v2.2.0 - GPRC/ASIO and overall improvements

Brief:

This release contains next major improvements in RPP:

• support of callback-based grpc - now RPP can be easily integrated with grpc to build powerful apps! Doc: https://victimsnino.github.io/ReactivePlusPlus/v2/docs/html/group__rppgrpc.html (small project-example https://github.com/victimsnino/GRPC-RPP-Chat)
• support of asio strand scheduler (thanks to @CorentinBT)
• several new operators
• huge performance improvements overall and especially in some operators
• big disposables redesign to provide more clear and explicit API and better performance
• overall docs enhancement (https://victimsnino.github.io/ReactivePlusPlus/v2/docs/html/index.html)

What's Changed

Core commits worth to mention:

New features

• add behavior_subject by @victimsnino in #553
• Add thread_pool schedulers by @victimsnino in #563
• Add variant_observable to avoid dynamic coversions by @victimsnino in #588
• Add initial support for GRPC++ by @victimsnino in #568
• element_at operator by @CorentinBT in #613
• Add server-based logic for rppgrpc by @victimsnino in #612
• implement simplest retry by @victimsnino in #619
• retry_when operator by @CorentinBT in #616
• asio strand scheduler by @CorentinBT in #627
• add dynamic connectable by @victimsnino in #672

Fixes/improvements

• Forward selector exception in on_error_resume_next + expose test utils by @CorentinBT in #556
• Dispose before on_error/on_completed by @CorentinBT in #558
• Add new benchmarks + speedup by @victimsnino in #562
• Expose observable strategy_type by @CorentinBT in #567
• Add get_value function to behavior_subject by @victimsnino in #570
• Fix disposing order by @victimsnino in #592
• fix buffer capacity by @victimsnino in #618
• Disambiguate tap operator by @CorentinBT in #625
• fix infinite looping by @victimsnino in #628
• remove disposables from scheduler worker by @victimsnino in #632
• fix order of calls by @victimsnino in #638
• Improve compilation errors by @victimsnino in #639
• Fix disposables issue by @victimsnino in #640
• remove useless calls by @victimsnino in #644
• improve static_asserts by @victimsnino in #643
• fix new_thread join by @victimsnino in #646
• fix threads by @victimsnino in #648
• move to doctest by @victimsnino in #649
• Fix deadlocks in operators related to is_disposed by @victimsnino in #661
• Refactor disposables by @victimsnino in #667
• Try to stabilize disposables logic by @victimsnino in #673
• refactor concat to speedup it by @victimsnino in #677
• speedup switch_on_next by @victimsnino in #682

Misc

• Cover all possible schedulables in main thread scheduler qt by @victimsnino in #550
• Add linesfrombytes example by @victimsnino in #554
• extend hooks a bit by @victimsnino in #557
• add missing checks by @victimsnino in #559
• Add conan for CI by @victimsnino in #573
• Cache conan by @victimsnino in #575
• fix typo by @daixtrose in #584
• Add trompeloil as mocking library by @victimsnino in #583
• Add more mock tests by @victimsnino in #587
• Extend doc by @victimsnino in #595
• add benchmarks over subjects by @victimsnino in #597
• Try to speedup subjects by @victimsnino in #596
• minor coverage change by @victimsnino in #621
• Use cppcheck right by @victimsnino in #654
• add new benchmarks by @victimsnino in #676

New Contributors

• @daixtrose made their first contribution in #584

Full Changelog: v2.1.1...v2.2.0