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 /// Records the type of every item.
34 query type_of(key: DefId) -> Ty<'tcx> {
35 cache_on_disk_if { key.is_local() }
38 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
39 /// associated generics.
40 query generics_of(key: DefId) -> &'tcx ty::Generics {
41 cache_on_disk_if { key.is_local() }
42 load_cached(tcx, id) {
43 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
44 .try_load_query_result(tcx, id);
45 generics.map(|x| &*tcx.arena.alloc(x))
49 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
50 /// predicates (where-clauses) that must be proven true in order
51 /// to reference it. This is almost always the "predicates query"
54 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
55 /// it is almost always the same as that query, except for the
56 /// case of traits. For traits, `predicates_of` contains
57 /// an additional `Self: Trait<...>` predicate that users don't
58 /// actually write. This reflects the fact that to invoke the
59 /// trait (e.g., via `Default::default`) you must supply types
60 /// that actually implement the trait. (However, this extra
61 /// predicate gets in the way of some checks, which are intended
62 /// to operate over only the actual where-clauses written by the
64 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
65 cache_on_disk_if { key.is_local() }
68 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
69 desc { "looking up the native libraries of a linked crate" }
72 query lint_levels(_: CrateNum) -> &'tcx lint::LintLevelMap {
74 desc { "computing the lint levels for items in this crate" }
79 query is_panic_runtime(_: CrateNum) -> bool {
81 desc { "checking if the crate is_panic_runtime" }
86 /// Set of all the `DefId`s in this crate that have MIR associated with
87 /// them. This includes all the body owners, but also things like struct
89 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
90 desc { "getting a list of all mir_keys" }
93 /// Maps DefId's that have an associated `mir::Body` to the result
94 /// of the MIR qualify_consts pass. The actual meaning of
95 /// the value isn't known except to the pass itself.
96 query mir_const_qualif(key: DefId) -> mir::QualifSet {
97 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
98 cache_on_disk_if { key.is_local() }
101 /// Fetch the MIR for a given `DefId` right after it's built - this includes
102 /// unreachable code.
103 query mir_built(_: DefId) -> &'tcx Steal<mir::Body<'tcx>> {}
105 /// Fetch the MIR for a given `DefId` up till the point where it is
106 /// ready for const evaluation.
108 /// See the README for the `mir` module for details.
109 query mir_const(_: DefId) -> &'tcx Steal<mir::Body<'tcx>> {
113 query mir_validated(_: DefId) ->
115 &'tcx Steal<mir::Body<'tcx>>,
116 &'tcx Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
121 /// MIR after our optimization passes have run. This is MIR that is ready
122 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
123 query optimized_mir(key: DefId) -> &'tcx mir::Body<'tcx> {
124 cache_on_disk_if { key.is_local() }
125 load_cached(tcx, id) {
126 let mir: Option<crate::mir::Body<'tcx>> = tcx.queries.on_disk_cache
127 .try_load_query_result(tcx, id);
128 mir.map(|x| &*tcx.arena.alloc(x))
132 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
133 cache_on_disk_if { key.is_local() }
134 load_cached(tcx, id) {
135 let promoted: Option<
136 rustc_index::vec::IndexVec<
137 crate::mir::Promoted,
138 crate::mir::Body<'tcx>
139 >> = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
140 promoted.map(|p| &*tcx.arena.alloc(p))
146 // Erases regions from `ty` to yield a new type.
147 // Normally you would just use `tcx.erase_regions(&value)`,
148 // however, which uses this query as a kind of cache.
149 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
150 // This query is not expected to have input -- as a result, it
151 // is not a good candidates for "replay" because it is essentially a
152 // pure function of its input (and hence the expectation is that
153 // no caller would be green **apart** from just these
154 // queries). Making it anonymous avoids hashing the result, which
155 // may save a bit of time.
158 desc { "erasing regions from `{:?}`", ty }
161 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
162 desc { "generating chalk-style clauses" }
165 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
167 desc { "generating chalk-style clauses for environment" }
170 // Get the chalk-style environment of the given item.
171 query environment(_: DefId) -> traits::Environment<'tcx> {
172 desc { "return a chalk-style environment" }
177 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
178 desc { "wasm import module map" }
183 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
184 /// predicates (where-clauses) directly defined on it. This is
185 /// equal to the `explicit_predicates_of` predicates plus the
186 /// `inferred_outlives_of` predicates.
