pub enum DepKind {
Show 288 variants
Null,
Red,
TraitSelect,
CompileCodegenUnit,
CompileMonoItem,
trigger_delay_span_bug,
resolutions,
resolver_for_lowering,
source_span,
hir_crate,
hir_crate_items,
hir_module_items,
hir_owner,
local_def_id_to_hir_id,
hir_owner_parent,
hir_owner_nodes,
hir_attrs,
opt_const_param_of,
const_param_default,
type_of,
collect_trait_impl_trait_tys,
analysis,
check_expectations,
generics_of,
predicates_of,
explicit_item_bounds,
item_bounds,
native_libraries,
shallow_lint_levels_on,
lint_expectations,
parent_module_from_def_id,
expn_that_defined,
is_panic_runtime,
thir_body,
thir_tree,
mir_keys,
mir_const_qualif,
mir_const_qualif_const_arg,
mir_built,
mir_const,
thir_abstract_const,
thir_abstract_const_of_const_arg,
try_unify_abstract_consts,
mir_drops_elaborated_and_const_checked,
mir_for_ctfe,
mir_for_ctfe_of_const_arg,
mir_promoted,
symbols_for_closure_captures,
optimized_mir,
coverageinfo,
covered_code_regions,
promoted_mir,
promoted_mir_of_const_arg,
erase_regions_ty,
wasm_import_module_map,
predicates_defined_on,
trait_explicit_predicates_and_bounds,
explicit_predicates_of,
inferred_outlives_of,
super_predicates_of,
super_predicates_that_define_assoc_type,
type_param_predicates,
trait_def,
adt_def,
adt_destructor,
adt_sized_constraint,
adt_dtorck_constraint,
constness,
asyncness,
is_promotable_const_fn,
is_foreign_item,
generator_kind,
crate_variances,
variances_of,
inferred_outlives_crate,
associated_item_def_ids,
associated_item,
associated_items,
impl_item_implementor_ids,
impl_trait_ref,
impl_polarity,
issue33140_self_ty,
inherent_impls,
incoherent_impls,
unsafety_check_result,
unsafety_check_result_for_const_arg,
thir_check_unsafety,
thir_check_unsafety_for_const_arg,
unsafe_derive_on_repr_packed,
assumed_wf_types,
fn_sig,
lint_mod,
check_mod_attrs,
check_mod_unstable_api_usage,
check_mod_const_bodies,
check_mod_loops,
check_mod_naked_functions,
check_mod_item_types,
check_mod_privacy,
check_liveness,
live_symbols_and_ignored_derived_traits,
check_mod_deathness,
check_mod_impl_wf,
check_mod_type_wf,
collect_mod_item_types,
coerce_unsized_info,
typeck_item_bodies,
typeck,
typeck_const_arg,
diagnostic_only_typeck,
used_trait_imports,
has_typeck_results,
coherent_trait,
mir_borrowck,
mir_borrowck_const_arg,
crate_inherent_impls,
crate_inherent_impls_overlap_check,
orphan_check_impl,
mir_callgraph_reachable,
mir_inliner_callees,
eval_to_allocation_raw,
eval_to_const_value_raw,
eval_to_valtree,
valtree_to_const_val,
destructure_const,
try_destructure_mir_constant,
deref_mir_constant,
const_caller_location,
lit_to_const,
lit_to_mir_constant,
check_match,
privacy_access_levels,
check_private_in_public,
reachable_set,
region_scope_tree,
mir_shims,
symbol_name,
opt_def_kind,
def_span,
def_ident_span,
lookup_stability,
lookup_const_stability,
lookup_default_body_stability,
should_inherit_track_caller,
lookup_deprecation_entry,
is_doc_hidden,
item_attrs,
codegen_fn_attrs,
asm_target_features,
fn_arg_names,
rendered_const,
impl_parent,
is_ctfe_mir_available,
is_mir_available,
own_existential_vtable_entries,
vtable_entries,
vtable_trait_upcasting_coercion_new_vptr_slot,
vtable_allocation,
codegen_select_candidate,
all_local_trait_impls,
trait_impls_of,
specialization_graph_of,
object_safety_violations,
param_env,
param_env_reveal_all_normalized,
is_copy_raw,
is_sized_raw,
is_freeze_raw,
is_unpin_raw,
needs_drop_raw,
has_significant_drop_raw,
has_structural_eq_impls,
adt_drop_tys,
adt_significant_drop_tys,
layout_of,
fn_abi_of_fn_ptr,
fn_abi_of_instance,
dylib_dependency_formats,
dependency_formats,
is_compiler_builtins,
has_global_allocator,
has_panic_handler,
is_profiler_runtime,
has_ffi_unwind_calls,
required_panic_strategy,
panic_in_drop_strategy,
is_no_builtins,
symbol_mangling_version,
extern_crate,
specializes,
in_scope_traits_map,
module_reexports,
impl_defaultness,
check_well_formed,
reachable_non_generics,
is_reachable_non_generic,
is_unreachable_local_definition,
upstream_monomorphizations,
upstream_monomorphizations_for,
upstream_drop_glue_for,
foreign_modules,
entry_fn,
proc_macro_decls_static,
crate_hash,
crate_host_hash,
extra_filename,
crate_extern_paths,
implementations_of_trait,
crate_incoherent_impls,
is_dllimport_foreign_item,
is_statically_included_foreign_item,
native_library_kind,
native_library,
resolve_lifetimes_trait_definition,
resolve_lifetimes,
named_region_map,
is_late_bound_map,
object_lifetime_default,
late_bound_vars_map,
visibility,
type_uninhabited_from,
dep_kind,
crate_name,
module_children,
extern_mod_stmt_cnum,
lib_features,
defined_lib_features,
stability_implications,
is_intrinsic,
get_lang_items,
all_diagnostic_items,
defined_lang_items,
diagnostic_items,
missing_lang_items,
visible_parent_map,
trimmed_def_paths,
missing_extern_crate_item,
used_crate_source,
debugger_visualizers,
postorder_cnums,
is_private_dep,
allocator_kind,
upvars_mentioned,
maybe_unused_trait_imports,
maybe_unused_extern_crates,
names_imported_by_glob_use,
stability_index,
crates,
traits_in_crate,
exported_symbols,
collect_and_partition_mono_items,
is_codegened_item,
codegened_and_inlined_items,
codegen_unit,
unused_generic_params,
backend_optimization_level,
output_filenames,
normalize_projection_ty,
try_normalize_generic_arg_after_erasing_regions,
try_normalize_mir_const_after_erasing_regions,
implied_outlives_bounds,
dropck_outlives,
evaluate_obligation,
evaluate_goal,
type_op_ascribe_user_type,
type_op_eq,
type_op_subtype,
type_op_prove_predicate,
type_op_normalize_ty,
type_op_normalize_predicate,
type_op_normalize_poly_fn_sig,
type_op_normalize_fn_sig,
subst_and_check_impossible_predicates,
is_impossible_method,
method_autoderef_steps,
supported_target_features,
instance_def_size_estimate,
features_query,
resolve_instance,
resolve_instance_of_const_arg,
normalize_opaque_types,
conservative_is_privately_uninhabited,
limits,
diagnostic_hir_wf_check,
global_backend_features,
generator_diagnostic_data,
permits_uninit_init,
permits_zero_init,
}
Expand description
This enum serves as an index into arrays built by make_dep_kind_array
.
