40 lines
721 B
C++
40 lines
721 B
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s
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template <class T>
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T&&
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declval() noexcept;
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template <class T>
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struct some_trait
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{
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static const bool value = false;
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};
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template <class T>
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void swap(T& x, T& y) noexcept(some_trait<T>::value)
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{
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T tmp(static_cast<T&&>(x));
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x = static_cast<T&&>(y);
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y = static_cast<T&&>(tmp);
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}
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template <class T, unsigned N>
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struct array
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{
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T data[N];
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void swap(array& a) noexcept(noexcept(swap(declval<T&>(), declval<T&>())));
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};
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struct DefaultOnly
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{
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DefaultOnly() = default;
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DefaultOnly(const DefaultOnly&) = delete;
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DefaultOnly& operator=(const DefaultOnly&) = delete;
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~DefaultOnly() = default;
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};
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int main()
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{
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array<DefaultOnly, 1> a, b;
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}
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