OZO 「お象」
Boost.Asio and libpq based asynchronous PostgreSQL unofficial header-only C++17 client library.
std::nullopt_t
External adaptors » STL

Description

std::nullopt support

#include <ozo/ext/std/nullopt_t.h>

The std::nullopt_t type is defined as #Nullable which is always in null state.

The ozo::unwrap() function with std::nullopt_t type argument returns std::nullopt.

The std::nullopt_t type is mapped as NULL for PostgreSQL.