feat: don't add children costs during compilation

src/bartiq/compilation/_compile.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import copy
 from typing import Any, Optional, cast, overload
 
 from .. import Port, Routine
@@ -97,7 +98,10 @@ def _compile_routine(
 
     compiled_routine_with_funcs = _compile_routine_with_functions(routine_with_functions, functions_map, backend)
     compiled_routine_with_funcs.name = root_name
-    return compiled_routine_with_funcs.to_routine()
+
+    compiled_routine = compiled_routine_with_funcs.to_routine()
+    compiled_routine = _remove_children_costs(compiled_routine)
+    return compiled_routine
 
 
 def _add_function_to_routine(
@@ -674,3 +678,11 @@ def _split_local_path(path: str) -> tuple[str, str]:
     """Split path into parent path and local name, much like directory path and a file name."""
     *parent_path, name = path.rsplit(".", 1)
     return ("" if parent_path == [] else parent_path[0]), name
+
+
+def _remove_children_costs(routine: Routine) -> Routine:
+    for subroutine in routine.walk():
+        for resource in copy.copy(subroutine.resources):
+            if "." in resource:
+                del subroutine.resources[resource]
+    return routine

tests/compilation/data/compile_test_data.yaml

@@ -18,7 +18,7 @@
         type: other
         value: {type: str, value: x + y}
     input_params: [x, y]
-# Children with independent resources, unlinked params,  no ports
+# Children with independent resources, unlinked params, no ports
 - - name: root
     type: null
     children:
@@ -68,14 +68,6 @@
             value: {type: str, value: x + y}
         input_params: [x, y]
     resources:
-      a.z:
-        name: a.z
-        type: other
-        value: {type: str, value: a.x + a.y}
-      b.z:
-        name: b.z
-        type: other
-        value: {type: str, value: b.x + b.y}
       z:
         name: z
         type: other