187 query predicates_defined_on(_: DefId) -> ty::GenericPredicates<'tcx> {}
189 /// Returns the predicates written explicitly by the user.
190 query explicit_predicates_of(_: DefId) -> ty::GenericPredicates<'tcx> {}
192 /// Returns the inferred outlives predicates (e.g., for `struct
193 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
194 query inferred_outlives_of(_: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {}
196 /// Maps from the `DefId` of a trait to the list of
197 /// super-predicates. This is a subset of the full list of
198 /// predicates. We store these in a separate map because we must
199 /// evaluate them even during type conversion, often before the
200 /// full predicates are available (note that supertraits have
201 /// additional acyclicity requirements).
202 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
203 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
206 /// To avoid cycles within the predicates of a single item we compute
207 /// per-type-parameter predicates for resolving `T::AssocTy`.
208 query type_param_predicates(key: (DefId, DefId)) -> ty::GenericPredicates<'tcx> {
210 desc { |tcx| "computing the bounds for type parameter `{}`", {
211 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
212 tcx.hir().ty_param_name(id)
216 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
217 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
218 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
220 // The cycle error here should be reported as an error by `check_representable`.
221 // We consider the type as Sized in the meanwhile to avoid
222 // further errors (done in impl Value for AdtSizedConstraint).
223 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
224 // in case we accidentally otherwise don't emit an error.
225 query adt_sized_constraint(
227 ) -> AdtSizedConstraint<'tcx> {
231 query adt_dtorck_constraint(
233 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
235 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
236 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
237 /// not have the feature gate active).
239 /// **Do not call this function manually.** It is only meant to cache the base data for the
240 /// `is_const_fn` function.
241 query is_const_fn_raw(key: DefId) -> bool {
242 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
245 query asyncness(key: DefId) -> hir::IsAsync {
246 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
249 /// Returns `true` if calls to the function may be promoted.
251 /// This is either because the function is e.g., a tuple-struct or tuple-variant
252 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
253 /// be removed in the future in favour of some form of check which figures out whether the
254 /// function does not inspect the bits of any of its arguments (so is essentially just a
255 /// constructor function).
256 query is_promotable_const_fn(_: DefId) -> bool {}
258 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
260 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
261 query is_foreign_item(_: DefId) -> bool {}
263 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
264 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
266 /// Gets a map with the variance of every item; use `item_variance` instead.
267 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
268 desc { "computing the variances for items in this crate" }
271 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
272 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
276 /// Maps from thee `DefId` of a type to its (inferred) outlives.
277 query inferred_outlives_crate(_: CrateNum)
278 -> &'tcx ty::CratePredicatesMap<'tcx> {
279 desc { "computing the inferred outlives predicates for items in this crate" }
284 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
285 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
287 /// Maps from a trait item to the trait item "descriptor".
288 query associated_item(_: DefId) -> ty::AssocItem {}
290 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
291 query impl_polarity(_: DefId) -> ty::ImplPolarity {}
293 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
297 /// Maps a `DefId` of a type to a list of its inherent impls.
298 /// Contains implementations of methods that are inherent to a type.
299 /// Methods in these implementations don't need to be exported.
300 query inherent_impls(_: DefId) -> &'tcx [DefId] {
306 /// The result of unsafety-checking this `DefId`.
307 query unsafety_check_result(key: DefId) -> mir::UnsafetyCheckResult {
308 cache_on_disk_if { key.is_local() }
311 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
312 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
314 /// The signature of functions and closures.
315 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
319 query lint_mod(key: DefId) -> () {
320 desc { |tcx| "linting {}", key.describe_as_module(tcx) }
323 /// Checks the attributes in the module.
324 query check_mod_attrs(key: DefId) -> () {
325 desc { |tcx| "checking attributes in {}", key.describe_as_module(tcx) }
328 query check_mod_unstable_api_usage(key: DefId) -> () {
329 desc { |tcx| "checking for unstable API usage in {}", key.describe_as_module(tcx) }
332 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
333 query check_mod_const_bodies(key: DefId) -> () {
334 desc { |tcx| "checking consts in {}", key.describe_as_module(tcx) }
337 /// Checks the loops in the module.
