149 lines
2.8 KiB
C++
149 lines
2.8 KiB
C++
// phoenix_style_control_structures.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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// -----------------------------------------------------------------------
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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/lambda/if.hpp"
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#include "boost/lambda/loops.hpp"
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#include <iostream>
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#include <vector>
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#include <list>
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#include <algorithm>
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#include <cmath>
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#include <cassert>
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#include <functional>
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using namespace boost::lambda;
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using namespace std;
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// If-else, while, do-while, for statements
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int test_main(int, char *[]) {
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vector<int> v;
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v.clear();
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v.push_back(1);
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v.push_back(2);
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v.push_back(3);
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v.push_back(4);
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v.push_back(5);
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v.push_back(6);
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v.push_back(7);
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v.push_back(8);
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v.push_back(9);
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v.push_back(10);
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int sum = 0;
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//////////////////////////////////
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for_each(v.begin(), v.end(),
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if_(_1 > 3 && _1 <= 8)
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[
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sum += _1
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]
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);
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BOOST_CHECK(sum == 4+5+6+7+8);
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int gt = 0, eq = 0, lt = 0;
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//////////////////////////////////
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for_each(v.begin(), v.end(),
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if_(_1 > 5)
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[
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++var(gt)
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]
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.else_
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[
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if_(_1 == 5)
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[
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++var(eq)
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]
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.else_
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[
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++var(lt)
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]
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]
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);
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BOOST_CHECK(lt==4);
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BOOST_CHECK(eq==1);
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BOOST_CHECK(gt==5);
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vector<int> t = v;
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int counta = 0;
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int countb = 0;
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//////////////////////////////////
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for_each(v.begin(), v.end(),
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(
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while_(_1--)
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[
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++var(counta)
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],
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++var(countb)
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)
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);
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BOOST_CHECK(counta == 55);
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BOOST_CHECK(countb == 10);
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v = t;
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counta = 0; countb = 0;
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//////////////////////////////////
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for_each(v.begin(), v.end(),
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(
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do_
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[
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++var(counta)
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]
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.while_(_1--),
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++var(countb)
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)
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);
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BOOST_CHECK(counta == (2+11)*10/2);
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BOOST_CHECK(countb == 10);
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v = t;
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counta = 0; countb = 0;
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//////////////////////////////////
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int iii;
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for_each(v.begin(), v.end(),
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(
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for_(var(iii) = 0, var(iii) < _1, ++var(iii))
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[
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++var(counta)
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],
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++var(countb)
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)
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);
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BOOST_CHECK(counta == (1+10)*10/2);
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BOOST_CHECK(countb == 10);
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v = t;
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return 0;
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}
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