Cargo Features

[dependencies]
smol-hyper = { version = "0.1.1", default-features = false, features = ["smol"] }
default = smol

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

smol default = async-executor, async-io

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

async-executor smol
async-io smol