syntax_data: {"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                         if let ty::ConstKind::Unevaluated(_) = c.kind() {
context_before:                     let evaluate = |c: ty::Const<'tcx>| {
context_after:                             match crate::traits::try_evaluate_const(