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 SQLPP_MIN_H
  #define SQLPP_MIN_H
  
  #include <sqlpp11/type_traits.h>
  #include <sqlpp11/char_sequence.h>
  
  namespace sqlpp
  {
    struct min_alias_t
    {
      struct _alias_t
      {
        static constexpr const char _literal[] = "min_";
        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
        template <typename T>
        struct _member_t
        {
          T min;
          T& operator()()
          {
            return min;
          }
          const T& operator()() const
          {
            return min;
          }
        };
      };
    };
  
    template <typename Expr>
    struct min_t : public expression_operators<min_t<Expr>, value_type_of<Expr>>, public alias_operators<min_t<Expr>>
    {
      using _traits = make_traits<value_type_of<Expr>, tag::is_expression, tag::is_selectable>;
      using _nodes = detail::type_vector<Expr, aggregate_function>;
      using _can_be_null = std::true_type;
      using _is_aggregate_expression = std::true_type;
  
      using _auto_alias_t = min_alias_t;
  
      min_t(Expr expr) : _expr(expr)
      {
      }
  
      min_t(const min_t&) = default;
      min_t(min_t&&) = default;
      min_t& operator=(const min_t&) = default;
      min_t& operator=(min_t&&) = default;
      ~min_t() = default;
  
      Expr _expr;
    };
  
    template <typename Context, typename Expr>
    struct serializer_t<Context, min_t<Expr>>
    {
      using _serialize_check = serialize_check_of<Context, Expr>;
      using T = min_t<Expr>;
  
      static Context& _(const T& t, Context& context)
      {
        context << "MIN(";
        serialize(t._expr, context);
        context << ")";
        return context;
      }
    };
  
    template <typename T>
    auto min(T t) -> min_t<wrap_operand_t<T>>
    {
      static_assert(not contains_aggregate_function_t<wrap_operand_t<T>>::value,
                    "min() cannot be used on an aggregate function");
      static_assert(is_expression_t<wrap_operand_t<T>>::value, "min() requires an expression as argument");
      return {t};
    }
  }
  
  #endif
  