36 lines
1.0 KiB
C++
36 lines
1.0 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 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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// <optional>
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// class bad_optional_access;
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// bad_optional_access& operator=(const bad_optional_access&);
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#include <experimental/optional>
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#include <string>
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#include <cstring>
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#include <type_traits>
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#include <cassert>
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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using std::experimental::bad_optional_access;
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static_assert(std::is_nothrow_copy_assignable<bad_optional_access>::value, "");
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const std::string s1("one message");
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const std::string s2("another message");
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bad_optional_access e1(s1);
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bad_optional_access e2(s2);
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assert(std::strcmp(e1.what(), e2.what()) != 0);
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e1 = e2;
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assert(std::strcmp(e1.what(), e2.what()) == 0);
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#endif // _LIBCPP_STD_VER > 11
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}
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