mirror of
https://github.com/boostorg/callable_traits.git
synced 2026-01-22 17:12:13 +00:00
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
|
|
Copyright Barrett Adair 2016
|
|
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt)
|
|
|
|
*/
|
|
|
|
#include <boost/callable_traits/replace_args.hpp>
|
|
#include <tuple>
|
|
#include "test.hpp"
|
|
|
|
struct foo;
|
|
|
|
template<std::size_t I, typename T>
|
|
struct is_substitution_failure_replace_args {
|
|
|
|
template<typename>
|
|
static auto test(...) -> std::true_type;
|
|
|
|
template<typename U,
|
|
boost::callable_traits::replace_args_t<I, U, int, int, int, int>* = nullptr>
|
|
static auto test(int) -> std::false_type;
|
|
|
|
static constexpr bool value = decltype(test<T>(0))::value;
|
|
};
|
|
|
|
template<std::size_t I, typename T>
|
|
void assert_sfinae_replace_args() {
|
|
CT_ASSERT(is_substitution_failure_replace_args<I, T>::value);
|
|
}
|
|
|
|
int main() {
|
|
|
|
auto lambda = [](){};
|
|
|
|
//SFINAE because parameter list not present/cannot be manipulated
|
|
assert_sfinae_replace_args<0, decltype(lambda)>();
|
|
assert_sfinae_replace_args<0, decltype(lambda)&>();
|
|
assert_sfinae_replace_args<0, int>();
|
|
assert_sfinae_replace_args<0, int &>();
|
|
assert_sfinae_replace_args<0, int (* const &)()>();
|
|
assert_sfinae_replace_args<0, int (foo::* &)()>();
|
|
assert_sfinae_replace_args<0, int (foo::* const)()>();
|
|
assert_sfinae_replace_args<0, int (foo::* const &)()>();
|
|
assert_sfinae_replace_args<0, int (foo::* volatile)()>();
|
|
assert_sfinae_replace_args<0, void>();
|
|
assert_sfinae_replace_args<0, void*>();
|
|
assert_sfinae_replace_args<0, void(**)()>();
|
|
|
|
//SFINAE because index is out of range
|
|
assert_sfinae_replace_args<17, void()>();
|
|
assert_sfinae_replace_args<1, void()>();
|
|
assert_sfinae_replace_args<2, void(int)>();
|
|
assert_sfinae_replace_args<1, void(foo::*)(int)>();
|
|
assert_sfinae_replace_args<2, void(foo::*)(int, int) const>();
|
|
}
|