forked from OSchip/llvm-project
76 lines
1.6 KiB
C++
76 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 InputIterator>
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// seed_seq(InputIterator begin, InputIterator end);
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#include <random>
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#include <cassert>
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#include "test_macros.h"
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void test()
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{
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{
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unsigned a[5] = {5, 4, 3, 2, 1};
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std::seed_seq s(a, a+5);
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assert(s.size() == 5);
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unsigned b[5] = {0};
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s.param(b);
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assert(b[0] == 5);
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assert(b[1] == 4);
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assert(b[2] == 3);
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assert(b[3] == 2);
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assert(b[4] == 1);
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}
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{
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// Test truncation to 32 bits
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unsigned long long a[4] = {
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0x1234000056780000uLL,
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0x0000001234567800uLL,
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0xFFFFFFFFFFFFFFFFuLL,
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0x0000000180000000uLL,
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};
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std::seed_seq s(a, a+4);
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assert(s.size() == 4);
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unsigned b[4] = {0};
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s.param(b);
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assert(b[0] == 0x56780000u);
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assert(b[1] == 0x34567800u);
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assert(b[2] == 0xFFFFFFFFu);
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assert(b[3] == 0x80000000u);
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}
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#if TEST_STD_VER >= 11
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{
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// Test uniform initialization syntax (LWG 3422)
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unsigned a[3] = {1, 2, 3};
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std::seed_seq s{a, a+3}; // uniform initialization
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assert(s.size() == 3);
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unsigned b[3] = {0};
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s.param(b);
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assert(b[0] == 1);
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assert(b[1] == 2);
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assert(b[2] == 3);
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}
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#endif // TEST_STD_VER >= 11
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}
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int main(int, char**)
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{
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test();
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return 0;
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}
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