| 1 | /*============================================================================= |
|---|
| 2 | Copyright (c) 2001-2007 Joel de Guzman |
|---|
| 3 | |
|---|
| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
|---|
| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
|---|
| 6 | ==============================================================================*/ |
|---|
| 7 | #include <iostream> |
|---|
| 8 | #include <algorithm> |
|---|
| 9 | #include <vector> |
|---|
| 10 | |
|---|
| 11 | #include <boost/phoenix/scope.hpp> |
|---|
| 12 | #include <boost/phoenix/core.hpp> |
|---|
| 13 | #include <boost/phoenix/operator.hpp> |
|---|
| 14 | #include <boost/phoenix/function.hpp> |
|---|
| 15 | |
|---|
| 16 | namespace lazy_stuff |
|---|
| 17 | { |
|---|
| 18 | using boost::phoenix::function; |
|---|
| 19 | |
|---|
| 20 | struct for_each_impl |
|---|
| 21 | { |
|---|
| 22 | typedef void result_type; |
|---|
| 23 | |
|---|
| 24 | template <typename C, typename F> |
|---|
| 25 | void operator()(C& c, F f) const |
|---|
| 26 | { |
|---|
| 27 | std::for_each(c.begin(), c.end(), f); |
|---|
| 28 | } |
|---|
| 29 | }; |
|---|
| 30 | |
|---|
| 31 | function<for_each_impl> const for_each = for_each_impl(); |
|---|
| 32 | |
|---|
| 33 | struct push_back_impl |
|---|
| 34 | { |
|---|
| 35 | typedef void result_type; |
|---|
| 36 | |
|---|
| 37 | template <typename C, typename T> |
|---|
| 38 | void operator()(C& c, T& x) const |
|---|
| 39 | { |
|---|
| 40 | c.push_back(x); |
|---|
| 41 | } |
|---|
| 42 | }; |
|---|
| 43 | |
|---|
| 44 | function<push_back_impl> const push_back = push_back_impl(); |
|---|
| 45 | } |
|---|
| 46 | |
|---|
| 47 | int |
|---|
| 48 | main() |
|---|
| 49 | { |
|---|
| 50 | { |
|---|
| 51 | using lazy_stuff::for_each; |
|---|
| 52 | using lazy_stuff::push_back; |
|---|
| 53 | |
|---|
| 54 | using boost::phoenix::lambda; |
|---|
| 55 | using boost::phoenix::arg_names::arg1; |
|---|
| 56 | using boost::phoenix::arg_names::arg2; |
|---|
| 57 | using boost::phoenix::local_names::_a; |
|---|
| 58 | |
|---|
| 59 | int x = 10; |
|---|
| 60 | std::vector<std::vector<int> > v(10); |
|---|
| 61 | |
|---|
| 62 | for_each(arg1, |
|---|
| 63 | lambda(_a = arg2) |
|---|
| 64 | [ |
|---|
| 65 | push_back(arg1, _a) |
|---|
| 66 | ] |
|---|
| 67 | ) |
|---|
| 68 | (v, x); |
|---|
| 69 | } |
|---|
| 70 | |
|---|
| 71 | return 0; |
|---|
| 72 | } |
|---|
| 73 | |
|---|
| 74 | |
|---|
