add Debug to search::Outcome

Author: Byron

gix-attributes/src/search/outcome.rs

@@ -223,6 +223,29 @@ impl Outcome {
     }
 }
 
+impl std::fmt::Debug for Outcome {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        struct AsDisplay<'a>(&'a dyn std::fmt::Display);
+        impl std::fmt::Debug for AsDisplay<'_> {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                self.0.fmt(f)
+            }
+        }
+
+        let mut dbg = f.debug_tuple("Outcome");
+        if self.selected.is_empty() {
+            for match_ in self.iter() {
+                dbg.field(&AsDisplay(&match_.assignment));
+            }
+        } else {
+            for match_ in self.iter_selected() {
+                dbg.field(&AsDisplay(&match_.assignment));
+            }
+        }
+        dbg.finish()
+    }
+}
+
 /// Mutation
 impl MetadataCollection {
     /// Assign order ids to each attribute either in macros (along with macros themselves) or attributes of patterns, and store