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

When I took mrree's solution (the one marked "preferred", the one beautifully explained, and the one working perfectly for G++), I ran into problems with MSVC++: All strings built with this macro ended up empty.

Hours (and lots of scratching my head and asking a "reloaded" question here) later, I found out that the seekp() call was the culprit. I am not sure what MSVC++ does differently with that, but replacing

ostringstream().seekp( 0, ios_base::cur )

with cadabra's

ostringstream() << std::dec

works for MSVC++, too.