Re: [boost] [rfc] loop utility

Subject: Re: [boost] [rfc] loop utility
From: Thomas Heller (thom.heller_at_[hidden])
Date: 2013-01-31 04:58:28

On 01/31/2013 10:31 AM, Tim Blechmann wrote:
> hi all,
>
> since c++11 has lambda functions, writing functors is easier than never
> before ... so, i wonder, what do people think about a small utility
> function, that calls a functor N times?
>
> ruby:
> 10.times { puts 'hello world' }
>
> supercollider:
> 10.do { "hello world".postln }
>
> c++11/boost proposal:
> boost::loop(10, [] { printf("hello world\n"); });
> boost::loop(10, [](int index) { printf("hello %d\n, index); });
>
>
> personally, i find this coding style more elegant than for loops, as it
> avoids the visual noise of explicitly counting a loop variable ... not
> sure, if it is worth a separate library, maybe it could just be added to
> boost/utility ...
>
> thoughts?
This can already be done using the boost range library:

========8<========8<========8<========8<========8<========8<========
#include <boost/range/irange.hpp>
#include <boost/range/algorithm/for_each.hpp>

int main()
{
    boost::for_each(boost::irange(0, 10), [] (int) { std::cout << "hello 
world\n";});
    boost::for_each(boost::irange(0, 10), [] (int index) { std::cout << 
"hello world from " << index << "\n";});
}
========8<========8<========8<========8<========8<========8<========

>
> prototype available at github:
> https://github.com/timblechmann/boost_loop
>
> tim
>
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