def else_(self, result_expr):
        result_expr = as_value_expr(result_expr)

        # Maintain immutability
        return SearchedCaseBuilder(cases=list(self.cases),
                                   results=list(self.results),
                                   default=result_expr)
Step the NFA from the states in clist past the current input ptr, to create next NFA state set nlist.
dataset/ETHPy150Open cloudera/ibis/ibis/expr/operations.py/SearchedCaseBuilder.else_--crossover with--dataset/ETHPy150Open blackberry/ALF/alf/fuzz/grammr2_crack.py/GrammarCracker._step