Variants
Null
We use this for most things when incr. comp. is turned off.
Red
We use this to create a forever-red node.
TraitSelect
CompileCodegenUnit
CompileMonoItem
trigger_delay_span_bug
[query description - consider adding a doc-comment!] trigger a delay span bug
resolutions
[query description - consider adding a doc-comment!] get the resolver outputs
resolver_for_lowering
[query description - consider adding a doc-comment!] get the resolver for lowering
source_span
Return the span for a definition.
Contrary to def_span
below, this query returns the full absolute span of the definition.
This span is meant for dep-tracking rather than diagnostics. It should not be used outside
of rustc_middle::hir::source_map.
hir_crate
Represents crate as a whole (as distinct from the top-level crate module).
If you call hir_crate
(e.g., indirectly by calling tcx.hir().krate()
),
we will have to assume that any change means that you need to be recompiled.
This is because the hir_crate
query gives you access to all other items.
To avoid this fate, do not call tcx.hir().krate()
; instead,
prefer wrappers like tcx.visit_all_items_in_krate()
.
hir_crate_items
All items in the crate.
hir_module_items
The items in a module.
This can be conveniently accessed by tcx.hir().visit_item_likes_in_module
.
Avoid calling this query directly.
hir_owner
Gives access to the HIR node for the HIR owner key
.
This can be conveniently accessed by methods on tcx.hir()
.
Avoid calling this query directly.
local_def_id_to_hir_id
Gives access to the HIR ID for the given LocalDefId
owner key
.
This can be conveniently accessed by methods on tcx.hir()
.
Avoid calling this query directly.
hir_owner_parent
Gives access to the HIR node’s parent for the HIR owner key
.
This can be conveniently accessed by methods on tcx.hir()
.
Avoid calling this query directly.
hir_owner_nodes
Gives access to the HIR nodes and bodies inside the HIR owner key
.
This can be conveniently accessed by methods on tcx.hir()
.
Avoid calling this query directly.
hir_attrs
Gives access to the HIR attributes inside the HIR owner key
.
This can be conveniently accessed by methods on tcx.hir()
.
Avoid calling this query directly.
opt_const_param_of
Computes the DefId
of the corresponding const parameter in case the key
is a
const argument and returns None
otherwise.
let a = foo::<7>();
// ^ Calling `opt_const_param_of` for this argument,
fn foo<const N: usize>()
// ^ returns this `DefId`.
fn bar() {
// ^ While calling `opt_const_param_of` for other bodies returns `None`.
}
const_param_default
Given the def_id of a const-generic parameter, computes the associated default const
parameter. e.g. fn example<const N: usize=3>
called on N
would return 3
.
type_of
Returns the Ty
of the given DefId
. If the DefId
points
to an alias, it will “skip” this alias to return the aliased type.
collect_trait_impl_trait_tys
[query description - consider adding a doc-comment!] compare an impl and trait method signature, inferring any hidden impl Trait
types in the process
analysis
[query description - consider adding a doc-comment!] running analysis passes on this crate
check_expectations
This query checks the fulfillment of collected lint expectations. All lint emitting queries have to be done before this is executed to ensure that all expectations can be fulfilled.
This is an extra query to enable other drivers (like rustdoc) to
only execute a small subset of the analysis
query, while allowing
lints to be expected. In rustc, this query will be executed as part of
the analysis
query and doesn’t have to be called a second time.
Tools can additionally pass in a tool filter. That will restrict the
expectations to only trigger for lints starting with the listed tool
name. This is useful for cases were not all linting code from rustc
was called. With the default None
all registered lints will also
be checked for expectation fulfillment.
generics_of
Maps from the DefId
of an item (trait/struct/enum/fn) to its
associated generics.
predicates_of
Maps from the DefId
of an item (trait/struct/enum/fn) to the
predicates (where-clauses) that must be proven true in order
to reference it. This is almost always the “predicates query”
that you want.
predicates_of
builds on predicates_defined_on
– in fact,
it is almost always the same as that query, except for the
case of traits. For traits, predicates_of
contains
an additional Self: Trait<...>
predicate that users don’t
actually write. This reflects the fact that to invoke the
trait (e.g., via Default::default
) you must supply types
that actually implement the trait. (However, this extra
predicate gets in the way of some checks, which are intended
to operate over only the actual where-clauses written by the
user.)
explicit_item_bounds
Returns the list of bounds that can be used for
SelectionCandidate::ProjectionCandidate(_)
and
ProjectionTyCandidate::TraitDef
.
Specifically this is the bounds written on the trait’s type
definition, or those after the impl
keyword
type X: Bound + 'lt
// ^^^^^^^^^^^
impl Debug + Display
// ^^^^^^^^^^^^^^^
key
is the DefId
of the associated type or opaque type.
