syntax_data: {"ast_node_type":"function","tokens":[{"end":98,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet: fn lit_to_mir_constant<'tcx>(tcx: TyCtxt<'tcx>, lit_input: LitToConstInput<'tcx>) -> Const<'tcx> {
context_before: #[instrument(skip(tcx, lit_input))]
context_after:     let LitToConstInput { lit, ty, neg } = lit_input;