Sort on length of match

txtlang/src/lib.rs

@@ -1,3 +1,4 @@
+use std::cmp::Reverse;
 use std::str;
 
 use bstr::ByteSlice;
@@ -67,6 +68,8 @@ pub fn scan(input: impl AsRef<[u8]>) -> Vec<Match> {
         index += 1;
     }
 
+    result.sort_by_key(|mat| Reverse(mat.end - mat.start));
+
     result
 }
 
@@ -90,4 +93,23 @@ mod tests {
     fn test_bug_001() {
         assert_eq!(scan("ampersand"), vec![]);
     }
+
+    #[test]
+    fn test_sort_by_length() {
+        assert_eq!(
+            scan("Ottoman Turkish"),
+            vec![
+                Match {
+                    language: Language::Ota,
+                    start: 0,
+                    end: 15
+                },
+                Match {
+                    language: Language::Tur,
+                    start: 8,
+                    end: 15
+                }
+            ]
+        );
+    }
 }