Bounds from the parent (e.g. with nested impl trait) are not included.
item_bounds
Elaborated version of the predicates from explicit_item_bounds
.
For example:
trait MyTrait {
type MyAType: Eq + ?Sized;
}
explicit_item_bounds
returns [<Self as MyTrait>::MyAType: Eq]
,
and item_bounds
returns
[
<Self as Trait>::MyAType: Eq,
<Self as Trait>::MyAType: PartialEq<<Self as Trait>::MyAType>
]
Bounds from the parent (e.g. with nested impl trait) are not included.
native_libraries
[query description - consider adding a doc-comment!] looking up the native libraries of a linked crate
shallow_lint_levels_on
[query description - consider adding a doc-comment!] looking up lint levels for key
lint_expectations
[query description - consider adding a doc-comment!] computing #[expect]
ed lints in this crate
parent_module_from_def_id
[query description - consider adding a doc-comment!] parent module of tcx.def_path_str(key.to_def_id())
expn_that_defined
[query description - consider adding a doc-comment!] expansion that defined tcx.def_path_str(key)
is_panic_runtime
[query description - consider adding a doc-comment!] checking if the crate is_panic_runtime
thir_body
Fetch the THIR for a given body. If typeck for that body failed, returns an empty Thir
.
thir_tree
Create a THIR tree for debugging.
mir_keys
Set of all the DefId
s in this crate that have MIR associated with
them. This includes all the body owners, but also things like struct
constructors.
mir_const_qualif
Maps DefId’s that have an associated mir::Body
to the result
of the MIR const-checking pass. This is the set of qualifs in
the final value of a const
.
mir_const_qualif_const_arg
[query description - consider adding a doc-comment!] const checking the const argument tcx.def_path_str(key.0.to_def_id())
mir_built
Fetch the MIR for a given DefId
right after it’s built - this includes
unreachable code.
mir_const
Fetch the MIR for a given DefId
up till the point where it is
ready for const qualification.
See the README for the mir
module for details.
thir_abstract_const
Try to build an abstract representation of the given constant.
thir_abstract_const_of_const_arg
Try to build an abstract representation of the given constant.
try_unify_abstract_consts
[query description - consider adding a doc-comment!] trying to unify the generic constants tcx.def_path_str(key.value.0.def.did)
and tcx.def_path_str(key.value.1.def.did)
mir_drops_elaborated_and_const_checked
[query description - consider adding a doc-comment!] elaborating drops for tcx.def_path_str(key.did.to_def_id())
mir_for_ctfe
[query description - consider adding a doc-comment!] caching mir of tcx.def_path_str(key)
for CTFE
mir_for_ctfe_of_const_arg
[query description - consider adding a doc-comment!] MIR for CTFE of the const argument tcx.def_path_str(key.0.to_def_id())
mir_promoted
[query description - consider adding a doc-comment!] processing if key.const_param_did.is_some() { "the const argument " } else { "" }
tcx.def_path_str(key.did.to_def_id())
symbols_for_closure_captures
[query description - consider adding a doc-comment!] symbols for captures of closure tcx.def_path_str(key.1.to_def_id())
in tcx.def_path_str(key.0.to_def_id())
optimized_mir
MIR after our optimization passes have run. This is MIR that is ready for codegen. This is also the only query that can fetch non-local MIR, at present.
coverageinfo
Returns coverage summary info for a function, after executing the InstrumentCoverage
MIR pass (assuming the -Cinstrument-coverage option is enabled).
covered_code_regions
Returns the CodeRegions
for a function that has instrumented coverage, in case the
function was optimized out before codegen, and before being added to the Coverage Map.
promoted_mir
The DefId
is the DefId
of the containing MIR body. Promoteds do not have their own
DefId
. This function returns all promoteds in the specified body. The body references
promoteds by the DefId
and the mir::Promoted
index. This is necessary, because
after inlining a body may refer to promoteds from other bodies. In that case you still
need to use the DefId
of the original body.
promoted_mir_of_const_arg
[query description - consider adding a doc-comment!] optimizing promoted MIR for the const argument tcx.def_path_str(key.0.to_def_id())
erase_regions_ty
Erases regions from ty
to yield a new type.
Normally you would just use tcx.erase_regions(value)
,
however, which uses this query as a kind of cache.
wasm_import_module_map
[query description - consider adding a doc-comment!] wasm import module map
predicates_defined_on
Maps from the DefId
of an item (trait/struct/enum/fn) to the
predicates (where-clauses) directly defined on it. This is
equal to the explicit_predicates_of
predicates plus the
inferred_outlives_of
predicates.
trait_explicit_predicates_and_bounds
Returns everything that looks like a predicate written explicitly by the user on a trait item.
Traits are unusual, because predicates on associated types are converted into bounds on that type for backwards compatibility:
trait X where Self::U: Copy { type U; }
becomes
trait X { type U: Copy; }
explicit_predicates_of
and explicit_item_bounds
will then take
the appropriate subsets of the predicates here.
explicit_predicates_of
Returns the predicates written explicitly by the user.
inferred_outlives_of
Returns the inferred outlives predicates (e.g., for struct Foo<'a, T> { x: &'a T }
, this would return T: 'a
).
super_predicates_of
Maps from the DefId
of a trait to the list of
super-predicates. This is a subset of the full list of
predicates. We store these in a separate map because we must
evaluate them even during type conversion, often before the
full predicates are available (note that supertraits have
additional acyclicity requirements).
super_predicates_that_define_assoc_type
The Option<Ident>
is the name of an associated type. If it is None
, then this query
returns the full set of predicates. If Some<Ident>
, then the query returns only the
subset of super-predicates that reference traits that define the given associated type.
