Cargo Features

alt-enum has no features set by default.

[dependencies]
alt-enum = { version = "0.1.4", features = ["value_enum"] }
value_enum = value-enum

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.

value-enum value_enum?

Enables value-enum ^0.6.0