| 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, c++17 |
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| 10 | |
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| 11 | // template<class In> |
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| 12 | // concept indirectly_writable; |
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| 13 | |
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| 14 | #include <iterator> |
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| 15 | |
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| 16 | #include <concepts> |
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| 17 | #include <memory> |
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| 18 | #include <optional> |
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| 19 | |
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| 20 | #include "read_write.h" |
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| 21 | |
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| 22 | template <class Out, class T> |
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| 23 | constexpr bool check_indirectly_writable() { |
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| 24 | constexpr bool result = std::indirectly_writable<Out, T>; |
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| 25 | static_assert(std::indirectly_writable<Out const, T> == result); |
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| 26 | return result; |
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| 27 | } |
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| 28 | |
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| 29 | static_assert(check_indirectly_writable<value_type_indirection, int>()); |
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| 30 | static_assert(check_indirectly_writable<value_type_indirection, double>()); |
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| 31 | static_assert(!check_indirectly_writable<value_type_indirection, double*>()); |
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| 32 | |
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| 33 | static_assert(!check_indirectly_writable<read_only_indirection, int>()); |
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| 34 | static_assert(!check_indirectly_writable<proxy_indirection, int>()); |
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| 35 | |
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| 36 | static_assert(!check_indirectly_writable<int, int>()); |
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| 37 | static_assert(!check_indirectly_writable<missing_dereference, missing_dereference::value_type>()); |
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| 38 | |
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| 39 | static_assert(!check_indirectly_writable<void*, int>()); |
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| 40 | static_assert(!check_indirectly_writable<void const*, int>()); |
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| 41 | static_assert(!check_indirectly_writable<void volatile*, int>()); |
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| 42 | static_assert(!check_indirectly_writable<void const volatile*, int>()); |
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| 43 | static_assert(!check_indirectly_writable<void*, double>()); |
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| 44 | static_assert(check_indirectly_writable<void**, int*>()); |
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| 45 | static_assert(!check_indirectly_writable<void**, int>()); |
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| 46 | |
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| 47 | static_assert(check_indirectly_writable<int*, int>()); |
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| 48 | static_assert(!check_indirectly_writable<int const*, int>()); |
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| 49 | static_assert(check_indirectly_writable<int volatile*, int>()); |
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| 50 | static_assert(!check_indirectly_writable<int const volatile*, int>()); |
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| 51 | static_assert(check_indirectly_writable<int*, double>()); |
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| 52 | static_assert(check_indirectly_writable<int**, int*>()); |
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| 53 | static_assert(!check_indirectly_writable<int**, int>()); |
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| 54 | |
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