21     Type old = x;  in operator ()()  local
23     return old;  in operator ()()
30     Type old = x;  in operator ()()  local
32     return old;  in operator ()()
39     Type old = x;  in operator ()()  local
41     return old;  in operator ()()
48     Type old = x;  in operator ()()  local
50     return old;  in operator ()()
57     Type old = x;  in operator ()()  local
59     return old;  in operator ()()
66     Type old = x;  in operator ()()  local
68     return old;  in operator ()()
75     Type old = x;  in operator ()()  local
77     return old;  in operator ()()
84     Type old = x;  in operator ()()  local
86     return old;  in operator ()()
93     Type old = x;  in operator ()()  local
95     return old;  in operator ()()
102     Type old = x;  in operator ()()  local
104     return old;  in operator ()()
111     Type old = x;  in operator ()()  local
113     return old;  in operator ()()
120     PairType old = x;  in operator ()()  local
123     return old;  in operator ()()
130     PairType old = x;  in operator ()()  local
133     return old;  in operator ()()