity(_: DefId) -> ty::ImplPolarity {}
308 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
312 /// Maps a `DefId` of a type to a list of its inherent impls.
313 /// Contains implementations of methods that are inherent to a type.
314 /// Methods in these implementations don't need to be exported.
315 query inherent_impls(_: DefId) -> &'tcx [DefId] {
321 /// The result of unsafety-checking this `DefId`.
322 query unsafety_check_result(key: DefId) -> mir::UnsafetyCheckResult {
323 cache_on_disk_if { key.is_local() }
326 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
327 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
329 /// The signature of functions and closures.
330 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
334 query lint_mod(key: DefId) -> () {
335 desc { |tcx| "linting {}", key.describe_as_module(tcx) }
338 /// Checks the attributes in the module.
339 query check_mod_attrs(key: DefId) -> () {
340 desc { |tcx| "checking attributes in {}", key.describe_as_module(tcx) }
343 query check_mod_unstable_api_usage(key: DefId) -> () {
344 desc { |tcx| "checking for unstable API usage in {}", key.describe_as_module(tcx) }
347 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
348 query check_mod_const_bodies(key: DefId) -> () {
349 desc { |tcx| "checking consts in {}", key.describe_as_module(tcx) }
352 /// Checks the loops in the module.
353 query check_mod_loops(key: DefId) -> () {
354 desc { |tcx| "checking loops in {}", key.describe_as_module(tcx) }
357 query check_mod_item_types(key: DefId) -> () {
358 desc { |tcx| "checking item types in {}", key.describe_as_module(tcx) }
361 query check_mod_privacy(key: DefId) -> () {
362 desc { |tcx| "checking privacy in {}", key.describe_as_module(tcx) }
365 query check_mod_intrinsics(key: DefId) -> () {
366 desc { |tcx| "checking intrinsics in {}", key.describe_as_module(tcx) }
369 query check_mod_liveness(key: DefId) -> () {
370 desc { |tcx| "checking liveness of variables in {}", key.describe_as_module(tcx) }
373 query check_mod_impl_wf(key: DefId) -> () {
374 desc { |tcx| "checking that impls are well-formed in {}", key.describe_as_module(tcx) }
377 query collect_mod_item_types(key: DefId) -> () {
378 desc { |tcx| "collecting item types in {}", key.describe_as_module(tcx) }
381 /// Caches `CoerceUnsized` kinds for impls on custom types.
382 query coerce_unsized_info(_: DefId)
383 -> ty::adjustment::CoerceUnsizedInfo {}
387 query typeck_item_bodies(_: CrateNum) -> () {
388 desc { "type-checking all item bodies" }
391 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
392 cache_on_disk_if { key.is_local() }
393 load_cached(tcx, id) {
394 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
395 .queries.on_disk_cache
396 .try_load_query_result(tcx, id);
398 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
404 query used_trait_imports(key: DefId) -> &'tcx DefIdSet {
405 cache_on_disk_if { key.is_local() }
410 query has_typeck_tables(_: DefId) -> bool {}
412 query coherent_trait(def_id: DefId) -> () {
413 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
418 /// Borrow-checks the function body. If this is a closure, returns
419 /// additional requirements that the closure's creator must verify.
420 query mir_borrowck(key: DefId) -> mir::BorrowCheckResult<'tcx> {
421 cache_on_disk_if(tcx, _) { key.is_local() && tcx.is_closure(key) }
426 /// Gets a complete map from all types to their inherent impls.
427 /// Not meant to be used directly outside of coherence.
428 /// (Defined only for `LOCAL_CRATE`.)
429 query crate_inherent_impls(k: CrateNum)
430 -> &'tcx CrateInherentImpls {
432 desc { "all inherent impls defined in crate `{:?}`", k }
435 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
436 /// Not meant to be used directly outside of coherence.
437 /// (Defined only for `LOCAL_CRATE`.)
438 query crate_inherent_impls_overlap_check(_: CrateNum)
441 desc { "check for overlap between inherent impls defined in this crate" }
446 /// Evaluates a constant without running sanity checks.
448 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
449 /// during validation. Please add a comment to every use site explaining why using
450 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
451 /// form to be used outside of const eval.
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).
464 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
465 /// returns a proper constant that is usable by the rest of the compiler.
467 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
468 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_promoted`.
469 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
470 -> ConstEvalResult<'tcx> {
473 "const-evaluating + checking `{}`",
474 tcx.def_path_str(key.value.instance.def.def_id())
476 cache_on_disk_if(_, opt_result) {
477 // Only store results without errors
478 opt_result.map_or(true, |r| r.is_ok())
482 /// Extracts a field of a (variant of a) const.
