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::SerializedDepNodeIndex;
6 use crate::hir::def_id::{CrateNum, DefId, DefIndex};
7 use crate::mir::interpret::GlobalId;
9 use crate::traits::query::{
10 CanonicalPredicateGoal, CanonicalProjectionGoal,
11 CanonicalTyGoal, CanonicalTypeOpAscribeUserTypeGoal,
12 CanonicalTypeOpEqGoal, CanonicalTypeOpSubtypeGoal, CanonicalTypeOpProvePredicateGoal,
13 CanonicalTypeOpNormalizeGoal,
17 use syntax_pos::symbol::InternedString;
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 { 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 { 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.alloc_generics(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(_: DefId) -> &'tcx ty::GenericPredicates<'tcx> {}
66 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
67 desc { "looking up the native libraries of a linked crate" }
70 query lint_levels(_: CrateNum) -> &'tcx lint::LintLevelMap {
72 desc { "computing the lint levels for items in this crate" }
77 query is_panic_runtime(_: CrateNum) -> bool {
79 desc { "checking if the crate is_panic_runtime" }
84 /// Set of all the `DefId`s in this crate that have MIR associated with
85 /// them. This includes all the body owners, but also things like struct
87 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
88 desc { "getting a list of all mir_keys" }
91 /// Maps DefId's that have an associated Mir to the result
92 /// of the MIR qualify_consts pass. The actual meaning of
93 /// the value isn't known except to the pass itself.
94 query mir_const_qualif(key: DefId) -> (u8, &'tcx BitSet<mir::Local>) {
95 cache { key.is_local() }
98 /// Fetch the MIR for a given `DefId` right after it's built - this includes
100 query mir_built(_: DefId) -> &'tcx Steal<mir::Mir<'tcx>> {}
102 /// Fetch the MIR for a given `DefId` up till the point where it is
103 /// ready for const evaluation.
105 /// See the README for the `mir` module for details.
106 query mir_const(_: DefId) -> &'tcx Steal<mir::Mir<'tcx>> {
110 query mir_validated(_: DefId) -> &'tcx Steal<mir::Mir<'tcx>> {
114 /// MIR after our optimization passes have run. This is MIR that is ready
115 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
116 query optimized_mir(key: DefId) -> &'tcx mir::Mir<'tcx> {
117 cache { key.is_local() }
118 load_cached(tcx, id) {
119 let mir: Option<crate::mir::Mir<'tcx>> = tcx.queries.on_disk_cache
120 .try_load_query_result(tcx, id);
121 mir.map(|x| tcx.alloc_mir(x))
127 // Erases regions from `ty` to yield a new type.
128 // Normally you would just use `tcx.erase_regions(&value)`,
129 // however, which uses this query as a kind of cache.
130 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
131 // This query is not expected to have input -- as a result, it
132 // is not a good candidates for "replay" because it is essentially a
133 // pure function of its input (and hence the expectation is that
134 // no caller would be green **apart** from just these
135 // queries). Making it anonymous avoids hashing the result, which
136 // may save a bit of time.
139 desc { "erasing regions from `{:?}`", ty }
142 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
143 desc { "generating chalk-style clauses" }
146 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
148 desc { "generating chalk-style clauses for environment" }
151 // Get the chalk-style environment of the given item.
152 query environment(_: DefId) -> traits::Environment<'tcx> {
153 desc { "return a chalk-style environment" }
158 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
159 desc { "wasm import module map" }
164 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
165 /// predicates (where-clauses) directly defined on it. This is
166 /// equal to the `explicit_predicates_of` predicates plus the
167 /// `inferred_outlives_of` predicates.
168 query predicates_defined_on(_: DefId)
169 -> &'tcx ty::GenericPredicates<'tcx> {}
171 /// Returns the predicates written explicitly by the user.
172 query explicit_predicates_of(_: DefId)
173 -> &'tcx ty::GenericPredicates<'tcx> {}
175 /// Returns the inferred outlives predicates (e.g., for `struct
176 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
177 query inferred_outlives_of(_: DefId) -> &'tcx [ty::Predicate<'tcx>] {}
179 /// Maps from the `DefId` of a trait to the list of
180 /// super-predicates. This is a subset of the full list of
181 /// predicates. We store these in a separate map because we must
182 /// evaluate them even during type conversion, often before the
183 /// full predicates are available (note that supertraits have
184 /// additional acyclicity requirements).
