LCOV - code coverage report

Current view: | top level - cereal/types - tuple.hpp (source / functions) |  |  | Hit | Total | Coverage
Test: | coverage.info |  | Lines: | 10 | 10 | 100.0 %
Date: | 2022-01-16 21:05:07 |  | Functions: | 307 | 307 | 100.0 %

              Line data    Source code

           1             : /*! \file tuple.hpp
           2             :     \brief Support for types found in \<tuple\>
           3             :     \ingroup STLSupport */
           4             : /*
           5             :   Copyright (c) 2014, Randolph Voorhies, Shane Grant
           6             :   All rights reserved.
           7             :
           8             :   Redistribution and use in source and binary forms, with or without
           9             :   modification, are permitted provided that the following conditions are met:
          10             :       * Redistributions of source code must retain the above copyright
          11             :         notice, this list of conditions and the following disclaimer.
          12             :       * Redistributions in binary form must reproduce the above copyright
          13             :         notice, this list of conditions and the following disclaimer in the
          14             :         documentation and/or other materials provided with the distribution.
          15             :       * Neither the name of the copyright holder nor the
          16             :         names of its contributors may be used to endorse or promote products
          17             :         derived from this software without specific prior written permission.
          18             :
          19             :   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
          20             :   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
          21             :   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
          22             :   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
          23             :   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
          24             :   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
          25             :   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
          26             :   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
          27             :   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
          28             :   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
          29             : */
          30             : #ifndef CEREAL_TYPES_TUPLE_HPP_
          31             : #define CEREAL_TYPES_TUPLE_HPP_
          32             :
          33             : #include "cereal/cereal.hpp"
          34             : #include <tuple>
          35             :
          36             : namespace cereal
          37             : {
          38             :   namespace tuple_detail
          39             :   {
          40             :     //! Creates a c string from a sequence of characters
          41             :     /*! The c string created will always be prefixed by "tuple_element"
          42             :         Based on code from: http://stackoverflow/a/20973438/710791
          43             :         @internal */
          44             :     template<char...Cs>
          45             :     struct char_seq_to_c_str
          46             :     {
          47             :       static const int size = 14;// Size of array for the word: tuple_element
          48             :       typedef const char (&arr_type)[sizeof...(Cs) + size];
          49             :       static const char str[sizeof...(Cs) + size];
          50             :     };
          51             :
          52             :     // the word tuple_element plus a number
          53             :     //! @internal
          54             :     template<char...Cs>
          55             :     const char char_seq_to_c_str<Cs...>::str[sizeof...(Cs) + size] =
          56             :       {'t','u','p','l','e','_','e','l','e','m','e','n','t', Cs..., '\0'};
          57             :
          58             :     //! Converts a number into a sequence of characters
          59             :     /*! @tparam Q The quotient of dividing the original number by 10
          60             :         @tparam R The remainder of dividing the original number by 10
          61             :         @tparam C The sequence built so far
          62             :         @internal */
          63             :     template <size_t Q, size_t R, char ... C>
          64             :     struct to_string_impl
          65             :     {
          66             :       using type = typename to_string_impl<Q/10, Q%10, static_cast<char>(R+std::size_t{'0'}), C...>::type;
          67             :     };
          68             :
          69             :     //! Base case with no quotient
          70             :     /*! @internal */
          71             :     template <size_t R, char ... C>
          72             :     struct to_string_impl<0, R, C...>
          73             :     {
          74             :       using type = char_seq_to_c_str<static_cast<char>(R+std::size_t{'0'}), C...>;
          75             :     };
          76             :
          77             :     //! Generates a c string for a given index of a tuple
          78             :     /*! Example use:
          79             :         @code{cpp}
          80             :         tuple_element_name<3>::c_str();// returns "tuple_element3"
          81             :         @endcode
          82             :         @internal */
          83             :     template<size_t T>
          84             :     struct tuple_element_name
          85             :     {
          86             :       using type = typename to_string_impl<T/10, T%10>::type;
          87       24800 :       static const typename type::arr_type c_str(){ return type::str; }
          88             :     };
          89             :
          90             :     // unwinds a tuple to save it
          91             :     //! @internal
          92             :     template <size_t Height>
          93             :     struct serialize
          94             :     {
          95             :       template <class Archive, class ... Types> inline
          96       24800 :       static void apply( Archive & ar, std::tuple<Types...> & tuple )
          97             :       {
          98       24800 :         serialize<Height - 1>::template apply( ar, tuple );
          99       24800 :         ar( CEREAL_NVP_(tuple_element_name<Height - 1>::c_str(),
         100             :             std::get<Height - 1>( tuple )) );
         101       24800 :       }
         102             :     };
         103             :
         104             :     // Zero height specialization - nothing to do here
         105             :     //! @internal
         106             :     template <>
         107             :     struct serialize<0>
         108             :     {
         109             :       template <class Archive, class ... Types> inline
         110        4800 :       static void apply( Archive &, std::tuple<Types...> & )
         111        4800 :       { }
         112             :     };
         113             :   }
         114             :
         115             :   //! Serializing for std::tuple
         116             :   template <class Archive, class ... Types> inline
         117        4800 :   void CEREAL_SERIALIZE_FUNCTION_NAME( Archive & ar, std::tuple<Types...> & tuple )
         118             :   {
         119        4800 :     tuple_detail::serialize<std::tuple_size<std::tuple<Types...>>::value>::template apply( ar, tuple );
         120        4800 :   }
         121             : } // namespace cereal
         122             :
         123             : #endif // CEREAL_TYPES_TUPLE_HPP_

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