active class S { 
  public: 
     m () { ... } 
  private: 
     @S () {  // pseudo-constructor
           select { 
              01 -> m(); // external call 
              instructions ...
           || 
              accept m;  // accept internal method
              instructions ... 
           ||
              waituntil (date); // time-out
              instructions ... 
           ||
              default           // default
              instructions ... 
           } 
      } 
  };