--- a/libinterp/parse-tree/module.mk	Tue Apr 02 13:13:17 2024 -0400
+++ b/libinterp/parse-tree/module.mk	Tue Apr 02 13:25:59 2024 -0400
@@ -23,6 +23,7 @@
   %reldir%/pt-colon.h \
   %reldir%/pt-const.h \
   %reldir%/pt-decl.h \
+  %reldir%/pt-delimiter-list.h \
   %reldir%/pt-eval.h \
   %reldir%/pt-except.h \
   %reldir%/pt-exp.h \

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/parse-tree/pt-delimiter-list.h	Tue Apr 02 13:25:59 2024 -0400
@@ -0,0 +1,59 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2024 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave 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 of the License, or
+// (at your option) any later version.
+//
+// Octave 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 Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if ! defined (octave_tree_delimiter_list_h)
+#define octave_tree_delimiter_list_h 1
+
+#include "octave-config.h"
+
+#include <stack>
+
+#include "token.h"
+
+OCTAVE_BEGIN_NAMESPACE(octave)
+
+class tree_delimiter_list
+{
+public:
+
+  typedef std::pair<token, token> element_type;
+
+  OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE_DELETE (tree_delimiter_list)
+
+    size_t count () const { return m_delimiters.size (); }
+
+  void push (const token& open_delim, const token& close_delim)
+  {
+    m_delimiters.push (element_type (open_delim, close_delim));
+  }
+
+private:
+
+  std::stack<element_type> m_delimiters;
+};
+
+OCTAVE_END_NAMESPACE(octave)
+
+#endif