185 query super_predicates_of(key: DefId) -> &'tcx ty::GenericPredicates<'tcx> {
186 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
189 /// To avoid cycles within the predicates of a single item we compute
190 /// per-type-parameter predicates for resolving `T::AssocTy`.
191 query type_param_predicates(key: (DefId, DefId))
192 -> &'tcx ty::GenericPredicates<'tcx> {
194 desc { |tcx| "computing the bounds for type parameter `{}`", {
195 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
196 tcx.hir().ty_param_name(id)
200 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
201 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
202 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
204 // The cycle error here should be reported as an error by `check_representable`.
205 // We consider the type as Sized in the meanwhile to avoid
206 // further errors (done in impl Value for AdtSizedConstraint).
207 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
208 // in case we accidentally otherwise don't emit an error.
209 query adt_sized_constraint(
211 ) -> AdtSizedConstraint<'tcx> {
215 query adt_dtorck_constraint(
217 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
219 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
220 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
221 /// not have the feature gate active).
223 /// **Do not call this function manually.** It is only meant to cache the base data for the
224 /// `is_const_fn` function.
225 query is_const_fn_raw(key: DefId) -> bool {
226 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
229 /// Returns `true` if calls to the function may be promoted.
231 /// This is either because the function is e.g., a tuple-struct or tuple-variant
232 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
233 /// be removed in the future in favour of some form of check which figures out whether the
234 /// function does not inspect the bits of any of its arguments (so is essentially just a
235 /// constructor function).
236 query is_promotable_const_fn(_: DefId) -> bool {}
238 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
240 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
241 query is_foreign_item(_: DefId) -> bool {}
243 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
244 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
246 /// Gets a map with the variance of every item; use `item_variance` instead.
247 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
248 desc { "computing the variances for items in this crate" }
251 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
252 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
256 /// Maps from thee `DefId` of a type to its (inferred) outlives.
257 query inferred_outlives_crate(_: CrateNum)
258 -> &'tcx ty::CratePredicatesMap<'tcx> {
259 desc { "computing the inferred outlives predicates for items in this crate" }
264 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
265 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
267 /// Maps from a trait item to the trait item "descriptor".
268 query associated_item(_: DefId) -> ty::AssociatedItem {}
270 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
271 query impl_polarity(_: DefId) -> hir::ImplPolarity {}
273 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
277 /// Maps a `DefId` of a type to a list of its inherent impls.
278 /// Contains implementations of methods that are inherent to a type.
279 /// Methods in these implementations don't need to be exported.
280 query inherent_impls(_: DefId) -> &'tcx [DefId] {
286 /// The result of unsafety-checking this `DefId`.
287 query unsafety_check_result(_: DefId) -> mir::UnsafetyCheckResult {}
289 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
290 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
292 /// The signature of functions and closures.
293 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
297 query lint_mod(key: DefId) -> () {
298 desc { |tcx| "linting {}", key.describe_as_module(tcx) }
301 /// Checks the attributes in the module.
302 query check_mod_attrs(key: DefId) -> () {
303 desc { |tcx| "checking attributes in {}", key.describe_as_module(tcx) }
306 query check_mod_unstable_api_usage(key: DefId) -> () {
307 desc { |tcx| "checking for unstable API usage in {}", key.describe_as_module(tcx) }
310 /// Checks the loops in the module.
311 query check_mod_loops(key: DefId) -> () {
312 desc { |tcx| "checking loops in {}", key.describe_as_module(tcx) }
315 query check_mod_item_types(key: DefId) -> () {
316 desc { |tcx| "checking item types in {}", key.describe_as_module(tcx) }
319 query check_mod_privacy(key: DefId) -> () {
320 desc { |tcx| "checking privacy in {}", key.describe_as_module(tcx) }
323 query check_mod_intrinsics(key: DefId) -> () {
324 desc { |tcx| "checking intrinsics in {}", key.describe_as_module(tcx) }
327 query check_mod_liveness(key: DefId) -> () {
328 desc { |tcx| "checking liveness of variables in {}", key.describe_as_module(tcx) }
331 query check_mod_impl_wf(key: DefId) -> () {
332 desc { |tcx| "checking that impls are well-formed in {}", key.describe_as_module(tcx) }
335 query collect_mod_item_types(key: DefId) -> () {
336 desc { |tcx| "collecting item types in {}", key.describe_as_module(tcx) }
339 /// Caches `CoerceUnsized` kinds for impls on custom types.
