Cargo Features

[dependencies]
strum = { version = "0.26.3", default-features = false, features = ["std", "derive", "phf"] }
default = std

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

std default
derive = strum_macros

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.

strum_macros derive?
phf implicit feature

Enables phf ^0.10

phf:

Runtime support for perfect hash function data structures