Cargo Features
pyo3-macros-backend has no features set by default.
[dependencies]
pyo3-macros-backend = { version = "0.23.1", features = ["experimental-async"] }- experimental-async
pyo3-macros-backend has 1 feature without comment.
Features from optional dependencies
Note: we use default-features = false for proc-macro related crates not to depend on proc-macro itself. See https://github.com/PyO3/pyo3/pull/810 for more.