Cargo Features

piechart has no features set by default.

[dependencies]
piechart = { version = "1.0.0", features = ["cli"] }
cli = clap

Required by the binary

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 cli?

Enables clap ^3.0.0-beta.2