+ /**
+ Returns the opposite of IsOk().
+ You can use this function to test the validity of the stream as if
+ it was a pointer:
+
+ @code
+ bool DoSomething(wxInputStream& stream)
+ {
+ wxInt32 data;
+ if (!stream.Read(&data, 4))
+ return false;
+ ...
+ }
+ @endcode
+ */
+ bool operator!() const;
+