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::InternedString;
21 // Each of these queries corresponds to a function pointer field in the
22 // `Providers` struct for requesting a value of that type, and a method
23 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
24 // which memoizes and does dep-graph tracking, wrapping around the actual
25 // `Providers` that the driver creates (using several `rustc_*` crates).
27 // The result type of each query must implement `Clone`, and additionally
28 // `ty::query::values::Value`, which produces an appropriate placeholder
29 // (error) value if the query resulted in a query cycle.
30 // Queries marked with `fatal_cycle` do not need the latter implementation,
31 // as they will raise an fatal error on query cycles instead.
34 /// Records the type of every item.
35 query type_of(key: DefId) -> Ty<'tcx> {
36 cache_on_disk_if { key.is_local() }
39 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
40 /// associated generics.
41 query generics_of(key: DefId) -> &'tcx ty::Generics {
42 cache_on_disk_if { key.is_local() }
43 load_cached(tcx, id) {
44 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
45 .try_load_query_result(tcx, id);
46 generics.map(|x| &*tcx.arena.alloc(x))
50 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
51 /// predicates (where-clauses) that must be proven true in order
52 /// to reference it. This is almost always the "predicates query"
55 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
56 /// it is almost always the same as that query, except for the
57 /// case of traits. For traits, `predicates_of` contains
58 /// an additional `Self: Trait<...>` predicate that users don't
59 /// actually write. This reflects the fact that to invoke the
60 /// trait (e.g., via `Default::default`) you must supply types
61 /// that actually implement the trait. (However, this extra
62 /// predicate gets in the way of some checks, which are intended
63 /// to operate over only the actual where-clauses written by the
65 query predicates_of(key: DefId) -> &'tcx ty::GenericPredicates<'tcx> {
66 cache_on_disk_if { key.is_local() }
69 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
70 desc { "looking up the native libraries of a linked crate" }
73 query lint_levels(_: CrateNum) -> &'tcx lint::LintLevelMap {
75 desc { "computing the lint levels for items in this crate" }
80 query is_panic_runtime(_: CrateNum) -> bool {
82 desc { "checking if the crate is_panic_runtime" }
87 /// Set of all the `DefId`s in this crate that have MIR associated with
88 /// them. This includes all the body owners, but also things like struct
90 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
91 desc { "getting a list of all mir_keys" }
94 /// Maps DefId's that have an associated `mir::Body` to the result
95 /// of the MIR qualify_consts pass. The actual meaning of
96 /// the value isn't known except to the pass itself.
97 query mir_const_qualif(key: DefId) -> (u8, &'tcx BitSet<mir::Local>) {
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) -> &'tcx Steal<mir::Body<'tcx>> {
117 /// MIR after our optimization passes have run. This is MIR that is ready
118 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
119 query optimized_mir(key: DefId) -> &'tcx mir::Body<'tcx> {
120 cache_on_disk_if { key.is_local() }
121 load_cached(tcx, id) {
122 let mir: Option<crate::mir::Body<'tcx>> = tcx.queries.on_disk_cache
123 .try_load_query_result(tcx, id);
124 mir.map(|x| &*tcx.arena.alloc(x))
130 // Erases regions from `ty` to yield a new type.
131 // Normally you would just use `tcx.erase_regions(&value)`,
132 // however, which uses this query as a kind of cache.
133 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
134 // This query is not expected to have input -- as a result, it
135 // is not a good candidates for "replay" because it is essentially a
136 // pure function of its input (and hence the expectation is that
137 // no caller would be green **apart** from just these
138 // queries). Making it anonymous avoids hashing the result, which
139 // may save a bit of time.
142 desc { "erasing regions from `{:?}`", ty }
145 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
146 desc { "generating chalk-style clauses" }
149 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
151 desc { "generating chalk-style clauses for environment" }
154 // Get the chalk-style environment of the given item.
155 query environment(_: DefId) -> traits::Environment<'tcx> {
156 desc { "return a chalk-style environment" }
161 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
162 desc { "wasm import module map" }
167 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
168 /// predicates (where-clauses) directly defined on it. This is
169 /// equal to the `explicit_predicates_of` predicates plus the
170 /// `inferred_outlives_of` predicates.
171 query predicates_defined_on(_: DefId)
172 -> &'tcx ty::GenericPredicates<'tcx> {}
174 /// Returns the predicates written explicitly by the user.
