What kind of C++ code is this?

Projects Programming
1

I have this peace of C++ code:

cbuf::cbuf(size_t size) :
    next(NULL), _size(size), 
    _buf(new char[size]), 
    _bufend(_buf + size), 
    _begin(_buf), 
    _end(_begin) {
}

It looks like some kind of delegate, it does compile but does not create a working program.
I'm not familiar with this kind of programming, how do I change it so that is works?

2

that's a member initializer list for a constructor of the cbuf class (that you should have somewhere)

it's somewhat the same as

 cbuf::cbuf(size_t size) {
  next = NULL;
  _size = size; 
  _buf = new char[size];
  _bufend = _buf + size; 
  _begin = _buf;
  _end = _begin;
}

but in a way that is better if you need to subclass

can't answer your question if we don't have context though...

3

A less cryptic (and less pedantic) explanation: When do we use Initializer List in C++? - GeeksforGeeks

4

did not feel (or at least did not mean to provide)my answer was pedantic if you mean this negatively.

5

Not directed at you at all. I just find https://en.cppreference.com/ to be highly pedantic and more concerned with formalisms of the C++ language specification than it is with helping people understand and use the features.

6

OK

well it's focused more on the specification (the reference as the name imply) than educating... so indeed may be not the best didactic link I could have posted

7

Thanks all; J-M-L explains it well enough for me.

8

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