Cargo Features

[dependencies]
packinglist = { version = "0.3.0", default-features = false, features = ["std", "serde-std", "serde-nostd"] }
default = std

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

std default
serde-std

Enables serde

serde-nostd

Enables serde

PackingList has 4 features without comments.