overloading

[mural]

hi everyone....

im new to this group... cheers to all.
k then can u suggest me how to overload the 2D subscript operator.
i get difficulty on passing the second arguement....

[Victor Bazarov]

Re: overloading

mural wrote:

k then can u suggest me how to overload the 2D subscript operator.
i get difficulty on passing the second arguement....

There is no "2D subscript operator". Two major solution strategies exist:
using a function call operator with two arguments or overloading the normal
subscript which returns a proxy object which in turn overloads its own
subscript operator that returns what you need. With both you can basically
go any number of dimensions. Look up the code in the archives. Use your
apparent experience on the 'Net to search http://groups.google.com/

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

[Phlip]

Re: overloading

mural wrote:

k then can u suggest me how to overload the 2D subscript operator.

Chat (k, u, etc.) works best in a chat client, because you can immediately
tell if the reader understands you, and if you need to write more.

USENET posts must be able to stand alone, to be read offline, and read by
people with alternative language skills. Always take the time to write
complete words and sentences here.

i get difficulty on passing the second arguement....

This FAQ entry discusses why that's not a good idea:

http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.11

As usual with verbiage that warns against doing something, it must hint how
to do it. "Don't smoke crack. If you do, don't inhale". etc!

--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!

[Jim Langston]

Re: overloading

"mural" <murali.cpp@gma il.comwrote in message
news:1156167364 .492424.310540@ i42g2000cwa.goo glegroups.com.. .

hi everyone....
>
im new to this group... cheers to all.
k then can u suggest me how to overload the 2D subscript operator.
i get difficulty on passing the second arguement....

I asked a similar question before, although I tend to use capitialization
(I'm) and actually spell out works (Okay, you).

Basically what I was shown, and have done, was to override the [] operator,
and it returns a sub object which also has the operator [] overridden.

My subject was:
"Can we override [][]?"

If you google for that and my name you should be able to find the thread
where this was discussed indepth along with caveats.

[Noah Roberts]

Re: overloading


mural wrote:

hi everyone....
>
im new to this group... cheers to all.
k then can u suggest me how to overload the 2D subscript operator.
i get difficulty on passing the second arguement....

This works...

QUOTE:

Cute in an "oh god don't ever do that" sort of way:

struct MagicInt {
// operator overloads, constructors, etc, to make this class behave
// as an integer.

};

std::pair<Magic Int, MagicIntoperato r , (const MagicInt &a, const
MagicInt& b) { return std::make_pair( a, b); }

class Array2d {
public:
value& operator[](const std::pair<Magic Int, MagicInt&a) {
// use a.first and a.second to find the value...
}

};

int main() {
Array2d M(X, Y);

for (MagicInt a = 0; a < X; ++a)
for (MagicInt b = 0; b < Y; ++b)
M[a, b] = i + j;

}

So, 'M[a, b]' is *implementable* , even if so brittlely that you'd never
want to use it. (For instance, you cannot say 'M[1, 2]'.)

Jack Saalweachter

[mural]

Re: overloading

yeah..!
thank u...
and i am new to groups...
hereafter i will try to eliminate that kind of posts...

Phlip wrote:

mural wrote:
>

k then can u suggest me how to overload the 2D subscript operator.

>
Chat (k, u, etc.) works best in a chat client, because you can immediately
tell if the reader understands you, and if you need to write more.
>
USENET posts must be able to stand alone, to be read offline, and read by
people with alternative language skills. Always take the time to write
complete words and sentences here.
>

i get difficulty on passing the second arguement....

>
This FAQ entry discusses why that's not a good idea:
>

http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.11

>
As usual with verbiage that warns against doing something, it must hint how
to do it. "Don't smoke crack. If you do, don't inhale". etc!
>
--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!

[mural]

Re: overloading

and my question is
" how can i overload a subscript operator with more than one dimension
like [][][].."

with regards
murali
Phlip wrote:

mural wrote:
>

k then can u suggest me how to overload the 2D subscript operator.

>
Chat (k, u, etc.) works best in a chat client, because you can immediately
tell if the reader understands you, and if you need to write more.
>
USENET posts must be able to stand alone, to be read offline, and read by
people with alternative language skills. Always take the time to write
complete words and sentences here.
>

i get difficulty on passing the second arguement....

>
This FAQ entry discusses why that's not a good idea:
>

http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.11

>
As usual with verbiage that warns against doing something, it must hint how
to do it. "Don't smoke crack. If you do, don't inhale". etc!
>
--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!

[Thomas J. Gritzan]

Re: overloading

mural schrieb:

and my question is
" how can i overload a subscript operator with more than one dimension
like [][][].."

Both Victor Bazarov and Jim Langston provided an answer. Just read.

And please don't top-post.

--
Thomas

[Default User]

Re: overloading

mural wrote:

yeah..!
thank u...
and i am new to groups...
hereafter i will try to eliminate that kind of posts...

Please don't top-post. Your replies belong following or interspersed
with properly trimmed quotes. See the majority of other posts in the
newsgroup, or the group FAQ list:
<http://www.parashift.c om/c++-faq-lite/how-to-post.html>



Brian