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

Subject: Re: [boost] [local] Help for the Alternatives section
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2011-03-26 19:46:55

AMDG

On 03/26/2011 04:27 PM, Michael Caisse wrote:
> #include <boost/phoenix/phoenix.hpp>
> #include <boost/phoenix/statement.hpp>
> #include <iostream>
> #include <vector>
> #include <algorithm>
>
> int main() {
>   double sum = 0.0;
>   int factor = 10;
>
>   using namespace boost::phoenix;
>   using namespace boost::phoenix::placeholders;
>
>   std::vector<double> v(3);
>   v[0] = 1.0; v[1] = 2.0; v[2] = 3.0;
>   std::for_each(v.begin(), v.end(), (
>     ref(sum) += factor * _1,
>     std::cout << "Summed: " << ref(sum) << "\n" )
>   );
>   return 0;
> }
>

This is incorrect.  std::cout << "Summed: " is evaluated
eagerly.

In Christ,
Steven Watanabe