ceph/src/boost/libs/optional/test/optional_test_io.cpp

   1 // Copyright (C) 2003, Fernando Luis Cacciola Carballal.
   2 // Copyright (C) 2014 Andrzej Krzemienski.
   3 //
   4 // Use, modification, and distribution is subject to the Boost Software
   5 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // See http://www.boost.org/lib/optional for documentation.
   9 //
  10 // You are welcome to contact the author at:
  11 //  fernando_cacciola@hotmail.com
  12
  13 #include <sstream>
  14 #include "boost/optional/optional.hpp"
  15 #include "boost/optional/optional_io.hpp"
  16
  17 #ifdef __BORLANDC__
  18 #pragma hdrstop
  19 #endif
  20
  21 #include "boost/core/lightweight_test.hpp"
  22
  23 using boost::optional;
  24
  25 template<class Opt>
  26 void test2( Opt o, Opt buff )
  27 {
  28   std::stringstream s ;
  29
  30   const int markv = 123 ;
  31   int mark = 0 ;
  32
  33   s << o << " " << markv ;
  34   s >> buff >> mark ;
  35
  36   BOOST_TEST( buff == o ) ;
  37   BOOST_TEST( mark == markv ) ;
  38 }
  39
  40
  41 template<class T>
  42 void test( T v, T w )
  43 {
  44   test2( boost::make_optional(v), optional<T>  ());
  45   test2( boost::make_optional(v), boost::make_optional(w));
  46   test2( optional<T>  () , optional<T>  ());
  47   test2( optional<T>  () , boost::make_optional(w));
  48 }
  49
  50
  51 template <class T>
  52 void subtest_tag_none_reversibility_with_optional(optional<T> ov)
  53 {
  54   std::stringstream s;
  55   s << boost::none;
  56   s >> ov;
  57   BOOST_TEST(!ov);
  58 }
  59
  60 template <class T>
  61 void subtest_tag_none_equivalence_with_optional()
  62 {
  63   std::stringstream s, r;
  64   optional<T> ov;
  65   s << boost::none;
  66   r << ov;
  67   BOOST_TEST_EQ(s.str(), r.str());
  68 }
  69
  70 template <class T>
  71 void test_tag_none(T v)
  72 {
  73   subtest_tag_none_reversibility_with_optional(optional<T>(v));
  74   subtest_tag_none_reversibility_with_optional(optional<T>());
  75   subtest_tag_none_equivalence_with_optional<T>();
  76 }
  77
  78
  79 int main()
  80 {
  81   test(1,2);
  82   test(std::string("hello"), std::string("buffer"));
  83   test_tag_none(10);
  84   test_tag_none(std::string("text"));
  85
  86   return boost::report_errors();
  87 }