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 "boost/optional/optional.hpp"
  14 #include "boost/optional/optional_io.hpp"
  15 #include "boost/core/lightweight_test.hpp"
  16
  17 #ifndef BOOST_NO_IOSTREAM
  18
  19 #include <sstream>
  20
  21 #ifdef BOOST_BORLANDC
  22 #pragma hdrstop
  23 #endif
  24
  25
  26
  27 using boost::optional;
  28
  29 template<class Opt>
  30 void test2( Opt o, Opt buff )
  31 {
  32   std::stringstream s ;
  33
  34   const int markv = 123 ;
  35   int mark = 0 ;
  36
  37   s << o << " " << markv ;
  38   s >> buff >> mark ;
  39
  40   BOOST_TEST( buff == o ) ;
  41   BOOST_TEST( mark == markv ) ;
  42 }
  43
  44
  45 template<class T>
  46 void test( T v, T w )
  47 {
  48   test2( boost::make_optional(v), optional<T>  ());
  49   test2( boost::make_optional(v), boost::make_optional(w));
  50   test2( optional<T>  () , optional<T>  ());
  51   test2( optional<T>  () , boost::make_optional(w));
  52 }
  53
  54
  55 template <class T>
  56 void subtest_tag_none_reversibility_with_optional(optional<T> ov)
  57 {
  58   std::stringstream s;
  59   s << boost::none;
  60   s >> ov;
  61   BOOST_TEST(!ov);
  62 }
  63
  64 template <class T>
  65 void subtest_tag_none_equivalence_with_optional()
  66 {
  67   std::stringstream s, r;
  68   optional<T> ov;
  69   s << boost::none;
  70   r << ov;
  71   BOOST_TEST_EQ(s.str(), r.str());
  72 }
  73
  74 template <class T>
  75 void test_tag_none(T v)
  76 {
  77   subtest_tag_none_reversibility_with_optional(optional<T>(v));
  78   subtest_tag_none_reversibility_with_optional(optional<T>());
  79   subtest_tag_none_equivalence_with_optional<T>();
  80 }
  81
  82
  83 int main()
  84 {
  85   test(1,2);
  86   test(std::string("hello"), std::string("buffer"));
  87   test_tag_none(10);
  88   test_tag_none(std::string("text"));
  89
  90   return boost::report_errors();
  91 }
  92
  93 #else // BOOST_NO_IOSTREAM
  94
  95 int main()
  96 {
  97   return boost::report_errors();
  98 }
  99
 100 #endif // BOOST_NO_IOSTREAM