diff --git a/gcc/rust/util/rust-attributes.cc b/gcc/rust/util/rust-attributes.cc
new file mode 100644
index 00000000000..bf4bb2fbfe9
--- /dev/null
+++ b/gcc/rust/util/rust-attributes.cc
@@ -0,0 +1,839 @@
+// Copyright (C) 2020-2022 Free Software Foundation, Inc.
+
+// This file is part of GCC.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with GCC; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include "rust-attributes.h"
+#include "rust-ast.h"
+#include "rust-ast-full.h"
+#include "rust-diagnostics.h"
+#include "safe-ctype.h"
+
+namespace Rust {
+namespace Analysis {
+
+// https://doc.rust-lang.org/stable/nightly-rustc/src/rustc_feature/builtin_attrs.rs.html#248
+static const BuiltinAttrDefinition __definitions[] = {
+  {"inline", CODE_GENERATION},
+  {"cold", CODE_GENERATION},
+  {"cfg", EXPANSION},
+  {"cfg_attr", EXPANSION},
+  {"deprecated", STATIC_ANALYSIS},
+  {"allow", STATIC_ANALYSIS},
+  {"doc", HIR_LOWERING},
+  {"must_use", STATIC_ANALYSIS},
+  {"lang", HIR_LOWERING},
+  {"link_section", CODE_GENERATION},
+  {"no_mangle", CODE_GENERATION},
+  {"repr", CODE_GENERATION},
+  {"path", EXPANSION},
+};
+
+BuiltinAttributeMappings *
+BuiltinAttributeMappings::get ()
+{
+  static BuiltinAttributeMappings *instance = nullptr;
+  if (instance == nullptr)
+    instance = new BuiltinAttributeMappings ();
+
+  return instance;
+}
+
+const BuiltinAttrDefinition &
+BuiltinAttributeMappings::lookup_builtin (const std::string &attr_name) const
+{
+  auto it = mappings.find (attr_name);
+  if (it == mappings.end ())
+    return BuiltinAttrDefinition::error_node ();
+
+  return it->second;
+}
+
+BuiltinAttributeMappings::BuiltinAttributeMappings ()
+{
+  size_t ndefinitions = sizeof (__definitions) / sizeof (BuiltinAttrDefinition);
+  for (size_t i = 0; i < ndefinitions; i++)
+    {
+      const BuiltinAttrDefinition &def = __definitions[i];
+      mappings.insert ({def.name, def});
+    }
+}
+
+AttributeChecker::AttributeChecker () {}
+
+void
+AttributeChecker::go (AST::Crate &crate)
+{
+  check_attributes (crate.get_inner_attrs ());
+
+  for (auto &item : crate.items)
+    item->accept_vis (*this);
+}
+
+static bool
+is_builtin (const AST::Attribute &attribute, BuiltinAttrDefinition &builtin)
+{
+  auto &segments = attribute.get_path ().get_segments ();
+
+  // Builtin attributes always have a single segment. This avoids us creating
+  // strings all over the place and performing a linear search in the builtins
+  // map
+  if (segments.size () != 1)
+    return false;
+
+  builtin = BuiltinAttributeMappings::get ()->lookup_builtin (
+    segments.at (0).get_segment_name ());
+
+  return !builtin.is_error ();
+}
+
+/**
+ * Check that the string given to #[doc(alias = ...)] or #[doc(alias(...))] is
+ * valid.
+ *
+ * This means no whitespace characters other than spaces and no quoting
+ * characters.
+ */
+static void
+check_doc_alias (const std::string &alias_input, const Location &locus)
+{
+  // FIXME: The locus here is for the whole attribute. Can we get the locus
+  // of the alias input instead?