175 query explicit_predicates_of(_: DefId)
176 -> &'tcx ty::GenericPredicates<'tcx> {}
178 /// Returns the inferred outlives predicates (e.g., for `struct
179 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
180 query inferred_outlives_of(_: DefId) -> &'tcx [ty::Predicate<'tcx>] {}
182 /// Maps from the `DefId` of a trait to the list of
183 /// super-predicates. This is a subset of the full list of
184 /// predicates. We store these in a separate map because we must
185 /// evaluate them even during type conversion, often before the
186 /// full predicates are available (note that supertraits have
187 /// additional acyclicity requirements).
188 query super_predicates_of(key: DefId) -> &'tcx ty::GenericPredicates<'tcx> {
189 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
192 /// To avoid cycles within the predicates of a single item we compute
193 /// per-type-parameter predicates for resolving `T::AssocTy`.
194 query type_param_predicates(key: (DefId, DefId))
195 -> &'tcx ty::GenericPredicates<'tcx> {
197 desc { |tcx| "computing the bounds for type parameter `{}`", {
198 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
199 tcx.hir().ty_param_name(id)
203 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
204 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
205 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
207 // The cycle error here should be reported as an error by `check_representable`.
208 // We consider the type as Sized in the meanwhile to avoid
209 // further errors (done in impl Value for AdtSizedConstraint).
210 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
211 // in case we accidentally otherwise don't emit an error.
212 query adt_sized_constraint(
214 ) -> AdtSizedConstraint<'tcx> {
218 query adt_dtorck_constraint(
220 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
222 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
223 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
224 /// not have the feature gate active).
226 /// **Do not call this function manually.** It is only meant to cache the base data for the
227 /// `is_const_fn` function.
228 query is_const_fn_raw(key: DefId) -> bool {
229 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
232 /// Returns `true` if calls to the function may be promoted.
234 /// This is either because the function is e.g., a tuple-struct or tuple-variant
235 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
236 /// be removed in the future in favour of some form of check which figures out whether the
237 /// function does not inspect the bits of any of its arguments (so is essentially just a
238 /// constructor function).
239 query is_promotable_const_fn(_: DefId) -> bool {}
241 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
243 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
244 query is_foreign_item(_: DefId) -> bool {}
246 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
247 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
249 /// Gets a map with the variance of every item; use `item_variance` instead.
250 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
251 desc { "computing the variances for items in this crate" }
254 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
255 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
259 /// Maps from thee `DefId` of a type to its (inferred) outlives.
260 query inferred_outlives_crate(_: CrateNum)
261 -> &'tcx ty::CratePredicatesMap<'tcx> {
262 desc { "computing the inferred outlives predicates for items in this crate" }
267 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
268 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
270 /// Maps from a trait item to the trait item "descriptor".
271 query associated_item(_: DefId) -> ty::AssocItem {}
273 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
274 query impl_polarity(_: DefId) -> hir::ImplPolarity {}
276 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
280 /// Maps a `DefId` of a type to a list of its inherent impls.
281 /// Contains implementations of methods that are inherent to a type.
282 /// Methods in these implementations don't need to be exported.
283 query inherent_impls(_: DefId) -> &'tcx [DefId] {
289 /// The result of unsafety-checking this `DefId`.
290 query unsafety_check_result(key: DefId) -> mir::UnsafetyCheckResult {
291 cache_on_disk_if { key.is_local() }
294 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
295 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
297 /// The signature of functions and closures.
298 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
302 query lint_mod(key: DefId) -> () {
303 desc { |tcx| "linting {}", key.describe_as_module(tcx) }
306 /// Checks the attributes in the module.
307 query check_mod_attrs(key: DefId) -> () {
308 desc { |tcx| "checking attributes in {}", key.describe_as_module(tcx) }
311 query check_mod_unstable_api_usage(key: DefId) -> () {
312 desc { |tcx| "checking for unstable API usage in {}", key.describe_as_module(tcx) }
315 /// Checks the loops in the module.
