While this may be worth revisiting, we should first quantify the benefits and
identify the compilers that support it. Ultimately, we may never use pragma
once in favor of strictly using standard C++.
- make sure we don't get conflicting enums (CODE_ERROR)
- fix template specialization for Far::TopologyRefinerFactory in regression/common/vtr_utils
- fix remaining error reporting code around osd
- change error codes from situational to general (fatal / coding / run-time...)
- pull error functions from Osd into Far
- add a templated topology validation reporting system to Far::TopologyRefinerFactory
- fix fallout on rest of code-base