Primary template for declaring mapping to a PostgreSQL user type.
Must contain a static constexpr DBTypeName postgres_name member.
For more information see uPg: PostgreSQL user type mappings
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.
Definition at line 25 of file io_fwd.hpp.