Practical Type Erasure

on YouTube ↗01h 01m

" summary

Shows a real production configuration system built with boost any and type erasure that actually runs on GCC 4.8/4.9 and cling 3.4 but not tested on Windows. Explains the implementation: erased-type storage via a polymorphic internal base, handlers per-type, search-order for multiple backends, JSON and database backends, and a memory and environment backend. Surprising specifics: injected types must be copyable, the API must predefine allowed operations, missing-vs-empty cannot be distinguished, and the system works in deployed code.

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" chapters (17)

1. 0:00Intro
2. 0:24Outline
3. 2:41Type Erasure: Implementation
4. 6:04Boost Any
5. 9:02Practical Type Erasure
6. 16:28Configuration Framework
7. 21:53Architecture
8. 23:07Client Facing Front End
9. 27:03Back End Base Class
10. 36:01Glue Getter Predicate
11. 43:50Glue Setter
12. 44:59Glue Handlers
13. 47:19Back End Simple Handler
14. 49:07Backend Env Handler
15. 55:03Back End JSON Handler
16. 57:27Back End Real Life
17. 59:44Additional Applications

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