Type Definition syntax::ast::CrateConfig

type CrateConfig = HashSet<(Name, Option<Symbol>)>;

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

The set of MetaItems that define the compilation environment of the crate, used to drive conditional compilation