forked from OSchip/llvm-project
74 lines
1.5 KiB
C++
74 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <random>
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// template <class UIntType, UIntType a, UIntType c, UIntType m>
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// class linear_congruential_engine;
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// void discard(unsigned long long z);
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#include <random>
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#include <cassert>
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template <class T>
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void
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rand0()
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{
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typedef std::linear_congruential_engine<T, 16807, 0, 2147483647> E;
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E e;
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e.discard(9999);
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assert(e() == 1043618065);
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}
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template <class T>
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void
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rand()
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{
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typedef std::linear_congruential_engine<T, 48271, 0, 2147483647> E;
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E e;
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e.discard(9999);
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assert(e() == 399268537);
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}
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template <class T>
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void
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other()
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{
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typedef std::linear_congruential_engine<T, 48271, 123465789, 2147483647> E;
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E e1;
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E e2;
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assert(e1 == e2);
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e1.discard(1);
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assert(e1 != e2);
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e2();
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assert(e1 == e2);
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e1.discard(3);
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assert(e1 != e2);
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e2();
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e2();
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e2();
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assert(e1 == e2);
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}
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int main()
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{
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rand0<unsigned int>();
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rand0<unsigned long>();
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rand0<unsigned long long>();
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rand<unsigned int>();
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rand<unsigned long>();
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rand<unsigned long long>();
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other<unsigned int>();
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other<unsigned long>();
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other<unsigned long long>();
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}
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