Cargo Features

[dependencies]
also = { version = "0.1.0", default-features = false, features = ["std", "all", "nightly"] }
default = std

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

std default all?

Affects also::Also.and_run, also::Also.or_run

all = nightly, std
nightly all?

Affects also::Also.and_run, also::Also.or_run