api: Replace set_var(name, NIL) with del_var(name)

1 files changed, 19 insertions, 2 deletions

diff --git a/src/nvim/api/buffer.c b/src/nvim/api/buffer.c
index c25a9789c5..075f101f61 100644
--- a/src/nvim/api/buffer.c
+++ b/src/nvim/api/buffer.c
@@ -423,7 +423,7 @@ Object buffer_get_var(Buffer buffer, String name, Error *err)
   return dict_get_value(buf->b_vars, name, err);
 }
 
-/// Sets a buffer-scoped (b:) variable. 'nil' value deletes the variable.
+/// Sets a buffer-scoped (b:) variable
 ///
 /// @param buffer The buffer handle
 /// @param name The variable name
@@ -438,7 +438,24 @@ Object buffer_set_var(Buffer buffer, String name, Object value, Error *err)
     return (Object) OBJECT_INIT;
   }
 
-  return dict_set_value(buf->b_vars, name, value, err);
+  return dict_set_value(buf->b_vars, name, value, false, err);
+}
+
+/// Removes a buffer-scoped (b:) variable
+///
+/// @param buffer The buffer handle
+/// @param name The variable name
+/// @param[out] err Details of an error that may have occurred
+/// @return The old value
+Object buffer_del_var(Buffer buffer, String name, Error *err)
+{
+  buf_T *buf = find_buffer_by_handle(buffer, err);
+
+  if (!buf) {
+    return (Object) OBJECT_INIT;
+  }
+
+  return dict_set_value(buf->b_vars, name, NIL, true, err);
 }
 
 /// Gets a buffer option value