[−][src]Trait syntex_syntax2::visit::Visitor

pub trait Visitor<'ast>: Sized {
    fn visit_name(&mut self, _span: Span, _name: Name) { ... }

    fn visit_ident(&mut self, span: Span, ident: Ident) { ... }

    fn visit_mod(
        &mut self, 
        m: &'ast Mod, 
        _s: Span, 
        _attrs: &[Attribute], 
        _n: NodeId
    ) { ... }

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

    fn visit_global_asm(&mut self, ga: &'ast GlobalAsm) { ... }

    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_arm(&mut self, a: &'ast Arm) { ... }

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

    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_generics(&mut self, g: &'ast Generics) { ... }

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

    fn visit_fn(
        &mut self, 
        fk: FnKind<'ast>, 
        fd: &'ast FnDecl, 
        s: Span, 
        _: NodeId
    ) { ... }

    fn visit_trait_item(&mut self, ti: &'ast TraitItem) { ... }

    fn visit_impl_item(&mut self, ii: &'ast ImplItem) { ... }

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

    fn visit_ty_param_bound(&mut self, bounds: &'ast TyParamBound) { ... }

    fn visit_poly_trait_ref(
        &mut self, 
        t: &'ast PolyTraitRef, 
        m: &'ast TraitBoundModifier
    ) { ... }

    fn visit_variant_data(
        &mut self, 
        s: &'ast VariantData, 
        _: Ident, 
        _: &'ast Generics, 
        _: NodeId, 
        _: Span
    ) { ... }

    fn visit_struct_field(&mut self, s: &'ast StructField) { ... }

    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, 
        g: &'ast Generics, 
        item_id: NodeId
    ) { ... }

    fn visit_lifetime(&mut self, lifetime: &'ast Lifetime) { ... }

    fn visit_lifetime_def(&mut self, lifetime: &'ast LifetimeDef) { ... }

    fn visit_mac(&mut self, _mac: &'ast Mac) { ... }

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

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

    fn visit_path_list_item(
        &mut self, 
        prefix: &'ast Path, 
        item: &'ast PathListItem
    ) { ... }

    fn visit_path_segment(
        &mut self, 
        path_span: Span, 
        path_segment: &'ast PathSegment
    ) { ... }

    fn visit_path_parameters(
        &mut self, 
        path_span: Span, 
        path_parameters: &'ast PathParameters
    ) { ... }

    fn visit_assoc_type_binding(&mut self, type_binding: &'ast TypeBinding) { ... }

    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 FunctionRetTy) { ... }
}

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_mod method by default calls visit::walk_mod.

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_name(&mut self, _span: Span, _name: Name)

fn visit_ident(&mut self, span: Span, ident: Ident)

fn visit_mod(
    &mut self,
    m: &'ast Mod,
    _s: Span,
    _attrs: &[Attribute],
    _n: NodeId
)

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

fn visit_global_asm(&mut self, ga: &'ast GlobalAsm)

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_arm(&mut self, a: &'ast Arm)

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

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_generics(&mut self, g: &'ast Generics)

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

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

fn visit_trait_item(&mut self, ti: &'ast TraitItem)

fn visit_impl_item(&mut self, ii: &'ast ImplItem)

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

fn visit_ty_param_bound(&mut self, bounds: &'ast TyParamBound)

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

fn visit_variant_data(
    &mut self,
    s: &'ast VariantData,
    _: Ident,
    _: &'ast Generics,
    _: NodeId,
    _: Span
)

fn visit_struct_field(&mut self, s: &'ast StructField)

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,
    g: &'ast Generics,
    item_id: NodeId
)

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

fn visit_lifetime_def(&mut self, lifetime: &'ast LifetimeDef)

fn visit_mac(&mut self, _mac: &'ast Mac)

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

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

fn visit_path_list_item(&mut self, prefix: &'ast Path, item: &'ast PathListItem)

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

fn visit_path_parameters(
    &mut self,
    path_span: Span,
    path_parameters: &'ast PathParameters
)

fn visit_assoc_type_binding(&mut self, type_binding: &'ast TypeBinding)

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 FunctionRetTy)

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Implementors

impl<'ast> Visitor<'ast> for NodeCounter[src]

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