Cargo Features

[dependencies]
zachs18-stdx = { version = "0.1.3", default-features = false, features = ["std", "alloc"] }
default = std

The std feature is set by default whenever zachs18-stdx is added without default-features = false somewhere in the dependency tree.

std default = alloc
alloc std

zachs18-stdx has 3 features without comments.