“Permanent” std::setw

Question

Is there any way how to set std::setw manipulator (or its function width) permanently? Look at this:

#include 
#inc         


        

Answer 1

Well, it's not possible. No way to make it call .width each time again. But you can use boost, of course:

#include 
#include 
#include 
#include 
#include 

int main() {
    using namespace boost::lambda;
    int a[] = { 1, 2, 3, 4 };
    std::copy(a, a + 4, 
        boost::make_function_output_iterator( 
              var(std::cout) << std::setw(3) << _1)
        );
}

It does create its own functor, but it happens behind the scene :)