Compiler Error C2394

'type::operator operator': CLR/WinRT operator not valid. At least one parameter must be of the following types: 'T^', 'T^%', 'T^&', where T = 'type'

Remarks

An operator in a Windows Runtime or managed type did not have at least one parameter whose type is the same as the type of the operator return value.

Example

The following example generates C2394:

// C2394.cpp
// compile with: /clr /c
ref struct Y {
   static Y^ operator -(int i, char c);   // C2394

   // OK
   static Y^ operator -(Y^ hY, char c);
   // or
   static Y^ operator -(int i, Y^& rhY);
};