340 query coerce_unsized_info(_: DefId)
341 -> ty::adjustment::CoerceUnsizedInfo {}
345 query typeck_item_bodies(_: CrateNum) -> () {
346 desc { "type-checking all item bodies" }
349 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
350 cache { key.is_local() }
351 load_cached(tcx, id) {
352 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
353 .queries.on_disk_cache
354 .try_load_query_result(tcx, id);
356 typeck_tables.map(|tables| tcx.alloc_tables(tables))
362 query used_trait_imports(_: DefId) -> &'tcx DefIdSet {}
366 query has_typeck_tables(_: DefId) -> bool {}
368 query coherent_trait(def_id: DefId) -> () {
369 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
374 query borrowck(_: DefId) -> &'tcx BorrowCheckResult {}
376 /// Borrow-checks the function body. If this is a closure, returns
377 /// additional requirements that the closure's creator must verify.
378 query mir_borrowck(_: DefId) -> mir::BorrowCheckResult<'tcx> {}
382 /// Gets a complete map from all types to their inherent impls.
383 /// Not meant to be used directly outside of coherence.
384 /// (Defined only for `LOCAL_CRATE`.)
385 query crate_inherent_impls(k: CrateNum)
386 -> &'tcx CrateInherentImpls {
388 desc { "all inherent impls defined in crate `{:?}`", k }
391 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
392 /// Not meant to be used directly outside of coherence.
393 /// (Defined only for `LOCAL_CRATE`.)
394 query crate_inherent_impls_overlap_check(_: CrateNum)
397 desc { "check for overlap between inherent impls defined in this crate" }
402 /// Evaluates a constant without running sanity checks.
404 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
405 /// during validation. Please add a comment to every use site explaining why using
406 /// `const_eval` isn't sufficient.
407 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
408 -> ConstEvalRawResult<'tcx> {
411 "const-evaluating `{}`",
412 tcx.def_path_str(key.value.instance.def.def_id())
415 load_cached(tcx, id) {
416 tcx.queries.on_disk_cache.try_load_query_result(tcx, id).map(Ok)
420 /// Results of evaluating const items or constants embedded in
421 /// other items (such as enum variant explicit discriminants).
422 query const_eval(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
423 -> ConstEvalResult<'tcx> {
426 "const-evaluating + checking `{}`",
427 tcx.def_path_str(key.value.instance.def.def_id())
430 load_cached(tcx, id) {
431 tcx.queries.on_disk_cache.try_load_query_result(tcx, id).map(Ok)
437 query check_match(_: DefId) -> () {}
439 /// Performs part of the privacy check and computes "access levels".
440 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
442 desc { "privacy access levels" }
444 query check_private_in_public(_: CrateNum) -> () {
446 desc { "checking for private elements in public interfaces" }
451 query reachable_set(_: CrateNum) -> ReachableSet {
452 desc { "reachability" }
455 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
456 /// in the case of closures, this will be redirected to the enclosing function.
457 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
459 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::Mir<'tcx> {
461 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
464 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
466 desc { "computing the symbol for `{}`", key }
470 query def_kind(_: DefId) -> Option<DefKind> {}
471 query def_span(_: DefId) -> Span {
472 // FIXME(mw): DefSpans are not really inputs since they are derived from
473 // HIR. But at the moment HIR hashing still contains some hacks that allow
474 // to make type debuginfo to be source location independent. Declaring
475 // DefSpan an input makes sure that changes to these are always detected
476 // regardless of HIR hashing.
479 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
480 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
481 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
485 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {}
489 query fn_arg_names(_: DefId) -> Vec<ast::Name> {}
490 /// Gets the rendered value of the specified constant or associated constant.
