forked from OSchip/llvm-project
75 lines
2.0 KiB
C++
75 lines
2.0 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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// {
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// public:
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// engine characteristics
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// static constexpr result_type multiplier = a;
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// static constexpr result_type increment = c;
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// static constexpr result_type modulus = m;
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// static constexpr result_type min() { return c == 0u ? 1u: 0u;}
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// static constexpr result_type max() { return m - 1u;}
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// static constexpr result_type default_seed = 1u;
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#include <random>
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#include <type_traits>
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#include <cassert>
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template <class _Tp>
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void where(const _Tp &) {}
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template <class T, T a, T c, T m>
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void
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test1()
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{
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typedef std::linear_congruential_engine<T, a, c, m> LCE;
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typedef typename LCE::result_type result_type;
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static_assert((LCE::multiplier == a), "");
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static_assert((LCE::increment == c), "");
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static_assert((LCE::modulus == m), "");
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/*static_*/assert((LCE::min() == (c == 0u ? 1u: 0u))/*, ""*/);
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/*static_*/assert((LCE::max() == result_type(m - 1u))/*, ""*/);
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static_assert((LCE::default_seed == 1), "");
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where(LCE::multiplier);
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where(LCE::increment);
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where(LCE::modulus);
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where(LCE::default_seed);
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}
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template <class T>
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void
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test()
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{
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test1<T, 0, 0, 0>();
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test1<T, 0, 1, 2>();
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test1<T, 1, 1, 2>();
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const T M(~0);
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test1<T, 0, 0, M>();
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test1<T, 0, M-2, M>();
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test1<T, 0, M-1, M>();
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test1<T, M-2, 0, M>();
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test1<T, M-2, M-2, M>();
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test1<T, M-2, M-1, M>();
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test1<T, M-1, 0, M>();
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test1<T, M-1, M-2, M>();
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test1<T, M-1, M-1, M>();
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}
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int main()
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{
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test<unsigned short>();
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test<unsigned int>();
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test<unsigned long>();
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test<unsigned long long>();
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}
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