Cargo Features

[dependencies]
futures-intrusive = { version = "0.5.0", default-features = false, features = ["std", "alloc"] }
default = std

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

std default = alloc, parking_lot
alloc std

Enables alloc of futures-core

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.

parking_lot std