316 query check_mod_loops(key: DefId) -> () {
317 desc { |tcx| "checking loops in {}", key.describe_as_module(tcx) }
320 query check_mod_item_types(key: DefId) -> () {
321 desc { |tcx| "checking item types in {}", key.describe_as_module(tcx) }
324 query check_mod_privacy(key: DefId) -> () {
325 desc { |tcx| "checking privacy in {}", key.describe_as_module(tcx) }
328 query check_mod_intrinsics(key: DefId) -> () {
329 desc { |tcx| "checking intrinsics in {}", key.describe_as_module(tcx) }
332 query check_mod_liveness(key: DefId) -> () {
333 desc { |tcx| "checking liveness of variables in {}", key.describe_as_module(tcx) }
336 query check_mod_impl_wf(key: DefId) -> () {
337 desc { |tcx| "checking that impls are well-formed in {}", key.describe_as_module(tcx) }
340 query collect_mod_item_types(key: DefId) -> () {
341 desc { |tcx| "collecting item types in {}", key.describe_as_module(tcx) }
344 /// Caches `CoerceUnsized` kinds for impls on custom types.
345 query coerce_unsized_info(_: DefId)
346 -> ty::adjustment::CoerceUnsizedInfo {}
350 query typeck_item_bodies(_: CrateNum) -> () {
351 desc { "type-checking all item bodies" }
354 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
355 cache_on_disk_if { key.is_local() }
356 load_cached(tcx, id) {
357 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
358 .queries.on_disk_cache
359 .try_load_query_result(tcx, id);
361 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
367 query used_trait_imports(key: DefId) -> &'tcx DefIdSet {
368 cache_on_disk_if { key.is_local() }
373 query has_typeck_tables(_: DefId) -> bool {}
375 query coherent_trait(def_id: DefId) -> () {
376 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
381 query borrowck(key: DefId) -> &'tcx BorrowCheckResult {
382 cache_on_disk_if { key.is_local() }
385 /// Borrow-checks the function body. If this is a closure, returns
386 /// additional requirements that the closure's creator must verify.
387 query mir_borrowck(key: DefId) -> mir::BorrowCheckResult<'tcx> {
388 cache_on_disk_if(tcx, _) { key.is_local() && tcx.is_closure(key) }
393 /// Gets a complete map from all types to their inherent impls.
394 /// Not meant to be used directly outside of coherence.
395 /// (Defined only for `LOCAL_CRATE`.)
396 query crate_inherent_impls(k: CrateNum)
397 -> &'tcx CrateInherentImpls {
399 desc { "all inherent impls defined in crate `{:?}`", k }
402 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
403 /// Not meant to be used directly outside of coherence.
404 /// (Defined only for `LOCAL_CRATE`.)
405 query crate_inherent_impls_overlap_check(_: CrateNum)
408 desc { "check for overlap between inherent impls defined in this crate" }
413 /// Evaluates a constant without running sanity checks.
415 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
416 /// during validation. Please add a comment to every use site explaining why using
417 /// `const_eval` isn't sufficient.
418 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
419 -> ConstEvalRawResult<'tcx> {
422 "const-evaluating `{}`",
423 tcx.def_path_str(key.value.instance.def.def_id())
425 cache_on_disk_if(_, opt_result) {
426 // Only store results without errors
427 // FIXME: We never store these
428 opt_result.map_or(true, |r| r.is_ok())
432 /// Results of evaluating const items or constants embedded in
433 /// other items (such as enum variant explicit discriminants).
434 query const_eval(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
435 -> ConstEvalResult<'tcx> {
438 "const-evaluating + checking `{}`",
439 tcx.def_path_str(key.value.instance.def.def_id())
441 cache_on_disk_if(_, opt_result) {
442 // Only store results without errors
443 opt_result.map_or(true, |r| r.is_ok())
447 /// Extracts a field of a (variant of a) const.
449 key: ty::ParamEnvAnd<'tcx, (&'tcx ty::Const<'tcx>, mir::Field)>
450 ) -> &'tcx ty::Const<'tcx> {
453 desc { "extract field of const" }
456 /// Produces an absolute path representation of the given type. See also the documentation
457 /// on `std::any::type_name`.
458 query type_name(key: Ty<'tcx>) -> &'tcx ty::Const<'tcx> {
461 desc { "get absolute path of type" }
467 query check_match(key: DefId) -> () {
468 cache_on_disk_if { key.is_local() }
471 /// Performs part of the privacy check and computes "access levels".
472 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
474 desc { "privacy access levels" }
476 query check_private_in_public(_: CrateNum) -> () {
478 desc { "checking for private elements in public interfaces" }
483 query reachable_set(_: CrateNum) -> ReachableSet {
484 desc { "reachability" }
487 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
488 /// in the case of closures, this will be redirected to the enclosing function.
