[][src]Constant syntax::feature_gate::ACTIVE_FEATURES

const ACTIVE_FEATURES: &'static [(&'static str, &'static str, Option<u32>, Option<Edition>, fn(_: &mut Features, _: Span))]
🔬 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?

Represents active features that are currently being implemented or currently being considered for addition/removal.