Trait rustc_ast::visit::Visitor

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pub trait Visitor<'ast>: Sized {
Show 48 methods // Provided methods fn visit_ident(&mut self, _ident: Ident) { ... } fn visit_foreign_item(&mut self, i: &'ast ForeignItem) { ... } fn visit_item(&mut self, i: &'ast Item) { ... } fn visit_local(&mut self, l: &'ast Local) { ... } fn visit_block(&mut self, b: &'ast Block) { ... } fn visit_stmt(&mut self, s: &'ast Stmt) { ... } fn visit_param(&mut self, param: &'ast Param) { ... } fn visit_arm(&mut self, a: &'ast Arm) { ... } fn visit_pat(&mut self, p: &'ast Pat) { ... } fn visit_anon_const(&mut self, c: &'ast AnonConst) { ... } fn visit_expr(&mut self, ex: &'ast Expr) { ... } fn visit_method_receiver_expr(&mut self, ex: &'ast Expr) { ... } fn visit_expr_post(&mut self, _ex: &'ast Expr) { ... } fn visit_ty(&mut self, t: &'ast Ty) { ... } fn visit_generic_param(&mut self, param: &'ast GenericParam) { ... } fn visit_generics(&mut self, g: &'ast Generics) { ... } fn visit_closure_binder(&mut self, b: &'ast ClosureBinder) { ... } fn visit_where_predicate(&mut self, p: &'ast WherePredicate) { ... } fn visit_fn(&mut self, fk: FnKind<'ast>, _: Span, _: NodeId) { ... } fn visit_assoc_item(&mut self, i: &'ast AssocItem, ctxt: AssocCtxt) { ... } fn visit_trait_ref(&mut self, t: &'ast TraitRef) { ... } fn visit_param_bound( &mut self, bounds: &'ast GenericBound, _ctxt: BoundKind ) { ... } fn visit_poly_trait_ref(&mut self, t: &'ast PolyTraitRef) { ... } fn visit_variant_data(&mut self, s: &'ast VariantData) { ... } fn visit_field_def(&mut self, s: &'ast FieldDef) { ... } fn visit_enum_def(&mut self, enum_definition: &'ast EnumDef) { ... } fn visit_variant(&mut self, v: &'ast Variant) { ... } fn visit_variant_discr(&mut self, discr: &'ast AnonConst) { ... } fn visit_label(&mut self, label: &'ast Label) { ... } fn visit_lifetime(&mut self, lifetime: &'ast Lifetime, _: LifetimeCtxt) { ... } fn visit_mac_call(&mut self, mac: &'ast MacCall) { ... } fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId) { ... } fn visit_path(&mut self, path: &'ast Path, _id: NodeId) { ... } fn visit_use_tree( &mut self, use_tree: &'ast UseTree, id: NodeId, _nested: bool ) { ... } fn visit_path_segment(&mut self, path_segment: &'ast PathSegment) { ... } fn visit_generic_args(&mut self, generic_args: &'ast GenericArgs) { ... } fn visit_generic_arg(&mut self, generic_arg: &'ast GenericArg) { ... } fn visit_assoc_constraint(&mut self, constraint: &'ast AssocConstraint) { ... } fn visit_attribute(&mut self, attr: &'ast Attribute) { ... } fn visit_vis(&mut self, vis: &'ast Visibility) { ... } fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FnRetTy) { ... } fn visit_fn_header(&mut self, _header: &'ast FnHeader) { ... } fn visit_expr_field(&mut self, f: &'ast ExprField) { ... } fn visit_pat_field(&mut self, fp: &'ast PatField) { ... } fn visit_crate(&mut self, krate: &'ast Crate) { ... } fn visit_inline_asm(&mut self, asm: &'ast InlineAsm) { ... } fn visit_format_args(&mut self, fmt: &'ast FormatArgs) { ... } fn visit_inline_asm_sym(&mut self, sym: &'ast InlineAsmSym) { ... }
}
Expand description

Each method of the Visitor trait is a hook to be potentially overridden. Each method’s default implementation recursively visits the substructure of the input via the corresponding walk method; e.g., the visit_item method by default calls visit::walk_item.

