| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14 |
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| 10 | |
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| 11 | // <variant> |
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| 12 | |
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| 13 | // template <class ...Types> class variant; |
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| 14 | |
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| 15 | // constexpr bool valueless_by_exception() const noexcept; |
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| 16 | |
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| 17 | #include <cassert> |
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| 18 | #include <string> |
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| 19 | #include <type_traits> |
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| 20 | #include <variant> |
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| 21 | |
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| 22 | #include "archetypes.h" |
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| 23 | #include "test_macros.h" |
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| 24 | #include "variant_test_helpers.h" |
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| 25 | |
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| 26 | |
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| 27 | int main(int, char**) { |
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| 28 | { |
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| 29 | using V = std::variant<int, long>; |
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| 30 | constexpr V v; |
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| 31 | static_assert(!v.valueless_by_exception(), "" ); |
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| 32 | } |
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| 33 | { |
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| 34 | using V = std::variant<int, long>; |
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| 35 | V v; |
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| 36 | assert(!v.valueless_by_exception()); |
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| 37 | } |
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| 38 | { |
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| 39 | using V = std::variant<int, long, std::string>; |
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| 40 | const V v("abc" ); |
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| 41 | assert(!v.valueless_by_exception()); |
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| 42 | } |
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| 43 | #ifndef TEST_HAS_NO_EXCEPTIONS |
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| 44 | { |
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| 45 | using V = std::variant<int, MakeEmptyT>; |
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| 46 | V v; |
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| 47 | assert(!v.valueless_by_exception()); |
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| 48 | makeEmpty(v); |
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| 49 | assert(v.valueless_by_exception()); |
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| 50 | } |
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| 51 | #endif |
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| 52 | |
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| 53 | return 0; |
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| 54 | } |
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| 55 | |
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