[][src]Function syntax::attr::allow_internal_unstable

pub fn allow_internal_unstable<'a>(
    attrs: &[Attribute],
    span_diagnostic: &'a Handler
) -> Option<impl Iterator<Item = Symbol> + 'a>
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.