[][src]Function syntax::ext::tt::macro_rules::is_legal_fragment_specifier

fn is_legal_fragment_specifier(
    sess: &ParseSess,
    features: &Features,
    attrs: &[Attribute],
    frag_name: &str,
    frag_span: Span
) -> 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?