670 B
670 B
The void type
In ++C, there's an integrated void type. The void type is an empty structure, and has a special way of passing around: it doesn't get passed around, since there's only one possible value of void. It can be converted from any value, and to any value. The conversion of a void to a type results in a value of that type, filled with zeroes.
The null constant
This constant is the only possible value of null. It can be returned by void functions. null can be used to initialize a value to a zeroed-out version of itself. If a struct wants to implement a different default value, it should implement a conversion from void to itself.