| 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 | // <any> |
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| 12 | |
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| 13 | // template <class ValueType> |
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| 14 | // ValueType const any_cast(any const&); |
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| 15 | // |
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| 16 | // template <class ValueType> |
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| 17 | // ValueType any_cast(any &); |
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| 18 | // |
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| 19 | // template <class ValueType> |
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| 20 | // ValueType any_cast(any &&); |
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| 21 | |
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| 22 | // Test instantiating the any_cast with a non-copyable type. |
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| 23 | |
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| 24 | // This test only checks that we static_assert in any_cast when the |
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| 25 | // constraints are not respected, however Clang will sometimes emit |
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| 26 | // additional errors while trying to instantiate the rest of any_cast |
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| 27 | // following the static_assert. We ignore unexpected errors in |
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| 28 | // clang-verify to make the test more robust to changes in Clang. |
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| 29 | // ADDITIONAL_COMPILE_FLAGS: -Xclang -verify-ignore-unexpected=error |
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| 30 | |
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| 31 | #include <any> |
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| 32 | |
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| 33 | struct no_copy { |
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| 34 | no_copy() {} |
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| 35 | no_copy(no_copy &&) {} |
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| 36 | no_copy(no_copy const &) = delete; |
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| 37 | }; |
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| 38 | |
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| 39 | struct no_move { |
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| 40 | no_move() {} |
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| 41 | no_move(no_move&&) = delete; |
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| 42 | no_move(no_move const&) {} |
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| 43 | }; |
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| 44 | |
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| 45 | void f() { |
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| 46 | std::any a; |
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| 47 | // expected-error-re@any:* {{static assertion failed{{.*}}ValueType is required to be an lvalue reference or a CopyConstructible type}} |
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| 48 | std::any_cast<no_copy>(any&: static_cast<std::any&>(a)); // expected-note {{requested here}} |
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| 49 | |
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| 50 | // expected-error-re@any:* {{static assertion failed{{.*}}ValueType is required to be a const lvalue reference or a CopyConstructible type}} |
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| 51 | std::any_cast<no_copy>(any: static_cast<std::any const&>(a)); // expected-note {{requested here}} |
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| 52 | |
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| 53 | std::any_cast<no_copy>(any: static_cast<std::any &&>(a)); // OK |
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| 54 | |
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| 55 | // expected-error-re@any:* {{static assertion failed{{.*}}ValueType is required to be an rvalue reference or a CopyConstructible type}} |
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| 56 | std::any_cast<no_move>(any: static_cast<std::any &&>(a)); |
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| 57 | } |
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| 58 | |
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