syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"hir::StructTailExpr::DefaultFields(_)"}]}
source_snippet:                                         hir::StructTailExpr::DefaultFields(_) => {
context_before:                                     base: match base {
context_after:                                             AdtExprBase::DefaultFields(