![c++11 - How to fix a C++ cyclical dependency with forward declaration in template class header - Stack Overflow c++11 - How to fix a C++ cyclical dependency with forward declaration in template class header - Stack Overflow](https://i.stack.imgur.com/0nVMV.png)
c++11 - How to fix a C++ cyclical dependency with forward declaration in template class header - Stack Overflow
![File:TRAIN S USA SOUTHERN PACIFIC CAB FORWARD CLASS AC-05 4-8-8-2 ARTICULATED OIL BURNING LOCO DESIGN - BUILT BY BALDWIN LOCO WORKS - ENGINE NUMBER 4114.jpg - Wikimedia Commons File:TRAIN S USA SOUTHERN PACIFIC CAB FORWARD CLASS AC-05 4-8-8-2 ARTICULATED OIL BURNING LOCO DESIGN - BUILT BY BALDWIN LOCO WORKS - ENGINE NUMBER 4114.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/4/4b/TRAIN_S_USA_SOUTHERN_PACIFIC_CAB_FORWARD_CLASS_AC-05_4-8-8-2_ARTICULATED_OIL_BURNING_LOCO_DESIGN_-_BUILT_BY_BALDWIN_LOCO_WORKS_-_ENGINE_NUMBER_4114.jpg)
File:TRAIN S USA SOUTHERN PACIFIC CAB FORWARD CLASS AC-05 4-8-8-2 ARTICULATED OIL BURNING LOCO DESIGN - BUILT BY BALDWIN LOCO WORKS - ENGINE NUMBER 4114.jpg - Wikimedia Commons
Build failure: "Forward declaration of class cannot have a nested name specifier" · Issue #5 · num3ric/Cinder-Skinning · GitHub
![Attempting to use the forward class 'ModulesProvider' as superclass of 'ExpoModulesProvider' · Issue #17705 · expo/expo · GitHub Attempting to use the forward class 'ModulesProvider' as superclass of 'ExpoModulesProvider' · Issue #17705 · expo/expo · GitHub](https://user-images.githubusercontent.com/11584712/171256400-56448afb-09f5-489c-b485-3a0bbc06316e.png)
Attempting to use the forward class 'ModulesProvider' as superclass of 'ExpoModulesProvider' · Issue #17705 · expo/expo · GitHub
Attempting to use the forward class 'ModulesProvider' as superclass of 'ExpoModulesProvider' · Issue #17705 · expo/expo · GitHub
![Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 6.1.x - Implementing MPLS Traffic Engineering [Cisco IOS XR Software (End-of-Sale)] - Cisco Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 6.1.x - Implementing MPLS Traffic Engineering [Cisco IOS XR Software (End-of-Sale)] - Cisco](https://www.cisco.com/c/dam/en/us/td/i/300001-400000/360001-370000/365001-366000/365265.tif/_jcr_content/renditions/365265.jpg)