feedc0de/boost_optional
1
0
Fork 0
forked from boostorg/optional
Code Pull Requests Activity

Fix issue #98

Browse Source
This commit is contained in:
Andrzej Krzemienski
2021-11-20 02:00:30 +01:00
parent 21253ea63a
commit 7dd512a019
47 changed files with 198 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
test/optional_test_convert_assign.cpp Normal file
View File

@ -0,0 +1,57 @@
// Copyright (C) 2021 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"
#include "boost/core/lightweight_test.hpp"
#include "boost/none.hpp"
//#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
using boost::optional;
struct implicit_bool_conv
{
operator bool() { return true; }
};
struct explicit_bool_conv
{
bool operator!() const BOOST_NOEXCEPT { return false; }
BOOST_EXPLICIT_OPERATOR_BOOL_NOEXCEPT()
};
template <typename To, typename From>
void test_convert_assign()
{
optional<To> oi;
oi = From{};
BOOST_TEST(oi);
}
void test_no_bad_assignment()
{
#if !defined(BOOST_NO_CXX11_DECLTYPE) && !BOOST_WORKAROUND(BOOST_MSVC, < 1800)
// this means that type trait `boost::is_assignable` works.
BOOST_STATIC_ASSERT((boost::is_assignable<optional<bool>&, bool>::value));
BOOST_STATIC_ASSERT((boost::is_assignable<optional<bool>&, implicit_bool_conv>::value));
BOOST_STATIC_ASSERT((! boost::is_assignable<optional<bool>&, explicit_bool_conv>::value));
#endif
}
int main()
{
test_convert_assign<int, short>();
test_convert_assign<bool, implicit_bool_conv>();
test_no_bad_assignment();
return boost::report_errors();
}