+  for (auto c : alias_input)
+    if ((ISSPACE (c) && c != ' ') || c == '\'' || c == '\"')
+      {
+	auto to_print = std::string (1, c);
+	switch (c)
+	  {
+	  case '\n':
+	    to_print = "\\n";
+	    break;
+	  case '\t':
+	    to_print = "\\t";
+	    break;
+	  default:
+	    break;
+	  }
+	rust_error_at (locus,
+		       "invalid character used in %<#[doc(alias)]%> input: %qs",
+		       to_print.c_str ());
+      }
+
+  if (alias_input.empty ())
+    return;
+
+  if (alias_input.front () == ' ' || alias_input.back () == ' ')
+    rust_error_at (locus,
+		   "%<#[doc(alias)]%> input cannot start or end with a space");
+}
+
+static void
+check_doc_attribute (const AST::Attribute &attribute)
+{
+  if (!attribute.has_attr_input ())
+    {
+      rust_error_at (
+	attribute.get_locus (),
+	// FIXME: Improve error message here. Rustc has a very good one
+	"%<#[doc]%> cannot be an empty attribute");
+      return;
+    }
+
+  switch (attribute.get_attr_input ().get_attr_input_type ())
+    {
+    case AST::AttrInput::LITERAL:
+    case AST::AttrInput::META_ITEM:
+      break;
+      // FIXME: Handle them as well
+
+      case AST::AttrInput::TOKEN_TREE: {
+	// FIXME: This doesn't check for #[doc(alias(...))]
+	const auto &option = static_cast<const AST::DelimTokenTree &> (
+	  attribute.get_attr_input ());
+	auto *meta_item = option.parse_to_meta_item ();
+
+	for (auto &item : meta_item->get_items ())
+	  {
+	    if (item->is_key_value_pair ())
+	      {
+		auto name_value
+		  = static_cast<AST::MetaNameValueStr *> (item.get ())
+		      ->get_name_value_pair ();
+
+		// FIXME: Check for other stuff than #[doc(alias = ...)]
+		if (name_value.first == "alias")
+		  check_doc_alias (name_value.second, attribute.get_locus ());
+	      }
+	  }
+	break;
+      }
+    }
+}
+
+void
+AttributeChecker::check_attribute (const AST::Attribute &attribute)
+{
+  BuiltinAttrDefinition result;
+
+  // This checker does not check non-builtin attributes
+  if (!is_builtin (attribute, result))
+    return;
+
+  // TODO: Add checks here for each builtin attribute
+  // TODO: Have an enum of builtins as well, switching on strings is annoying
+  // and costly
+  if (result.name == "doc")
+    check_doc_attribute (attribute);
+}
+
+void
+AttributeChecker::check_attributes (const AST::AttrVec &attributes)
+{
+  for (auto &attr : attributes)
+    check_attribute (attr);
+}
+
+void
+AttributeChecker::visit (AST::Token &tok)
+{}
+
+void
+AttributeChecker::visit (AST::DelimTokenTree &delim_tok_tree)
+{}
+
+void
+AttributeChecker::visit (AST::AttrInputMetaItemContainer &input)
+{}
+
+void
+AttributeChecker::visit (AST::IdentifierExpr &ident_expr)
+{}
+
+void
+AttributeChecker::visit (AST::Lifetime &lifetime)
+{}
+
+void
+AttributeChecker::visit (AST::LifetimeParam &lifetime_param)
+{}
+
+void
+AttributeChecker::visit (AST::ConstGenericParam &const_param)
+{}
+
+// rust-path.h
+void
+AttributeChecker::visit (AST::PathInExpression &path)
+{}
+
+void
+AttributeChecker::visit (AST::TypePathSegment &segment)
+{}
+
+void
+AttributeChecker::visit (AST::TypePathSegmentGeneric &segment)
+{}
+
+void
+AttributeChecker::visit (AST::TypePathSegmentFunction &segment)
+{}
+
+void
+AttributeChecker::visit (AST::TypePath &path)
+{}
+
+void
+AttributeChecker::visit (AST::QualifiedPathInExpression &path)
+{}
+
+void
+AttributeChecker::visit (AST::QualifiedPathInType &path)
+{}
+
+// rust-expr.h
+void
+AttributeChecker::visit (AST::LiteralExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::AttrInputLiteral &attr_input)
+{}
+
+void
