f5256e16df
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103516 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <tuple>
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// template <class... Types> class tuple;
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// template <class... Types>
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// class tuple_size<tuple<Types...>>
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// : public integral_constant<size_t, sizeof...(Types)> { };
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#include <tuple>
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#include <type_traits>
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int main()
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{
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{
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typedef std::tuple<> T;
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static_assert((std::is_base_of<std::integral_constant<std::size_t, 0>,
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std::tuple_size<T> >::value), "");
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}
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{
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typedef std::tuple<int> T;
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static_assert((std::is_base_of<std::integral_constant<std::size_t, 1>,
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std::tuple_size<T> >::value), "");
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}
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{
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typedef std::tuple<char, int> T;
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static_assert((std::is_base_of<std::integral_constant<std::size_t, 2>,
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std::tuple_size<T> >::value), "");
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}
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{
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typedef std::tuple<char, char*, int> T;
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static_assert((std::is_base_of<std::integral_constant<std::size_t, 3>,
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std::tuple_size<T> >::value), "");
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}
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}
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