aha, design problem

Author: molpopgen

src/table_column.rs

@@ -8,6 +8,15 @@ impl<T> TableColumn<'_, T> {
     }
 }
 
+impl<T> TableColumn<'_, T>
+where
+    T: Copy,
+{
+    pub fn iter(&self) -> impl Iterator<Item = T> + '_ {
+        self.0.iter().cloned()
+    }
+}
+
 #[derive(Debug)]
 #[repr(transparent)]
 pub struct MutableTableColumn<'table, T>(&'table mut [T]);

tests/test_tables.rs

@@ -550,3 +550,11 @@ mod test_metadata_round_trips {
         );
     }
 }
+
+#[test]
+fn test_node_table_inidividual_column() {
+    let mut t = tskit::NodeTable::new().unwrap();
+    let node = t.add_row(tskit::NodeFlags::new_sample(), 0.0, -1, -1).unwrap();
+    let individual = t.individual_column();
+    assert_eq(individual[node], tskit::IndividualId::NULL);
+}