+AttributeChecker::visit (AST::MetaItemLitExpr &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::MetaItemPathLit &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::BorrowExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::DereferenceExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ErrorPropagationExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::NegationExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ArithmeticOrLogicalExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ComparisonExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::LazyBooleanExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::TypeCastExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::AssignmentExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::CompoundAssignmentExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::GroupedExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ArrayElemsValues &elems)
+{}
+
+void
+AttributeChecker::visit (AST::ArrayElemsCopied &elems)
+{}
+
+void
+AttributeChecker::visit (AST::ArrayExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ArrayIndexExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::TupleExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::TupleIndexExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::StructExprStruct &expr)
+{}
+
+void
+AttributeChecker::visit (AST::StructExprFieldIdentifier &field)
+{}
+
+void
+AttributeChecker::visit (AST::StructExprFieldIdentifierValue &field)
+{}
+
+void
+AttributeChecker::visit (AST::StructExprFieldIndexValue &field)
+{}
+
+void
+AttributeChecker::visit (AST::StructExprStructFields &expr)
+{}
+
+void
+AttributeChecker::visit (AST::StructExprStructBase &expr)
+{}
+
+void
+AttributeChecker::visit (AST::CallExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::MethodCallExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::FieldAccessExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ClosureExprInner &expr)
+{}
+
+void
+AttributeChecker::visit (AST::BlockExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ClosureExprInnerTyped &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ContinueExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::BreakExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::RangeFromToExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::RangeFromExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::RangeToExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::RangeFullExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::RangeFromToInclExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::RangeToInclExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ReturnExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::UnsafeBlockExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::LoopExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::WhileLoopExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::WhileLetLoopExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::ForLoopExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfExprConseqElse &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfExprConseqIf &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfExprConseqIfLet &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfLetExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfLetExprConseqElse &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfLetExprConseqIf &expr)
+{}
+
+void
+AttributeChecker::visit (AST::IfLetExprConseqIfLet &expr)
+{}
+
+void
+AttributeChecker::visit (AST::MatchExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::AwaitExpr &expr)
+{}
+
+void
+AttributeChecker::visit (AST::AsyncBlockExpr &expr)
+{}
+
+// rust-item.h
+void
+AttributeChecker::visit (AST::TypeParam &param)
+{}
+
+void
+AttributeChecker::visit (AST::LifetimeWhereClauseItem &item)
+{}
+
+void
+AttributeChecker::visit (AST::TypeBoundWhereClauseItem &item)
