Re: "vector" compile error in VC2005
"Alex Blekhman" <xfkt@oohay.moc> wrote in message
news:eyctnKEHHHA.1240@TK2MSFTNGP03.phx.gbl...
"pango" wrote:
I'm a new user for VS2005,and before I use VC++6 ,below code can be
compiled
by VC6,but it can not be compiled by VC2005:
vector<int> v;
for(int * p = v.begin();p!=v.end();p++);
From some doc I know from VS2003 ,compiler does not treat
vector::begin()
return type as ptr,so I must rewrite my code lick this:
vector<int> v;
for(vector<int>::iterator p = v.begin();p!=v.end();p++);
My God,I had use VC6 for 4-5 years,and I hadn't used VS2003,so I didn't
know
this update,but in my many project I had written the code that treat
vector::begin() return type is ptr,and I also use the return value of
begin()
as a ptr to array,but I found the code would be crashed if it was
compiled
by VC2005.
It is big trouble for me,I like the new VC2005's IDE,but if I have to
rewrite all my code to fit new STL lib,the cost is too high.So is there a
middle course to solve my problem?(If there is not,I think I had to
still
use my old VC6)
There is no middle course for that. Treating iterators as pointers worked
in VC6 by accident. It's not guaranteed by the Standard that it should
work that way.
Basically true, but there is a kind of middle course. You can
write stuff like:
for (int *p = &*v.begin(); p != &*v.end(); p++)
and it will work with both V6 and V8. It's even conforming
code. But you do still have to sprinkle about quite a few
&* decorations to turn iterators into pointers.
Another solution is to license the source of our libraries
and define _HAS_TRADITIONAL_ITERATORS as 1. Then you can
continue to use the pointer iterators for vector (and string)
that you know and love. You can use the libraries with any
VC++ release from V6 through V8. But that costs $.
P.J. Plauger
Dinkumware, Ltd.
http://www.dinkumware.com