Function syntax::parse::float_lit

pub fn float_lit(
    s: &str, 
    suffix: Option<Symbol>, 
    diag: Option<(Span, &Handler)>
) -> Option<LitKind>

🔬 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?