[lug] [OT] C++ trick?

[Mike Romberg]

>>>>> " " == Scott Herod <herod at dimensional.com> writes:

     > Hello, I'm looking for C++ trick (mainly because it's pretty
     > late, and I'm getting tired of sending someone notes that the
     > function he's using is not in a standard header file).

     > I want to create a macro to replace "itoa( i, buf, size )"
     > basically with a function like:

     > string f ( int i ) { stringstream b; b << i << ends; return
     > b.str(); }


     > The following doesn't work because the operator<<() creates
     > ostreams which don't know about the str() function of
     > stringstreams.

     > #define itoa(i,buf,val) \
     > (stringstream().operator<<(i).operator<<(ends)).str()


     > Can someone suggest a trick?

  Not really much of a trick, but how about ostringstream?

#include <sstream>
#include <string>

std::string f(int i)
    {
    std::ostringstream os;
    // Not 100% sure but I think the ends is not needed
    // with a stringstream since a string is a vector of chars
    os << i << std::ends;
    return os.str();
    }

Mike Romberg (romberg at fsl.noaa.gov)