Cargo Features

unidok-repr has no features set by default.

[dependencies]
unidok-repr = { version = "0.2.0", features = ["serde-spans"] }
serde-spans = serde

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.

serde serde-spans?