libcxx/test/std/numerics/rand/rand.eng/rand.eng.sub/io.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <random>
  10
  11 // template<class UIntType, size_t w, size_t s, size_t r>
  12 // class subtract_with_carry_engine;
  13
  14 // template <class charT, class traits,
  15 //           class UIntType, size_t w, size_t s, size_t r>
  16 // basic_ostream<charT, traits>&
  17 // operator<<(basic_ostream<charT, traits>& os,
  18 //            const subtract_with_carry_engine<UIntType, w, s, r>& x);
  19 //
  20 // template <class charT, class traits,
  21 //           class UIntType, size_t w, size_t s, size_t r>
  22 // basic_istream<charT, traits>&
  23 // operator>>(basic_istream<charT, traits>& is,
  24 //            subtract_with_carry_engine<UIntType, w, s, r>& x);
  25
  26 #include <random>
  27 #include <sstream>
  28 #include <cassert>
  29
  30 #include "test_macros.h"
  31
  32 void
  33 test1()
  34 {
  35     typedef std::ranlux24_base E;
  36     E e1;
  37     e1.discard(100);
  38     std::ostringstream os;
  39     os << e1;
  40     std::istringstream is(os.str());
  41     E e2;
  42     is >> e2;
  43     assert(e1 == e2);
  44 }
  45
  46 void
  47 test2()
  48 {
  49     typedef std::ranlux48_base E;
  50     E e1;
  51     e1.discard(100);
  52     std::ostringstream os;
  53     os << e1;
  54     std::istringstream is(os.str());
  55     E e2;
  56     is >> e2;
  57     assert(e1 == e2);
  58 }
  59
  60 int main(int, char**)
  61 {
  62     test1();
  63     test2();
  64
  65   return 0;
  66 }