syntax_data: {"ast_node_type":"other","tokens":[{"end":27,"kind":"keyword","start":0,"text":"Ok(Ok(c))"}]}
source_snippet:             Ok(Ok(c)) => c,
context_before:         let valtree = match self.tcx.const_eval_resolve_for_typeck(typing_env, uv, self.span) {
context_after:             Err(ErrorHandled::Reported(_, _)) => {