On Sun, Feb 20, 2011 at 1:55 PM, Edward Diener <eldiener@tropicsoft.com> wrote:
Fair enough. But I believe some other proposed Boost libraries, besides my own TTI library, are using variadic macro syntax in their public interface. Why should they not do that and take advantage of pp-lib at the same time ?
For example, Boost.Local new syntax takes advantage of variadics. If variadics (using a couple of Edward's VMD library macros behind the scenes): #include <boost/local/function.hpp> #include <iostream> #include <sstream> #include <algorithm> #include <vector> int main () { std::ostringstream output; int BOOST_LOCAL_FUNCTION_PARAMS(int n, bool recursion, default false, bind& output) { int result = 0; if (n < 2 ) result = 1; else result = n * factorial(n - 1, true); // Recursive call. if (!recursion) output << result << " "; return result; } BOOST_LOCAL_FUNCTION_NAME(factorial) std::vector<int> v(3); v[0] = 1; v[1] = 4; v[2] = 7; std::for_each(v.begin(), v.end(), factorial); std::cout << output.str() << std::endl; return 0; } In any case (variadics or not): #include <boost/local/function.hpp> #include <iostream> #include <sstream> #include <algorithm> #include <vector> int main () { std::ostringstream output; int BOOST_LOCAL_FUNCTION_PARAMS( (int n) (bool recursion)(default false) (bind& output) ) { int result = 0; if (n < 2 ) result = 1; else result = n * factorial(n - 1, true); // Recursive call. if (!recursion) output << result << " "; return result; } BOOST_LOCAL_FUNCTION_NAME(factorial) std::vector<int> v(3); v[0] = 1; v[1] = 4; v[2] = 7; std::for_each(v.begin(), v.end(), factorial); std::cout << output.str() << std::endl; return 0; } P.S. I just go this to compile :)) -- Lorenzo