Struct CheckAttrVisitor

struct CheckAttrVisitor<'tcx> {
    tcx: TyCtxt<'tcx>,
    abort: Cell<bool>,
}

Fields

tcx: TyCtxt<'tcx>

abort: Cell<bool>

Implementations

impl<'tcx> CheckAttrVisitor<'tcx>

fn dcx(&self) -> DiagCtxtHandle<'tcx>

fn check_attributes( &self, hir_id: HirId, span: Span, target: Target, item: Option<ItemLike<'_>>, )

Checks any attribute.

fn inline_attr_str_error_with_macro_def( &self, hir_id: HirId, attr: &Attribute, sym: &str, )

fn inline_attr_str_error_without_macro_def( &self, hir_id: HirId, attr: &Attribute, sym: &str, )

fn check_do_not_recommend(&self, attr_span: Span, hir_id: HirId, target: Target)

Checks if #[diagnostic::do_not_recommend] is applied on a trait impl.

fn check_diagnostic_on_unimplemented( &self, attr_span: Span, hir_id: HirId, target: Target, )

Checks if #[diagnostic::on_unimplemented] is applied to a trait definition

fn check_inline( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if an #[inline] is applied to a function or a closure.

fn check_coverage(&self, attr: &Attribute, span: Span, target: Target)

Checks that #[coverage(..)] is applied to a function/closure/method, or to an impl block or module.

fn check_optimize( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks that #[optimize(..)] is applied to a function/closure/method, or to an impl block or module.

fn check_generic_attr( &self, hir_id: HirId, attr: &Attribute, target: Target, allowed_target: Target, )

fn check_naked( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, attrs: &[Attribute], )

Checks if #[naked] is applied to a function definition.

fn check_object_lifetime_default(&self, hir_id: HirId)

Debugging aid for object_lifetime_default query.

fn check_collapse_debuginfo(&self, attr: &Attribute, span: Span, target: Target)

Checks if #[collapse_debuginfo] is applied to a macro.

fn check_track_caller( &self, hir_id: HirId, attr_span: Span, attrs: &[Attribute], span: Span, target: Target, )

Checks if a #[track_caller] is applied to a function.

fn check_non_exhaustive( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if the #[non_exhaustive] attribute on an item is valid.

fn check_marker( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if the #[marker] attribute on an item is valid.

fn check_target_feature( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, attrs: &[Attribute], )

Checks if the #[target_feature] attribute on item is valid.

fn check_thread_local(&self, attr: &Attribute, span: Span, target: Target)

Checks if the #[thread_local] attribute on item is valid.

fn doc_attr_str_error(&self, meta: &MetaItemInner, attr_name: &str)

fn check_doc_alias_value( &self, meta: &MetaItemInner, doc_alias: Symbol, hir_id: HirId, target: Target, is_list: bool, aliases: &mut FxHashMap<String, Span>, )

fn check_doc_alias( &self, meta: &MetaItemInner, hir_id: HirId, target: Target, aliases: &mut FxHashMap<String, Span>, )

fn check_doc_keyword(&self, meta: &MetaItemInner, hir_id: HirId)

fn check_doc_fake_variadic(&self, meta: &MetaItemInner, hir_id: HirId)

fn check_doc_search_unbox(&self, meta: &MetaItemInner, hir_id: HirId)

fn check_doc_inline( &self, attr: &Attribute, meta: &MetaItemInner, hir_id: HirId, target: Target, specified_inline: &mut Option<(bool, Span)>, )

Checks #[doc(inline)]/#[doc(no_inline)] attributes.

A doc inlining attribute is invalid if it is applied to a non-use item, or if there are conflicting attributes for one item.

specified_inline is used to keep track of whether we have already seen an inlining attribute for this item. If so, specified_inline holds the value and the span of the first inline/no_inline attribute.

fn check_doc_masked( &self, attr: &Attribute, meta: &MetaItemInner, hir_id: HirId, target: Target, )

fn check_attr_not_crate_level( &self, meta: &MetaItemInner, hir_id: HirId, attr_name: &str, ) -> bool

Checks that an attribute is not used at the crate level. Returns true if valid.

fn check_attr_crate_level( &self, attr: &Attribute, meta: &MetaItemInner, hir_id: HirId, ) -> bool