This is used to avoid cycles in resolving types like T::Item
.
type_param_predicates
To avoid cycles within the predicates of a single item we compute
per-type-parameter predicates for resolving T::AssocTy
.
trait_def
[query description - consider adding a doc-comment!] computing trait definition for tcx.def_path_str(key)
adt_def
[query description - consider adding a doc-comment!] computing ADT definition for tcx.def_path_str(key)
adt_destructor
[query description - consider adding a doc-comment!] computing Drop
impl for tcx.def_path_str(key)
adt_sized_constraint
[query description - consider adding a doc-comment!] computing Sized
constraints for tcx.def_path_str(key)
adt_dtorck_constraint
[query description - consider adding a doc-comment!] computing drop-check constraints for tcx.def_path_str(key)
constness
Returns true
if this is a const fn, use the is_const_fn
to know whether your crate
actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
not have the feature gate active).
Do not call this function manually. It is only meant to cache the base data for the
is_const_fn
function. Consider using is_const_fn
or is_const_fn_raw
instead.
asyncness
[query description - consider adding a doc-comment!] checking if the function is async: tcx.def_path_str(key)
is_promotable_const_fn
Returns true
if calls to the function may be promoted.
This is either because the function is e.g., a tuple-struct or tuple-variant
constructor, or because it has the #[rustc_promotable]
attribute. The attribute should
be removed in the future in favour of some form of check which figures out whether the
function does not inspect the bits of any of its arguments (so is essentially just a
constructor function).
is_foreign_item
Returns true
if this is a foreign item (i.e., linked via extern { ... }
).
generator_kind
Returns Some(generator_kind)
if the node pointed to by def_id
is a generator.
crate_variances
Gets a map with the variance of every item; use item_variance
instead.
variances_of
Maps from the DefId
of a type or region parameter to its (inferred) variance.
inferred_outlives_crate
Maps from thee DefId
of a type to its (inferred) outlives.
associated_item_def_ids
Maps from an impl/trait DefId
to a list of the DefId
s of its items.
associated_item
Maps from a trait item to the trait item “descriptor”.
associated_items
Collects the associated items defined on a trait or impl.
impl_item_implementor_ids
Maps from associated items on a trait to the corresponding associated
item on the impl specified by impl_id
.
For example, with the following code
struct Type {}
// DefId
trait Trait { // trait_id
fn f(); // trait_f
fn g() {} // trait_g
}
impl Trait for Type { // impl_id
fn f() {} // impl_f
fn g() {} // impl_g
}
The map returned for tcx.impl_item_implementor_ids(impl_id)
would be
{ trait_f: impl_f, trait_g: impl_g }
impl_trait_ref
Given an impl_id
, return the trait it implements.
Return None
if this is an inherent impl.
impl_polarity
[query description - consider adding a doc-comment!] computing implementation polarity of tcx.def_path_str(impl_id)
issue33140_self_ty
[query description - consider adding a doc-comment!] computing Self type wrt issue #33140 tcx.def_path_str(key)
inherent_impls
Maps a DefId
of a type to a list of its inherent impls.
Contains implementations of methods that are inherent to a type.
Methods in these implementations don’t need to be exported.
incoherent_impls
[query description - consider adding a doc-comment!] collecting all inherent impls for {:?}
unsafety_check_result
The result of unsafety-checking this LocalDefId
.
unsafety_check_result_for_const_arg
[query description - consider adding a doc-comment!] unsafety-checking the const argument tcx.def_path_str(key.0.to_def_id())
thir_check_unsafety
Unsafety-check this LocalDefId
with THIR unsafeck. This should be
used with -Zthir-unsafeck
.
thir_check_unsafety_for_const_arg
[query description - consider adding a doc-comment!] unsafety-checking the const argument tcx.def_path_str(key.0.to_def_id())
unsafe_derive_on_repr_packed
HACK: when evaluated, this reports an “unsafe derive on repr(packed)” error.
Unsafety checking is executed for each method separately, but we only want to emit this error once per derive. As there are some impls with multiple methods, we use a query for deduplication.
assumed_wf_types
Returns the types assumed to be well formed while “inside” of the given item.
Note that we’ve liberated the late bound regions of function signatures, so this can not be used to check whether these types are well formed.
fn_sig
Computes the signature of the function.
lint_mod
Performs lint checking for the module.
check_mod_attrs
Checks the attributes in the module.
check_mod_unstable_api_usage
Checks for uses of unstable APIs in the module.
check_mod_const_bodies
Checks the const bodies in the module for illegal operations (e.g. if
or loop
).
check_mod_loops
Checks the loops in the module.
check_mod_naked_functions
[query description - consider adding a doc-comment!] checking naked functions in describe_as_module(key, tcx)
check_mod_item_types
[query description - consider adding a doc-comment!] checking item types in describe_as_module(key, tcx)
check_mod_privacy
[query description - consider adding a doc-comment!] checking privacy in describe_as_module(key, tcx)
check_liveness
[query description - consider adding a doc-comment!] checking liveness of variables in tcx.def_path_str(key)
live_symbols_and_ignored_derived_traits
Return the live symbols in the crate for dead code check.
The second return value maps from ADTs to ignored derived traits (e.g. Debug and Clone) and their respective impl (i.e., part of the derive macro)
check_mod_deathness
[query description - consider adding a doc-comment!] checking deathness of variables in describe_as_module(key, tcx)
check_mod_impl_wf
[query description - consider adding a doc-comment!] checking that impls are well-formed in describe_as_module(key, tcx)
check_mod_type_wf
[query description - consider adding a doc-comment!] checking that types are well-formed in describe_as_module(key, tcx)
collect_mod_item_types
[query description - consider adding a doc-comment!] collecting item types in describe_as_module(key, tcx)
coerce_unsized_info
Caches CoerceUnsized
kinds for impls on custom types.
typeck_item_bodies
[query description - consider adding a doc-comment!] type-checking all item bodies
typeck
[query description - consider adding a doc-comment!] type-checking tcx.def_path_str(key.to_def_id())
typeck_const_arg
[query description - consider adding a doc-comment!] type-checking the const argument tcx.def_path_str(key.0.to_def_id())
diagnostic_only_typeck
[query description - consider adding a doc-comment!] type-checking tcx.def_path_str(key.to_def_id())
used_trait_imports
[query description - consider adding a doc-comment!] used_trait_imports tcx.def_path_str(key.to_def_id())
has_typeck_results
[query description - consider adding a doc-comment!] checking whether tcx.def_path_str(def_id)
has a body
coherent_trait
[query description - consider adding a doc-comment!] coherence checking all impls of trait tcx.def_path_str(def_id)
mir_borrowck
Borrow-checks the function body. If this is a closure, returns additional requirements that the closure’s creator must verify.
