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0 pointsvarajelle4y ago0 comments

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

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pjmlp4y ago

Does it? 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=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?

varajelleOP4y 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?

pjmlp4y 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?

varajelleOP4y 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.

j / k navigate · click thread line to collapse

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pjmlp4y ago

Does it? 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=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?

varajelleOP4y 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?

pjmlp4y 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?

varajelleOP4y 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.

j / k navigate · click thread line to collapse