add check for field name

Author: burrbull

src/generate/register.rs

@@ -281,7 +281,12 @@ pub fn fields(
                 let suffixes_str = format!("({}-{})", first, first + de.dim - 1);
                 Some((first, de.dim, de.dim_increment, suffixes, suffixes_str))
             }
-            Field::Single(_) => None,
+            Field::Single(_) => {
+                if f.name.contains("%s") {
+                    return Err(format!("incorrect field {}", f.name))?;
+                }
+                None
+            }
         };
 
         if can_read {