Success-or-failure return types where extra information in addition to the error code accompanies failure.

1. The Filesystem TS
2. Upgrading the Filesystem TS
3. Auto-throwing filesystem_error

How to metaprogram construction of objects which use result to return failure instead of throwing a C++ exception.

1. Two phase construction
2. A file handle
3. Phase 2 construction
4. Phase 3
5. construct
6. Alternatives

Intercepting useful events such as initial construction, copies and moves so you can capture backtraces, fire debug breakpoints etc.

1. Keeping state
2. ADL bridging
3. Hook result
4. Custom exception ptr
5. Hook outcome

Interoperating with std::expected and other ValueOrError concept matching types.

1. Incommensurate E types
2. value_or_error Concept
3. The HTTP library
4. The HTMLTidy library
5. The File I/O library
6. The Application
7. Mapping the HTTP library into the Application 1/2
8. Mapping the HTTP library into the Application 2/2
9. Mapping the File I/O library into the Application
10. Mapping the HTMLTidy library into the Application
11. In use
12. Conclusion