syntax_data: {"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"hir::StructTailExpr::Base(base)"}]}
source_snippet:                                 hir::StructTailExpr::Base(base) => AdtExprBase::Base(FruInfo {
context_before:                             base: match base {
context_after:                                     base: self.mirror_expr(base),