Cargo Features

[dependencies]
regen-lang = { version = "0.0.7", default-features = false, features = ["clap"] }
default = clap

The clap feature is set by default whenever regen-lang is added without default-features = false somewhere in the dependency tree.

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.

clap default

Required by the regen binary