Re: Dynamically allocated typedef'd array -- how to delete?

From:
"Sarath" <CSarath@gmail.com>
Newsgroups:
comp.lang.c++.moderated
Date:
Thu, 29 Mar 2007 16:19:55 CST
Message-ID:
<1175161716.855151.144370@r56g2000hsd.googlegroups.com>
On Mar 29, 1:29 am, "Risto Lankinen" <rlank...@gmail.com> wrote:

Hi!

Considering these declarations...

struct Res { /* Uses RAII, hence must be destructed appropriately!
*/ };
typedef Res Res_Array[256];

... and an allocation...

Res_Array *pArray = new Res_Array;

... then which of the following is the appropriate deletion:

delete pArray;
  -or-
delete[] pArray;

Cheers!

 - Risto -


Dear Risto Lankinen,

Seems it's hard to compile your code. As pArrayRepresents a pointer to
an array of 256 structure objects and the form of the new you
specified will invoke operator new(); and at the compilation time,
when the typedef expands, it will not match with the proto of the
above specified new. But if you properly invoke operator[]() it will
allow you to allocate the specified array.

Res_Array *pArray = new Res_Array[1];

The above code will compile. and you need to call the same form delete
(delete []pArray) operator

Still I wonder which compiler allowed to compile this code.

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