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