484 key: ty::ParamEnvAnd<'tcx, (&'tcx ty::Const<'tcx>, mir::Field)>
485 ) -> &'tcx ty::Const<'tcx> {
487 desc { "extract field of const" }
490 query const_caller_location(key: (syntax_pos::Symbol, u32, u32)) -> &'tcx ty::Const<'tcx> {
492 desc { "get a &core::panic::Location referring to a span" }
497 query check_match(key: DefId) {
498 cache_on_disk_if { key.is_local() }
501 /// Performs part of the privacy check and computes "access levels".
502 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
504 desc { "privacy access levels" }
506 query check_private_in_public(_: CrateNum) -> () {
508 desc { "checking for private elements in public interfaces" }
513 query reachable_set(_: CrateNum) -> ReachableSet {
514 desc { "reachability" }
517 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
518 /// in the case of closures, this will be redirected to the enclosing function.
519 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
521 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::BodyAndCache<'tcx> {
523 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
526 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
528 desc { "computing the symbol for `{}`", key }
529 cache_on_disk_if { true }
532 query def_kind(_: DefId) -> Option<DefKind> {}
533 query def_span(_: DefId) -> Span {
534 // FIXME(mw): DefSpans are not really inputs since they are derived from
535 // HIR. But at the moment HIR hashing still contains some hacks that allow
536 // to make type debuginfo to be source location independent. Declaring
537 // DefSpan an input makes sure that changes to these are always detected
538 // regardless of HIR hashing.
541 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
542 query lookup_const_stability(_: DefId) -> Option<&'tcx attr::ConstStability> {}
543 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
544 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
548 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {
549 cache_on_disk_if { true }
554 query fn_arg_names(_: DefId) -> Vec<ast::Name> {}
555 /// Gets the rendered value of the specified constant or associated constant.
557 query rendered_const(_: DefId) -> String {}
558 query impl_parent(_: DefId) -> Option<DefId> {}
562 query trait_of_item(_: DefId) -> Option<DefId> {}
566 query is_mir_available(key: DefId) -> bool {
567 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
572 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
573 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
575 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
580 query codegen_fulfill_obligation(
581 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
582 ) -> Vtable<'tcx, ()> {
584 cache_on_disk_if { true }
586 "checking if `{}` fulfills its obligations",
587 tcx.def_path_str(key.1.def_id())
593 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
594 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
596 query specialization_graph_of(_: DefId) -> &'tcx specialization_graph::Graph {
597 cache_on_disk_if { true }
599 query is_object_safe(key: DefId) -> bool {
600 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
603 /// Gets the ParameterEnvironment for a given item; this environment
604 /// will be in "user-facing" mode, meaning that it is suitabe for
605 /// type-checking etc, and it does not normalize specializable
606 /// associated types. This is almost always what you want,
607 /// unless you are doing MIR optimizations, in which case you
608 /// might want to use `reveal_all()` method to change modes.
609 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
611 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
612 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
613 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
615 desc { "computing whether `{}` is `Copy`", env.value }
617 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
619 desc { "computing whether `{}` is `Sized`", env.value }
621 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
623 desc { "computing whether `{}` is freeze", env.value }
626 // The cycle error here should be reported as an error by `check_representable`.
627 // We consider the type as not needing drop in the meanwhile to avoid
628 // further errors (done in impl Value for NeedsDrop).
629 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
630 // in case we accidentally otherwise don't emit an error.
631 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> NeedsDrop {
634 desc { "computing whether `{}` needs drop", env.value }
638 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
639 ) -> Result<&'tcx ty::layout::LayoutDetails, ty::layout::LayoutError<'tcx>> {
641 desc { "computing layout of `{}`", env.value }
646 query dylib_dependency_formats(_: CrateNum)
647 -> &'tcx [(CrateNum, LinkagePreference)] {
648 desc { "dylib dependency formats of crate" }
651 query dependency_formats(_: CrateNum)
652 -> Lrc<crate::middle::dependency_format::Dependencies>
654 desc { "get the linkage format of all dependencies" }
659 query is_compiler_builtins(_: CrateNum) -> bool {
661 desc { "checking if the crate is_compiler_builtins" }
663 query has_global_allocator(_: CrateNum) -> bool {
665 desc { "checking if the crate has_global_allocator" }
667 query has_panic_handler(_: CrateNum) -> bool {
669 desc { "checking if the crate has_panic_handler" }
671 query is_sanitizer_runtime(_: CrateNum) -> bool {
673 desc { "query a crate is `#![sanitizer_runtime]`" }
675 query is_profiler_runtime(_: CrateNum) -> bool {
677 desc { "query a crate is `#![profiler_runtime]`" }
679 query panic_strategy(_: CrateNum) -> PanicStrategy {
681 desc { "query a crate's configured panic strategy" }
683 query is_no_builtins(_: CrateNum) -> bool {
685 desc { "test whether a crate has `#![no_builtins]`" }
687 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
689 desc { "query a crate's symbol mangling version" }
692 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
694 desc { "getting crate's ExternCrateData" }
699 query specializes(_: (DefId, DefId)) -> bool {
701 desc { "computing whether impls specialize one another" }
703 query in_scope_traits_map(_: DefIndex)
704 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
706 desc { "traits in scope at a block" }
711 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
717 query impl_defaultness(_: DefId) -> hir::Defaultness {}
719 query check_item_well_formed(_: DefId) -> () {}
720 query check_trait_item_well_formed(_: DefId) -> () {}
721 query check_impl_item_well_formed(_: DefId) -> () {}
725 // The `DefId`s of all non-generic functions and statics in the given crate
726 // that can be reached from outside the crate.
