forked from OSchip/llvm-project
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// Throwing bad_variant_access is supported starting in macosx10.13
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// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}} && !no-exceptions
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// <variant>
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// template <class Visitor, class... Variants>
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// constexpr see below visit(Visitor&& vis, Variants&&... vars);
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#include <variant>
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#include "test_macros.h"
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struct Incomplete;
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template<class T> struct Holder { T t; };
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constexpr bool test(bool do_it)
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{
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if (do_it) {
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std::variant<Holder<Incomplete>*, int> v = nullptr;
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std::visit([](auto){}, v);
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std::visit([](auto) -> Holder<Incomplete>* { return nullptr; }, v);
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#if TEST_STD_VER > 17
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std::visit<void>([](auto){}, v);
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std::visit<void*>([](auto) -> Holder<Incomplete>* { return nullptr; }, v);
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#endif
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}
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return true;
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}
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int main(int, char**)
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{
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test(true);
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#if TEST_STD_VER > 17
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static_assert(test(true));
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#endif
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return 0;
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}
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