syntax_data: {"ast_node_type":"variable","tokens":[{"end":80,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let bits = parse_float_into_scalar(n, *fty, neg).unwrap_or_else(|| {
context_before:         (ast::LitKind::Float(n, _), ty::Float(fty)) => {
context_after:                 tcx.dcx().bug(format!("couldn't parse float literal: {:?}", lit_input.lit))