Cargo Features

[dependencies]
f256 = { version = "0.2.0", default-features = false, features = ["std", "num-traits"] }
default = std

The std feature is set by default whenever f256 is added without default-features = false somewhere in the dependency tree.

std default

Features from optional dependencies

num-traits implicit feature

Enables num-traits

num-traits:

Numeric traits for generic mathematics