/**
 * @file mix_cc/sql/statement.h
 * @brief 语句类基类
 * @author Cat (null.null.null@qq.com)
 * @version 0.1
 * @date 2021-09-17
 *
 * Copyright: Baosight Co. Ltd.
 * DO NOT COPY/USE WITHOUT PERMISSION
 *
 */
#pragma once
#include <mix_cc/sql/public.h>
namespace mix_cc {
namespace sql {

struct statement_t {};

template <typename PrevStatement>
struct prev_statement_t {
  explicit constexpr prev_statement_t(PrevStatement prev_st)
      : prev_st_(prev_st) {}

  constexpr auto parse_prev() {
    return hana::flatten(
        hana::make_tuple(prev_st_.parse_prev(), hana::make_tuple(prev_st_)));
  }

 protected:
  PrevStatement prev_st_;
};

template <>
struct prev_statement_t<void> {
  constexpr prev_statement_t() {}
  constexpr auto parse_prev() { return hana::make_tuple(); }
};

template <typename Tp>
constexpr auto get_value(Tp val) {
  return val;
}
}  // namespace sql
}  // namespace mix_cc