mir_borrowck_const_arg
[query description - consider adding a doc-comment!] borrow-checking the const argument tcx.def_path_str(key.0.to_def_id())
crate_inherent_impls
Gets a complete map from all types to their inherent impls. Not meant to be used directly outside of coherence.
crate_inherent_impls_overlap_check
Checks all types in the crate for overlap in their inherent impls. Reports errors. Not meant to be used directly outside of coherence.
orphan_check_impl
Checks whether all impls in the crate pass the overlap check, returning which impls fail it. If all impls are correct, the returned slice is empty.
mir_callgraph_reachable
Check whether the function has any recursion that could cause the inliner to trigger a cycle. Returns the call stack causing the cycle. The call stack does not contain the current function, just all intermediate functions.
mir_inliner_callees
Obtain all the calls into other local functions
eval_to_allocation_raw
Evaluates a constant and returns the computed allocation.
Do not use this directly, use the tcx.eval_static_initializer
wrapper.
eval_to_const_value_raw
Evaluates const items or anonymous constants (such as enum variant explicit discriminants or array lengths) into a representation suitable for the type system and const generics.
Do not use this directly, use one of the following wrappers: tcx.const_eval_poly
,
tcx.const_eval_resolve
, tcx.const_eval_instance
, or tcx.const_eval_global_id
.
eval_to_valtree
Evaluate a constant and convert it to a type level constant or
return None
if that is not possible.
valtree_to_const_val
Converts a type level constant value into ConstValue
destructure_const
Destructures array, ADT or tuple constants into the constants of their fields.
try_destructure_mir_constant
Tries to destructure an mir::ConstantKind
ADT or array into its variant index
and its field values.
deref_mir_constant
Dereference a constant reference or raw pointer and turn the result into a constant again.
const_caller_location
[query description - consider adding a doc-comment!] get a &core::panic::Location referring to a span
lit_to_const
[query description - consider adding a doc-comment!] converting literal to const
lit_to_mir_constant
[query description - consider adding a doc-comment!] converting literal to mir constant
check_match
[query description - consider adding a doc-comment!] match-checking tcx.def_path_str(key)
privacy_access_levels
Performs part of the privacy check and computes “access levels”.
check_private_in_public
[query description - consider adding a doc-comment!] checking for private elements in public interfaces
reachable_set
[query description - consider adding a doc-comment!] reachability
region_scope_tree
Per-body region::ScopeTree
. The DefId
should be the owner DefId
for the body;
in the case of closures, this will be redirected to the enclosing function.
mir_shims
Generates a MIR body for the shim.
symbol_name
The symbol_name
query provides the symbol name for calling a
given instance from the local crate. In particular, it will also
look up the correct symbol name of instances from upstream crates.
opt_def_kind
[query description - consider adding a doc-comment!] looking up definition kind of tcx.def_path_str(def_id)
def_span
Gets the span for the definition.
def_ident_span
Gets the span for the identifier of the definition.
lookup_stability
[query description - consider adding a doc-comment!] looking up stability of tcx.def_path_str(def_id)
lookup_const_stability
[query description - consider adding a doc-comment!] looking up const stability of tcx.def_path_str(def_id)
lookup_default_body_stability
[query description - consider adding a doc-comment!] looking up default body stability of tcx.def_path_str(def_id)
should_inherit_track_caller
[query description - consider adding a doc-comment!] computing should_inherit_track_caller of tcx.def_path_str(def_id)
lookup_deprecation_entry
[query description - consider adding a doc-comment!] checking whether tcx.def_path_str(def_id)
is deprecated
is_doc_hidden
Determines whether an item is annotated with doc(hidden)
.
item_attrs
Returns the attributes on the item at def_id
.
Do not use this directly, use tcx.get_attrs
instead.
codegen_fn_attrs
[query description - consider adding a doc-comment!] computing codegen attributes of tcx.def_path_str(def_id)
asm_target_features
[query description - consider adding a doc-comment!] computing target features for inline asm of tcx.def_path_str(def_id)
fn_arg_names
[query description - consider adding a doc-comment!] looking up function parameter names for tcx.def_path_str(def_id)
rendered_const
Gets the rendered value of the specified constant or associated constant. Used by rustdoc.
impl_parent
[query description - consider adding a doc-comment!] computing specialization parent impl of tcx.def_path_str(def_id)
is_ctfe_mir_available
[query description - consider adding a doc-comment!] checking if item has ctfe mir available: tcx.def_path_str(key)
is_mir_available
[query description - consider adding a doc-comment!] checking if item has mir available: tcx.def_path_str(key)
own_existential_vtable_entries
[query description - consider adding a doc-comment!] finding all existential vtable entries for trait tcx.def_path_str(key.def_id())
vtable_entries
[query description - consider adding a doc-comment!] finding all vtable entries for trait tcx.def_path_str(key.def_id())
vtable_trait_upcasting_coercion_new_vptr_slot
[query description - consider adding a doc-comment!] finding the slot within vtable for trait object key.1
vtable ptr during trait upcasting coercion from key.0
vtable
vtable_allocation
[query description - consider adding a doc-comment!] vtable const allocation for < key.0
as key.1.map(| trait_ref | format! ("{}", trait_ref)).unwrap_or("_".to_owned())
>
codegen_select_candidate
[query description - consider adding a doc-comment!] computing candidate for key.1
all_local_trait_impls
Return all impl
blocks in the current crate.
trait_impls_of
Given a trait trait_id
, return all known impl
blocks.
specialization_graph_of
[query description - consider adding a doc-comment!] building specialization graph of trait tcx.def_path_str(trait_id)
object_safety_violations
[query description - consider adding a doc-comment!] determine object safety of trait tcx.def_path_str(trait_id)
param_env
Gets the ParameterEnvironment for a given item; this environment
will be in “user-facing” mode, meaning that it is suitable for
type-checking etc, and it does not normalize specializable
associated types. This is almost always what you want,
unless you are doing MIR optimizations, in which case you
might want to use reveal_all()
method to change modes.
param_env_reveal_all_normalized
Like param_env
, but returns the ParamEnv
in Reveal::All
mode.
