The c++ aggregation library allows you to aggregate a whole lot more than you can with regular C++. It allows functions and classes to be defined as aggregate functions, allowing them to be used in place of regular functions and classes.
The thing is that because aggregation in c++ is handled by the compiler rather than the programmer, it’s also quite flexible. For example, you can define functions that accept objects of a class type, but not objects of a non-class type. Thus, you can have functions and classes that can act in different ways, all with the same signature (or maybe even the same name).
So, what’s the difference between a regular function and an aggregate function? Aggregates are functions that take other functions as arguments, and when they are called, they are then passed an object of the same type as the arguments. An aggregate function takes a function call by value, but it returns a reference to the same function that the original function called. For example, let’s say you have a function with two arguments, m1() and m2().
Aggregates are often used to make common code easier to understand, but they can also be great for performance optimization. Aggregates take a function to be aggregated that has the same signature as the function you want to aggregate. Sometimes you need only one argument, sometimes two, but at least they look like they should be the same type.
Aggregates are great in that they reduce the possibility of errors. If the code calls aggregate function f1(m1) then if the original function passed m1 to f1 it doesn’t have to pass all the arguments it should. If you wanted to pass the arguments of a function passed to the original function, the code would look for the function that the original function called, and if it found it, it would pass the arguments of the function that it found to the original function.
I think this can be really helpful for any C++ programmer. When aggregating functions, you can pass variables in place of the arguments and they still work. If the original function passed variables, you could still pass them in place of the arguments.
This can be used to get a lot of the arguments passed to a function out of the function that you’re aggregating. For example, if you wanted to pass in the arguments to a recursive function, you could just pass in the arguments into the recursive function, then pass the recursive function the arguments. This will cause the recursive function to call itself recursively with the arguments, then pass the arguments to the recursive function.
Aggregation is useful for the same reason that passing arguments to a recursive function is useful to a recursive function. It lets you pass a bunch of arguments to a function that you can then pass in to another function.