ceph/src/boost/boost/test/data/for_each_sample.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 /// @file
   9 /// Defines for_each_sample algorithm
  10 // ***************************************************************************
  11
  12 #ifndef BOOST_TEST_DATA_FOR_EACH_SAMPLE_HPP_102211GER
  13 #define BOOST_TEST_DATA_FOR_EACH_SAMPLE_HPP_102211GER
  14
  15 // Boost.Test
  16 #include <boost/test/data/config.hpp>
  17 #include <boost/test/data/size.hpp>
  18 #include <boost/test/data/index_sequence.hpp>
  19 #include <boost/test/data/monomorphic/sample_merge.hpp>
  20 #include <boost/test/data/monomorphic/fwd.hpp>
  21
  22 // STL
  23 #include <tuple>
  24
  25 #include <boost/test/detail/suppress_warnings.hpp>
  26
  27 // needed for std::min
  28 #include <algorithm>
  29
  30 //____________________________________________________________________________//
  31
  32 namespace boost {
  33 namespace unit_test {
  34 namespace data {
  35
  36 // ************************************************************************** //
  37 // **************              data::invoke_action             ************** //
  38 // ************************************************************************** //
  39
  40 template<typename Action, typename T>
  41 inline void
  42 invoke_action( Action const& action, T && arg, std::false_type /* is_tuple */ )
  43 {
  44     action( std::forward<T>(arg) );
  45 }
  46
  47 //____________________________________________________________________________//
  48
  49 template<typename Action, typename T, std::size_t ...I>
  50 inline void
  51 invoke_action_impl( Action const& action,
  52                     T && args,
  53                     index_sequence<I...> const& )
  54 {
  55     action( std::get<I>(std::forward<T>(args))... );
  56 }
  57
  58 //____________________________________________________________________________//
  59
  60 template<typename Action, typename T>
  61 inline void
  62 invoke_action( Action const& action, T&& args, std::true_type /* is_tuple */ )
  63 {
  64     invoke_action_impl( action,
  65                         std::forward<T>(args),
  66                         typename make_index_sequence< 0,
  67                                                       std::tuple_size<typename std::decay<T>::type>::value
  68                                                     >::type{} );
  69
  70 }
  71
  72 //____________________________________________________________________________//
  73
  74 // ************************************************************************** //
  75 // **************                for_each_sample               ************** //
  76 // ************************************************************************** //
  77
  78 template<typename DataSet, typename Action>
  79 inline typename std::enable_if<monomorphic::is_dataset<DataSet>::value,void>::type
  80 for_each_sample( DataSet &&         samples,
  81                  Action const&      act,
  82                  data::size_t       number_of_samples = BOOST_TEST_DS_INFINITE_SIZE )
  83 {
  84     data::size_t size = (std::min)( samples.size(), number_of_samples );
  85     BOOST_TEST_DS_ASSERT( !size.is_inf(), "Dataset has infinite size. Please specify the number of samples" );
  86
  87     auto it = samples.begin();
  88
  89     while( size-- > 0 ) {
  90         invoke_action( act,
  91                        *it,
  92                        typename monomorphic::ds_detail::is_tuple<decltype(*it)>::type());
  93         ++it;
  94     }
  95 }
  96
  97 //____________________________________________________________________________//
  98
  99 template<typename DataSet, typename Action>
 100 inline typename std::enable_if<!monomorphic::is_dataset<DataSet>::value,void>::type
 101 for_each_sample( DataSet &&     samples,
 102                  Action const&      act,
 103                  data::size_t       number_of_samples = BOOST_TEST_DS_INFINITE_SIZE )
 104 {
 105     data::for_each_sample( data::make( std::forward<DataSet>(samples) ),
 106                            act,
 107                            number_of_samples );
 108 }
 109
 110 } // namespace data
 111 } // namespace unit_test
 112 } // namespace boost
 113
 114 #include <boost/test/detail/enable_warnings.hpp>
 115
 116 #endif // BOOST_TEST_DATA_FOR_EACH_SAMPLE_HPP_102211GER
 117