489 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
491 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::Body<'tcx> {
493 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
496 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
498 desc { "computing the symbol for `{}`", key }
499 cache_on_disk_if { true }
502 query def_kind(_: DefId) -> Option<DefKind> {}
503 query def_span(_: DefId) -> Span {
504 // FIXME(mw): DefSpans are not really inputs since they are derived from
505 // HIR. But at the moment HIR hashing still contains some hacks that allow
506 // to make type debuginfo to be source location independent. Declaring
507 // DefSpan an input makes sure that changes to these are always detected
508 // regardless of HIR hashing.
511 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
512 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
513 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
517 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {
518 cache_on_disk_if { true }
523 query fn_arg_names(_: DefId) -> Vec<ast::Name> {}
524 /// Gets the rendered value of the specified constant or associated constant.
526 query rendered_const(_: DefId) -> String {}
527 query impl_parent(_: DefId) -> Option<DefId> {}
531 query trait_of_item(_: DefId) -> Option<DefId> {}
532 query const_is_rvalue_promotable_to_static(key: DefId) -> bool {
534 "const checking if rvalue is promotable to static `{}`",
535 tcx.def_path_str(key)
537 cache_on_disk_if { true }
539 query rvalue_promotable_map(key: DefId) -> &'tcx ItemLocalSet {
541 "checking which parts of `{}` are promotable to static",
542 tcx.def_path_str(key)
548 query is_mir_available(key: DefId) -> bool {
549 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
554 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
555 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
557 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
562 query codegen_fulfill_obligation(
563 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
564 ) -> Vtable<'tcx, ()> {
566 cache_on_disk_if { true }
568 "checking if `{}` fulfills its obligations",
569 tcx.def_path_str(key.1.def_id())
575 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
576 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
578 query specialization_graph_of(_: DefId) -> &'tcx specialization_graph::Graph {
579 cache_on_disk_if { true }
581 query is_object_safe(key: DefId) -> bool {
582 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
585 /// Gets the ParameterEnvironment for a given item; this environment
586 /// will be in "user-facing" mode, meaning that it is suitabe for
587 /// type-checking etc, and it does not normalize specializable
588 /// associated types. This is almost always what you want,
589 /// unless you are doing MIR optimizations, in which case you
590 /// might want to use `reveal_all()` method to change modes.
591 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
593 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
594 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
595 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
597 desc { "computing whether `{}` is `Copy`", env.value }
599 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
601 desc { "computing whether `{}` is `Sized`", env.value }
603 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
605 desc { "computing whether `{}` is freeze", env.value }
608 // The cycle error here should be reported as an error by `check_representable`.
609 // We consider the type as not needing drop in the meanwhile to avoid
610 // further errors (done in impl Value for NeedsDrop).
611 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
612 // in case we accidentally otherwise don't emit an error.
613 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> NeedsDrop {
616 desc { "computing whether `{}` needs drop", env.value }
620 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
621 ) -> Result<&'tcx ty::layout::LayoutDetails, ty::layout::LayoutError<'tcx>> {
623 desc { "computing layout of `{}`", env.value }
628 query dylib_dependency_formats(_: CrateNum)
629 -> &'tcx [(CrateNum, LinkagePreference)] {
630 desc { "dylib dependency formats of crate" }
635 query is_compiler_builtins(_: CrateNum) -> bool {
637 desc { "checking if the crate is_compiler_builtins" }
639 query has_global_allocator(_: CrateNum) -> bool {
641 desc { "checking if the crate has_global_allocator" }
643 query has_panic_handler(_: CrateNum) -> bool {
645 desc { "checking if the crate has_panic_handler" }
647 query is_sanitizer_runtime(_: CrateNum) -> bool {
649 desc { "query a crate is #![sanitizer_runtime]" }
651 query is_profiler_runtime(_: CrateNum) -> bool {
653 desc { "query a crate is #![profiler_runtime]" }
655 query panic_strategy(_: CrateNum) -> PanicStrategy {
657 desc { "query a crate's configured panic strategy" }
659 query is_no_builtins(_: CrateNum) -> bool {
661 desc { "test whether a crate has #![no_builtins]" }
663 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
665 desc { "query a crate's symbol mangling version" }
668 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
670 desc { "getting crate's ExternCrateData" }
675 query specializes(_: (DefId, DefId)) -> bool {
677 desc { "computing whether impls specialize one another" }
679 query in_scope_traits_map(_: DefIndex)
680 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
682 desc { "traits in scope at a block" }
687 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
693 query impl_defaultness(_: DefId) -> hir::Defaultness {}
695 query check_item_well_formed(_: DefId) -> () {}
696 query check_trait_item_well_formed(_: DefId) -> () {}
697 query check_impl_item_well_formed(_: DefId) -> () {}
701 // The `DefId`s of all non-generic functions and statics in the given crate
702 // that can be reached from outside the crate.