Checks that an attribute is used at the crate level. Returns true if valid.

fn check_test_attr(&self, meta: &MetaItemInner, hir_id: HirId)

Checks that doc(test(...)) attribute contains only valid attributes. Returns true if valid.

fn check_doc_cfg_hide(&self, meta: &MetaItemInner, hir_id: HirId)

Check that the #![doc(cfg_hide(...))] attribute only contains a list of attributes.

fn check_doc_attrs( &self, attr: &Attribute, hir_id: HirId, target: Target, specified_inline: &mut Option<(bool, Span)>, aliases: &mut FxHashMap<String, Span>, )

Runs various checks on #[doc] attributes.

specified_inline should be initialized to None and kept for the scope of one item. Read the documentation of check_doc_inline for more information.

fn check_pass_by_value(&self, attr: &Attribute, span: Span, target: Target)

Warns against some misuses of #[pass_by_value]

fn check_allow_incoherent_impl( &self, attr: &Attribute, span: Span, target: Target, )

fn check_has_incoherent_inherent_impls( &self, attr: &Attribute, span: Span, target: Target, )

fn check_ffi_pure(&self, attr_span: Span, attrs: &[Attribute], target: Target)

fn check_ffi_const(&self, attr_span: Span, target: Target)

fn check_must_use(&self, hir_id: HirId, attr: &Attribute, target: Target)

Warns against some misuses of #[must_use]

fn check_must_not_suspend(&self, attr: &Attribute, span: Span, target: Target)

Checks if #[must_not_suspend] is applied to a struct, enum, union, or trait.

fn check_may_dangle(&self, hir_id: HirId, attr: &Attribute)

Checks if #[may_dangle] is applied to a lifetime or type generic parameter in Drop impl.

fn check_cold( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[cold] is applied to a non-function.

fn check_link( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[link] is applied to an item other than a foreign module.

fn check_link_name( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[link_name] is applied to an item other than a foreign function or static.

fn check_no_link( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[no_link] is applied to an extern crate.

fn is_impl_item(&self, hir_id: HirId) -> bool

fn check_export_name( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[export_name] is applied to a function or static.

fn check_rustc_layout_scalar_valid_range( &self, attr: &Attribute, span: Span, target: Target, )

fn check_rustc_legacy_const_generics( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, item: Option<ItemLike<'_>>, )

Checks if #[rustc_legacy_const_generics] is applied to a function and has a valid argument.

fn check_applied_to_fn_or_method( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Helper function for checking that the provided attribute is only applied to a function or method.

fn check_rustc_lint_opt_ty(&self, attr: &Attribute, span: Span, target: Target)

Checks that the #[rustc_lint_opt_ty] attribute is only applied to a struct.

fn check_rustc_lint_opt_deny_field_access( &self, attr: &Attribute, span: Span, target: Target, )

Checks that the #[rustc_lint_opt_deny_field_access] attribute is only applied to a field.

fn check_rustc_dirty_clean(&self, attr: &Attribute)

Checks that the dep-graph debugging attributes are only present when the query-dep-graph option is passed to the compiler.

fn check_must_be_applied_to_trait( &self, attr: &Attribute, span: Span, target: Target, )

Checks if the attribute is applied to a trait.

fn check_link_section( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[link_section] is applied to a function or static.

fn check_no_mangle( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Checks if #[no_mangle] is applied to a function or static.

fn check_repr( &self, attrs: &[Attribute], span: Span, target: Target, item: Option<ItemLike<'_>>, hir_id: HirId, )

Checks if the #[repr] attributes on item are valid.

fn check_align_value(&self, item: &MetaItemInner)

fn check_used(&self, attrs: &[Attribute], target: Target, target_span: Span)

fn check_allow_internal_unstable( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, attrs: &[Attribute], )

Outputs an error for #[allow_internal_unstable] which can only be applied to macros. (Allows proc_macro functions)

fn check_debugger_visualizer(&self, attr: &Attribute, target: Target)

Checks if the items on the #[debugger_visualizer] attribute are valid.

fn check_rustc_allow_const_fn_unstable( &self, hir_id: HirId, attr: &Attribute, span: Span, target: Target, )

