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// Copyright (C) 2014 Andrzej Krzemienski.
//
// 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)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at: akrzemi1@gmail.com
#include "boost/optional/optional.hpp"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "boost/core/lightweight_test.hpp"
using boost::optional;
// testing types:
// X is convertible to Y
// ADeriv is convertible to ABase
struct X
{
int val;
explicit X(int v) : val(v) {}
};
struct Y
{
int yval;
Y(X const& x) : yval(x.val) {}
friend bool operator==(Y const& l, Y const& r) { return l.yval == r.yval; }
};
struct ABase
{
int val;
explicit ABase(int v) : val(v) {}
friend bool operator==(ABase const& l, ABase const& r) { return l.val == r.val; }
};
struct ADeriv : ABase
{
explicit ADeriv(int v) : ABase(v) {}
};
template <typename T, typename U>
void test_convert_optional_U_to_optional_T_for()
{
#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
{
optional<U> ou(U(8));
optional<T> ot1(ou);
BOOST_TEST(ot1);
BOOST_TEST(*ot1 == T(*ou));
}
#endif
#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
{
optional<U> ou(U(8));
optional<T> ot2;
ot2 = ou;
BOOST_TEST(ot2);
BOOST_TEST(*ot2 == T(*ou));
}
#endif
}
void test_convert_optional_U_to_optional_T()
{
test_convert_optional_U_to_optional_T_for<Y, X>();
test_convert_optional_U_to_optional_T_for<ABase, ADeriv>();
test_convert_optional_U_to_optional_T_for<long, short>();
test_convert_optional_U_to_optional_T_for<double, float>();
}
template <typename T, typename U>
void test_convert_U_to_optional_T_for()
{
U u(8);
optional<T> ot1(u);
BOOST_TEST(ot1);
BOOST_TEST(*ot1 == T(u));
optional<T> ot2;
ot2 = u;
BOOST_TEST(ot2);
BOOST_TEST(*ot2 == T(u));
}
void test_convert_U_to_optional_T()
{
test_convert_U_to_optional_T_for<Y, X>();
test_convert_U_to_optional_T_for<ABase, ADeriv>();
test_convert_U_to_optional_T_for<long, short>();
test_convert_U_to_optional_T_for<double, float>();
}
int main()
{
test_convert_optional_U_to_optional_T();
test_convert_U_to_optional_T();
return boost::report_errors();
}
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