text: /*
   * Copyright (c) 2013-2015, Roland Bock
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   *   Redistributions of source code must retain the above copyright notice, this
   *   list of conditions and the following disclaimer.
   *
   *   Redistributions in binary form must reproduce the above copyright notice, this
   *   list of conditions and the following disclaimer in the documentation and/or
   *   other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef SQLPP11_RESULT_FIELD_H
  #define SQLPP11_RESULT_FIELD_H
  
  #include <ostream>
  #include <sqlpp11/wrong.h>
  #include <sqlpp11/wrap_operand.h>
  #include <sqlpp11/type_traits.h>
  
  namespace sqlpp
  {
    template <typename Db, typename FieldSpec>
    struct result_field_t
    {
      using X = typename FieldSpec::incorrect;
      static_assert(wrong_t<result_field_t>::value, "Missing specialization for result_field_t");
    };
  
    template <typename Context, typename Db, typename FieldSpec>
    struct serializer_t<Context, result_field_t<Db, FieldSpec>>
    {
      using _serialize_check = consistent_t;
      using T = result_field_t<Db, FieldSpec>;
  
      static Context& _(const T& t, Context& context)
      {
        if (t.is_null() and not null_is_trivial_value_t<T>::value)
        {
          context << "NULL";
        }
        else
        {
          serialize(wrap_operand_t<cpp_value_type_of<FieldSpec>>(t.value()), context);
        }
        return context;
      }
    };
  
    template <typename Db, typename FieldSpec>
    inline std::ostream& operator<<(std::ostream& os, const result_field_t<Db, FieldSpec>& rf)
    {
      return serialize(rf, os);
    }
  }  // namespace sqlpp
  #endif
  