allow one-element dimIndex

Author: burrbull

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+- Allow single valued `dimIndex`
 - Added `reg_iter`, `reg_iter_mut` methods on `Peripheral` and `Cluster`
 - Added `DerefMut` for `Cluster`, `Register` and `Field`
 - Added `display_name` to `RegisterInfo`

src/types.rs

@@ -115,10 +115,8 @@ impl Parse for DimIndex {
             let end = unwrap!(unwrap!(parts.next()).parse::<u32>()) + 1;
 
             Ok((start..end).map(|i| i.to_string()).collect())
-        } else if text.contains(',') {
-            Ok(text.split(',').map(|s| s.to_string()).collect())
         } else {
-            unreachable!()
+            Ok(text.split(',').map(|s| s.to_string()).collect())
         }
     }
 }