59 lines
1.6 KiB
C++
59 lines
1.6 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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// <random>
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// class seed_seq;
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// template<class RandomAccessIterator>
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// void generate(RandomAccessIterator begin, RandomAccessIterator end);
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// Check the following requirement: https://eel.is/c++draft/rand.util.seedseq#7
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//
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// Mandates: iterator_traits<RandomAccessIterator>::value_type is an unsigned integer
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// type capable of accommodating 32-bit quantities.
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// UNSUPPORTED: c++03
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// REQUIRES: stdlib=libc++
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#include <random>
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#include <climits>
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#include "test_macros.h"
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void f() {
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std::seed_seq seq;
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// Not an integral type
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{
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double* p = nullptr;
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seq.generate(p, p); // expected-error-re@*:* {{static assertion failed{{.+}}: [rand.util.seedseq]/7 requires{{.+}}}}
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// expected-error@*:* 0+ {{invalid operands to}}
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}
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// Not an unsigned type
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{
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long long* p = nullptr;
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seq.generate(p, p); // expected-error-re@*:* {{static assertion failed{{.+}}: [rand.util.seedseq]/7 requires{{.+}}}}
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}
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// Not a 32-bit type
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{
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#if UCHAR_MAX < UINT32_MAX
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unsigned char* p = nullptr;
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seq.generate(p, p); // expected-error-re@*:* {{static assertion failed{{.+}}: [rand.util.seedseq]/7 requires{{.+}}}}
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#endif
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}
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// Everything satisfied
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{
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unsigned long* p = nullptr;
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seq.generate(p, p); // no diagnostic
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}
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}
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