704 // We expect this items to be available for being linked to.
706 // This query can also be called for `LOCAL_CRATE`. In this case it will
707 // compute which items will be reachable to other crates, taking into account
708 // the kind of crate that is currently compiled. Crates with only a
709 // C interface have fewer reachable things.
711 // Does not include external symbols that don't have a corresponding DefId,
712 // like the compiler-generated `main` function and so on.
713 query reachable_non_generics(_: CrateNum)
714 -> &'tcx DefIdMap<SymbolExportLevel> {
715 desc { "looking up the exported symbols of a crate" }
717 query is_reachable_non_generic(_: DefId) -> bool {}
718 query is_unreachable_local_definition(_: DefId) -> bool {}
722 query upstream_monomorphizations(
724 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
725 desc { "collecting available upstream monomorphizations `{:?}`", k }
727 query upstream_monomorphizations_for(_: DefId)
728 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
732 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
733 desc { "looking up the foreign modules of a linked crate" }
736 /// Identifies the entry-point (e.g., the `main` function) for a given
737 /// crate, returning `None` if there is no entry point (such as for library crates).
738 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
739 desc { "looking up the entry function of a crate" }
741 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
742 desc { "looking up the plugin registrar for a crate" }
744 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
745 desc { "looking up the derive registrar for a crate" }
747 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
749 desc { "looking up the disambiguator a crate" }
751 query crate_hash(_: CrateNum) -> Svh {
753 desc { "looking up the hash a crate" }
755 query original_crate_name(_: CrateNum) -> Symbol {
757 desc { "looking up the original name a crate" }
759 query extra_filename(_: CrateNum) -> String {
761 desc { "looking up the extra filename for a crate" }
766 query implementations_of_trait(_: (CrateNum, DefId))
769 desc { "looking up implementations of a trait in a crate" }
771 query all_trait_implementations(_: CrateNum)
773 desc { "looking up all (?) trait implementations" }
778 query dllimport_foreign_items(_: CrateNum)
779 -> &'tcx FxHashSet<DefId> {
780 desc { "dllimport_foreign_items" }
782 query is_dllimport_foreign_item(_: DefId) -> bool {}
783 query is_statically_included_foreign_item(_: DefId) -> bool {}
784 query native_library_kind(_: DefId)
785 -> Option<NativeLibraryKind> {}
789 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
791 desc { "looking up link arguments for a crate" }
796 // Lifetime resolution. See `middle::resolve_lifetimes`.
797 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
798 desc { "resolving lifetimes" }
800 query named_region_map(_: DefIndex) ->
801 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
802 desc { "looking up a named region" }
804 query is_late_bound_map(_: DefIndex) ->
805 Option<&'tcx FxHashSet<ItemLocalId>> {
806 desc { "testing if a region is late bound" }
808 query object_lifetime_defaults_map(_: DefIndex)
809 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
810 desc { "looking up lifetime defaults for a region" }
815 query visibility(_: DefId) -> ty::Visibility {}
819 query dep_kind(_: CrateNum) -> DepKind {
821 desc { "fetching what a dependency looks like" }
823 query crate_name(_: CrateNum) -> Symbol {
825 desc { "fetching what a crate is named" }
827 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
828 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
830 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
832 desc { "calculating the lib features map" }
834 query defined_lib_features(_: CrateNum)
835 -> &'tcx [(Symbol, Option<Symbol>)] {
836 desc { "calculating the lib features defined in a crate" }
838 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
840 desc { "calculating the lang items map" }
842 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
843 desc { "calculating the lang items defined in a crate" }
845 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
846 desc { "calculating the missing lang items in a crate" }
848 query visible_parent_map(_: CrateNum)
849 -> &'tcx DefIdMap<DefId> {
850 desc { "calculating the visible parent map" }
852 query missing_extern_crate_item(_: CrateNum) -> bool {
854 desc { "seeing if we're missing an `extern crate` item for this crate" }
856 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
858 desc { "looking at the source for a crate" }
860 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
862 desc { "generating a postorder list of CrateNums" }
865 query upvars(_: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
868 query maybe_unused_trait_import(_: DefId) -> bool {
871 query maybe_unused_extern_crates(_: CrateNum)
872 -> &'tcx [(DefId, Span)] {
874 desc { "looking up all possibly unused extern crates" }
876 query names_imported_by_glob_use(_: DefId)
877 -> Lrc<FxHashSet<ast::Name>> {
881 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
883 desc { "calculating the stability index for the local crate" }
