Cargo Features

[dependencies]
curses-sys = { version = "6.0.0-2", default-features = false, features = ["panel", "extensions", "mouse", "wide"] }
default = extensions, mouse, wide

These default features are set whenever curses-sys is added without default-features = false somewhere in the dependency tree.

form menu panel
extensions default

Affects form::TYPE_IPV4

mouse default
wide default

Affects form::form_driver_w