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

std::optional type support

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

The std::optional<T> type is defined as #Nullable and uses default implementation of related functions.

The ozo::unwrap() function is implemented via the dereference operator.