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diff --git a/gcc/rust/hir/tree/rust-hir-pattern-abstract.h b/gcc/rust/hir/tree/rust-hir-pattern-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_PATTERN_ABSTRACT_H
+#define RUST_HIR_PATTERN_ABSTRACT_H
+
+#include "rust-hir-visitable.h"
+#include "rust-hir-visitor.h"
+#include "rust-hir-node.h"
+#include "rust-system.h"
+
+namespace Rust {
+namespace HIR {
+
+// Pattern base HIR node
+class Pattern : public Node, virtual public FullVisitable
+{
+public:
+  using FullVisitable::accept_vis;
+
+  enum PatternType
+  {
+    PATH,
+    LITERAL,
+    IDENTIFIER,
+    WILDCARD,
+    RANGE,
+    REFERENCE,
+    STRUCT,
+    TUPLE_STRUCT,
+    TUPLE,
+    GROUPED,
+    SLICE,
+    ALT
+  };
+
+  BaseKind get_hir_kind () override final { return PATTERN; }
+
+  // Unique pointer custom clone function
+  std::unique_ptr<Pattern> clone_pattern () const
+  {
+    return std::unique_ptr<Pattern> (clone_pattern_impl ());
+  }
+
+  // possible virtual methods: is_refutable()
+
+  virtual ~Pattern () {}
+
+  virtual std::string as_string () const = 0;
+
+  virtual void accept_vis (HIRPatternVisitor &vis) = 0;
+
+  virtual const Analysis::NodeMapping &get_mappings () const = 0;
+
+  virtual location_t get_locus () const = 0;
+
+  virtual PatternType get_pattern_type () const = 0;
+
+protected:
+  // Clone pattern implementation as pure virtual method
+  virtual Pattern *clone_pattern_impl () const = 0;
+};
+
+} // namespace HIR
+} // namespace Rust
+
+#endif