Re: Garbage Collection - The Trash Begins To Pile Up
Nemanja Trifunovic wrote:
Walter Bright wrote:
Nemanja Trifunovic wrote:
Walter Bright wrote:
You've a potential resource leak every time you use operator new, and a
potential dangling pointer problem every time you use RAII. For
example,
just store a reference to an RAII stack allocated std::string into a
global map.
And who would do that, and why?
Stuffing a symbol table, for one.
So to stuff a symbol table, you would create a string on the stack, and
put a reference to it to a global map? Sorry, I think you know better
than that.
That's true, who would ever code a bug into their program? <g>
Sure, the language allows such a thing,
but if we are going to talk about real life situations this is simply
not an issue.
I write real life programs. It's an issue.
You write as if nobody ever needs to use the free store. I find that
extraordinary.
Who said anything about not using free store? You imply it is a common
thing to create an object on the stack and put a pointer (or reference)
to it in a global map.
No, I said it was a common problem with using RAII objects.
*That* is what I don't consider a real life
issue. Where is the free store in the example you mention?
That was an example of a potential problem using RAII.
For the potential problem with the free store, just throw an exception:
Object *o = new Object();
foo(); // foo() throws an exception, o is now leaked
return o;
You've got such potential every time you use free store. And every time
you use RAII, you have the potential for a dangling pointer.
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