syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"self.const_to_pat(constant,"}]}
source_snippet:                 self.const_to_pat(constant, ct_ty, expr.hir_id, lit.span).kind
context_before:                 let constant = self.tcx.at(expr.span).lit_to_const(lit_input);
context_after:             }