Cargo Features

[dependencies]
clickhouse-srv = { version = "0.3.1", default-features = false, features = ["tls", "tokio_io", "native-tls"] }
default = tokio_io

The tokio_io feature is set by default whenever clickhouse-srv is added without default-features = false somewhere in the dependency tree.

tls = tokio-native-tls

Affects options::Certificate

tokio_io default = 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.

native-tls implicit feature

Enables native-tls

native-tls:

A wrapper over a platform's native TLS implementation

tokio tokio_io
tokio-native-tls tls?