提交N3 功能的改动

backend/engine/cdsl_engine/capabilities.py

@@ -38,15 +38,15 @@ _BODY_MUTATING_ATOMICS = frozenset({
     "extrude_add_blind", "extrude_add_two_sided", "extrude_cut_blind",
     "extrude_cut_through",
     "revolve_add", "revolve_cut", "sphere_add", "box_add", "cylinder_add",
-    "thread_add", "thread_cut", *_HOLE_ATOMICS, "fillet", "chamfer",
+    "thread_add", "thread_cut", "bend_add", *_HOLE_ATOMICS, "fillet", "chamfer",
 })
 # A pattern may replay a previous pattern as well as a direct body mutation.
-# Context-only features have no geometry definition to instance.  thread_add
-# and thread_cut are excluded: pattern translation does not yet move their
-# parametric axis, so a replayed thread would silently re-run at the original
-# location.
+# Context-only features have no geometry definition to instance.  thread_add,
+# thread_cut and bend_add are excluded: pattern translation does not yet move
+# their parametric axis/frame, so a replayed instance would silently re-run at
+# the original location.
 _REPLAYABLE_ATOMICS = (
-    _BODY_MUTATING_ATOMICS - frozenset({"thread_add", "thread_cut"})
+    _BODY_MUTATING_ATOMICS - frozenset({"thread_add", "thread_cut", "bend_add"})
 ) | frozenset({"pattern_linear", "pattern_mirror", "pattern_circular"})
 _SUPPORTED_EXTENTS = frozenset({
     "blind", "mid_plane", "through_all", "through_all_both", "through_all_and_blind",
@@ -312,7 +312,7 @@ class CapabilityAnalyzer:
                 required.append(f"extent:{end_type}")
                 if end_type not in _SUPPORTED_EXTENTS:
                     blockers.append(self._blocker(node.feature_id, "unsupported_extent", "The extent needs a resolved topology selector or is not implemented", extent=end_type))
-                target_kind = _EXTENT_TARGET_KINDS.get(end_type)
+                target_kind = _EXTENT_TARGET_KINDS.get(end_type or "")
                 if target_kind:
                     required.append(f"selector:extent_target:{target_kind}")
                     reference = end_condition.get("reference")
@@ -341,7 +341,7 @@ class CapabilityAnalyzer:
                             node.feature_id, "unsupported_reverse_extent",
                             "The reverse extent is not implemented", extent=reverse_type,
                         ))
-                    reverse_target_kind = _EXTENT_TARGET_KINDS.get(reverse_type)
+                    reverse_target_kind = _EXTENT_TARGET_KINDS.get(reverse_type or "")
                     if reverse_target_kind:
                         required.append(f"selector:reverse_extent_target:{reverse_target_kind}")
                         reverse_reference = reverse_condition.get("reference")
@@ -465,7 +465,7 @@ class CapabilityAnalyzer:
         body_producers = {
             "extrude_add_blind", "extrude_add_two_sided", "extrude_cut_blind",
             "revolve_add", "revolve_cut", "sphere_add", "box_add", "cylinder_add",
-            "thread_add",
+            "thread_add", "bend_add",
             # thread_cut 与 extrude_cut_blind/revolve_cut 一致：无宿主时由
             # active_body 前置阻止，文档含该类特征即视为携带可执行几何。
             "thread_cut",