Outputs an error for #[allow_internal_unstable] which can only be applied to macros. (Allows proc_macro functions)

fn check_rustc_std_internal_symbol( &self, attr: &Attribute, span: Span, target: Target, )

fn check_stability_promotable(&self, attr: &Attribute, target: Target)

fn check_link_ordinal(&self, attr: &Attribute, _span: Span, target: Target)

fn check_confusables(&self, attr: &Attribute, target: Target)

fn check_deprecated( &self, hir_id: HirId, attr: &Attribute, _span: Span, target: Target, )

fn check_macro_use(&self, hir_id: HirId, attr: &Attribute, target: Target)

fn check_macro_export(&self, hir_id: HirId, attr: &Attribute, target: Target)

fn check_unused_attribute(&self, hir_id: HirId, attr: &Attribute)

fn check_proc_macro(&self, hir_id: HirId, target: Target, kind: ProcMacroKind)

A best effort attempt to create an error for a mismatching proc macro signature.

If this best effort goes wrong, it will just emit a worse error later (see #102923)

fn check_coroutine(&self, attr: &Attribute, target: Target)

fn check_linkage(&self, attr: &Attribute, span: Span, target: Target)

fn check_rustc_pub_transparent( &self, attr_span: Span, span: Span, attrs: &[Attribute], )

fn check_autodiff( &self, _hir_id: HirId, _attr: &Attribute, span: Span, target: Target, )

Checks if #[autodiff] is applied to an item other than a function item.

Trait Implementations

impl<'tcx> Visitor<'tcx> for CheckAttrVisitor<'tcx>

type NestedFilter = OnlyBodies

Override this type to control which nested HIR are visited; see [NestedFilter] for details. If you override this type, you must also override nested_visit_map.

fn nested_visit_map(&mut self) -> Self::Map

If type NestedFilter is set to visit nested items, this method must also be overridden to provide a map to retrieve nested items.

fn visit_item(&mut self, item: &'tcx Item<'tcx>)

Visits the top-level item and (optionally) nested items / impl items. See visit_nested_item for details.

fn visit_generic_param(&mut self, generic_param: &'tcx GenericParam<'tcx>)

fn visit_trait_item(&mut self, trait_item: &'tcx TraitItem<'tcx>)

fn visit_field_def(&mut self, struct_field: &'tcx FieldDef<'tcx>)

fn visit_arm(&mut self, arm: &'tcx Arm<'tcx>)

fn visit_foreign_item(&mut self, f_item: &'tcx ForeignItem<'tcx>)

fn visit_impl_item(&mut self, impl_item: &'tcx ImplItem<'tcx>)

fn visit_stmt(&mut self, stmt: &'tcx Stmt<'tcx>)

fn visit_expr(&mut self, expr: &'tcx Expr<'tcx>)

fn visit_expr_field(&mut self, field: &'tcx ExprField<'tcx>)

fn visit_variant(&mut self, variant: &'tcx Variant<'tcx>)

fn visit_param(&mut self, param: &'tcx Param<'tcx>)

fn visit_pat_field(&mut self, field: &'tcx PatField<'tcx>)

type Map = <Self::NestedFilter as NestedFilter<'v>>::Map

type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.

fn visit_nested_item(&mut self, id: ItemId) -> Self::Result

Invoked when a nested item is encountered. By default, when Self::NestedFilter is nested_filter::None, this method does nothing. You probably don’t want to override this method – instead, override [Self::NestedFilter] or use the “shallow” or “deep” visit patterns described at [rustc_hir::intravisit]. The only reason to override this method is if you want a nested pattern but cannot supply a [Map]; see nested_visit_map for advice.

fn visit_nested_trait_item(&mut self, id: TraitItemId) -> Self::Result

Like visit_nested_item(), but for trait items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_impl_item(&mut self, id: ImplItemId) -> Self::Result

Like visit_nested_item(), but for impl items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_foreign_item(&mut self, id: ForeignItemId) -> Self::Result

Like visit_nested_item(), but for foreign items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_body(&mut self, id: BodyId) -> Self::Result

Invoked to visit the body of a function, method or closure. Like visit_nested_item, does nothing by default unless you override Self::NestedFilter.

