Re: [boost] [rfc] loop utility

Subject: Re: [boost] [rfc] loop utility
From: Tim Blechmann (tim_at_[hidden])
Date: 2013-01-31 06:16:09

hi thomas & andrey,

>> > 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<========
> IMHO, a regular loop looks simpler than either of these variants:
> 
>   for (int i = 0; i < 10; ++i)
>     std::cout << "hello world from " << i << "\n";
> 
> also, I guess this should also work:
> 
>   for (auto i: boost::irange(0, 10))
>     std::cout << "hello world from " << i << "\n";

of course, these variants all work, though they have the visual noise,
that i was referring to:

a: boost::for_each(boost::irange(0, X),
b: for (int i = 0; i < X; ++i)
c: for (auto i: boost::irange(0, X))
d: for (auto i: boost::times(X))
e: boost::loop (X,

or if one uses namespace boost:

a: for_each(irange(0, X),
b: for (int i = 0; i < X; ++i)
c: for (auto i: irange(0, X))
d: for (auto i: times(X))
e: loop (X,

in both cases my proposal is the most compact one, though still not as
compact as "X.do". using a lot of higher-level languages these days,
writing loops in c++ just feels too verbose for this century ...
range-based for loops avoid the manual handling of iterators ...

iac, if we want to do something N times, we just want to loop without
thinking about integer ranges or incrementing integers ;)

cheers, tim