Adding `must_future` library as a dependency

Run this command in a terminal, in your project's directory:

cargo add must_future

To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:

must_future = "0.1.2"

The must_future library will be automatically available globally. Read the must_future library documentation.

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must_future

BoxFutures cannot be marked #[must_use] because they are just type definitions. This newtype struct wraps a BoxFuture with something that can be marked #[must_use].

Will Not Compile:

#![deny(unused_must_use)]

use futures::future::FutureExt;

#[tokio::main]
async fn main() {
    fn get_future() -> must_future::MustBoxFuture<'static, ()> {
        async { }.boxed().into()
    }

    get_future(); // unused `must_future::MustBoxFuture` that must be used
}

Adding must_future library as a dependency

Adding `must_future` library as a dependency