xref: /llvm-project/libcxx/test/std/numerics/rand/rand.adapt/rand.adapt.disc/values.pass.cpp (revision 2df59c50688c122bbcae7467d3eaf862c3ea3088)

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// <random>

// template<class Engine, size_t p, size_t r>
// class discard_block_engine
// {
// public:
//     // types
//     typedef typename Engine::result_type result_type;
//
//     // engine characteristics
//     static constexpr size_t block_size = p;
//     static constexpr size_t used_block = r;
//     static constexpr result_type min() { return Engine::min(); }
//     static constexpr result_type max() { return Engine::max(); }

#include <random>
#include <type_traits>
#include <cassert>

#include "test_macros.h"

template <class T>
void where(const T &) {}

void
test1()
{
    typedef std::ranlux24 E;
    static_assert((E::block_size == 223), "");
    static_assert((E::used_block == 23), "");
#if TEST_STD_VER >= 11
    static_assert((E::min() == 0), "");
    static_assert((E::max() == 0xFFFFFF), "");
#else
    assert((E::min() == 0));
    assert((E::max() == 0xFFFFFF));
#endif
    where(E::block_size);
    where(E::used_block);
}

void
test2()
{
    typedef std::ranlux48 E;
    static_assert((E::block_size == 389), "");
    static_assert((E::used_block == 11), "");
#if TEST_STD_VER >= 11
    static_assert((E::min() == 0), "");
    static_assert((E::max() == 0xFFFFFFFFFFFFull), "");
#else
    assert((E::min() == 0));
    assert((E::max() == 0xFFFFFFFFFFFFull));
#endif
    where(E::block_size);
    where(E::used_block);
}

int main(int, char**)
{
    test1();
    test2();

  return 0;
}