1739d3ef0a
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@289774 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
814 B
C++
39 lines
814 B
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03
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// <tuple>
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// template <class TupleLike> tuple(TupleLike&&); // libc++ extension
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// See llvm.org/PR31384
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#include <tuple>
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#include <cassert>
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int count = 0;
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template<class T>
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struct derived : std::tuple<T> {
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using std::tuple<T>::tuple;
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template<class U>
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operator std::tuple<U>() && {
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++count;
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return {};
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}
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};
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int main() {
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std::tuple<int> foo = derived<int&&>{42};
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assert(count == 1);
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}
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