Cargo Features

async-global-executor = { version = "2.4.0", default-features = false, features = ["tokio", "tokio02", "tokio03", "async-io"] }
default = async-io

The async-io feature is set by default whenever async-global-executor is added without default-features = false somewhere in the dependency tree.

tokio = tokio-crate
tokio02 = tokio02-crate
tokio03 = tokio03-crate

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

async-io default
tokio-crate tokio?

Enables rt and rt-multi-thread of tokio

tokio02-crate tokio02?

Enables rt-core of tokio ^0.2

tokio03-crate tokio03?

Enables rt and rt-multi-thread of tokio ^0.3.4