示例#1
0
 value perform(T &x) {
     return base.perform(&x);
 }
示例#2
0
 T &perform(value const &x) {
     return *base.perform(x);
 }
示例#3
0
 T *perform(value const &v) {
   return &dynamic_cast<T&>(*base.perform(v));
 }