Cargo Features

simple-vector2d has no features set by default.

[dependencies]
simple-vector2d = { version = "0.1.4", features = ["serde-serial", "rustc-serialize"] }
serde-serial = serde, serde_derive

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.

rustc-serialize implicit feature
serde_derive serde-serial?
serde serde-serial?