Cargo Features

io-reactor = { version = "0.5.2", default-features = false, features = ["all"] }
default = popol

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

all = log, mio, polling, popol

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.

popol default all?

Affects poller::popol

polling all?
mio all?

Enables mio

epoll = { version = "4.3.1", optional = true } - NB: epoll not supported on MacOS

log all?