885 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
887 desc { "fetching all foreign CrateNum instances" }
890 /// A vector of every trait accessible in the whole crate
891 /// (i.e., including those from subcrates). This is used only for
893 query all_traits(_: CrateNum) -> &'tcx [DefId] {
894 desc { "fetching all foreign and local traits" }
899 query exported_symbols(_: CrateNum)
900 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
901 desc { "exported_symbols" }
906 query collect_and_partition_mono_items(_: CrateNum)
907 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
909 desc { "collect_and_partition_mono_items" }
911 query is_codegened_item(_: DefId) -> bool {}
912 query codegen_unit(_: InternedString) -> Arc<CodegenUnit<'tcx>> {
914 desc { "codegen_unit" }
916 query backend_optimization_level(_: CrateNum) -> OptLevel {
917 desc { "optimization level used by backend" }
922 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
924 desc { "output_filenames" }
929 /// Do not call this query directly: invoke `normalize` instead.
930 query normalize_projection_ty(
931 goal: CanonicalProjectionGoal<'tcx>
933 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
937 desc { "normalizing `{:?}`", goal }
940 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
941 query normalize_ty_after_erasing_regions(
942 goal: ParamEnvAnd<'tcx, Ty<'tcx>>
945 desc { "normalizing `{:?}`", goal }
948 query implied_outlives_bounds(
949 goal: CanonicalTyGoal<'tcx>
951 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
955 desc { "computing implied outlives bounds for `{:?}`", goal }
958 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
959 query dropck_outlives(
960 goal: CanonicalTyGoal<'tcx>
962 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
966 desc { "computing dropck types for `{:?}`", goal }
969 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
970 /// `infcx.predicate_must_hold()` instead.
971 query evaluate_obligation(
972 goal: CanonicalPredicateGoal<'tcx>
973 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
975 desc { "evaluating trait selection obligation `{}`", goal.value.value }
979 goal: traits::ChalkCanonicalGoal<'tcx>
981 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
985 desc { "evaluating trait selection obligation `{}`", goal.value.goal }
988 /// Do not call this query directly: part of the `Eq` type-op
989 query type_op_ascribe_user_type(
990 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
992 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
996 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
999 /// Do not call this query directly: part of the `Eq` type-op
1001 goal: CanonicalTypeOpEqGoal<'tcx>
1003 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1007 desc { "evaluating `type_op_eq` `{:?}`", goal }
1010 /// Do not call this query directly: part of the `Subtype` type-op
1011 query type_op_subtype(
1012 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1014 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1018 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1021 /// Do not call this query directly: part of the `ProvePredicate` type-op
1022 query type_op_prove_predicate(
1023 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1025 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1029 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1032 /// Do not call this query directly: part of the `Normalize` type-op
1033 query type_op_normalize_ty(
1034 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1036 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1040 desc { "normalizing `{:?}`", goal }
1043 /// Do not call this query directly: part of the `Normalize` type-op
1044 query type_op_normalize_predicate(
1045 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1047 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1051 desc { "normalizing `{:?}`", goal }
1054 /// Do not call this query directly: part of the `Normalize` type-op
1055 query type_op_normalize_poly_fn_sig(
1056 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1058 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1062 desc { "normalizing `{:?}`", goal }
1065 /// Do not call this query directly: part of the `Normalize` type-op
1066 query type_op_normalize_fn_sig(
1067 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1069 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1073 desc { "normalizing `{:?}`", goal }
1076 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1079 "testing substituted normalized predicates:`{}`",
1080 tcx.def_path_str(key.0)
1084 query method_autoderef_steps(
1085 goal: CanonicalTyGoal<'tcx>
1086 ) -> MethodAutoderefStepsResult<'tcx> {
1088 desc { "computing autoderef types for `{:?}`", goal }
1093 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1095 desc { "looking up the whitelist of target features" }
1098 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1099 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1102 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1105 query features_query(_: CrateNum) -> &'tcx feature_gate::Features {
1107 desc { "looking up enabled feature gates" }