syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"Box::new(Pat"}]}
source_snippet:         Box::new(Pat { kind, ty, span: self.span })
context_before:         let kind = PatKind::ExpandedConstant { subpattern: inlined_const_as_pat, def_id: uv.def };
context_after:     }