492 query rendered_const(_: DefId) -> String {}
493 query impl_parent(_: DefId) -> Option<DefId> {}
497 query trait_of_item(_: DefId) -> Option<DefId> {}
498 query const_is_rvalue_promotable_to_static(key: DefId) -> bool {
500 "const checking if rvalue is promotable to static `{}`",
501 tcx.def_path_str(key)
505 query rvalue_promotable_map(key: DefId) -> &'tcx ItemLocalSet {
507 "checking which parts of `{}` are promotable to static",
508 tcx.def_path_str(key)
514 query is_mir_available(key: DefId) -> bool {
515 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
520 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
521 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
523 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
528 query codegen_fulfill_obligation(
529 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
530 ) -> Vtable<'tcx, ()> {
534 "checking if `{}` fulfills its obligations",
535 tcx.def_path_str(key.1.def_id())
541 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
542 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
544 query specialization_graph_of(_: DefId) -> &'tcx specialization_graph::Graph {}
545 query is_object_safe(key: DefId) -> bool {
546 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
549 /// Gets the ParameterEnvironment for a given item; this environment
550 /// will be in "user-facing" mode, meaning that it is suitabe for
551 /// type-checking etc, and it does not normalize specializable
552 /// associated types. This is almost always what you want,
553 /// unless you are doing MIR optimizations, in which case you
554 /// might want to use `reveal_all()` method to change modes.
555 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
557 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
558 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
559 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
561 desc { "computing whether `{}` is `Copy`", env.value }
563 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
565 desc { "computing whether `{}` is `Sized`", env.value }
567 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
569 desc { "computing whether `{}` is freeze", env.value }
572 // The cycle error here should be reported as an error by `check_representable`.
573 // We consider the type as not needing drop in the meanwhile to avoid
574 // further errors (done in impl Value for NeedsDrop).
575 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
576 // in case we accidentally otherwise don't emit an error.
577 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> NeedsDrop {
580 desc { "computing whether `{}` needs drop", env.value }
584 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
585 ) -> Result<&'tcx ty::layout::LayoutDetails, ty::layout::LayoutError<'tcx>> {
587 desc { "computing layout of `{}`", env.value }
592 query dylib_dependency_formats(_: CrateNum)
593 -> &'tcx [(CrateNum, LinkagePreference)] {
594 desc { "dylib dependency formats of crate" }
599 query is_compiler_builtins(_: CrateNum) -> bool {
601 desc { "checking if the crate is_compiler_builtins" }
603 query has_global_allocator(_: CrateNum) -> bool {
605 desc { "checking if the crate has_global_allocator" }
607 query has_panic_handler(_: CrateNum) -> bool {
609 desc { "checking if the crate has_panic_handler" }
611 query is_sanitizer_runtime(_: CrateNum) -> bool {
613 desc { "query a crate is #![sanitizer_runtime]" }
615 query is_profiler_runtime(_: CrateNum) -> bool {
617 desc { "query a crate is #![profiler_runtime]" }
619 query panic_strategy(_: CrateNum) -> PanicStrategy {
621 desc { "query a crate's configured panic strategy" }
623 query is_no_builtins(_: CrateNum) -> bool {
625 desc { "test whether a crate has #![no_builtins]" }
628 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
630 desc { "getting crate's ExternCrateData" }
635 query specializes(_: (DefId, DefId)) -> bool {
637 desc { "computing whether impls specialize one another" }
639 query in_scope_traits_map(_: DefIndex)
640 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
642 desc { "traits in scope at a block" }
647 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
653 query impl_defaultness(_: DefId) -> hir::Defaultness {}
655 query check_item_well_formed(_: DefId) -> () {}
656 query check_trait_item_well_formed(_: DefId) -> () {}
657 query check_impl_item_well_formed(_: DefId) -> () {}
661 // The `DefId`s of all non-generic functions and statics in the given crate
662 // that can be reached from outside the crate.
664 // We expect this items to be available for being linked to.
666 // This query can also be called for `LOCAL_CRATE`. In this case it will
667 // compute which items will be reachable to other crates, taking into account
668 // the kind of crate that is currently compiled. Crates with only a
669 // C interface have fewer reachable things.
