Function syntax::attr::contains_feature_attr

pub fn contains_feature_attr(attrs: &[Attribute], feature_name: &str) -> bool

🔬 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?

Check if attrs contains an attribute like #![feature(feature_name)]. This will not perform any "sanity checks" on the form of the attributes.