44 lines
963 B
C++
44 lines
963 B
C++
//===----------------------------------------------------------------------===//
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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, c++11
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// <optional>
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// constexpr T* optional<T>::operator->();
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#ifdef _LIBCPP_DEBUG
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#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
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#endif
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#include <experimental/optional>
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#include <type_traits>
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#include <cassert>
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using std::experimental::optional;
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struct X
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{
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constexpr int test() const {return 3;}
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};
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int main()
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{
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{
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constexpr optional<X> opt(X{});
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static_assert(opt->test() == 3, "");
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}
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#ifdef _LIBCPP_DEBUG
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{
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optional<X> opt;
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assert(opt->test() == 3);
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assert(false);
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}
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#endif // _LIBCPP_DEBUG
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}
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