| // bll_and_function.cpp - The Boost Lambda Library ----------------------- |
| // |
| // Copyright (C) 2000-2003 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi) |
| // Copyright (C) 2000-2003 Gary Powell (powellg@amazon.com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See |
| // accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // For more information, see www.boost.org |
| |
| // test using BLL and boost::function |
| |
| #include <boost/test/minimal.hpp> // see "Header Implementation Option" |
| |
| #include "boost/lambda/lambda.hpp" |
| |
| #include "boost/function.hpp" |
| |
| #include <vector> |
| #include <map> |
| #include <set> |
| #include <string> |
| |
| |
| using namespace boost::lambda; |
| |
| using namespace std; |
| |
| void test_function() { |
| |
| boost::function<int (int, int)> f; |
| f = _1 + _2; |
| |
| BOOST_CHECK(f(1, 2)== 3); |
| |
| int i=1; int j=2; |
| boost::function<int& (int&, int)> g = _1 += _2; |
| g(i, j); |
| BOOST_CHECK(i==3); |
| |
| |
| |
| int* sum = new int(); |
| *sum = 0; |
| boost::function<int& (int)> counter = *sum += _1; |
| counter(5); // ok, sum* = 5; |
| BOOST_CHECK(*sum == 5); |
| delete sum; |
| |
| // The next statement would lead to a dangling reference |
| // counter(3); // error, *sum does not exist anymore |
| |
| } |
| |
| |
| int test_main(int, char *[]) { |
| |
| test_function(); |
| |
| return 0; |
| } |
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