Prefer this over tcx.param_env(def_id).with_reveal_all_normalized(tcx)
,
as this method is more efficient.
is_copy_raw
Trait selection queries. These are best used by invoking ty.is_copy_modulo_regions()
,
ty.is_copy()
, etc, since that will prune the environment where possible.
is_sized_raw
Query backing Ty::is_sized
.
is_freeze_raw
Query backing Ty::is_freeze
.
is_unpin_raw
Query backing Ty::is_unpin
.
needs_drop_raw
Query backing Ty::needs_drop
.
has_significant_drop_raw
Query backing Ty::has_significant_drop_raw
.
has_structural_eq_impls
Query backing Ty::is_structural_eq_shallow
.
This is only correct for ADTs. Call is_structural_eq_shallow
to handle all types
correctly.
adt_drop_tys
A list of types where the ADT requires drop if and only if any of
those types require drop. If the ADT is known to always need drop
then Err(AlwaysRequiresDrop)
is returned.
adt_significant_drop_tys
A list of types where the ADT requires drop if and only if any of those types
has significant drop. A type marked with the attribute rustc_insignificant_dtor
is considered to not be significant. A drop is significant if it is implemented
by the user or does anything that will have any observable behavior (other than
freeing up memory). If the ADT is known to have a significant destructor then
Err(AlwaysRequiresDrop)
is returned.
layout_of
Computes the layout of a type. Note that this implicitly executes in “reveal all” mode, and will normalize the input type.
fn_abi_of_fn_ptr
Compute a FnAbi
suitable for indirect calls, i.e. to fn
pointers.
NB: this doesn’t handle virtual calls - those should use fn_abi_of_instance
instead, where the instance is an InstanceDef::Virtual
.
fn_abi_of_instance
Compute a FnAbi
suitable for declaring/defining an fn
instance, and for
direct calls to an fn
.
NB: that includes virtual calls, which are represented by “direct calls”
to an InstanceDef::Virtual
instance (of <dyn Trait as Trait>::fn
).
dylib_dependency_formats
[query description - consider adding a doc-comment!] dylib dependency formats of crate
dependency_formats
[query description - consider adding a doc-comment!] get the linkage format of all dependencies
is_compiler_builtins
[query description - consider adding a doc-comment!] checking if the crate is_compiler_builtins
has_global_allocator
[query description - consider adding a doc-comment!] checking if the crate has_global_allocator
has_panic_handler
[query description - consider adding a doc-comment!] checking if the crate has_panic_handler
is_profiler_runtime
[query description - consider adding a doc-comment!] query a crate is #![profiler_runtime]
has_ffi_unwind_calls
[query description - consider adding a doc-comment!] check if tcx.def_path_str(key.to_def_id())
contains FFI-unwind calls
required_panic_strategy
[query description - consider adding a doc-comment!] query a crate’s required panic strategy
panic_in_drop_strategy
[query description - consider adding a doc-comment!] query a crate’s configured panic-in-drop strategy
is_no_builtins
[query description - consider adding a doc-comment!] test whether a crate has #![no_builtins]
symbol_mangling_version
[query description - consider adding a doc-comment!] query a crate’s symbol mangling version
extern_crate
[query description - consider adding a doc-comment!] getting crate’s ExternCrateData
specializes
[query description - consider adding a doc-comment!] computing whether impls specialize one another
in_scope_traits_map
[query description - consider adding a doc-comment!] traits in scope at a block
module_reexports
[query description - consider adding a doc-comment!] looking up reexports of module tcx.def_path_str(def_id.to_def_id())
impl_defaultness
[query description - consider adding a doc-comment!] looking up whether tcx.def_path_str(def_id)
is a default impl
check_well_formed
[query description - consider adding a doc-comment!] checking that tcx.def_path_str(key.to_def_id())
is well-formed
reachable_non_generics
[query description - consider adding a doc-comment!] looking up the exported symbols of a crate
is_reachable_non_generic
[query description - consider adding a doc-comment!] checking whether tcx.def_path_str(def_id)
is an exported symbol
is_unreachable_local_definition
[query description - consider adding a doc-comment!] checking whether tcx.def_path_str(def_id.to_def_id())
is reachable from outside the crate
upstream_monomorphizations
The entire set of monomorphizations the local crate can safely link
to because they are exported from upstream crates. Do not depend on
this directly, as its value changes anytime a monomorphization gets
added or removed in any upstream crate. Instead use the narrower
upstream_monomorphizations_for
, upstream_drop_glue_for
, or, even
better, Instance::upstream_monomorphization()
.
upstream_monomorphizations_for
Returns the set of upstream monomorphizations available for the
generic function identified by the given def_id
. The query makes
sure to make a stable selection if the same monomorphization is
available in multiple upstream crates.
You likely want to call Instance::upstream_monomorphization()
instead of invoking this query directly.
upstream_drop_glue_for
Returns the upstream crate that exports drop-glue for the given
type (substs
is expected to be a single-item list containing the
type one wants drop-glue for).
This is a subset of upstream_monomorphizations_for
in order to
increase dep-tracking granularity. Otherwise adding or removing any
type with drop-glue in any upstream crate would invalidate all
functions calling drop-glue of an upstream type.
You likely want to call Instance::upstream_monomorphization()
instead of invoking this query directly.
NOTE: This query could easily be extended to also support other
common functions that have are large set of monomorphizations
(like Clone::clone
for example).
foreign_modules
[query description - consider adding a doc-comment!] looking up the foreign modules of a linked crate
entry_fn
Identifies the entry-point (e.g., the main
function) for a given
crate, returning None
if there is no entry point (such as for library crates).
proc_macro_decls_static
[query description - consider adding a doc-comment!] looking up the derive registrar for a crate
crate_hash
[query description - consider adding a doc-comment!] looking up the hash a crate
crate_host_hash
[query description - consider adding a doc-comment!] looking up the hash of a host version of a crate
extra_filename
[query description - consider adding a doc-comment!] looking up the extra filename for a crate
crate_extern_paths
[query description - consider adding a doc-comment!] looking up the paths for extern crates
implementations_of_trait
Given a crate and a trait, look up all impls of that trait in the crate.
