Cargo Features

[dependencies]
poly-once = { version = "1.0.0", default-features = false, features = ["async-tokio", "async-tokio-mt"] }
default = async-tokio-mt

The async-tokio-mt feature is set by default whenever poly-once is added without default-features = false somewhere in the dependency tree.

async-tokio

Enables rt of tokio

tokio:

Includes basic task execution capabilities

async-tokio-mt default

Enables rt and rt-multi-thread of tokio

poly-once has 3 features without comments.