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optional/test/optional_test_ref_portable_minimum.cpp
Josh Soref 29dd9187ec spelling: convertibility 
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
2023-07-11 00:39:13 +02:00

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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 BOOST_BORLANDC
#pragma hdrstop
#endif
#include "boost/core/addressof.hpp"
#include "boost/core/enable_if.hpp"
#include "boost/core/lightweight_test.hpp"
#include "testable_classes.hpp"
using boost::optional;
using boost::none;
struct CountingClass
{
static int count;
static int assign_count;
CountingClass() { ++count; }
CountingClass(const CountingClass&) { ++count; }
CountingClass& operator=(const CountingClass&) { ++assign_count; return *this; }
~CountingClass() { ++count; }
};
int CountingClass::count = 0;
int CountingClass::assign_count = 0;
void test_no_object_creation()
{
BOOST_TEST_EQ(0, CountingClass::count);
BOOST_TEST_EQ(0, CountingClass::assign_count);
{
CountingClass v1, v2;
optional<CountingClass&> oA(v1);
optional<CountingClass&> oB;
optional<CountingClass&> oC = oA;
oB = oA;
*oB = v2;
oC = none;
oC = optional<CountingClass&>(v2);
oB = none;
oA = oB;
}
BOOST_TEST_EQ(4, CountingClass::count);
BOOST_TEST_EQ(1, CountingClass::assign_count);
}
template <typename T>
typename boost::enable_if< has_arrow<T> >::type
test_arrow_const()
{
const typename concrete_type_of<T>::type v(2);
optional<const T&> o(v);
BOOST_TEST(o);
BOOST_TEST_EQ(o->val(), 2);
BOOST_TEST(boost::addressof(o->val()) == boost::addressof(v.val()));
}
template <typename T>
typename boost::disable_if< has_arrow<T> >::type
test_arrow_const()
{
}
template <typename T>
typename boost::enable_if< has_arrow<T> >::type
test_arrow_noconst_const()
{
typename concrete_type_of<T>::type v(2);
optional<const T&> o(v);
BOOST_TEST(o);
BOOST_TEST_EQ(o->val(), 2);
BOOST_TEST(boost::addressof(o->val()) == boost::addressof(v.val()));
v.val() = 1;
BOOST_TEST(o);
BOOST_TEST_EQ(o->val(), 1);
BOOST_TEST_EQ(v.val(), 1);
BOOST_TEST(boost::addressof(o->val()) == boost::addressof(v.val()));
}
template <typename T>
typename boost::disable_if< has_arrow<T> >::type
test_arrow_noconst_const()
{
}
template <typename T>
typename boost::enable_if< has_arrow<T> >::type
test_arrow()
{
typename concrete_type_of<T>::type v(2);
optional<T&> o(v);
BOOST_TEST(o);
BOOST_TEST_EQ(o->val(), 2);
BOOST_TEST(boost::addressof(o->val()) == boost::addressof(v.val()));
v.val() = 1;
BOOST_TEST(o);
BOOST_TEST_EQ(o->val(), 1);
BOOST_TEST_EQ(v.val(), 1);
BOOST_TEST(boost::addressof(o->val()) == boost::addressof(v.val()));
o->val() = 3;
BOOST_TEST(o);
BOOST_TEST_EQ(o->val(), 3);
BOOST_TEST_EQ(v.val(), 3);
BOOST_TEST(boost::addressof(o->val()) == boost::addressof(v.val()));
}
template <typename T>
typename boost::disable_if< has_arrow<T> >::type
test_arrow()
{
}
template <typename T>
void test_not_containing_value_for()
{
