src/librustc_ast_passes/node_count.rs

   1 // Simply gives a rought count of the number of nodes in an AST.
   2
   3 use rustc_ast::ast::*;
   4 use rustc_ast::visit::*;
   5 use rustc_span::Span;
   6
   7 pub struct NodeCounter {
   8     pub count: usize,
   9 }
  10
  11 impl NodeCounter {
  12     pub fn new() -> NodeCounter {
  13         NodeCounter { count: 0 }
  14     }
  15 }
  16
  17 impl<'ast> Visitor<'ast> for NodeCounter {
  18     fn visit_ident(&mut self, ident: Ident) {
  19         self.count += 1;
  20         walk_ident(self, ident);
  21     }
  22     fn visit_mod(&mut self, m: &Mod, _s: Span, _a: &[Attribute], _n: NodeId) {
  23         self.count += 1;
  24         walk_mod(self, m)
  25     }
  26     fn visit_foreign_item(&mut self, i: &ForeignItem) {
  27         self.count += 1;
  28         walk_foreign_item(self, i)
  29     }
  30     fn visit_item(&mut self, i: &Item) {
  31         self.count += 1;
  32         walk_item(self, i)
  33     }
  34     fn visit_local(&mut self, l: &Local) {
  35         self.count += 1;
  36         walk_local(self, l)
  37     }
  38     fn visit_block(&mut self, b: &Block) {
  39         self.count += 1;
  40         walk_block(self, b)
  41     }
  42     fn visit_stmt(&mut self, s: &Stmt) {
  43         self.count += 1;
  44         walk_stmt(self, s)
  45     }
  46     fn visit_arm(&mut self, a: &Arm) {
  47         self.count += 1;
  48         walk_arm(self, a)
  49     }
  50     fn visit_pat(&mut self, p: &Pat) {
  51         self.count += 1;
  52         walk_pat(self, p)
  53     }
  54     fn visit_expr(&mut self, ex: &Expr) {
  55         self.count += 1;
  56         walk_expr(self, ex)
  57     }
  58     fn visit_ty(&mut self, t: &Ty) {
  59         self.count += 1;
  60         walk_ty(self, t)
  61     }
  62     fn visit_generic_param(&mut self, param: &GenericParam) {
  63         self.count += 1;
  64         walk_generic_param(self, param)
  65     }
  66     fn visit_generics(&mut self, g: &Generics) {
  67         self.count += 1;
  68         walk_generics(self, g)
  69     }
  70     fn visit_fn(&mut self, fk: FnKind<'_>, s: Span, _: NodeId) {
  71         self.count += 1;
  72         walk_fn(self, fk, s)
  73     }
  74     fn visit_assoc_item(&mut self, ti: &AssocItem, ctxt: AssocCtxt) {
  75         self.count += 1;
  76         walk_assoc_item(self, ti, ctxt);
  77     }
  78     fn visit_trait_ref(&mut self, t: &TraitRef) {
  79         self.count += 1;
  80         walk_trait_ref(self, t)
  81     }
  82     fn visit_param_bound(&mut self, bounds: &GenericBound) {
  83         self.count += 1;
  84         walk_param_bound(self, bounds)
  85     }
  86     fn visit_poly_trait_ref(&mut self, t: &PolyTraitRef, m: &TraitBoundModifier) {
  87         self.count += 1;
  88         walk_poly_trait_ref(self, t, m)
  89     }
  90     fn visit_variant_data(&mut self, s: &VariantData) {
  91         self.count += 1;
  92         walk_struct_def(self, s)
  93     }
  94     fn visit_struct_field(&mut self, s: &StructField) {
  95         self.count += 1;
  96         walk_struct_field(self, s)
  97     }
  98     fn visit_enum_def(
  99         &mut self,
 100         enum_definition: &EnumDef,
 101         generics: &Generics,
 102         item_id: NodeId,
 103         _: Span,
 104     ) {
 105         self.count += 1;
 106         walk_enum_def(self, enum_definition, generics, item_id)
 107     }
 108     fn visit_variant(&mut self, v: &Variant) {
 109         self.count += 1;
 110         walk_variant(self, v)
 111     }
 112     fn visit_lifetime(&mut self, lifetime: &Lifetime) {
 113         self.count += 1;
 114         walk_lifetime(self, lifetime)
 115     }
 116     fn visit_mac(&mut self, _mac: &MacCall) {
 117         self.count += 1;
 118         walk_mac(self, _mac)
 119     }
 120     fn visit_path(&mut self, path: &Path, _id: NodeId) {
 121         self.count += 1;
 122         walk_path(self, path)
 123     }
 124     fn visit_use_tree(&mut self, use_tree: &UseTree, id: NodeId, _nested: bool) {
 125         self.count += 1;
 126         walk_use_tree(self, use_tree, id)
 127     }
 128     fn visit_generic_args(&mut self, path_span: Span, generic_args: &GenericArgs) {
 129         self.count += 1;
 130         walk_generic_args(self, path_span, generic_args)
 131     }
 132     fn visit_assoc_ty_constraint(&mut self, constraint: &AssocTyConstraint) {
 133         self.count += 1;
 134         walk_assoc_ty_constraint(self, constraint)
 135     }
 136     fn visit_attribute(&mut self, _attr: &Attribute) {
 137         self.count += 1;
 138     }
 139 }