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diff --git a/gcc/rust/hir/tree/rust-hir-bound-abstract.h b/gcc/rust/hir/tree/rust-hir-bound-abstract.h
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+// Copyright (C) 2020-2024 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/>.
+
+#ifndef RUST_HIR_BOUND_ABSTRACT_H
+#define RUST_HIR_BOUND_ABSTRACT_H
+
+#include "rust-hir-visitable.h"
+#include "rust-system.h"
+#include "rust-hir-map.h"
+
+namespace Rust {
+namespace HIR {
+
+/* Abstract base class representing a type param bound - Lifetime and TraitBound
+ * extends it */
+class TypeParamBound : public FullVisitable
+{
+public:
+  using FullVisitable::accept_vis;
+  enum BoundType
+  {
+    LIFETIME,
+    TRAITBOUND
+  };
+
+  virtual ~TypeParamBound () {}
+
+  // Unique pointer custom clone function
+  std::unique_ptr<TypeParamBound> clone_type_param_bound () const
+  {
+    return std::unique_ptr<TypeParamBound> (clone_type_param_bound_impl ());
+  }
+
+  virtual std::string as_string () const = 0;
+
+  virtual Analysis::NodeMapping get_mappings () const = 0;
+
+  virtual location_t get_locus () const = 0;
+
+  virtual BoundType get_bound_type () const = 0;
+
+protected:
+  // Clone function implementation as pure virtual method
+  virtual TypeParamBound *clone_type_param_bound_impl () const = 0;
+};
+
+} // namespace HIR
+} // namespace Rust
+
+#endif