optional<T&> o1;
optional<T&> o2 = none;
optional<T&> o3 = o1;
BOOST_TEST(!o1);
BOOST_TEST(!o2);
BOOST_TEST(!o3);
BOOST_TEST(o1 == none);
BOOST_TEST(o2 == none);
BOOST_TEST(o3 == none);
}
template <typename T>
void test_direct_init_for_const()
{
const typename concrete_type_of<T>::type v(2);
optional<const T&> o(v);
BOOST_TEST(o);
BOOST_TEST(o != none);
BOOST_TEST(boost::addressof(*o) == boost::addressof(v));
BOOST_TEST_EQ(val(*o), val(v));
BOOST_TEST_EQ(val(*o), 2);
}
template <typename T>
void test_direct_init_for_noconst_const()
{
typename concrete_type_of<T>::type v(2);
optional<const T&> o(v);
BOOST_TEST(o);
BOOST_TEST(o != none);
BOOST_TEST(boost::addressof(*o) == boost::addressof(v));
BOOST_TEST_EQ(val(*o), val(v));
BOOST_TEST_EQ(val(*o), 2);
val(v) = 9;
BOOST_TEST(boost::addressof(*o) == boost::addressof(v));
BOOST_TEST_EQ(val(*o), val(v));
BOOST_TEST_EQ(val(*o), 9);
BOOST_TEST_EQ(val(v), 9);
}
template <typename T>
void test_direct_init_for()
{
typename concrete_type_of<T>::type v(2);
optional<T&> o(v);
BOOST_TEST(o);
BOOST_TEST(o != none);
BOOST_TEST(boost::addressof(*o) == boost::addressof(v));
BOOST_TEST_EQ(val(*o), val(v));
BOOST_TEST_EQ(val(*o), 2);
val(v) = 9;
BOOST_TEST(boost::addressof(*o) == boost::addressof(v));
BOOST_TEST_EQ(val(*o), val(v));
BOOST_TEST_EQ(val(*o), 9);
BOOST_TEST_EQ(val(v), 9);
val(*o) = 7;
BOOST_TEST(boost::addressof(*o) == boost::addressof(v));
BOOST_TEST_EQ(val(*o), val(v));
BOOST_TEST_EQ(val(*o), 7);
BOOST_TEST_EQ(val(v), 7);
}
template <typename T, typename U>
void test_clearing_the_value()
{
typename concrete_type_of<T>::type v(2);
optional<U&> o1(v), o2(v);
BOOST_TEST(o1);
BOOST_TEST(o1 != none);
BOOST_TEST(o2);
BOOST_TEST(o2 != none);
o1 = none;
BOOST_TEST(!o1);
BOOST_TEST(o1 == none);
BOOST_TEST(o2);
BOOST_TEST(o2 != none);
BOOST_TEST_EQ(val(*o2), 2);
BOOST_TEST(boost::addressof(*o2) == boost::addressof(v));
BOOST_TEST_EQ(val(v), 2);
}
template <typename T, typename U>
void test_equality()
{
typename concrete_type_of<T>::type v1(1), v2(2), v2_(2), v3(3);
optional<U&> o1(v1), o2(v2), o2_(v2_), o3(v3), o3_(v3), oN, oN_;
// o2 and o2_ point to different objects; o3 and o3_ point to the same object
BOOST_TEST(oN == oN);
BOOST_TEST(oN == oN_);
BOOST_TEST(oN_ == oN);
BOOST_TEST(o1 == o1);
BOOST_TEST(o2 == o2);
BOOST_TEST(o2 == o2_);
BOOST_TEST(o2_ == o2);
BOOST_TEST(o3 == o3);
BOOST_TEST(o3 == o3_);
BOOST_TEST(!(oN == o1));
BOOST_TEST(!(o1 == oN));
BOOST_TEST(!(o2 == o1));
BOOST_TEST(!(o2 == oN));
BOOST_TEST(!(oN != oN));
BOOST_TEST(!(oN != oN_));
BOOST_TEST(!(oN_ != oN));
BOOST_TEST(!(o1 != o1));
BOOST_TEST(!(o2 != o2));
BOOST_TEST(!(o2 != o2_));
BOOST_TEST(!(o2_ != o2));
BOOST_TEST(!(o3 != o3));
BOOST_TEST(!(o3 != o3_));
BOOST_TEST( (oN != o1));
BOOST_TEST( (o1 != oN));
BOOST_TEST( (o2 != o1));
BOOST_TEST( (o2 != oN));
}
template <typename T, typename U>
void test_order()
{
typename concrete_type_of<T>::type v1(1), v2(2), v2_(2), v3(3);
