Cargo Features

[dependencies]
countio = { version = "0.2.19", default-features = false, features = ["std", "full", "tokio", "futures"] }
default = std

The std feature is set by default whenever countio is added without default-features = false somewhere in the dependency tree.

std default full?
full = futures, std, tokio
tokio full?

Enables tokio

futures full?

Enables futures-io

countio has 5 features without comments.