Enable all mio features in Rust Playground

[peterjoel]

Some common mio examples do not currently work in Rust playground (https://play.rust-lang.org/), because modules like net are not available with default features.

[Keruspe]

Shouldn't this be in the features section rather than in the examples one?

[peterjoel]

Shouldn't this be in the features section rather than in the examples one?

Yes, indeed. I will change that.

[Thomasdezeeuw]

I have no idea if this would work or not, is there any documentation for the playground? Couldn't it just use --all-features? That would make it easier to maintain for us, compared to having to keep this feature up-to-date (enabling all other features).

[peterjoel]

@Thomasdezeeuw rust-lang/rust-playground#192 (comment)

[Thomasdezeeuw]

Looking at rust-lang/rust-playground#192 (comment), could we do the following?

# Enable all features on the playground.
[package.metadata.playground]
all-features = true

Do we have any way to to test this, besides publishing a new version and trying?

[peterjoel]

@Thomasdezeeuw I will have a go at building and running the playground locally.

[shepmaster]

Couldn't it just use --all-features

In general, no, as it’s possible to have conflicting sets of features or features that require nightly. Of course, a crate can opt in to all features if it knows that’s feasible for itself.

[kleimkuhler]

Thanks @peterjoel! I think features can remain how it is without setting additional metadata.

[Thomasdezeeuw]

LGTM.

[Thomasdezeeuw]

Thanks!