| 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 | // <random> |
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| 10 | |
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| 11 | // class seed_seq; |
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| 12 | |
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| 13 | // template<class RandomAccessIterator> |
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| 14 | // void generate(RandomAccessIterator begin, RandomAccessIterator end); |
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| 15 | |
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| 16 | // Check the following requirement: https://eel.is/c++draft/rand.util.seedseq#7 |
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| 17 | // |
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| 18 | // Mandates: iterator_traits<RandomAccessIterator>::value_type is an unsigned integer |
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| 19 | // type capable of accommodating 32-bit quantities. |
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| 20 | |
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| 21 | // UNSUPPORTED: c++03 |
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| 22 | // REQUIRES: stdlib=libc++ |
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| 23 | |
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| 24 | #include <random> |
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| 25 | #include <climits> |
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| 26 | #include <cstdint> |
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| 27 | |
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| 28 | #include "test_macros.h" |
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| 29 | |
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| 30 | void f() { |
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| 31 | std::seed_seq seq; |
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| 32 | |
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| 33 | // Not an integral type |
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| 34 | { |
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| 35 | double* p = nullptr; |
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| 36 | seq.generate(p, p); // expected-error-re@*:* {{static assertion failed{{.+}}: [rand.util.seedseq]/7 requires{{.+}}}} |
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| 37 | // expected-error@*:* 0+ {{invalid operands to}} |
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| 38 | } |
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| 39 | |
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| 40 | // Not an unsigned type |
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| 41 | { |
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| 42 | long long* p = nullptr; |
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| 43 | seq.generate(p, p); // expected-error-re@*:* {{static assertion failed{{.+}}: [rand.util.seedseq]/7 requires{{.+}}}} |
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| 44 | } |
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| 45 | |
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| 46 | // Not a 32-bit type |
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| 47 | { |
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| 48 | #if UCHAR_MAX < UINT32_MAX |
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| 49 | unsigned char* p = nullptr; |
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| 50 | seq.generate(p, p); // expected-error-re@*:* {{static assertion failed{{.+}}: [rand.util.seedseq]/7 requires{{.+}}}} |
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| 51 | #endif |
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| 52 | } |
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| 53 | |
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| 54 | // Everything satisfied |
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| 55 | { |
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| 56 | unsigned long* p = nullptr; |
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| 57 | seq.generate(p, p); // no diagnostic |
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| 58 | } |
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| 59 | } |
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| 60 | |
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