row_types.hpp

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#pragma once
 
/// @file userver/storages/sqlite/row_types.hpp
/// @brief Helper tags to disambiguate result extraction between row and field.
 
#include <tuple>
#include <type_traits>
 
USERVER_NAMESPACE_BEGIN
 
namespace storages::sqlite {
 
/// Used for extracting statement results as a single field.
struct FieldTag {};
/// Used for extracting statement results as rows.
struct RowTag {};
 
inline constexpr FieldTag kFieldTag;
inline constexpr RowTag kRowTag{};
 
template <typename T>
struct IsTuple : std::false_type {};
 
template <typename... Args>
struct IsTuple<std::tuple<Args...>> : std::true_type {};
 
}  // namespace storages::sqlite
 
USERVER_NAMESPACE_END