Cargo Features

configparser has no features set by default.

[dependencies]
configparser = { version = "3.1.0", features = ["async-std", "indexmap"] }
async-std = tokio

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.

indexmap implicit feature

Enables indexmap

indexmap:

A hash table with consistent order and fast iteration

tokio async-std?