671 // Does not include external symbols that don't have a corresponding DefId,
672 // like the compiler-generated `main` function and so on.
673 query reachable_non_generics(_: CrateNum)
674 -> &'tcx DefIdMap<SymbolExportLevel> {
675 desc { "looking up the exported symbols of a crate" }
677 query is_reachable_non_generic(_: DefId) -> bool {}
678 query is_unreachable_local_definition(_: DefId) -> bool {}
682 query upstream_monomorphizations(
684 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
685 desc { "collecting available upstream monomorphizations `{:?}`", k }
687 query upstream_monomorphizations_for(_: DefId)
688 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
692 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
693 desc { "looking up the foreign modules of a linked crate" }
696 /// Identifies the entry-point (e.g., the `main` function) for a given
697 /// crate, returning `None` if there is no entry point (such as for library crates).
698 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
699 desc { "looking up the entry function of a crate" }
701 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
702 desc { "looking up the plugin registrar for a crate" }
704 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
705 desc { "looking up the derive registrar for a crate" }
707 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
709 desc { "looking up the disambiguator a crate" }
711 query crate_hash(_: CrateNum) -> Svh {
713 desc { "looking up the hash a crate" }
715 query original_crate_name(_: CrateNum) -> Symbol {
717 desc { "looking up the original name a crate" }
719 query extra_filename(_: CrateNum) -> String {
721 desc { "looking up the extra filename for a crate" }
726 query implementations_of_trait(_: (CrateNum, DefId))
729 desc { "looking up implementations of a trait in a crate" }
731 query all_trait_implementations(_: CrateNum)
733 desc { "looking up all (?) trait implementations" }
738 query dllimport_foreign_items(_: CrateNum)
739 -> &'tcx FxHashSet<DefId> {
740 desc { "dllimport_foreign_items" }
742 query is_dllimport_foreign_item(_: DefId) -> bool {}
743 query is_statically_included_foreign_item(_: DefId) -> bool {}
744 query native_library_kind(_: DefId)
745 -> Option<NativeLibraryKind> {}
749 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
751 desc { "looking up link arguments for a crate" }
756 // Lifetime resolution. See `middle::resolve_lifetimes`.
757 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
758 desc { "resolving lifetimes" }
760 query named_region_map(_: DefIndex) ->
761 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
762 desc { "looking up a named region" }
764 query is_late_bound_map(_: DefIndex) ->
765 Option<&'tcx FxHashSet<ItemLocalId>> {
766 desc { "testing if a region is late bound" }
768 query object_lifetime_defaults_map(_: DefIndex)
769 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
770 desc { "looking up lifetime defaults for a region" }
775 query visibility(_: DefId) -> ty::Visibility {}
779 query dep_kind(_: CrateNum) -> DepKind {
781 desc { "fetching what a dependency looks like" }
783 query crate_name(_: CrateNum) -> Symbol {
785 desc { "fetching what a crate is named" }
787 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
788 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
790 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
792 desc { "calculating the lib features map" }
794 query defined_lib_features(_: CrateNum)
795 -> &'tcx [(Symbol, Option<Symbol>)] {
796 desc { "calculating the lib features defined in a crate" }
798 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
800 desc { "calculating the lang items map" }
802 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
803 desc { "calculating the lang items defined in a crate" }
805 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
806 desc { "calculating the missing lang items in a crate" }
808 query visible_parent_map(_: CrateNum)
809 -> &'tcx DefIdMap<DefId> {
810 desc { "calculating the visible parent map" }
812 query missing_extern_crate_item(_: CrateNum) -> bool {
814 desc { "seeing if we're missing an `extern crate` item for this crate" }
816 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
818 desc { "looking at the source for a crate" }
820 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
822 desc { "generating a postorder list of CrateNums" }
825 query upvars(_: DefId) -> Option<&'tcx [hir::Upvar]> {
828 query maybe_unused_trait_import(_: DefId) -> bool {
831 query maybe_unused_extern_crates(_: CrateNum)
832 -> &'tcx [(DefId, Span)] {
834 desc { "looking up all possibly unused extern crates" }
836 query names_imported_by_glob_use(_: DefId)
837 -> Lrc<FxHashSet<ast::Name>> {
841 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
843 desc { "calculating the stability index for the local crate" }
845 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
847 desc { "fetching all foreign CrateNum instances" }
850 /// A vector of every trait accessible in the whole crate
851 /// (i.e., including those from subcrates). This is used only for
853 query all_traits(_: CrateNum) -> &'tcx [DefId] {
854 desc { "fetching all foreign and local traits" }
859 query exported_symbols(_: CrateNum)
860 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
861 desc { "exported_symbols" }
866 query collect_and_partition_mono_items(_: CrateNum)
867 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
869 desc { "collect_and_partition_mono_items" }
871 query is_codegened_item(_: DefId) -> bool {}
872 query codegen_unit(_: InternedString) -> Arc<CodegenUnit<'tcx>> {
874 desc { "codegen_unit" }
876 query backend_optimization_level(_: CrateNum) -> OptLevel {
877 desc { "optimization level used by backend" }
882 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
884 desc { "output_filenames" }
889 /// Do not call this query directly: invoke `normalize` instead.
