From 69af942b70b4fc023790d7765abcbac000331d8c Mon Sep 17 00:00:00 2001
From: Steven Gardiner <gardiner@fnal.gov>
Date: Sat, 3 May 2025 19:21:18 -0500
Subject: [PATCH] Add handling for the C++ language

---
 lua/jupytext/init.lua  | 4 ++++
 lua/jupytext/utils.lua | 1 +
 2 files changed, 5 insertions(+)

diff --git a/lua/jupytext/init.lua b/lua/jupytext/init.lua
index 1129208..fc3c408 100644
--- a/lua/jupytext/init.lua
+++ b/lua/jupytext/init.lua
@@ -136,6 +136,10 @@ local read_from_ipynb = function(ipynb_filename)
     ft = metadata.language
   end
 
+  if ft == "c++" then
+    ft = "cpp"
+  end
+
   -- In order to make :undo a no-op immediately after the buffer is read, we
   -- need to do this dance with 'undolevels'.  Actually discarding the undo
   -- history requires performing a change after setting 'undolevels' to -1 and,
diff --git a/lua/jupytext/utils.lua b/lua/jupytext/utils.lua
index 6019ca5..e61b3ba 100644
--- a/lua/jupytext/utils.lua
+++ b/lua/jupytext/utils.lua
@@ -7,6 +7,7 @@ local language_extensions = {
   R = "r",
   bash = "sh",
 }
+language_extensions["c++"] = "cpp"
 
 local language_names = {
   python3 = "python",