Re: [boost] [local] Help for the Alternatives section

Subject: Re: [boost] [local] Help for the Alternatives section
From: Thomas Heller (thom.heller_at_[hidden])
Date: 2011-03-27 10:04:32

On Saturday, March 26, 2011 11:19:46 PM Lorenzo Caminiti wrote:
> Hello all,
> 
> I am updating Boost.Local docs and I could use a some help in getting
> the Alternatives section right
> 
http://svn.boost.org/svn/boost/sandbox/local/libs/local/doc/html/boost_local/Alternatives.html

I would really like to see the first row removed ...
All alternatives you describe are using C++ syntax ... I know what you mean. But 
all the examples use regular C++ syntax.

Another thing what i really wonder is: You write that local classes can not be 
passed as a template parameter.
I don't really get the difference between the local class and Boost.Local.
What about this:

int main() {
    double sum = 0.0;
    int factor = 10;

    struct add_impl {
        double & sum;
        int const& factor;
        add_impl(double sum, int factor) : sum(sum), factor(factor) {}

        void operator()(double num) const
        {
            sum += factor * num;
            std::clog << "Summed: " << sum << std::endl;
        }
    };

    boost::function<void(double)> add = add_impl(sum, factor);

    double nums[3] = {1, 2, 3};
    std::for_each(nums, nums + 3, add)
    return 0;
}

I would be happy if you sched some light on to why this isn't possible but why 
its possible with using your macros.