86ed8aefb2
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119541 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <tuple>
|
|
|
|
// template <class... Types> class tuple;
|
|
|
|
// template <class... Types>
|
|
// class tuple_size<tuple<Types...>>
|
|
// : public integral_constant<size_t, sizeof...(Types)> { };
|
|
|
|
#include <tuple>
|
|
#include <type_traits>
|
|
|
|
template <class T, std::size_t N>
|
|
void test()
|
|
{
|
|
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
|
|
std::tuple_size<T> >::value), "");
|
|
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
|
|
std::tuple_size<const T> >::value), "");
|
|
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
|
|
std::tuple_size<volatile T> >::value), "");
|
|
static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
|
|
std::tuple_size<const volatile T> >::value), "");
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test<std::tuple<>, 0>();
|
|
test<std::tuple<int>, 1>();
|
|
test<std::tuple<char, int>, 2>();
|
|
test<std::tuple<char, char*, int>, 3>();
|
|
}
|