Cargo Features

float_eq = { version = "1.0.1", default-features = false, features = ["std", "num", "derive"] }
default = std

The std feature is set by default whenever float_eq is added without default-features = false somewhere in the dependency tree.

std default
num = num-complex
derive = float_eq_derive

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.

float_eq_derive derive?
num-complex num?