+{}
+
+void
+AttributeChecker::visit (AST::Method &method)
+{}
+
+void
+AttributeChecker::visit (AST::Module &module)
+{}
+
+void
+AttributeChecker::visit (AST::ExternCrate &crate)
+{}
+
+void
+AttributeChecker::visit (AST::UseTreeGlob &use_tree)
+{}
+
+void
+AttributeChecker::visit (AST::UseTreeList &use_tree)
+{}
+
+void
+AttributeChecker::visit (AST::UseTreeRebind &use_tree)
+{}
+
+void
+AttributeChecker::visit (AST::UseDeclaration &use_decl)
+{}
+
+void
+AttributeChecker::visit (AST::Function &function)
+{}
+
+void
+AttributeChecker::visit (AST::TypeAlias &type_alias)
+{}
+
+void
+AttributeChecker::visit (AST::StructStruct &struct_item)
+{
+  check_attributes (struct_item.get_outer_attrs ());
+}
+
+void
+AttributeChecker::visit (AST::TupleStruct &tuple_struct)
+{}
+
+void
+AttributeChecker::visit (AST::EnumItem &item)
+{}
+
+void
+AttributeChecker::visit (AST::EnumItemTuple &item)
+{}
+
+void
+AttributeChecker::visit (AST::EnumItemStruct &item)
+{}
+
+void
+AttributeChecker::visit (AST::EnumItemDiscriminant &item)
+{}
+
+void
+AttributeChecker::visit (AST::Enum &enum_item)
+{}
+
+void
+AttributeChecker::visit (AST::Union &union_item)
+{}
+
+void
+AttributeChecker::visit (AST::ConstantItem &const_item)
+{}
+
+void
+AttributeChecker::visit (AST::StaticItem &static_item)
+{}
+
+void
+AttributeChecker::visit (AST::TraitItemFunc &item)
+{}
+
+void
+AttributeChecker::visit (AST::TraitItemMethod &item)
+{}
+
+void
+AttributeChecker::visit (AST::TraitItemConst &item)
+{}
+
+void
+AttributeChecker::visit (AST::TraitItemType &item)
+{}
+
+void
+AttributeChecker::visit (AST::Trait &trait)
+{}
+
+void
+AttributeChecker::visit (AST::InherentImpl &impl)
+{}
+
+void
+AttributeChecker::visit (AST::TraitImpl &impl)
+{}
+
+void
+AttributeChecker::visit (AST::ExternalStaticItem &item)
+{}
+
+void
+AttributeChecker::visit (AST::ExternalFunctionItem &item)
+{}
+
+void
+AttributeChecker::visit (AST::ExternBlock &block)
+{}
+
+// rust-macro.h
+void
+AttributeChecker::visit (AST::MacroMatchFragment &match)
+{}
+
+void
+AttributeChecker::visit (AST::MacroMatchRepetition &match)
+{}
+
+void
+AttributeChecker::visit (AST::MacroMatcher &matcher)
+{}
+
+void
+AttributeChecker::visit (AST::MacroRulesDefinition &rules_def)
+{}
+
+void
+AttributeChecker::visit (AST::MacroInvocation &macro_invoc)
+{}
+
+void
+AttributeChecker::visit (AST::MetaItemPath &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::MetaItemSeq &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::MetaWord &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::MetaNameValueStr &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::MetaListPaths &meta_item)
+{}
+
+void
+AttributeChecker::visit (AST::MetaListNameValueStr &meta_item)
+{}
+
+// rust-pattern.h
+void
+AttributeChecker::visit (AST::LiteralPattern &pattern)
+{}
+
+void
+AttributeChecker::visit (AST::IdentifierPattern &pattern)
+{}
+
+void
+AttributeChecker::visit (AST::WildcardPattern &pattern)
+{}
+
+// void AttributeChecker::visit(RangePatternBound& bound){}
+
+void
+AttributeChecker::visit (AST::RangePatternBoundLiteral &bound)
+{}
+
+void
+AttributeChecker::visit (AST::RangePatternBoundPath &bound)
+{}
+
+void
+AttributeChecker::visit (AST::RangePatternBoundQualPath &bound)
+{}
+
+void
+AttributeChecker::visit (AST::RangePattern &pattern)
+{}
+
+void
+AttributeChecker::visit (AST::ReferencePattern &pattern)
+{}
+
+// void AttributeChecker::visit(StructPatternField& field){}
+
+void
+AttributeChecker::visit (AST::StructPatternFieldTuplePat &field)
+{}
+
+void
+AttributeChecker::visit (AST::StructPatternFieldIdentPat &field)
+{}
+
+void
+AttributeChecker::visit (AST::StructPatternFieldIdent &field)
+{}
+
+void
