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0012 #ifndef BOOST_TEST_DATA_MONOMORPHIC_SAMPLE_MERGE_HPP
0013 #define BOOST_TEST_DATA_MONOMORPHIC_SAMPLE_MERGE_HPP
0014
0015
0016 #include <boost/test/data/config.hpp>
0017 #include <boost/test/data/index_sequence.hpp>
0018
0019 #include <boost/test/data/monomorphic/fwd.hpp>
0020
0021 #include <boost/test/detail/suppress_warnings.hpp>
0022
0023 namespace boost {
0024 namespace unit_test {
0025 namespace data {
0026 namespace monomorphic {
0027
0028
0029
0030 namespace ds_detail {
0031
0032 template <class T>
0033 struct is_tuple : std::false_type {};
0034
0035 template <class ...T>
0036 struct is_tuple<std::tuple<T...>> : std::true_type {};
0037
0038 template <class T>
0039 struct is_tuple<T&&> : is_tuple<typename std::decay<T>::type> {};
0040
0041 template <class T>
0042 struct is_tuple<T&> : is_tuple<typename std::decay<T>::type> {};
0043
0044 template<typename T>
0045 inline auto as_tuple_impl_xvalues( T const & arg, std::false_type )
0046 -> decltype(std::tuple<T const&>(arg)) {
0047
0048 return std::forward_as_tuple(arg);
0049 }
0050
0051 template<typename T>
0052 inline auto as_tuple_impl_xvalues( T && arg, std::true_type )
0053 -> decltype(std::make_tuple(std::forward<T>(arg))) {
0054 return std::make_tuple(std::forward<T>(arg));
0055 }
0056
0057
0058 template<typename T>
0059 inline auto as_tuple_impl( T && arg, std::false_type )
0060 -> decltype(as_tuple_impl_xvalues(std::forward<T>(arg),
0061 typename std::is_rvalue_reference<T&&>::type())) {
0062 return as_tuple_impl_xvalues(std::forward<T>(arg),
0063 typename std::is_rvalue_reference<T&&>::type());
0064 }
0065
0066
0067
0068 template<typename T>
0069 inline T &&
0070 as_tuple_impl(T && arg, std::true_type ) {
0071 return std::forward<T>(arg);
0072 }
0073
0074 template<typename T>
0075 inline auto as_tuple( T && arg )
0076 -> decltype( as_tuple_impl(std::forward<T>(arg),
0077 typename ds_detail::is_tuple<T>::type()) ) {
0078 return as_tuple_impl(std::forward<T>(arg),
0079 typename ds_detail::is_tuple<T>::type());
0080 }
0081
0082
0083
0084 }
0085
0086 template<typename T1, typename T2>
0087 inline auto
0088 sample_merge( T1 && a1, T2 && a2 )
0089 -> decltype( std::tuple_cat(ds_detail::as_tuple(std::forward<T1>(a1)),
0090 ds_detail::as_tuple(std::forward<T2>(a2)) ) ) {
0091 return std::tuple_cat(ds_detail::as_tuple(std::forward<T1>(a1)),
0092 ds_detail::as_tuple(std::forward<T2>(a2)));
0093 }
0094
0095 }
0096 }
0097 }
0098 }
0099
0100 #include <boost/test/detail/enable_warnings.hpp>
0101
0102 #endif
0103