Cargo Features

[dependencies]
fieldless_enum_tools = { version = "0.2.0", default-features = false, features = ["std", "alloc", "serde", "criterion"] }
default = std

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

std default
alloc

Features from optional dependencies

serde implicit feature

Enables serde

serde:

A generic serialization/deserialization framework

criterion implicit feature

Enables criterion ^0.3

has to be normal dependecy because it dev-dependencies can't be optional