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/*
Copyright 2019-2023 Glen Joseph Fernandes
(glenjofe@gmail.com)
Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_CONSTEXPR) && !defined(BOOST_NO_CXX11_DECLTYPE)
#include <boost/core/span.hpp>
#include <boost/core/lightweight_test_trait.hpp>
template<class T>
struct range {
T* data() {
return 0;
}
const T* data() const {
return 0;
}
std::size_t size() const {
return 0;
}
};
struct buffer {
void* data() {
return 0;
}
const void* data() const {
return 0;
}
std::size_t size() const {
return 0;
}
};
struct base { };
struct derived
: base { };
void test_default()
{
BOOST_TEST_TRAIT_TRUE((std::is_default_constructible<
boost::span<int> >));
BOOST_TEST_TRAIT_TRUE((std::is_default_constructible<
boost::span<int, 0> >));
BOOST_TEST_TRAIT_FALSE((std::is_default_constructible<
boost::span<int, 2> >));
}
void test_data_size()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
int*, std::size_t>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
int*, std::size_t>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
int, std::size_t>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
const int*, std::size_t>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base>,
derived*, std::size_t>));
}
void test_first_last()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
int*, int*>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
int*, const int*>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
int*, int*>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
int, int*>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
const int*, int*>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base>,
derived*, derived*>));
}
void test_array()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
int(&)[4]>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int, 4>,
int(&)[4]>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 2>,
int(&)[4]>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 4>,
int(&)[2]>));
}
void test_std_array()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
std::array<int, 4>&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
std::array<int, 4>&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int, 4>,
std::array<int, 4>&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int,
4>, std::array<int, 4>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
std::array<const int, 4>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base>,
std::array<derived, 4>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 2>,
std::array<int, 4>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 4>,
std::array<const int, 4>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base, 4>,
std::array<derived, 4>&>));
}
void test_const_std_array()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
const std::array<int, 4> >));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int,
4>, const std::array<int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
const std::array<int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<const
base>, const std::array<derived, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<const int,
2>, const std::array<int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 4>,
const std::array<int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<const
base, 4>, const std::array<derived, 4> >));
}
void test_range()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
range<int>&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
range<int>&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
range<int> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
int*>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
range<int> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
const range<int>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base>,
range<derived>&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
buffer>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
const buffer&>));
}
void test_initializer_list()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
std::initializer_list<int> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
std::initializer_list<int> >));
}
void test_span()
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int>,
boost::span<int> >));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int>,
boost::span<int, 4> >));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<int, 4>,
boost::span<int> >));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<boost::span<const int,
4>, boost::span<int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int>,
boost::span<const int> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base>,
boost::span<derived> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 2>,
boost::span<int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<int, 4>,
boost::span<const int, 4> >));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<boost::span<base, 4>,
boost::span<derived, 4> >));
}
void test_copy()
{
BOOST_TEST_TRAIT_TRUE((std::is_copy_constructible<
boost::span<int> >));
BOOST_TEST_TRAIT_TRUE((std::is_copy_constructible<
boost::span<int, 4> >));
}
void test_assign()
{
BOOST_TEST_TRAIT_TRUE((std::is_copy_assignable<
boost::span<int> >));
BOOST_TEST_TRAIT_TRUE((std::is_copy_assignable<
boost::span<int, 4> >));
}
int main()
{
test_default();
test_data_size();
test_first_last();
test_array();
test_std_array();
test_const_std_array();
test_range();
test_initializer_list();
test_span();
test_copy();
test_assign();
return boost::report_errors();
}
#else
int main()
{
return 0;
}
#endif
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