C++ Development

House style for every C++ change, however small.

Process:

1. Read references/style-and-design.md once per session before the first C++ edit
2. Make every new or modified line conformant
3. Document every public symbol with a contract comment (what it does, ownership, failure behavior)
4. Write comments in American English unless the user explicitly requests another language
5. When the file is fully compliant, add a header comment: // C++ guideline compliant {date} where {date} is the guideline date/version

Non-negotiables (see references for detail)