Merge #8329 'API: Make nvim_set_option() update :verbose set …'

src/nvim/option_defs.h

@@ -3,6 +3,7 @@
 
 #include "nvim/types.h"
 #include "nvim/macros.h"  // For EXTERN
+#include "eval/typval.h"  // For scid_T
 
 // option_defs.h: definition of global variables for settable options
 
@@ -819,4 +820,10 @@ enum {
 
 #define SB_MAX 100000  // Maximum 'scrollback' value.
 
+/// Stores an identifier of a script or channel that last set an option.
+typedef struct {
+  scid_T script_id;        /// Script ID or one of SID_* special values.
+  uint64_t channel_id;     /// Only used when script_id is SID_API_CLIENT.
+} LastSet;
+
 #endif // NVIM_OPTION_DEFS_H