for_each function and operator()

[George2]

Hello everyone,


I can not find related information in MSDN, so I want to confirm here,
that,

the implementation of for_each is something like,

template <class A, class BB for_each (A begin, A end, B Func)
{
while (begin != end) Func(*begin++);
return Func;
}

So, operator(*A) of class Func will be invoked? Right?


thanks in advance,
George

[Rolf Magnus]

Re: for_each function and operator()

George2 wrote:

Hello everyone,
>
>
I can not find related information in MSDN, so I want to confirm here,
that,
>
the implementation of for_each is something like,
>

template <class A, class BB for_each (A begin, A end, B Func)
{
    while (begin != end) Func(*begin++);
    return Func;
}

>
So, operator(*A) of class Func will be invoked? Right?

Yes.

[Victor Bazarov]

Re: for_each function and operator()

George2 wrote:

I can not find related information in MSDN, so I want to confirm here,
that,
>
the implementation of for_each is something like,
>

template <class A, class BB for_each (A begin, A end, B Func)
{
   while (begin != end) Func(*begin++);
   return Func;
}

>
So, operator(*A) of class Func will be invoked? Right?

If 'B' is a class, then yes, operator(). If 'B' is a function type,
then the function 'Func' will be called.

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

[terminator]

Re: for_each function and operator()

On Dec 3, 4:30 pm, George2 <george4acade.. .@yahoo.comwrot e:

Hello everyone,
>
I can not find related information in MSDN, so I want to confirm here,
that,

if your tools are not outdated you can just right click on what you
have typed and select 'go to definition'.

>
the implementation of for_each is something like,
>

template <class A, class BB for_each (A begin, A end, B Func)
{
    while (begin != end) Func(*begin++);
    return Func;}
>

>

MS actualy devices a for loop instead of while and uses preincrement(+
+it) operation which results in more optimized and readable
implementation.


regards,
FM.