fn visit_body(&mut self, b: &Body<'v>) -> Self::Result

fn visit_id(&mut self, _hir_id: HirId) -> Self::Result

fn visit_name(&mut self, _name: Symbol) -> Self::Result

fn visit_ident(&mut self, ident: Ident) -> Self::Result

fn visit_mod(&mut self, m: &'v Mod<'v>, _s: Span, n: HirId) -> Self::Result

fn visit_local(&mut self, l: &'v LetStmt<'v>) -> Self::Result

fn visit_block(&mut self, b: &'v Block<'v>) -> Self::Result

fn visit_pat(&mut self, p: &'v Pat<'v>) -> Self::Result

fn visit_array_length(&mut self, len: &'v ArrayLen<'v>) -> Self::Result

fn visit_anon_const(&mut self, c: &'v AnonConst) -> Self::Result

fn visit_inline_const(&mut self, c: &'v ConstBlock) -> Self::Result

fn visit_const_arg(&mut self, c: &'v ConstArg<'v>) -> Self::Result

fn visit_ty(&mut self, t: &'v Ty<'v>) -> Self::Result

fn visit_pattern_type_pattern(&mut self, _p: &'v Pat<'v>)

fn visit_const_param_default( &mut self, _param: HirId, ct: &'v ConstArg<'v>, ) -> Self::Result

fn visit_generics(&mut self, g: &'v Generics<'v>) -> Self::Result

fn visit_where_predicate( &mut self, predicate: &'v WherePredicate<'v>, ) -> Self::Result

fn visit_fn_ret_ty(&mut self, ret_ty: &'v FnRetTy<'v>) -> Self::Result

fn visit_fn_decl(&mut self, fd: &'v FnDecl<'v>) -> Self::Result

fn visit_fn( &mut self, fk: FnKind<'v>, fd: &'v FnDecl<'v>, b: BodyId, _: Span, id: LocalDefId, ) -> Self::Result

fn visit_use( &mut self, path: &'v Path<'v, SmallVec<[Res; 3]>>, hir_id: HirId, ) -> Self::Result

fn visit_trait_item_ref(&mut self, ii: &'v TraitItemRef) -> Self::Result

fn visit_foreign_item_ref(&mut self, ii: &'v ForeignItemRef) -> Self::Result

fn visit_impl_item_ref(&mut self, ii: &'v ImplItemRef) -> Self::Result

fn visit_trait_ref(&mut self, t: &'v TraitRef<'v>) -> Self::Result

fn visit_param_bound(&mut self, bounds: &'v GenericBound<'v>) -> Self::Result

fn visit_precise_capturing_arg( &mut self, arg: &'v PreciseCapturingArg<'v>, ) -> Self::Result

fn visit_poly_trait_ref(&mut self, t: &'v PolyTraitRef<'v>) -> Self::Result

fn visit_opaque_ty(&mut self, opaque: &'v OpaqueTy<'v>) -> Self::Result

fn visit_variant_data(&mut self, s: &'v VariantData<'v>) -> Self::Result

fn visit_enum_def( &mut self, enum_definition: &'v EnumDef<'v>, item_id: HirId, ) -> Self::Result

fn visit_label(&mut self, label: &'v Label) -> Self::Result

fn visit_infer(&mut self, inf: &'v InferArg) -> Self::Result

fn visit_generic_arg(&mut self, generic_arg: &'v GenericArg<'v>) -> Self::Result

fn visit_lifetime(&mut self, lifetime: &'v Lifetime) -> Self::Result

fn visit_qpath( &mut self, qpath: &'v QPath<'v>, id: HirId, _span: Span, ) -> Self::Result

fn visit_path(&mut self, path: &Path<'v>, _id: HirId) -> Self::Result

fn visit_path_segment( &mut self, path_segment: &'v PathSegment<'v>, ) -> Self::Result

fn visit_generic_args( &mut self, generic_args: &'v GenericArgs<'v>, ) -> Self::Result

fn visit_assoc_item_constraint( &mut self, constraint: &'v AssocItemConstraint<'v>, ) -> Self::Result

fn visit_attribute(&mut self, _attr: &'v Attribute) -> Self::Result

fn visit_associated_item_kind( &mut self, kind: &'v AssocItemKind, ) -> Self::Result

fn visit_defaultness(&mut self, defaultness: &'v Defaultness) -> Self::Result

fn visit_inline_asm( &mut self, asm: &'v InlineAsm<'v>, id: HirId, ) -> Self::Result

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: 16 bytes