728 // We expect this items to be available for being linked to.
730 // This query can also be called for `LOCAL_CRATE`. In this case it will
731 // compute which items will be reachable to other crates, taking into account
732 // the kind of crate that is currently compiled. Crates with only a
733 // C interface have fewer reachable things.
735 // Does not include external symbols that don't have a corresponding DefId,
736 // like the compiler-generated `main` function and so on.
737 query reachable_non_generics(_: CrateNum)
738 -> &'tcx DefIdMap<SymbolExportLevel> {
739 desc { "looking up the exported symbols of a crate" }
741 query is_reachable_non_generic(_: DefId) -> bool {}
742 query is_unreachable_local_definition(_: DefId) -> bool {}
746 query upstream_monomorphizations(
748 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
749 desc { "collecting available upstream monomorphizations `{:?}`", k }
751 query upstream_monomorphizations_for(_: DefId)
752 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
756 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
757 desc { "looking up the foreign modules of a linked crate" }
760 /// Identifies the entry-point (e.g., the `main` function) for a given
761 /// crate, returning `None` if there is no entry point (such as for library crates).
762 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
763 desc { "looking up the entry function of a crate" }
765 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
766 desc { "looking up the plugin registrar for a crate" }
768 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
769 desc { "looking up the derive registrar for a crate" }
771 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
773 desc { "looking up the disambiguator a crate" }
775 query crate_hash(_: CrateNum) -> Svh {
777 desc { "looking up the hash a crate" }
779 query crate_host_hash(_: CrateNum) -> Option<Svh> {
781 desc { "looking up the hash of a host version of a crate" }
783 query original_crate_name(_: CrateNum) -> Symbol {
785 desc { "looking up the original name a crate" }
787 query extra_filename(_: CrateNum) -> String {
789 desc { "looking up the extra filename for a crate" }
794 query implementations_of_trait(_: (CrateNum, DefId))
797 desc { "looking up implementations of a trait in a crate" }
799 query all_trait_implementations(_: CrateNum)
801 desc { "looking up all (?) trait implementations" }
806 query dllimport_foreign_items(_: CrateNum)
807 -> &'tcx FxHashSet<DefId> {
808 desc { "dllimport_foreign_items" }
810 query is_dllimport_foreign_item(_: DefId) -> bool {}
811 query is_statically_included_foreign_item(_: DefId) -> bool {}
812 query native_library_kind(_: DefId)
813 -> Option<NativeLibraryKind> {}
817 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
819 desc { "looking up link arguments for a crate" }
824 /// Lifetime resolution. See `middle::resolve_lifetimes`.
825 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
826 desc { "resolving lifetimes" }
828 query named_region_map(_: DefIndex) ->
829 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
830 desc { "looking up a named region" }
832 query is_late_bound_map(_: DefIndex) ->
833 Option<&'tcx FxHashSet<ItemLocalId>> {
834 desc { "testing if a region is late bound" }
836 query object_lifetime_defaults_map(_: DefIndex)
837 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
838 desc { "looking up lifetime defaults for a region" }
843 query visibility(_: DefId) -> ty::Visibility {}
847 query dep_kind(_: CrateNum) -> DepKind {
849 desc { "fetching what a dependency looks like" }
851 query crate_name(_: CrateNum) -> Symbol {
853 desc { "fetching what a crate is named" }
855 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
856 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
858 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
860 desc { "calculating the lib features map" }
862 query defined_lib_features(_: CrateNum)
863 -> &'tcx [(Symbol, Option<Symbol>)] {
864 desc { "calculating the lib features defined in a crate" }
866 /// Returns the lang items defined in another crate by loading it from metadata.
867 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
869 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
871 desc { "calculating the lang items map" }
874 /// Returns all diagnostic items defined in all crates.
875 query all_diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
877 desc { "calculating the diagnostic items map" }
880 /// Returns the lang items defined in another crate by loading it from metadata.
881 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
882 desc { "calculating the lang items defined in a crate" }
885 /// Returns the diagnostic items defined in a crate.
