io_fwd.hpp

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#pragma once
 
/// @file userver/storages/postgres/io/io_fwd.hpp
/// @brief Forward declarations of types for PostgreSQL mappings.
/// @ingroup userver_postgres_parse_and_format
 
USERVER_NAMESPACE_BEGIN
 
namespace storages::postgres::io {
 
/// @brief Primary template for declaring mapping to a PostgreSQL system type.
template <typename T>
struct CppToSystemPg;
 
/// @brief Primary template for declaring mapping to a PostgreSQL user type.
///
/// Must contain a `static constexpr DBTypeName postgres_name` member.
///
/// For more information see @ref scripts/docs/en/userver/pg/user_types.md
///
/// For enumerated types must derive from EnumMappingBase template and have a
/// `static constexpr EnumeratorList enumerators` member. The EnumeratorList
/// is a type alias declared in EnumMappingBase.
template <typename T>
struct CppToUserPg;
 
}  // namespace storages::postgres::io
 
USERVER_NAMESPACE_END