338 query check_mod_loops(key: DefId) -> () {
339 desc { |tcx| "checking loops in {}", key.describe_as_module(tcx) }
342 query check_mod_item_types(key: DefId) -> () {
343 desc { |tcx| "checking item types in {}", key.describe_as_module(tcx) }
346 query check_mod_privacy(key: DefId) -> () {
347 desc { |tcx| "checking privacy in {}", key.describe_as_module(tcx) }
350 query check_mod_intrinsics(key: DefId) -> () {
351 desc { |tcx| "checking intrinsics in {}", key.describe_as_module(tcx) }
354 query check_mod_liveness(key: DefId) -> () {
355 desc { |tcx| "checking liveness of variables in {}", key.describe_as_module(tcx) }
358 query check_mod_impl_wf(key: DefId) -> () {
359 desc { |tcx| "checking that impls are well-formed in {}", key.describe_as_module(tcx) }
362 query collect_mod_item_types(key: DefId) -> () {
363 desc { |tcx| "collecting item types in {}", key.describe_as_module(tcx) }
366 /// Caches `CoerceUnsized` kinds for impls on custom types.
367 query coerce_unsized_info(_: DefId)
368 -> ty::adjustment::CoerceUnsizedInfo {}
372 query typeck_item_bodies(_: CrateNum) -> () {
373 desc { "type-checking all item bodies" }
376 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
377 cache_on_disk_if { key.is_local() }
378 load_cached(tcx, id) {
379 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
380 .queries.on_disk_cache
381 .try_load_query_result(tcx, id);
383 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
389 query used_trait_imports(key: DefId) -> &'tcx DefIdSet {
390 cache_on_disk_if { key.is_local() }
395 query has_typeck_tables(_: DefId) -> bool {}
397 query coherent_trait(def_id: DefId) -> () {
398 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
403 /// Borrow-checks the function body. If this is a closure, returns
404 /// additional requirements that the closure's creator must verify.
405 query mir_borrowck(key: DefId) -> mir::BorrowCheckResult<'tcx> {
406 cache_on_disk_if(tcx, _) { key.is_local() && tcx.is_closure(key) }
411 /// Gets a complete map from all types to their inherent impls.
412 /// Not meant to be used directly outside of coherence.
413 /// (Defined only for `LOCAL_CRATE`.)
414 query crate_inherent_impls(k: CrateNum)
415 -> &'tcx CrateInherentImpls {
417 desc { "all inherent impls defined in crate `{:?}`", k }
420 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
421 /// Not meant to be used directly outside of coherence.
422 /// (Defined only for `LOCAL_CRATE`.)
423 query crate_inherent_impls_overlap_check(_: CrateNum)
426 desc { "check for overlap between inherent impls defined in this crate" }
431 /// Evaluates a constant without running sanity checks.
433 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
434 /// during validation. Please add a comment to every use site explaining why using
435 /// `const_eval` isn't sufficient.
436 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
437 -> ConstEvalRawResult<'tcx> {
440 "const-evaluating `{}`",
441 tcx.def_path_str(key.value.instance.def.def_id())
445 /// Results of evaluating const items or constants embedded in
446 /// other items (such as enum variant explicit discriminants).
447 query const_eval(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
448 -> ConstEvalResult<'tcx> {
451 "const-evaluating + checking `{}`",
452 tcx.def_path_str(key.value.instance.def.def_id())
454 cache_on_disk_if(_, opt_result) {
455 // Only store results without errors
456 opt_result.map_or(true, |r| r.is_ok())
460 /// Extracts a field of a (variant of a) const.
462 key: ty::ParamEnvAnd<'tcx, (&'tcx ty::Const<'tcx>, mir::Field)>
463 ) -> &'tcx ty::Const<'tcx> {
465 desc { "extract field of const" }
468 query const_caller_location(key: (syntax_pos::Symbol, u32, u32)) -> &'tcx ty::Const<'tcx> {
470 desc { "get a &core::panic::Location referring to a span" }
475 query check_match(key: DefId) {
476 cache_on_disk_if { key.is_local() }
479 /// Performs part of the privacy check and computes "access levels".
480 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
482 desc { "privacy access levels" }
484 query check_private_in_public(_: CrateNum) -> () {
486 desc { "checking for private elements in public interfaces" }
491 query reachable_set(_: CrateNum) -> ReachableSet {
492 desc { "reachability" }
495 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
496 /// in the case of closures, this will be redirected to the enclosing function.
497 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
499 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::Body<'tcx> {
501 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
504 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
506 desc { "computing the symbol for `{}`", key }
507 cache_on_disk_if { true }
510 query def_kind(_: DefId) -> Option<DefKind> {}
511 query def_span(_: DefId) -> Span {
512 // FIXME(mw): DefSpans are not really inputs since they are derived from
513 // HIR. But at the moment HIR hashing still contains some hacks that allow
514 // to make type debuginfo to be source location independent. Declaring
515 // DefSpan an input makes sure that changes to these are always detected
516 // regardless of HIR hashing.