optional<U&> o1(v1), o2(v2), o2_(v2_), o3(v3), o3_(v3), oN, oN_;
// o2 and o2_ point to different objects; o3 and o3_ point to the same object
BOOST_TEST(!(oN < oN));
BOOST_TEST(!(oN < oN_));
BOOST_TEST(!(oN_ < oN));
BOOST_TEST(!(o1 < o1));
BOOST_TEST(!(o2 < o2));
BOOST_TEST(!(o2 < o2_));
BOOST_TEST(!(o2_ < o2));
BOOST_TEST(!(o3 < o3));
BOOST_TEST(!(o3 < o3_));
BOOST_TEST( (oN <= oN));
BOOST_TEST( (oN <= oN_));
BOOST_TEST( (oN_ <= oN));
BOOST_TEST( (o1 <= o1));
BOOST_TEST( (o2 <= o2));
BOOST_TEST( (o2 <= o2_));
BOOST_TEST( (o2_ <= o2));
BOOST_TEST( (o3 <= o3));
BOOST_TEST( (o3 <= o3_));
BOOST_TEST(!(oN > oN));
BOOST_TEST(!(oN > oN_));
BOOST_TEST(!(oN_ > oN));
BOOST_TEST(!(o1 > o1));
BOOST_TEST(!(o2 > o2));
BOOST_TEST(!(o2 > o2_));
BOOST_TEST(!(o2_ > o2));
BOOST_TEST(!(o3 > o3));
BOOST_TEST(!(o3 > o3_));
BOOST_TEST( (oN >= oN));
BOOST_TEST( (oN >= oN_));
BOOST_TEST( (oN_ >= oN));
BOOST_TEST( (o1 >= o1));
BOOST_TEST( (o2 >= o2));
BOOST_TEST( (o2 >= o2_));
BOOST_TEST( (o2_ >= o2));
BOOST_TEST( (o3 >= o3));
BOOST_TEST( (o3 >= o3_));
BOOST_TEST( (oN < o1));
BOOST_TEST( (oN_ < o1));
BOOST_TEST( (oN < o2));
BOOST_TEST( (oN_ < o2));
BOOST_TEST( (oN < o2_));
BOOST_TEST( (oN_ < o2_));
BOOST_TEST( (oN < o3));
BOOST_TEST( (oN_ < o3));
BOOST_TEST( (oN < o3_));
BOOST_TEST( (oN_ < o3_));
BOOST_TEST( (o1 < o2));
BOOST_TEST( (o1 < o2_));
BOOST_TEST( (o1 < o3));
BOOST_TEST( (o1 < o3_));
BOOST_TEST( (o2 < o3));
BOOST_TEST( (o2_ < o3));
BOOST_TEST( (o2 < o3_));
BOOST_TEST( (o2_ < o3_));
BOOST_TEST( (oN <= o1));
BOOST_TEST( (oN_ <= o1));
BOOST_TEST( (oN <= o2));
BOOST_TEST( (oN_ <= o2));
BOOST_TEST( (oN <= o2_));
BOOST_TEST( (oN_ <= o2_));
BOOST_TEST( (oN <= o3));
BOOST_TEST( (oN_ <= o3));
BOOST_TEST( (oN <= o3_));
BOOST_TEST( (oN_ <= o3_));
BOOST_TEST( (o1 <= o2));
BOOST_TEST( (o1 <= o2_));
BOOST_TEST( (o1 <= o3));
BOOST_TEST( (o1 <= o3_));
BOOST_TEST( (o2 <= o3));
BOOST_TEST( (o2_ <= o3));
BOOST_TEST( (o2 <= o3_));
BOOST_TEST( (o2_ <= o3_));
BOOST_TEST(!(oN > o1));
BOOST_TEST(!(oN_ > o1));
BOOST_TEST(!(oN > o2));
BOOST_TEST(!(oN_ > o2));
BOOST_TEST(!(oN > o2_));
BOOST_TEST(!(oN_ > o2_));
BOOST_TEST(!(oN > o3));
BOOST_TEST(!(oN_ > o3));
BOOST_TEST(!(oN > o3_));
BOOST_TEST(!(oN_ > o3_));
BOOST_TEST(!(o1 > o2));
BOOST_TEST(!(o1 > o2_));
BOOST_TEST(!(o1 > o3));
BOOST_TEST(!(o1 > o3_));
BOOST_TEST(!(o2 > o3));
BOOST_TEST(!(o2_ > o3));
BOOST_TEST(!(o2 > o3_));
BOOST_TEST(!(o2_ > o3_));
BOOST_TEST(!(oN >= o1));
BOOST_TEST(!(oN_ >= o1));
BOOST_TEST(!(oN >= o2));
BOOST_TEST(!(oN_ >= o2));
BOOST_TEST(!(oN >= o2_));
BOOST_TEST(!(oN_ >= o2_));
BOOST_TEST(!(oN >= o3));
BOOST_TEST(!(oN_ >= o3));
BOOST_TEST(!(oN >= o3_));
BOOST_TEST(!(oN_ >= o3_));
BOOST_TEST(!(o1 >= o2));
BOOST_TEST(!(o1 >= o2_));
BOOST_TEST(!(o1 >= o3));
BOOST_TEST(!(o1 >= o3_));
BOOST_TEST(!(o2 >= o3));
BOOST_TEST(!(o2_ >= o3));
BOOST_TEST(!(o2 >= o3_));
BOOST_TEST(!(o2_ >= o3_));
BOOST_TEST(!(o1 < oN));
BOOST_TEST(!(o1 < oN_));
BOOST_TEST(!(o2 < oN));
