Struct rustc_passes::check_attr::CheckAttrVisitor

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

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§tcx: TyCtxt<'tcx>§abort: Cell<bool>

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impl<'tcx> CheckAttrVisitor<'tcx>

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

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

Checks any attribute.

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

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

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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.

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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

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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.

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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.

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

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

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

Checks that #[no_sanitize(..)] is applied to a function or method.

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

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

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

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

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

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fn check_object_lifetime_default(&self, hir_id: HirId)

Debugging aid for object_lifetime_default query.

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

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

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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.

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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.

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

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

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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.

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

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

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

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

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

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

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

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fn check_doc_inline( &self, attr: &Attribute, meta: &NestedMetaItem, 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.

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

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

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

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

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

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

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

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

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

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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.

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

Warns against some misuses of #[pass_by_value]

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

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

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

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

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

Warns against some misuses of #[must_use]

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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.

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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.

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

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

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

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

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

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

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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.

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

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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.

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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.

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

Checks that the #[rustc_lint_query_instability] attribute is only applied to a function or method.

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

Checks that the #[rustc_lint_diagnostics] attribute is only applied to a function or method.

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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.

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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.

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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.

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

Checks if the attribute is applied to a trait.

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

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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.

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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.

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

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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)

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

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

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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)

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

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

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

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

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

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

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

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

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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)

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

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

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

Trait Implementations§

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.
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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.
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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.
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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.
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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.
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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.
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fn visit_body(&mut self, b: &Body<'v>) -> Self::Result

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Auto Trait Implementations§

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impl<'tcx> !Freeze for CheckAttrVisitor<'tcx>

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impl<'tcx> !RefUnwindSafe for CheckAttrVisitor<'tcx>

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impl<'tcx> !Send for CheckAttrVisitor<'tcx>

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impl<'tcx> !Sync for CheckAttrVisitor<'tcx>

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impl<'tcx> Unpin for CheckAttrVisitor<'tcx>

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impl<'tcx> !UnwindSafe for CheckAttrVisitor<'tcx>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> Filterable for T

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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impl<I, T> UpcastFrom<I, T> for T

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fn upcast_from(from: T, _tcx: I) -> T

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T

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