+AttributeChecker::visit (AST::StructPattern &pattern)
+{}
+
+// void AttributeChecker::visit(TupleStructItems& tuple_items){}
+
+void
+AttributeChecker::visit (AST::TupleStructItemsNoRange &tuple_items)
+{}
+
+void
+AttributeChecker::visit (AST::TupleStructItemsRange &tuple_items)
+{}
+
+void
+AttributeChecker::visit (AST::TupleStructPattern &pattern)
+{}
+
+// void AttributeChecker::visit(TuplePatternItems& tuple_items){}
+
+void
+AttributeChecker::visit (AST::TuplePatternItemsMultiple &tuple_items)
+{}
+
+void
+AttributeChecker::visit (AST::TuplePatternItemsRanged &tuple_items)
+{}
+
+void
+AttributeChecker::visit (AST::TuplePattern &pattern)
+{}
+
+void
+AttributeChecker::visit (AST::GroupedPattern &pattern)
+{}
+
+void
+AttributeChecker::visit (AST::SlicePattern &pattern)
+{}
+
+// rust-stmt.h
+void
+AttributeChecker::visit (AST::EmptyStmt &stmt)
+{}
+
+void
+AttributeChecker::visit (AST::LetStmt &stmt)
+{}
+
+void
+AttributeChecker::visit (AST::ExprStmtWithoutBlock &stmt)
+{}
+
+void
+AttributeChecker::visit (AST::ExprStmtWithBlock &stmt)
+{}
+
+// rust-type.h
+void
+AttributeChecker::visit (AST::TraitBound &bound)
+{}
+
+void
+AttributeChecker::visit (AST::ImplTraitType &type)
+{}
+
+void
+AttributeChecker::visit (AST::TraitObjectType &type)
+{}
+
+void
+AttributeChecker::visit (AST::ParenthesisedType &type)
+{}
+
+void
+AttributeChecker::visit (AST::ImplTraitTypeOneBound &type)
+{}
+
+void
+AttributeChecker::visit (AST::TraitObjectTypeOneBound &type)
+{}
+
+void
+AttributeChecker::visit (AST::TupleType &type)
+{}
+
+void
+AttributeChecker::visit (AST::NeverType &type)
+{}
+
+void
+AttributeChecker::visit (AST::RawPointerType &type)
+{}
+
+void
+AttributeChecker::visit (AST::ReferenceType &type)
+{}
+
+void
+AttributeChecker::visit (AST::ArrayType &type)
+{}
+
+void
+AttributeChecker::visit (AST::SliceType &type)
+{}
+
+void
+AttributeChecker::visit (AST::InferredType &type)
+{}
+
+void
+AttributeChecker::visit (AST::BareFunctionType &type)
+{}
+
+} // namespace Analysis
+} // namespace Rust
diff --git a/gcc/rust/util/rust-attributes.h b/gcc/rust/util/rust-attributes.h
new file mode 100644
index 00000000000..3ac93ff5908
--- /dev/null
+++ b/gcc/rust/util/rust-attributes.h
@@ -0,0 +1,270 @@
+// Copyright (C) 2020-2022 Free Software Foundation, Inc.
+
+// This file is part of GCC.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with GCC; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include "rust-ast.h"
+#include "rust-system.h"
+#include "rust-ast-visitor.h"
+
+namespace Rust {
+namespace Analysis {
+
+enum CompilerPass
+{
+  UNKNOWN,
+
+  EXPANSION,
+  NAME_RESOLUTION,
+  HIR_LOWERING,
+  TYPE_CHECK,
+  STATIC_ANALYSIS,
+  CODE_GENERATION
+};
+
+struct BuiltinAttrDefinition
+{
+  std::string name;
+  CompilerPass handler;
+
+  static BuiltinAttrDefinition get_error ()
+  {
+    return BuiltinAttrDefinition{"", UNKNOWN};
+  }
+
+  static BuiltinAttrDefinition &error_node ()
+  {
+    static BuiltinAttrDefinition error_node = get_error ();
+    return error_node;
+  }
+
+  bool is_error () const { return name.empty (); }
+};
+
+class BuiltinAttributeMappings
+{
+public:
+  static BuiltinAttributeMappings *get ();
+
+  const BuiltinAttrDefinition &
+  lookup_builtin (const std::string &attr_name) const;
+
+private:
+  BuiltinAttributeMappings ();
+
+  std::map<std::string, const BuiltinAttrDefinition> mappings;
+};
+
+/**
+ * Checks the validity of various attributes. The goal of this visitor is to
+ * make sure that attributes are applied in allowed contexts, for example to
+ * make sure that #[inline] is only applied to functions and closures, as well
+ * as checking the "arguments" or input given to these attributes, making sure
+ * it is appropriate and valid.
