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 is what I use. It all fits into one tidy class definition in a header file.

update: major improvement to the code thanks to litb.

// makestring.h:

class MakeString
{
    public:
        std::stringstream stream;
        operator std::string() const { return stream.str(); }

        template
        MakeString& operator<<(T const& VAR) { stream << VAR; return *this; }
};

Here is how it is used:

string myString = MakeString() << a << "b" << c << d;