C++ format macro / inline ostringstream

Question

I\'m trying to write a macro that would allow me to do something like: FORMAT(a << \"b\" << c << d), and the result would be a string -- the s

Answer 1

Here's a working solution:

#define FORMAT(items)                                                   \
   ((std::ostringstream&)(std::ostringstream() << std::dec << items)).str()

I don't quite understand the behavior of the first argument.