117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2007 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#include <iostream>
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#include <cmath>
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#include <boost/detail/lightweight_test.hpp>
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#include <boost/phoenix/core.hpp>
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#include <boost/phoenix/operator.hpp>
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#include <boost/phoenix/function.hpp>
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using namespace boost::phoenix;
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using namespace boost::phoenix::arg_names;
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using namespace std;
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struct test_impl
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{
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typedef void result_type;
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void operator()() const
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{
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cout << "Test lazy functions...\n";
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}
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};
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function<test_impl> test;
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struct sqr_impl
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{
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template <typename Arg>
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struct result
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{
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typedef Arg type;
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};
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template <typename Arg>
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Arg operator()(Arg n) const
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{
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return n * n;
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}
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};
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function<sqr_impl> sqr;
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struct fact_impl
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{
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template <typename Arg>
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struct result
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{
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typedef Arg type;
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};
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template <typename Arg>
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Arg operator()(Arg n) const
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{
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return (n <= 0) ? 1 : n * (*this)(n-1);
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}
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};
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function<fact_impl> fact;
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struct pow_impl
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{
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template <typename Arg1, typename Arg2>
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struct result
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{
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typedef Arg1 type;
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};
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template <typename Arg1, typename Arg2>
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Arg1 operator()(Arg1 a, Arg2 b) const
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{
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return pow(a, b);
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}
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};
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function<pow_impl> power;
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struct add_impl
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{
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template <typename Arg1, typename Arg2, typename Arg3, typename Arg4>
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struct result
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{
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typedef Arg1 type;
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};
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template <typename Arg1, typename Arg2, typename Arg3, typename Arg4>
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Arg1 operator()(Arg1 a, Arg2 b, Arg3 c, Arg4 d) const
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{
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return a + b + c + d;
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}
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};
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function<add_impl> add;
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int
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main()
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{
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int i5 = 5;
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double d5 = 5, d3 = 3;
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test()();
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BOOST_TEST(sqr(arg1)(i5) == (i5*i5));
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BOOST_TEST(fact(4)() == 24);
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BOOST_TEST(fact(arg1)(i5) == 120);
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BOOST_TEST((int)power(arg1, arg2)(d5, d3) == (int)pow(d5, d3));
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BOOST_TEST((sqr(arg1) + 5)(i5) == ((i5*i5)+5));
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BOOST_TEST(add(arg1, arg1, arg1, arg1)(i5) == (5+5+5+5));
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int const ic5 = 5;
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// testing consts
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BOOST_TEST(sqr(arg1)(ic5) == (ic5*ic5));
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return boost::report_errors();
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}
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