+ */
+class AttributeChecker : public AST::ASTVisitor
+{
+public:
+  AttributeChecker ();
+
+  /**
+   * Check all the attributes of all the items of a crate
+   */
+  void go (AST::Crate &crate);
+
+private:
+  /* Check the validity of a given attribute */
+  void check_attribute (const AST::Attribute &attribute);
+
+  /* Check the validity of all given attributes */
+  void check_attributes (const AST::AttrVec &attributes);
+
+  // rust-ast.h
+  void visit (AST::Token &tok);
+  void visit (AST::DelimTokenTree &delim_tok_tree);
+  void visit (AST::AttrInputMetaItemContainer &input);
+  void visit (AST::IdentifierExpr &ident_expr);
+  void visit (AST::Lifetime &lifetime);
+  void visit (AST::LifetimeParam &lifetime_param);
+  void visit (AST::ConstGenericParam &const_param);
+
+  // rust-path.h
+  void visit (AST::PathInExpression &path);
+  void visit (AST::TypePathSegment &segment);
+  void visit (AST::TypePathSegmentGeneric &segment);
+  void visit (AST::TypePathSegmentFunction &segment);
+  void visit (AST::TypePath &path);
+  void visit (AST::QualifiedPathInExpression &path);
+  void visit (AST::QualifiedPathInType &path);
+
+  // rust-expr.h
+  void visit (AST::LiteralExpr &expr);
+  void visit (AST::AttrInputLiteral &attr_input);
+  void visit (AST::MetaItemLitExpr &meta_item);
+  void visit (AST::MetaItemPathLit &meta_item);
+  void visit (AST::BorrowExpr &expr);
+  void visit (AST::DereferenceExpr &expr);
+  void visit (AST::ErrorPropagationExpr &expr);
+  void visit (AST::NegationExpr &expr);
+  void visit (AST::ArithmeticOrLogicalExpr &expr);
+  void visit (AST::ComparisonExpr &expr);
+  void visit (AST::LazyBooleanExpr &expr);
+  void visit (AST::TypeCastExpr &expr);
+  void visit (AST::AssignmentExpr &expr);
+  void visit (AST::CompoundAssignmentExpr &expr);
+  void visit (AST::GroupedExpr &expr);
+  void visit (AST::ArrayElemsValues &elems);
+  void visit (AST::ArrayElemsCopied &elems);
+  void visit (AST::ArrayExpr &expr);
+  void visit (AST::ArrayIndexExpr &expr);
+  void visit (AST::TupleExpr &expr);
+  void visit (AST::TupleIndexExpr &expr);
+  void visit (AST::StructExprStruct &expr);
+  void visit (AST::StructExprFieldIdentifier &field);
+  void visit (AST::StructExprFieldIdentifierValue &field);
+  void visit (AST::StructExprFieldIndexValue &field);
+  void visit (AST::StructExprStructFields &expr);
+  void visit (AST::StructExprStructBase &expr);
+  void visit (AST::CallExpr &expr);
+  void visit (AST::MethodCallExpr &expr);
+  void visit (AST::FieldAccessExpr &expr);
+  void visit (AST::ClosureExprInner &expr);
+  void visit (AST::BlockExpr &expr);
+  void visit (AST::ClosureExprInnerTyped &expr);
+  void visit (AST::ContinueExpr &expr);
+  void visit (AST::BreakExpr &expr);
+  void visit (AST::RangeFromToExpr &expr);
+  void visit (AST::RangeFromExpr &expr);
+  void visit (AST::RangeToExpr &expr);
+  void visit (AST::RangeFullExpr &expr);
+  void visit (AST::RangeFromToInclExpr &expr);
+  void visit (AST::RangeToInclExpr &expr);
+  void visit (AST::ReturnExpr &expr);
+  void visit (AST::UnsafeBlockExpr &expr);
+  void visit (AST::LoopExpr &expr);
+  void visit (AST::WhileLoopExpr &expr);
+  void visit (AST::WhileLetLoopExpr &expr);
+  void visit (AST::ForLoopExpr &expr);
+  void visit (AST::IfExpr &expr);
+  void visit (AST::IfExprConseqElse &expr);
+  void visit (AST::IfExprConseqIf &expr);
+  void visit (AST::IfExprConseqIfLet &expr);
+  void visit (AST::IfLetExpr &expr);
+  void visit (AST::IfLetExprConseqElse &expr);
+  void visit (AST::IfLetExprConseqIf &expr);
+  void visit (AST::IfLetExprConseqIfLet &expr);
+  void visit (AST::MatchExpr &expr);
+  void visit (AST::AwaitExpr &expr);
+  void visit (AST::AsyncBlockExpr &expr);
+
+  // rust-item.h
+  void visit (AST::TypeParam &param);
+  void visit (AST::LifetimeWhereClauseItem &item);
+  void visit (AST::TypeBoundWhereClauseItem &item);
