Cargo Features

[dependencies]
eui48 = { version = "1.1.0", default-features = false, features = ["disp_hexstring", "serde_bytes", "rustc-serialize", "serde_json"] }
default = rustc-serialize

The rustc-serialize feature is set by default whenever eui48 is added without default-features = false somewhere in the dependency tree.

disp_hexstring
serde_bytes = serde

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.

rustc-serialize default
serde serde_bytes?
serde_json implicit feature

Enables serde_json

serde_json:

A JSON serialization file format