Re: [boost] Re: new initialization lib, any interest?

From: Ross Smith (r-smith_at_[hidden])
Date: 2002-10-08 02:20:58

On Tuesday, 08 October 2002 06:26, Rozental, Gennadiy wrote:
> > Why not make an iterator adaptor (initialization_iterator?)
> > that holds a list of values with which to initialize.  And
> > then pass it to any of the STL containers.  (I can post my
> > implementation if it's interesting):
> >
> > 	std::list<int> primes(
> > 		make_init_iterator<int>(2)(3)(5)(7)(11)(),
> > 		make_init_iterator<int>());
>
> I like this idea. But proposed interface look like a waste since all
> of the argument are know at compile time.
>
> I would rather preper:
>
> std::list<int> primes(
> 	make_init_iterator<int, mpl::ct_list<2,3,5,7,11> >(),
> 	make_init_iterator<int>());
>
> For exact syntax consult MPL list specification.

The big advantage of the (2)(3)(5) notation over both the <2,3,5> and 
the "2,3,5" forms is that it works for _any_ (copyable) type. "2,3,5" 
only works for numbers and strings (and anything else you explicitly 
code a special case for), and <2,3,5> only works for integers.

-- 
Ross Smith ......... r-smith_at_[hidden] ......... Auckland, New Zealand
"I'm deeply concerned about a leader who has ignored the United Nations
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