886 query diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
887 desc { "calculating the diagnostic items map in a crate" }
890 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
891 desc { "calculating the missing lang items in a crate" }
893 query visible_parent_map(_: CrateNum)
894 -> &'tcx DefIdMap<DefId> {
895 desc { "calculating the visible parent map" }
897 query missing_extern_crate_item(_: CrateNum) -> bool {
899 desc { "seeing if we're missing an `extern crate` item for this crate" }
901 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
903 desc { "looking at the source for a crate" }
905 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
907 desc { "generating a postorder list of CrateNums" }
910 query upvars(_: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
913 query maybe_unused_trait_import(_: DefId) -> bool {
916 query maybe_unused_extern_crates(_: CrateNum)
917 -> &'tcx [(DefId, Span)] {
919 desc { "looking up all possibly unused extern crates" }
921 query names_imported_by_glob_use(_: DefId)
922 -> Lrc<FxHashSet<ast::Name>> {
926 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
928 desc { "calculating the stability index for the local crate" }
930 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
932 desc { "fetching all foreign CrateNum instances" }
935 /// A vector of every trait accessible in the whole crate
936 /// (i.e., including those from subcrates). This is used only for
938 query all_traits(_: CrateNum) -> &'tcx [DefId] {
939 desc { "fetching all foreign and local traits" }
944 query exported_symbols(_: CrateNum)
945 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
946 desc { "exported_symbols" }
951 query collect_and_partition_mono_items(_: CrateNum)
952 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
954 desc { "collect_and_partition_mono_items" }
956 query is_codegened_item(_: DefId) -> bool {}
957 query codegen_unit(_: Symbol) -> Arc<CodegenUnit<'tcx>> {
959 desc { "codegen_unit" }
961 query backend_optimization_level(_: CrateNum) -> OptLevel {
962 desc { "optimization level used by backend" }
967 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
969 desc { "output_filenames" }
974 /// Do not call this query directly: invoke `normalize` instead.
975 query normalize_projection_ty(
976 goal: CanonicalProjectionGoal<'tcx>
978 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
982 desc { "normalizing `{:?}`", goal }
985 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
986 query normalize_ty_after_erasing_regions(
987 goal: ParamEnvAnd<'tcx, Ty<'tcx>>
990 desc { "normalizing `{:?}`", goal }
993 query implied_outlives_bounds(
994 goal: CanonicalTyGoal<'tcx>
996 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1000 desc { "computing implied outlives bounds for `{:?}`", goal }
1003 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1004 query dropck_outlives(
1005 goal: CanonicalTyGoal<'tcx>
1007 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1011 desc { "computing dropck types for `{:?}`", goal }
1014 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1015 /// `infcx.predicate_must_hold()` instead.
1016 query evaluate_obligation(
1017 goal: CanonicalPredicateGoal<'tcx>
1018 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1020 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1023 query evaluate_goal(
1024 goal: traits::ChalkCanonicalGoal<'tcx>
1026 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1030 desc { "evaluating trait selection obligation `{}`", goal.value.goal }
1033 /// Do not call this query directly: part of the `Eq` type-op
1034 query type_op_ascribe_user_type(
1035 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1037 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1041 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1044 /// Do not call this query directly: part of the `Eq` type-op
1046 goal: CanonicalTypeOpEqGoal<'tcx>
1048 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1052 desc { "evaluating `type_op_eq` `{:?}`", goal }
1055 /// Do not call this query directly: part of the `Subtype` type-op
1056 query type_op_subtype(
1057 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1059 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1063 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1066 /// Do not call this query directly: part of the `ProvePredicate` type-op
1067 query type_op_prove_predicate(
1068 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1070 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1074 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1077 /// Do not call this query directly: part of the `Normalize` type-op
1078 query type_op_normalize_ty(
1079 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1081 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1085 desc { "normalizing `{:?}`", goal }
1088 /// Do not call this query directly: part of the `Normalize` type-op
1089 query type_op_normalize_predicate(
1090 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1092 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1096 desc { "normalizing `{:?}`", goal }
1099 /// Do not call this query directly: part of the `Normalize` type-op
1100 query type_op_normalize_poly_fn_sig(
1101 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1103 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1107 desc { "normalizing `{:?}`", goal }
1110 /// Do not call this query directly: part of the `Normalize` type-op
1111 query type_op_normalize_fn_sig(
1112 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1114 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1118 desc { "normalizing `{:?}`", goal }
1121 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1124 "testing substituted normalized predicates:`{}`",
1125 tcx.def_path_str(key.0)
1129 query method_autoderef_steps(
1130 goal: CanonicalTyGoal<'tcx>
1131 ) -> MethodAutoderefStepsResult<'tcx> {
1133 desc { "computing autoderef types for `{:?}`", goal }
1138 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1140 desc { "looking up the whitelist of target features" }
1143 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1144 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1147 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1150 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1152 desc { "looking up enabled feature gates" }