Return (impl_id, self_ty)
.
crate_incoherent_impls
Collects all incoherent impls for the given crate and type.
Do not call this directly, but instead use the incoherent_impls
query.
This query is only used to get the data necessary for that query.
is_dllimport_foreign_item
[query description - consider adding a doc-comment!] is_dllimport_foreign_item( tcx.def_path_str(def_id)
)
is_statically_included_foreign_item
[query description - consider adding a doc-comment!] is_statically_included_foreign_item( tcx.def_path_str(def_id)
)
native_library_kind
[query description - consider adding a doc-comment!] native_library_kind( tcx.def_path_str(def_id)
)
native_library
[query description - consider adding a doc-comment!] native_library( tcx.def_path_str(def_id)
)
resolve_lifetimes_trait_definition
Does lifetime resolution, but does not descend into trait items. This
should only be used for resolving lifetimes of on trait definitions,
and is used to avoid cycles. Importantly, resolve_lifetimes
still visits
the same lifetimes and is responsible for diagnostics.
See `rustc_resolve::late::lifetimes for details.
resolve_lifetimes
Does lifetime resolution on items. Importantly, we can’t resolve lifetimes directly on things like trait methods, because of trait params. See `rustc_resolve::late::lifetimes for details.
named_region_map
[query description - consider adding a doc-comment!] looking up a named region
is_late_bound_map
[query description - consider adding a doc-comment!] testing if a region is late bound
object_lifetime_default
For a given item’s generic parameter, gets the default lifetimes to be used
for each parameter if a trait object were to be passed for that parameter.
For example, for T
in struct Foo<'a, T>
, this would be 'static
.
For T
in struct Foo<'a, T: 'a>
, this would instead be 'a
.
This query will panic if passed something that is not a type parameter.
late_bound_vars_map
[query description - consider adding a doc-comment!] looking up late bound vars
visibility
Computes the visibility of the provided def_id
.
If the item from the def_id
doesn’t have a visibility, it will panic. For example
a generic type parameter will panic if you call this method on it:
pub trait Foo<T: Debug> {}
In here, if you call visibility
on T
, it’ll panic.
type_uninhabited_from
Computes the set of modules from which this type is visibly uninhabited. To check whether a type is uninhabited at all (not just from a given module), you could check whether the forest is empty.
dep_kind
[query description - consider adding a doc-comment!] fetching what a dependency looks like
crate_name
Gets the name of the crate.
module_children
[query description - consider adding a doc-comment!] collecting child items of module tcx.def_path_str(def_id)
extern_mod_stmt_cnum
[query description - consider adding a doc-comment!] computing crate imported by tcx.def_path_str(def_id.to_def_id())
lib_features
[query description - consider adding a doc-comment!] calculating the lib features map
defined_lib_features
[query description - consider adding a doc-comment!] calculating the lib features defined in a crate
stability_implications
[query description - consider adding a doc-comment!] calculating the implications between #[unstable]
features defined in a crate
is_intrinsic
Whether the function is an intrinsic
get_lang_items
Returns the lang items defined in another crate by loading it from metadata.
all_diagnostic_items
Returns all diagnostic items defined in all crates.
defined_lang_items
Returns the lang items defined in another crate by loading it from metadata.
diagnostic_items
Returns the diagnostic items defined in a crate.
missing_lang_items
[query description - consider adding a doc-comment!] calculating the missing lang items in a crate
visible_parent_map
[query description - consider adding a doc-comment!] calculating the visible parent map
trimmed_def_paths
[query description - consider adding a doc-comment!] calculating trimmed def paths
missing_extern_crate_item
[query description - consider adding a doc-comment!] seeing if we’re missing an extern crate
item for this crate
used_crate_source
[query description - consider adding a doc-comment!] looking at the source for a crate
debugger_visualizers
Returns the debugger visualizers defined for this crate.
postorder_cnums
[query description - consider adding a doc-comment!] generating a postorder list of CrateNums
is_private_dep
Returns whether or not the crate with CrateNum ‘cnum’ is marked as a private dependency
allocator_kind
[query description - consider adding a doc-comment!] allocator kind for the current crate
upvars_mentioned
[query description - consider adding a doc-comment!] collecting upvars mentioned in tcx.def_path_str(def_id)
maybe_unused_trait_imports
[query description - consider adding a doc-comment!] fetching potentially unused trait imports
maybe_unused_extern_crates
[query description - consider adding a doc-comment!] looking up all possibly unused extern crates
names_imported_by_glob_use
[query description - consider adding a doc-comment!] names_imported_by_glob_use for tcx.def_path_str(def_id.to_def_id())
stability_index
[query description - consider adding a doc-comment!] calculating the stability index for the local crate
crates
[query description - consider adding a doc-comment!] fetching all foreign CrateNum instances
traits_in_crate
A list of all traits in a crate, used by rustdoc and error reporting.
NOTE: Not named just traits
due to a naming conflict.
exported_symbols
The list of symbols exported from the given crate.
- All names contained in
exported_symbols(cnum)
are guaranteed to correspond to a publicly visible symbol incnum
machine code. - The
exported_symbols
sets of different crates do not intersect.
collect_and_partition_mono_items
[query description - consider adding a doc-comment!] collect_and_partition_mono_items
is_codegened_item
[query description - consider adding a doc-comment!] determining whether tcx.def_path_str(def_id)
needs codegen
codegened_and_inlined_items
All items participating in code generation together with items inlined into them.
codegen_unit
[query description - consider adding a doc-comment!] codegen_unit
unused_generic_params
[query description - consider adding a doc-comment!] determining which generic parameters are unused by tcx.def_path_str(key.def_id())
backend_optimization_level
[query description - consider adding a doc-comment!] optimization level used by backend
output_filenames
Return the filenames where output artefacts shall be stored.