890 query normalize_projection_ty(
891 goal: CanonicalProjectionGoal<'tcx>
893 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
897 desc { "normalizing `{:?}`", goal }
900 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
901 query normalize_ty_after_erasing_regions(
902 goal: ParamEnvAnd<'tcx, Ty<'tcx>>
905 desc { "normalizing `{:?}`", goal }
908 query implied_outlives_bounds(
909 goal: CanonicalTyGoal<'tcx>
911 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
915 desc { "computing implied outlives bounds for `{:?}`", goal }
918 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
919 query dropck_outlives(
920 goal: CanonicalTyGoal<'tcx>
922 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
926 desc { "computing dropck types for `{:?}`", goal }
929 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
930 /// `infcx.predicate_must_hold()` instead.
931 query evaluate_obligation(
932 goal: CanonicalPredicateGoal<'tcx>
933 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
935 desc { "evaluating trait selection obligation `{}`", goal.value.value }
939 goal: traits::ChalkCanonicalGoal<'tcx>
941 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
945 desc { "evaluating trait selection obligation `{}`", goal.value.goal }
948 /// Do not call this query directly: part of the `Eq` type-op
949 query type_op_ascribe_user_type(
950 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
952 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
956 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
959 /// Do not call this query directly: part of the `Eq` type-op
961 goal: CanonicalTypeOpEqGoal<'tcx>
963 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
967 desc { "evaluating `type_op_eq` `{:?}`", goal }
970 /// Do not call this query directly: part of the `Subtype` type-op
971 query type_op_subtype(
972 goal: CanonicalTypeOpSubtypeGoal<'tcx>
974 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
978 desc { "evaluating `type_op_subtype` `{:?}`", goal }
981 /// Do not call this query directly: part of the `ProvePredicate` type-op
982 query type_op_prove_predicate(
983 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
985 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
989 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
992 /// Do not call this query directly: part of the `Normalize` type-op
993 query type_op_normalize_ty(
994 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
996 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1000 desc { "normalizing `{:?}`", goal }
1003 /// Do not call this query directly: part of the `Normalize` type-op
1004 query type_op_normalize_predicate(
1005 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1007 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1011 desc { "normalizing `{:?}`", goal }
1014 /// Do not call this query directly: part of the `Normalize` type-op
1015 query type_op_normalize_poly_fn_sig(
1016 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1018 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1022 desc { "normalizing `{:?}`", goal }
1025 /// Do not call this query directly: part of the `Normalize` type-op
1026 query type_op_normalize_fn_sig(
1027 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1029 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1033 desc { "normalizing `{:?}`", goal }
1036 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1039 "testing substituted normalized predicates:`{}`",
1040 tcx.def_path_str(key.0)
1044 query method_autoderef_steps(
1045 goal: CanonicalTyGoal<'tcx>
1046 ) -> MethodAutoderefStepsResult<'tcx> {
1048 desc { "computing autoderef types for `{:?}`", goal }
1053 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1055 desc { "looking up the whitelist of target features" }
1058 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1059 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1062 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1065 query features_query(_: CrateNum) -> &'tcx feature_gate::Features {
1067 desc { "looking up enabled feature gates" }