syntax_data: {"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                         let tys = match (self.adt_components)(adt_def, args) {
context_before:                     ty::Adt(adt_def, args) => {
context_after:                             Err(AlwaysRequiresDrop) => {