Hello all, A curiosity: On GCC compilers (but _only_ on GCC compilers) it is possible to combine Boost.Local and the non-standard GCC "expression statements" feature to implement lambda functions. In other words, it is possible to define a Boost.Local closure within a GCC expression statement: std::vector<int> v(3); v[0] = 1; v[1] = 2; v[2] = 3; int factor = 10; std::for_each(v.begin(), v.end(), LAMBDA(int x, const bind& factor) { std::cout << x * factor << std::endl; } LAMBDA_END ); This is just a curiosity because it is NOT standard C++03 and it will ONLY work with GCC compilers. #include <boost/local/function.hpp> #include <vector> #include <algorithm> #include <iostream> // WARNING: This macros only work on GCC!!! #define LAMBDA_WITH_RESULT(result_type, ...) \ ({ /* open GCC statement expression */ \ result_type BOOST_LOCAL_FUNCTION_PARAMS(__VA_ARGS__) #define LAMBDA(...) \ LAMBDA_WITH_RESULT(void, __VA_ARGS__) #define LAMBDA_END \ BOOST_LOCAL_FUNCTION_NAME(BOOST_PP_CAT(lambda, __LINE__)) \ BOOST_PP_CAT(lambda, __LINE__); \ }) /* close GCC statement expression */ int main() { std::vector<int> v(3); v[0] = 1; v[1] = 2; v[2] = 3; int factor = 10; std::for_each(v.begin(), v.end(), LAMBDA(int x, const bind& factor) { std::cout << x * factor << std::endl; } LAMBDA_END ); return 0; } I might mention this code example as a curiosity in Boost.Local docs, currently it's not mentioned there. Thanks. --Lorenzo