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Rust also has the vocabulary types required for interoperability, such as Future and Waker. Or what exactly make C++ more interoperable?

• pjmlp 5y ago
  Does it? https://book.async.rs/overview/std-and-library-futures.html https://book.async.rs/overview/std-and-library-futures.html C++ ones can interoperate with any type that plugs into the compiler magic expected by the co-routines code rewrite. If you want to deep dive into how Visual C++ does it, and how WinRT gets plugged into C++ co-routines, here is a very lengthy set of blog posts. https://devblogs.microsoft.com/oldnewthing/20210504-01/?p=105178 https://devblogs.microsoft.com/oldnewthing/20210504-01/?p=10... Now back to Rust, how can I interoperate across tokio, async-std, smol and fuchsia-std, as easy as I can between WinRT, and others?
  • varajelle 5y ago
    The std::future::Future from the rust standard library works with every runtime. Not sure I understand, what kind of interoperability you are talking about. What kinds of code works in C++ across runtimes, for which the equivalent in Rust doesn't?
    • pjmlp 5y ago
      In C++ you don't have the scenario like in Rust, where one is forced to use a specific async runtime for library xyz, because it depends on having tokio as runtime. Or has that situation been sorted out by now?
      • varajelle 5y ago
        In Rust you only are forced to use a specific runtime if you want to use its API. For example to spawn new tasks, or to block on a future. I believe that would be the same in C++. In Rust, you don't need to use a specific runtime if you just want to use async function in your library.