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// Boost.Function library
// Copyright Douglas Gregor 2004. Use, modification and
// distribution is subject to 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)
#include <boost/function.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/ref.hpp>
#define BOOST_CHECK BOOST_TEST
static int forty_two() { return 42; }
struct Seventeen
{
int operator()() const { return 17; }
};
struct ReturnInt
{
explicit ReturnInt(int value) : value(value) {}
int operator()() const { return value; }
int value;
};
bool operator==(const ReturnInt& x, const ReturnInt& y)
{ return x.value == y.value; }
bool operator!=(const ReturnInt& x, const ReturnInt& y)
{ return x.value != y.value; }
namespace contains_test {
struct ReturnIntFE
{
explicit ReturnIntFE(int value) : value(value) {}
int operator()() const { return value; }
int value;
};
bool function_equal(const ReturnIntFE& x, const ReturnIntFE& y)
{ return x.value == y.value; }
} // namespace contains_test
static void target_test()
{
boost::function0<int> f;
f = &forty_two;
BOOST_CHECK(*f.target<int (*)()>() == &forty_two);
BOOST_CHECK(!f.target<Seventeen>());
f = Seventeen();
BOOST_CHECK(!f.target<int (*)()>());
BOOST_CHECK(f.target<Seventeen>());
Seventeen this_seventeen;
f = boost::ref(this_seventeen);
BOOST_CHECK(!f.target<int (*)()>());
BOOST_CHECK(f.target<Seventeen>());
BOOST_CHECK(f.target<Seventeen>() == &this_seventeen);
const Seventeen const_seventeen = this_seventeen;
f = boost::ref(const_seventeen);
BOOST_CHECK(!f.target<int (*)()>());
BOOST_CHECK(f.target<const Seventeen>());
BOOST_CHECK(f.target<const Seventeen>() == &const_seventeen);
BOOST_CHECK(f.target<const volatile Seventeen>());
BOOST_CHECK(!f.target<Seventeen>());
BOOST_CHECK(!f.target<volatile Seventeen>());
}
static void equal_test()
{
boost::function0<int> f;
f = &forty_two;
BOOST_CHECK(f == &forty_two);
BOOST_CHECK(f != ReturnInt(17));
BOOST_CHECK(&forty_two == f);
BOOST_CHECK(ReturnInt(17) != f);
BOOST_CHECK(f.contains(&forty_two));
f = ReturnInt(17);
BOOST_CHECK(f != &forty_two);
BOOST_CHECK(f == ReturnInt(17));
BOOST_CHECK(f != ReturnInt(16));
BOOST_CHECK(&forty_two != f);
BOOST_CHECK(ReturnInt(17) == f);
BOOST_CHECK(ReturnInt(16) != f);
BOOST_CHECK(f.contains(ReturnInt(17)));
f = contains_test::ReturnIntFE(17);
BOOST_CHECK(f != &forty_two);
BOOST_CHECK(f == contains_test::ReturnIntFE(17));
BOOST_CHECK(f != contains_test::ReturnIntFE(16));
BOOST_CHECK(&forty_two != f);
BOOST_CHECK(contains_test::ReturnIntFE(17) == f);
BOOST_CHECK(contains_test::ReturnIntFE(16) != f);
BOOST_CHECK(f.contains(contains_test::ReturnIntFE(17)));
boost::function<int(void)> g;
g = &forty_two;
BOOST_CHECK(g == &forty_two);
BOOST_CHECK(g != ReturnInt(17));
BOOST_CHECK(&forty_two == g);
BOOST_CHECK(ReturnInt(17) != g);
g = ReturnInt(17);
BOOST_CHECK(g != &forty_two);
BOOST_CHECK(g == ReturnInt(17));
BOOST_CHECK(g != ReturnInt(16));
BOOST_CHECK(&forty_two != g);
BOOST_CHECK(ReturnInt(17) == g);
BOOST_CHECK(ReturnInt(16) != g);
}
static void ref_equal_test()
{
{
ReturnInt ri(17);
boost::function0<int> f = boost::ref(ri);
// References and values are equal
BOOST_CHECK(f == boost::ref(ri));
BOOST_CHECK(f == ri);
BOOST_CHECK(boost::ref(ri) == f);
BOOST_CHECK(!(f != boost::ref(ri)));
BOOST_CHECK(!(f != ri));
BOOST_CHECK(!(boost::ref(ri) != f));
BOOST_CHECK(ri == f);
BOOST_CHECK(!(ri != f));
// Values equal, references inequal
ReturnInt ri2(17);
BOOST_CHECK(f == ri2);
BOOST_CHECK(f != boost::ref(ri2));
BOOST_CHECK(boost::ref(ri2) != f);
BOOST_CHECK(!(f != ri2));
BOOST_CHECK(!(f == boost::ref(ri2)));
BOOST_CHECK(!(boost::ref(ri2) == f));
BOOST_CHECK(ri2 == f);
BOOST_CHECK(!(ri2 != f));
}
{
ReturnInt ri(17);
boost::function<int(void)> f = boost::ref(ri);
// References and values are equal
BOOST_CHECK(f == boost::ref(ri));
BOOST_CHECK(f == ri);
BOOST_CHECK(boost::ref(ri) == f);
BOOST_CHECK(!(f != boost::ref(ri)));
BOOST_CHECK(!(f != ri));
BOOST_CHECK(!(boost::ref(ri) != f));
BOOST_CHECK(ri == f);
BOOST_CHECK(!(ri != f));
// Values equal, references inequal
ReturnInt ri2(17);
BOOST_CHECK(f == ri2);
BOOST_CHECK(f != boost::ref(ri2));
BOOST_CHECK(boost::ref(ri2) != f);
BOOST_CHECK(!(f != ri2));
BOOST_CHECK(!(f == boost::ref(ri2)));
BOOST_CHECK(!(boost::ref(ri2) == f));
BOOST_CHECK(ri2 == f);
BOOST_CHECK(!(ri2 != f));
}
}
int main()
{
target_test();
equal_test();
ref_equal_test();
return boost::report_errors();
}
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