oop - Function overloading with the only change in "uint32_t" & uint64_t" in pure virtual function in c++ -

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i've pair pure virtual function defined inside c++ class, i've overloaded. code snippet below::

virtual uint64_t abc::getvalue()=0;  virtual uint32_t abc::getvalue()=0;

here, difference in function signature return type of getval() "uint32_t" & "uint64_t"..

it's throwing compilation error can't overloaded.

plz me on this.

you can't overload based on return type, on parameter types. because overload chosen based on how function called, , function call doesn't specify expected return type.

options include:

  • give functions different names;
  • "return" value via reference parameter, rather return value;
  • add dummy parameter, different type each version, specify return type;
  • return "proxy" object that's convertible either type (although means you'll have single function, derived classes can't override 2 versions separately).

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