Trait rustc_ast::visit::Visitor[][src]

pub trait Visitor<'ast>: Sized {
Show 43 methods fn visit_name(&mut self, _span: Span, _name: Symbol) { ... }
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_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_where_predicate(&mut self, p: &'ast WherePredicate) { ... }
fn visit_fn(&mut self, fk: FnKind<'ast>, s: 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) { ... }
fn visit_poly_trait_ref(
        &mut self,
        t: &'ast PolyTraitRef,
        m: &'ast TraitBoundModifier
    ) { ... }
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,
        generics: &'ast Generics,
        item_id: NodeId,
        _: Span
    ) { ... }
fn visit_variant(&mut self, v: &'ast Variant) { ... }
fn visit_label(&mut self, label: &'ast Label) { ... }
fn visit_lifetime(&mut self, lifetime: &'ast Lifetime) { ... }
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_span: Span,
        path_segment: &'ast PathSegment
    ) { ... }
fn visit_generic_args(
        &mut self,
        path_span: Span,
        generic_args: &'ast GenericArgs
    ) { ... }
fn visit_generic_arg(&mut self, generic_arg: &'ast GenericArg) { ... }
fn visit_assoc_ty_constraint(&mut self, constraint: &'ast AssocTyConstraint) { ... }
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) { ... }
}
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

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

Implementors