If you want to ensure that your code handles every variant explicitly, you need to override each method. (And you also need to monitor future changes to Visitor in case a new method with a new default implementation gets introduced.)

Provided Methods§

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fn visit_ident(&mut self, _ident: Ident)

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fn visit_foreign_item(&mut self, i: &'ast ForeignItem)

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fn visit_item(&mut self, i: &'ast Item)

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fn visit_local(&mut self, l: &'ast Local)

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fn visit_block(&mut self, b: &'ast Block)

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fn visit_stmt(&mut self, s: &'ast Stmt)

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fn visit_param(&mut self, param: &'ast Param)

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fn visit_arm(&mut self, a: &'ast Arm)

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fn visit_pat(&mut self, p: &'ast Pat)

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fn visit_anon_const(&mut self, c: &'ast AnonConst)

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fn visit_expr(&mut self, ex: &'ast Expr)

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fn visit_method_receiver_expr(&mut self, ex: &'ast Expr)

This method is a hack to workaround unstable of stmt_expr_attributes. It can be removed once that feature is stabilized.

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fn visit_expr_post(&mut self, _ex: &'ast Expr)

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fn visit_ty(&mut self, t: &'ast Ty)

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fn visit_generic_param(&mut self, param: &'ast GenericParam)

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fn visit_generics(&mut self, g: &'ast Generics)

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fn visit_closure_binder(&mut self, b: &'ast ClosureBinder)

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fn visit_where_predicate(&mut self, p: &'ast WherePredicate)

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fn visit_fn(&mut self, fk: FnKind<'ast>, _: Span, _: NodeId)

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fn visit_assoc_item(&mut self, i: &'ast AssocItem, ctxt: AssocCtxt)

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fn visit_trait_ref(&mut self, t: &'ast TraitRef)

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fn visit_param_bound(&mut self, bounds: &'ast GenericBound, _ctxt: BoundKind)

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fn visit_poly_trait_ref(&mut self, t: &'ast PolyTraitRef)

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fn visit_variant_data(&mut self, s: &'ast VariantData)

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fn visit_field_def(&mut self, s: &'ast FieldDef)

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fn visit_enum_def(&mut self, enum_definition: &'ast EnumDef)

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fn visit_variant(&mut self, v: &'ast Variant)

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fn visit_variant_discr(&mut self, discr: &'ast AnonConst)

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fn visit_label(&mut self, label: &'ast Label)

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fn visit_lifetime(&mut self, lifetime: &'ast Lifetime, _: LifetimeCtxt)

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fn visit_mac_call(&mut self, mac: &'ast MacCall)

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fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId)

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fn visit_path(&mut self, path: &'ast Path, _id: NodeId)

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fn visit_use_tree(&mut self, use_tree: &'ast UseTree, id: NodeId, _nested: bool)

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fn visit_path_segment(&mut self, path_segment: &'ast PathSegment)

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fn visit_generic_args(&mut self, generic_args: &'ast GenericArgs)

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fn visit_generic_arg(&mut self, generic_arg: &'ast GenericArg)

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fn visit_assoc_constraint(&mut self, constraint: &'ast AssocConstraint)

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fn visit_attribute(&mut self, attr: &'ast Attribute)

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fn visit_vis(&mut self, vis: &'ast Visibility)

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fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FnRetTy)

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fn visit_fn_header(&mut self, _header: &'ast FnHeader)

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fn visit_expr_field(&mut self, f: &'ast ExprField)

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fn visit_pat_field(&mut self, fp: &'ast PatField)

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fn visit_crate(&mut self, krate: &'ast Crate)

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fn visit_inline_asm(&mut self, asm: &'ast InlineAsm)

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fn visit_format_args(&mut self, fmt: &'ast FormatArgs)

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fn visit_inline_asm_sym(&mut self, sym: &'ast InlineAsmSym)

Implementors§