Re: [Boost-users] Metaprogramming Question

On 2/9/2012 1:49 PM, Nat Linden wrote:

OURMACRO("some streaming expr " << value << ...);

that would stream arbitrary objects as in:

hidden_ostream_object << "some streaming expr " << value << ...;

His solution is like this:

template <typename FUNCTOR> void ourmacro_f(const FUNCTOR& f) { f(hidden_ostream_object); }

#define OURMACRO(EXPRESSION) (ourmacro_f(boost::lambda::_1 << EXPRESSION))\

How is that different from just using: #define OURMACRO(EXPRESSION) hidden_stream_object << EXPRESSION