This query returns an &Arc
because codegen backends need the value even after the TyCtxt
has been destroyed.
normalize_projection_ty
Do not call this query directly: invoke normalize
instead.
try_normalize_generic_arg_after_erasing_regions
Do not call this query directly: invoke try_normalize_erasing_regions
instead.
try_normalize_mir_const_after_erasing_regions
Do not call this query directly: invoke try_normalize_erasing_regions
instead.
implied_outlives_bounds
[query description - consider adding a doc-comment!] computing implied outlives bounds for {:?}
dropck_outlives
Do not call this query directly:
invoke DropckOutlives::new(dropped_ty)).fully_perform(typeck.infcx)
instead.
evaluate_obligation
Do not call this query directly: invoke infcx.predicate_may_hold()
or
infcx.predicate_must_hold()
instead.
evaluate_goal
[query description - consider adding a doc-comment!] evaluating trait selection obligation goal.value
type_op_ascribe_user_type
Do not call this query directly: part of the Eq
type-op
type_op_eq
Do not call this query directly: part of the Eq
type-op
type_op_subtype
Do not call this query directly: part of the Subtype
type-op
type_op_prove_predicate
Do not call this query directly: part of the ProvePredicate
type-op
type_op_normalize_ty
Do not call this query directly: part of the Normalize
type-op
type_op_normalize_predicate
Do not call this query directly: part of the Normalize
type-op
type_op_normalize_poly_fn_sig
Do not call this query directly: part of the Normalize
type-op
type_op_normalize_fn_sig
Do not call this query directly: part of the Normalize
type-op
subst_and_check_impossible_predicates
[query description - consider adding a doc-comment!] impossible substituted predicates: tcx.def_path_str(key.0)
is_impossible_method
[query description - consider adding a doc-comment!] checking if tcx.def_path_str(key.1)
is impossible to call within tcx.def_path_str(key.0)
method_autoderef_steps
[query description - consider adding a doc-comment!] computing autoderef types for {:?}
supported_target_features
[query description - consider adding a doc-comment!] looking up supported target features
instance_def_size_estimate
Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
features_query
[query description - consider adding a doc-comment!] looking up enabled feature gates
resolve_instance
Attempt to resolve the given DefId
to an Instance
, for the
given generics args (SubstsRef
), returning one of:
Ok(Some(instance))
on successOk(None)
when theSubstsRef
are still too generic, and therefore don’t allow finding the finalInstance
Err(ErrorGuaranteed)
when theInstance
resolution process couldn’t complete due to errors elsewhere - this is distinct fromOk(None)
to avoid misleading diagnostics when an error has already been/will be emitted, for the original cause
resolve_instance_of_const_arg
[query description - consider adding a doc-comment!] resolving instance of the const argument ty :: Instance :: new(key.value.0.to_def_id(), key.value.2)
normalize_opaque_types
[query description - consider adding a doc-comment!] normalizing opaque types in {:?}
conservative_is_privately_uninhabited
Checks whether a type is definitely uninhabited. This is
conservative: for some types that are uninhabited we return false
,
but we only return true
for types that are definitely uninhabited.
ty.conservative_is_privately_uninhabited
implies that any value of type ty
will be Abi::Uninhabited
. (Note that uninhabited types may have nonzero
size, to account for partial initialisation. See #49298 for details.)
limits
[query description - consider adding a doc-comment!] looking up limits
diagnostic_hir_wf_check
Performs an HIR-based well-formed check on the item with the given HirId
. If
we get an Unimplemented
error that matches the provided Predicate
, return
the cause of the newly created obligation.
This is only used by error-reporting code to get a better cause (in particular, a better
span) for an existing error. Therefore, it is best-effort, and may never handle
all of the cases that the normal ty::Ty
-based wfcheck does. This is fine,
because the ty::Ty
-based wfcheck is always run.
global_backend_features
The list of backend features computed from CLI flags (-Ctarget-cpu
, -Ctarget-feature
,
--target
and similar).
generator_diagnostic_data
[query description - consider adding a doc-comment!] looking up generator diagnostic data of tcx.def_path_str(key)
permits_uninit_init
[query description - consider adding a doc-comment!] checking to see if {:?} permits being left uninit
permits_zero_init
[query description - consider adding a doc-comment!] checking to see if {:?} permits being left zeroed
Implementations
sourceimpl DepKind
impl DepKind
pub fn fingerprint_style(self, tcx: TyCtxt<'_>) -> FingerprintStyle
Trait Implementations
sourceimpl DepKind for DepKind
impl DepKind for DepKind
sourcefn debug_node(node: &DepNode, f: &mut Formatter<'_>) -> Result
fn debug_node(node: &DepNode, f: &mut Formatter<'_>) -> Result
std::fmt::Debug
for DepNode
.sourcefn with_deps<OP, R>(task_deps: TaskDepsRef<'_>, op: OP) -> Rwhere
OP: FnOnce() -> R,
fn with_deps<OP, R>(task_deps: TaskDepsRef<'_>, op: OP) -> Rwhere
OP: FnOnce() -> R,
sourcefn read_deps<OP>(op: OP)where
OP: for<'a> FnOnce(TaskDepsRef<'a>),
fn read_deps<OP>(op: OP)where
OP: for<'a> FnOnce(TaskDepsRef<'a>),
impl Copy for DepKind
impl Eq for DepKind
impl StructuralEq for DepKind
impl StructuralPartialEq for DepKind
Auto Trait Implementations
impl RefUnwindSafe for DepKind
impl Send for DepKind
impl Sync for DepKind
impl Unpin for DepKind
impl UnwindSafe for DepKind
Blanket Implementations
sourceimpl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
sourceimpl<T, R> InternIteratorElement<T, R> for T
impl<T, R> InternIteratorElement<T, R> for T
type Output = R
fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,
sourceimpl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
sourceimpl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,
impl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,
default fn from_cycle_error(tcx: CTX) -> T
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 2 bytes
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