[−][src]Trait syntax::visit::Visitor

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

    fn visit_ident(&mut self, 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_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>, 
        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_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, 
        _: 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_label(&mut self, label: &'ast Label) { ... }

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

    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_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_type_binding(&mut self, type_binding: &'ast TypeBinding) { ... }

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

    fn visit_tt(&mut self, tt: TokenTree) { ... }

    fn visit_tts(&mut self, tts: TokenStream) { ... }

    fn visit_token(&mut self, _t: Token) { ... }

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

    fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FunctionRetTy) { ... }

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

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, 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_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>, 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_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,
    _: 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_label(&mut self, label: &'ast Label)

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

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_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_type_binding(&mut self, type_binding: &'ast TypeBinding)

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

fn visit_tt(&mut self, tt: TokenTree)

fn visit_tts(&mut self, tts: TokenStream)

fn visit_token(&mut self, _t: Token)

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

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

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

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Implementors

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

fn visit_name(&mut self, _span: Span, _name: Name)[src]

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

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

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

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

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

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

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

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

fn visit_tt(&mut self, tt: TokenTree)[src]

fn visit_tts(&mut self, tts: TokenStream)[src]

fn visit_token(&mut self, _t: Token)[src]

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

fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FunctionRetTy)[src]

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

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