arg.cpp
1.98 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
/*=============================================================================
Copyright (c) 2017 Paul Fultz II
arg.cpp
Distributed under 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/hof/arg.hpp>
#include <boost/hof/is_invocable.hpp>
#include <type_traits>
#include "test.hpp"
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::arg_c<3>(1,2,3,4,5) == 3);
BOOST_HOF_TEST_CHECK( boost::hof::arg_c<3>(1,2,3,4,5) == 3 );
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::arg(std::integral_constant<int, 3>())(1,2,3,4,5) == 3);
BOOST_HOF_TEST_CHECK( boost::hof::arg(std::integral_constant<int, 3>())(1,2,3,4,5) == 3 );
}
BOOST_HOF_TEST_CASE()
{
auto at_3 = boost::hof::arg(std::integral_constant<int, 3>());
static_assert(boost::hof::is_invocable<decltype(at_3), int, int, int>::value, "Not SFINAE-friendly");
static_assert(!boost::hof::is_invocable<decltype(at_3), int, int>::value, "Not SFINAE-friendly");
static_assert(!boost::hof::is_invocable<decltype(at_3), int>::value, "Not SFINAE-friendly");
}
struct foo {};
BOOST_HOF_TEST_CASE()
{
static_assert(!boost::hof::is_invocable<decltype(boost::hof::arg), int>::value, "Not sfinae friendly");
static_assert(!boost::hof::is_invocable<decltype(boost::hof::arg), foo>::value, "Not sfinae friendly");
}
struct copy_throws
{
copy_throws() {}
copy_throws(copy_throws const&) {}
copy_throws(copy_throws&&) noexcept {}
};
#if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
BOOST_HOF_TEST_CASE()
{
static_assert(noexcept(boost::hof::arg_c<3>(1,2,3,4,5)), "noexcept arg");
static_assert(noexcept(boost::hof::arg(std::integral_constant<int, 3>())(1,2,3,4,5)), "noexcept arg");
static_assert(!noexcept(boost::hof::arg(std::integral_constant<int, 3>())(1,2,copy_throws{},4,5)), "noexcept arg");
}
#endif