syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"FieldPat"}]}
source_snippet:                 FieldPat { field, pattern: *self.valtree_to_pat(val, ty) }
context_before:                 let ty = self.tcx.normalize_erasing_regions(self.typing_env, ty);
context_after:             })