+  void visit (AST::Method &method);
+  void visit (AST::Module &module);
+  void visit (AST::ExternCrate &crate);
+  void visit (AST::UseTreeGlob &use_tree);
+  void visit (AST::UseTreeList &use_tree);
+  void visit (AST::UseTreeRebind &use_tree);
+  void visit (AST::UseDeclaration &use_decl);
+  void visit (AST::Function &function);
+  void visit (AST::TypeAlias &type_alias);
+  void visit (AST::StructStruct &struct_item);
+  void visit (AST::TupleStruct &tuple_struct);
+  void visit (AST::EnumItem &item);
+  void visit (AST::EnumItemTuple &item);
+  void visit (AST::EnumItemStruct &item);
+  void visit (AST::EnumItemDiscriminant &item);
+  void visit (AST::Enum &enum_item);
+  void visit (AST::Union &union_item);
+  void visit (AST::ConstantItem &const_item);
+  void visit (AST::StaticItem &static_item);
+  void visit (AST::TraitItemFunc &item);
+  void visit (AST::TraitItemMethod &item);
+  void visit (AST::TraitItemConst &item);
+  void visit (AST::TraitItemType &item);
+  void visit (AST::Trait &trait);
+  void visit (AST::InherentImpl &impl);
+  void visit (AST::TraitImpl &impl);
+  void visit (AST::ExternalStaticItem &item);
+  void visit (AST::ExternalFunctionItem &item);
+  void visit (AST::ExternBlock &block);
+
+  // rust-macro.h
+  void visit (AST::MacroMatchFragment &match);
+  void visit (AST::MacroMatchRepetition &match);
+  void visit (AST::MacroMatcher &matcher);
+  void visit (AST::MacroRulesDefinition &rules_def);
+  void visit (AST::MacroInvocation &macro_invoc);
+  void visit (AST::MetaItemPath &meta_item);
+  void visit (AST::MetaItemSeq &meta_item);
+  void visit (AST::MetaWord &meta_item);
+  void visit (AST::MetaNameValueStr &meta_item);
+  void visit (AST::MetaListPaths &meta_item);
+  void visit (AST::MetaListNameValueStr &meta_item);
+
+  // rust-pattern.h
+  void visit (AST::LiteralPattern &pattern);
+  void visit (AST::IdentifierPattern &pattern);
+  void visit (AST::WildcardPattern &pattern);
+  // void visit(RangePatternBound& bound);
+  void visit (AST::RangePatternBoundLiteral &bound);
+  void visit (AST::RangePatternBoundPath &bound);
+  void visit (AST::RangePatternBoundQualPath &bound);
+  void visit (AST::RangePattern &pattern);
+  void visit (AST::ReferencePattern &pattern);
+  // void visit(StructPatternField& field);
+  void visit (AST::StructPatternFieldTuplePat &field);
+  void visit (AST::StructPatternFieldIdentPat &field);
+  void visit (AST::StructPatternFieldIdent &field);
+  void visit (AST::StructPattern &pattern);
+  // void visit(TupleStructItems& tuple_items);
+  void visit (AST::TupleStructItemsNoRange &tuple_items);
+  void visit (AST::TupleStructItemsRange &tuple_items);
+  void visit (AST::TupleStructPattern &pattern);
+  // void visit(TuplePatternItems& tuple_items);
+  void visit (AST::TuplePatternItemsMultiple &tuple_items);
+  void visit (AST::TuplePatternItemsRanged &tuple_items);
+  void visit (AST::TuplePattern &pattern);
+  void visit (AST::GroupedPattern &pattern);
+  void visit (AST::SlicePattern &pattern);
+
+  // rust-stmt.h
+  void visit (AST::EmptyStmt &stmt);
+  void visit (AST::LetStmt &stmt);
+  void visit (AST::ExprStmtWithoutBlock &stmt);
+  void visit (AST::ExprStmtWithBlock &stmt);
+
+  // rust-type.h
+  void visit (AST::TraitBound &bound);
+  void visit (AST::ImplTraitType &type);
+  void visit (AST::TraitObjectType &type);
+  void visit (AST::ParenthesisedType &type);
+  void visit (AST::ImplTraitTypeOneBound &type);
+  void visit (AST::TraitObjectTypeOneBound &type);
+  void visit (AST::TupleType &type);
+  void visit (AST::NeverType &type);
+  void visit (AST::RawPointerType &type);
+  void visit (AST::ReferenceType &type);
+  void visit (AST::ArrayType &type);
+  void visit (AST::SliceType &type);
+  void visit (AST::InferredType &type);
+  void visit (AST::BareFunctionType &type);
+};
+
+} // namespace Analysis
+} // namespace Rust