"Inside C #" note (11) operator overloading

Operator overloading is similar to the previous indexer in order to make the language itself easier to use directly, and also as a syntactic sugar.

One operator overload (Operator overloading)

The existence of operator overloading allows existing operators to be redefined and manipulated to manipulate user-defined data types. Operator overloading is only a syntactic sugar, because its essence is actually a call to a method and does not add new features to the language itself.

A) syntax for operator overloading

public static < return value >operator< operator > (< parameter 1>,< parameter 2> ...)

There are some rules:

Must be modified with public static

The type of the return value is not restricted, but it is not recommended to return a bool type.

The number of arguments depends on the nature of the overloaded operator, and if it is a unary operator, a parameter is also required for overloading, as well as $ two for two.

When you overload a unary operator, the type of the parameter must be the current class.

Overloading the two-tuple operator requires that the type of the first parameter is the current class, and the second parameter type does not have a limit.

b) operators that can be overloaded

Unary operators: +,-,!, ~,++,--, true,false

Binary operators: +,-, *,/,%,&,|,^,<<,>>,==,!=,>,<,>=,<=

c) equals cannot be overloaded, but if the two-tuple operator is overloaded, the corresponding combination operator, such as +=,-=, is also equivalent to being overloaded.

[], and () also cannot be overloaded.

d) in order to ensure the readability of the code, only when the actual need to reload the reload.

Learning materials: Inside C # by Tom Archer

"Inside C #" note (11) operator overloading