Cargo Features

[dependencies]
ux2 = { version = "0.8.5", default-features = false, features = ["128", "64", "32", "16", "8", "serde"] }
default = 8

The 8 feature is set by default whenever ux2 is added without default-features = false somewhere in the dependency tree.

128 = 64
64 128? = 32
32 64? = 16
16 32? = 8
8 default 16?

Features from optional dependencies

serde implicit feature

Enables serde

serde:

A generic serialization/deserialization framework