519 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
520 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
521 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
525 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {
526 cache_on_disk_if { true }
531 query fn_arg_names(_: DefId) -> Vec<ast::Name> {}
532 /// Gets the rendered value of the specified constant or associated constant.
534 query rendered_const(_: DefId) -> String {}
535 query impl_parent(_: DefId) -> Option<DefId> {}
539 query trait_of_item(_: DefId) -> Option<DefId> {}
543 query is_mir_available(key: DefId) -> bool {
544 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
549 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
550 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
552 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
557 query codegen_fulfill_obligation(
558 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
559 ) -> Vtable<'tcx, ()> {
561 cache_on_disk_if { true }
563 "checking if `{}` fulfills its obligations",
564 tcx.def_path_str(key.1.def_id())
570 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
571 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
573 query specialization_graph_of(_: DefId) -> &'tcx specialization_graph::Graph {
574 cache_on_disk_if { true }
576 query is_object_safe(key: DefId) -> bool {
577 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
580 /// Gets the ParameterEnvironment for a given item; this environment
581 /// will be in "user-facing" mode, meaning that it is suitabe for
582 /// type-checking etc, and it does not normalize specializable
583 /// associated types. This is almost always what you want,
584 /// unless you are doing MIR optimizations, in which case you
585 /// might want to use `reveal_all()` method to change modes.
586 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
588 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
589 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
590 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
592 desc { "computing whether `{}` is `Copy`", env.value }
594 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
596 desc { "computing whether `{}` is `Sized`", env.value }
598 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
600 desc { "computing whether `{}` is freeze", env.value }
603 // The cycle error here should be reported as an error by `check_representable`.
604 // We consider the type as not needing drop in the meanwhile to avoid
605 // further errors (done in impl Value for NeedsDrop).
606 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
607 // in case we accidentally otherwise don't emit an error.
608 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> NeedsDrop {
611 desc { "computing whether `{}` needs drop", env.value }
615 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
616 ) -> Result<&'tcx ty::layout::LayoutDetails, ty::layout::LayoutError<'tcx>> {
618 desc { "computing layout of `{}`", env.value }
623 query dylib_dependency_formats(_: CrateNum)
624 -> &'tcx [(CrateNum, LinkagePreference)] {
625 desc { "dylib dependency formats of crate" }
628 query dependency_formats(_: CrateNum)
629 -> Lrc<crate::middle::dependency_format::Dependencies>
631 desc { "get the linkage format of all dependencies" }
636 query is_compiler_builtins(_: CrateNum) -> bool {
638 desc { "checking if the crate is_compiler_builtins" }
640 query has_global_allocator(_: CrateNum) -> bool {
642 desc { "checking if the crate has_global_allocator" }
644 query has_panic_handler(_: CrateNum) -> bool {
646 desc { "checking if the crate has_panic_handler" }
648 query is_sanitizer_runtime(_: CrateNum) -> bool {
650 desc { "query a crate is `#![sanitizer_runtime]`" }
652 query is_profiler_runtime(_: CrateNum) -> bool {
654 desc { "query a crate is `#![profiler_runtime]`" }
656 query panic_strategy(_: CrateNum) -> PanicStrategy {
658 desc { "query a crate's configured panic strategy" }
660 query is_no_builtins(_: CrateNum) -> bool {
662 desc { "test whether a crate has `#![no_builtins]`" }
664 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
666 desc { "query a crate's symbol mangling version" }
669 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
671 desc { "getting crate's ExternCrateData" }
676 query specializes(_: (DefId, DefId)) -> bool {
678 desc { "computing whether impls specialize one another" }
680 query in_scope_traits_map(_: DefIndex)
681 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
683 desc { "traits in scope at a block" }
688 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
694 query impl_defaultness(_: DefId) -> hir::Defaultness {}
696 query check_item_well_formed(_: DefId) -> () {}
697 query check_trait_item_well_formed(_: DefId) -> () {}
698 query check_impl_item_well_formed(_: DefId) -> () {}
702 // The `DefId`s of all non-generic functions and statics in the given crate
703 // that can be reached from outside the crate.
705 // We expect this items to be available for being linked to.
