89 lines
1.7 KiB
C++
89 lines
1.7 KiB
C++
// Boost.Function library
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// Copyright Douglas Gregor 2004.
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// Copyright 2005 Peter Dimov
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// Use, modification and distribution is subject to
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// the Boost Software License, Version 1.0.
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// (See 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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#include <boost/function.hpp>
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#include <boost/core/lightweight_test.hpp>
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static int forty_two()
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{
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return 42;
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}
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struct Seventeen
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{
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int operator()() const
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{
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return 17;
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}
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};
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bool operator==(const Seventeen&, const Seventeen&)
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{
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return true;
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}
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struct ReturnInt
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{
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explicit ReturnInt(int value) : value(value)
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{
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}
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int operator()() const
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{
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return value;
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}
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int value;
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};
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bool operator==(const ReturnInt& x, const ReturnInt& y)
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{
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return x.value == y.value;
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}
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bool operator!=(const ReturnInt& x, const ReturnInt& y)
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{
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return x.value != y.value;
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}
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int main()
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{
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boost::function0<int> fn;
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fn = &forty_two;
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BOOST_TEST( fn() == 42 );
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BOOST_TEST( fn.contains(&forty_two) );
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BOOST_TEST( !fn.contains( Seventeen() ) );
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BOOST_TEST( !fn.contains( ReturnInt(0) ) );
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BOOST_TEST( !fn.contains( ReturnInt(12) ) );
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fn = Seventeen();
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BOOST_TEST( fn() == 17 );
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BOOST_TEST( !fn.contains( &forty_two ) );
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BOOST_TEST( fn.contains( Seventeen() ) );
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BOOST_TEST( !fn.contains( ReturnInt(0) ) );
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BOOST_TEST( !fn.contains( ReturnInt(12) ) );
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fn = ReturnInt(12);
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BOOST_TEST( fn() == 12 );
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BOOST_TEST( !fn.contains( &forty_two ) );
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BOOST_TEST( !fn.contains( Seventeen() ) );
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BOOST_TEST( !fn.contains( ReturnInt(0) ) );
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BOOST_TEST( fn.contains( ReturnInt(12) ) );
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return boost::report_errors();
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}
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