Cargo Features

ra-ap-rustc_data_structures has no features set by default.

[dependencies]
ra-ap-rustc_data_structures = { version = "0.28.0", features = ["rustc_use_parallel_compiler"] }
rustc_use_parallel_compiler = rustc-rayon, rustc-rayon-core

Enables rustc-rayon of indexmap

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-rayon rustc_use_parallel_compiler?
rustc-rayon-core rustc_use_parallel_compiler?