707 // This query can also be called for `LOCAL_CRATE`. In this case it will
708 // compute which items will be reachable to other crates, taking into account
709 // the kind of crate that is currently compiled. Crates with only a
710 // C interface have fewer reachable things.
712 // Does not include external symbols that don't have a corresponding DefId,
713 // like the compiler-generated `main` function and so on.
714 query reachable_non_generics(_: CrateNum)
715 -> &'tcx DefIdMap<SymbolExportLevel> {
716 desc { "looking up the exported symbols of a crate" }
718 query is_reachable_non_generic(_: DefId) -> bool {}
719 query is_unreachable_local_definition(_: DefId) -> bool {}
723 query upstream_monomorphizations(
725 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
726 desc { "collecting available upstream monomorphizations `{:?}`", k }
728 query upstream_monomorphizations_for(_: DefId)
729 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
733 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
734 desc { "looking up the foreign modules of a linked crate" }
737 /// Identifies the entry-point (e.g., the `main` function) for a given
738 /// crate, returning `None` if there is no entry point (such as for library crates).
739 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
740 desc { "looking up the entry function of a crate" }
742 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
743 desc { "looking up the plugin registrar for a crate" }
745 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
746 desc { "looking up the derive registrar for a crate" }
748 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
750 desc { "looking up the disambiguator a crate" }
752 query crate_hash(_: CrateNum) -> Svh {
754 desc { "looking up the hash a crate" }
756 query crate_host_hash(_: CrateNum) -> Option<Svh> {
758 desc { "looking up the hash of a host version of a crate" }
760 query original_crate_name(_: CrateNum) -> Symbol {
762 desc { "looking up the original name a crate" }
764 query extra_filename(_: CrateNum) -> String {
766 desc { "looking up the extra filename for a crate" }
771 query implementations_of_trait(_: (CrateNum, DefId))
774 desc { "looking up implementations of a trait in a crate" }
776 query all_trait_implementations(_: CrateNum)
778 desc { "looking up all (?) trait implementations" }
783 query dllimport_foreign_items(_: CrateNum)
784 -> &'tcx FxHashSet<DefId> {
785 desc { "dllimport_foreign_items" }
787 query is_dllimport_foreign_item(_: DefId) -> bool {}
788 query is_statically_included_foreign_item(_: DefId) -> bool {}
789 query native_library_kind(_: DefId)
790 -> Option<NativeLibraryKind> {}
794 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
796 desc { "looking up link arguments for a crate" }
801 /// Lifetime resolution. See `middle::resolve_lifetimes`.
802 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
803 desc { "resolving lifetimes" }
805 query named_region_map(_: DefIndex) ->
806 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
807 desc { "looking up a named region" }
809 query is_late_bound_map(_: DefIndex) ->
810 Option<&'tcx FxHashSet<ItemLocalId>> {
811 desc { "testing if a region is late bound" }
813 query object_lifetime_defaults_map(_: DefIndex)
814 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
815 desc { "looking up lifetime defaults for a region" }
820 query visibility(_: DefId) -> ty::Visibility {}
824 query dep_kind(_: CrateNum) -> DepKind {
826 desc { "fetching what a dependency looks like" }
828 query crate_name(_: CrateNum) -> Symbol {
830 desc { "fetching what a crate is named" }
832 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
833 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
835 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
837 desc { "calculating the lib features map" }
839 query defined_lib_features(_: CrateNum)
840 -> &'tcx [(Symbol, Option<Symbol>)] {
841 desc { "calculating the lib features defined in a crate" }
843 /// Returns the lang items defined in another crate by loading it from metadata.
844 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
846 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
848 desc { "calculating the lang items map" }
851 /// Returns all diagnostic items defined in all crates.
852 query all_diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
854 desc { "calculating the diagnostic items map" }
857 /// Returns the lang items defined in another crate by loading it from metadata.
858 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
859 desc { "calculating the lang items defined in a crate" }
862 /// Returns the diagnostic items defined in a crate.