BOOST_TEST(!(o2 < oN_));
BOOST_TEST(!(o2_ < oN));
BOOST_TEST(!(o2_ < oN_));
BOOST_TEST(!(o3 < oN));
BOOST_TEST(!(o3 < oN_));
BOOST_TEST(!(o3_ < oN));
BOOST_TEST(!(o3_ < oN_));
BOOST_TEST(!(o2 < oN));
BOOST_TEST(!(o2_ < oN_));
BOOST_TEST(!(o3 < oN));
BOOST_TEST(!(o3_ < oN_));
BOOST_TEST(!(o3 < oN));
BOOST_TEST(!(o3 < oN_));
BOOST_TEST(!(o3_ < oN));
BOOST_TEST(!(o3_ < oN_));
}
template <typename T, typename U>
void test_swap()
{
typename concrete_type_of<T>::type v1(1), v2(2);
optional<U&> o1(v1), o1_(v1), o2(v2), o2_(v2), oN, oN_;
swap(o1, o1);
BOOST_TEST(o1);
BOOST_TEST(boost::addressof(*o1) == boost::addressof(v1));
swap(oN, oN_);
BOOST_TEST(!oN);
BOOST_TEST(!oN_);
swap(o1, oN);
BOOST_TEST(!o1);
BOOST_TEST(oN);
BOOST_TEST(boost::addressof(*oN) == boost::addressof(v1));
swap(oN, o1);
BOOST_TEST(!oN);
BOOST_TEST(o1);
BOOST_TEST(boost::addressof(*o1) == boost::addressof(v1));
swap(o1_, o2_);
BOOST_TEST(o1_);
BOOST_TEST(o2_);
BOOST_TEST(boost::addressof(*o1_) == boost::addressof(v2));
BOOST_TEST(boost::addressof(*o2_) == boost::addressof(v1));
}
template <typename T, typename U>
void test_convertibility_of_compatible_reference_types()
{
typename concrete_type_of<T>::type v1(1);
optional<T&> oN, o1(v1);
optional<U&> uN(oN), u1(o1);
BOOST_TEST(!uN);
BOOST_TEST(u1);
BOOST_TEST(boost::addressof(*u1) == boost::addressof(*o1));
uN = o1;
u1 = oN;
BOOST_TEST(!u1);
BOOST_TEST(uN);
BOOST_TEST(boost::addressof(*uN) == boost::addressof(*o1));
}
template <typename T>
void test_optional_ref()
{
test_not_containing_value_for<T>();
test_direct_init_for<T>();
test_clearing_the_value<T, T>();
test_arrow<T>();
test_equality<T, T>();
test_order<T, T>();
test_swap<T, T>();
}
template <typename T>
void test_optional_const_ref()
{
test_not_containing_value_for<const T>();
test_direct_init_for_const<T>();
test_direct_init_for_noconst_const<T>();
test_clearing_the_value<const T, const T>();
test_clearing_the_value<T, const T>();
test_arrow_const<T>();
test_arrow_noconst_const<T>();
test_equality<const T, const T>();
test_equality<T, const T>();
test_order<const T, const T>();
test_order<T, const T>();
test_swap<const T, const T>();
test_swap<T, const T>();
}
int main()
{
test_optional_ref<int>();
test_optional_ref<ScopeGuard>();
test_optional_ref<Abstract>();
test_optional_ref< optional<int> >();
test_optional_const_ref<int>();
test_optional_const_ref<ScopeGuard>();
test_optional_const_ref<Abstract>();
test_optional_const_ref< optional<int> >();
test_convertibility_of_compatible_reference_types<int, const int>();
test_convertibility_of_compatible_reference_types<Impl, Abstract>();
test_convertibility_of_compatible_reference_types<Impl, const Abstract>();
test_convertibility_of_compatible_reference_types<const Impl, const Abstract>();
test_convertibility_of_compatible_reference_types<optional<int>, const optional<int> >();
return boost::report_errors();
}
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