operator = must be overload as a member function NOTE2: An operator function must either be a member of a class or have at least one parameter ofclass type. //操作符重载,有一个最基本条件,就是一定有一个一元是一个自定义的C++类 //如果两个都是基本数据类型操作符重载是非法的 NOTE3: An ...
To declare a binary operator function as aglobal function, you must declare it in the form: ret-typeoperatorop(arg1,arg2) whereret-typeandopare as described for member operator functions andarg1andarg2are arguments.At least one of the arguments must be of class type. There is no restriction...
No, an overloaded binary operator must be a standalone non-member function taking two parameters, or a non-static member function taking one parameter. It cannot be a static member function. Igor Tandetnik Monday, October 6, 2014 1:24 PM On 10/3/2014 10:11 AM, webJose wrote: As...
Now, in order to support operator chaining, the assignment operator must return some value. The value that should be returned is a reference to theleft-hand sideof the assignment. Notice that the returned reference isnotdeclared const. This can be a bit confusing, because it allows you to w...
You have the wrong number of parameters in the operator definition. In addition, overload operators must use the defined operator name. The only exception is when you create a conversion operator, where the operator name matches the return type of the conversion. Duplicate overloads defined CS...
Operatorscanbeoverloaded Thedefinitionofoperator+fortheCircleclassisnearlythesameas memberfunctionadd Tooverloadthe+operatorfortheCircleclass Usethename+inplaceofthenameofafunctionname Usekeywordoperatorinfrontofthe+ Example: friendCircleoperator+(constCircle&aCircle,constCircle&aCircle2); ...
define the operator in such a way that either an argument to it or the return type from it (or both) is the same type as the class that defines it. Your overloaded operators must furthermore use the "Return" keyword to return their results, and they do not support an "Exit" ...
match is used. The opCmp method must be implemented to return aintin order to be considered by the compiler. If the method argument is to be considered larger than the object then the method should return a negative value. If they are supposed to be equal the return value should be 0....
brings a responsibility: The programmer must observe expectations. As an extreme example, the previous operator could have been defined to decrement the time value instead of incrementing it. However, people who read the code would still expect the value to be incremented by the+=operator. ...
If a binary operator is written as class member, one argument is implicit (this, pointing to the object itself ). The other argument must be provided explicitly. If the operator is defined as external function, you have to provide both arguments. ...