863 query diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
864 desc { "calculating the diagnostic items map in a crate" }
867 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
868 desc { "calculating the missing lang items in a crate" }
870 query visible_parent_map(_: CrateNum)
871 -> &'tcx DefIdMap<DefId> {
872 desc { "calculating the visible parent map" }
874 query missing_extern_crate_item(_: CrateNum) -> bool {
876 desc { "seeing if we're missing an `extern crate` item for this crate" }
878 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
880 desc { "looking at the source for a crate" }
882 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
884 desc { "generating a postorder list of CrateNums" }
887 query upvars(_: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
890 query maybe_unused_trait_import(_: DefId) -> bool {
893 query maybe_unused_extern_crates(_: CrateNum)
894 -> &'tcx [(DefId, Span)] {
896 desc { "looking up all possibly unused extern crates" }
898 query names_imported_by_glob_use(_: DefId)
899 -> Lrc<FxHashSet<ast::Name>> {
903 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
905 desc { "calculating the stability index for the local crate" }
907 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
909 desc { "fetching all foreign CrateNum instances" }
912 /// A vector of every trait accessible in the whole crate
913 /// (i.e., including those from subcrates). This is used only for
915 query all_traits(_: CrateNum) -> &'tcx [DefId] {
916 desc { "fetching all foreign and local traits" }
921 query exported_symbols(_: CrateNum)
922 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
923 desc { "exported_symbols" }
928 query collect_and_partition_mono_items(_: CrateNum)
929 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
931 desc { "collect_and_partition_mono_items" }
933 query is_codegened_item(_: DefId) -> bool {}
934 query codegen_unit(_: Symbol) -> Arc<CodegenUnit<'tcx>> {
936 desc { "codegen_unit" }
938 query backend_optimization_level(_: CrateNum) -> OptLevel {
939 desc { "optimization level used by backend" }
944 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
946 desc { "output_filenames" }
951 /// Do not call this query directly: invoke `normalize` instead.
952 query normalize_projection_ty(
953 goal: CanonicalProjectionGoal<'tcx>
955 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
959 desc { "normalizing `{:?}`", goal }
962 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
963 query normalize_ty_after_erasing_regions(
964 goal: ParamEnvAnd<'tcx, Ty<'tcx>>
967 desc { "normalizing `{:?}`", goal }
970 query implied_outlives_bounds(
971 goal: CanonicalTyGoal<'tcx>
973 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
977 desc { "computing implied outlives bounds for `{:?}`", goal }
980 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
981 query dropck_outlives(
982 goal: CanonicalTyGoal<'tcx>
984 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
988 desc { "computing dropck types for `{:?}`", goal }
991 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
992 /// `infcx.predicate_must_hold()` instead.
993 query evaluate_obligation(
994 goal: CanonicalPredicateGoal<'tcx>
995 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
997 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1000 query evaluate_goal(
1001 goal: traits::ChalkCanonicalGoal<'tcx>
1003 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1007 desc { "evaluating trait selection obligation `{}`", goal.value.goal }
1010 /// Do not call this query directly: part of the `Eq` type-op
1011 query type_op_ascribe_user_type(
1012 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1014 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1018 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1021 /// Do not call this query directly: part of the `Eq` type-op
1023 goal: CanonicalTypeOpEqGoal<'tcx>
1025 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1029 desc { "evaluating `type_op_eq` `{:?}`", goal }
1032 /// Do not call this query directly: part of the `Subtype` type-op
1033 query type_op_subtype(
1034 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1036 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1040 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1043 /// Do not call this query directly: part of the `ProvePredicate` type-op
1044 query type_op_prove_predicate(
1045 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1047 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1051 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1054 /// Do not call this query directly: part of the `Normalize` type-op
1055 query type_op_normalize_ty(
1056 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1058 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1062 desc { "normalizing `{:?}`", goal }
1065 /// Do not call this query directly: part of the `Normalize` type-op
1066 query type_op_normalize_predicate(
1067 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1069 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1073 desc { "normalizing `{:?}`", goal }
1076 /// Do not call this query directly: part of the `Normalize` type-op
1077 query type_op_normalize_poly_fn_sig(
1078 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1080 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1084 desc { "normalizing `{:?}`", goal }
1087 /// Do not call this query directly: part of the `Normalize` type-op
1088 query type_op_normalize_fn_sig(
1089 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1091 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1095 desc { "normalizing `{:?}`", goal }
1098 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1101 "testing substituted normalized predicates:`{}`",
1102 tcx.def_path_str(key.0)
1106 query method_autoderef_steps(
1107 goal: CanonicalTyGoal<'tcx>
1108 ) -> MethodAutoderefStepsResult<'tcx> {
1110 desc { "computing autoderef types for `{:?}`", goal }
1115 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1117 desc { "looking up the whitelist of target features" }
1120 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1121 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1124 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1127 query features_query(_: CrateNum) -> &'tcx feature_gate::Features {
1129 desc { "looking up enabled feature gates" }