syntax_data: {"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let &thir::PatRange { lo, hi, .. } = range.as_ref();
context_before:             thir::PatKind::Range(ref range) => {
context_after:                 lo.has_non_region_param() || hi.has_non_region_param()