Cargo Features

fwd_ad has no features set by default.

[dependencies]
fwd_ad = { version = "0.2.0", features = ["implicit-clone", "bench"] }
implicit-clone
bench = criterion

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

criterion bench?

Enables default (cargo_bench_support) of criterion ^0.3