29     _Sp (_Tp::*__p_)();
32         : __p_(__p) {}  in mem_fun_t()
34         {return (__p->*__p_)();}  in operator()
41     _Sp (_Tp::*__p_)(_Ap);
44         : __p_(__p) {}  in mem_fun1_t()
46         {return (__p->*__p_)(__x);}  in operator()
65     _Sp (_Tp::*__p_)();
68         : __p_(__p) {}  in mem_fun_ref_t()
70         {return (__p.*__p_)();}  in operator()
77     _Sp (_Tp::*__p_)(_Ap);
80         : __p_(__p) {}  in mem_fun1_ref_t()
82         {return (__p.*__p_)(__x);}  in operator()
101     _Sp (_Tp::*__p_)() const;
104         : __p_(__p) {}  in const_mem_fun_t()
106         {return (__p->*__p_)();}  in operator()
113     _Sp (_Tp::*__p_)(_Ap) const;
116         : __p_(__p) {}  in const_mem_fun1_t()
118         {return (__p->*__p_)(__x);}  in operator()
137     _Sp (_Tp::*__p_)() const;
140         : __p_(__p) {}  in const_mem_fun_ref_t()
142         {return (__p.*__p_)();}  in operator()
149     _Sp (_Tp::*__p_)(_Ap) const;
152         : __p_(__p) {}  in const_mem_fun1_ref_t()
154         {return (__p.*__p_)(__x);}  in operator()