Cargo Features

[dependencies]
data_structure_traits = { version = "0.1.12", default-features = false, features = ["std", "hashmap_core"] }
default = std

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

std default

Features from optional dependencies

hashmap_core implicit feature

Enables hashmap_core

hashmap_core:

Implementation of HashMap and HashSet for no_std environments