C++20 - the hidden pearls
summary
The talk lists concrete, usable C++20 changes: the three-way (spaceship) operator lets the compiler auto-generate all six comparisons; consteval/constinit force compile-time init or immediate functions; std::span (dynamic extent) gives bounds-aware views of contiguous memory; chrono gains calendar and time zone types (the presenter spent ~80 pages on it); std::format offers Python-like formatting; semaphores, latches, barriers and jthread stop tokens enable fast coordination and cooperative interruption, and synchronized output streams prevent interleaved logging.
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chapters (13)
- 0:00Introduction to C++20
- 1:34Spaceship operator
- 6:23Designated initialization
- 9:42Constexpr improvements
- 13:30Template improvements
- 16:57Stood span container
- 20:01Library container updates
- 22:11Safe integer comparisons
- 25:47Chrono calendar expansion
- 30:03Formatting library
- 35:03Concurrency improvements
- 41:35Cooperative interruption
- 56:53Conclusion
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