std::unique_ptr depends on template type since 1.2.0 std::shared_ptr depends on template type since 1.2.0 boost type msgpack::object type note string_ref str since 1.2.0 string_view str since 2.1.0 ...

std::unique_ptr depends on template type since 1.2.0 std::shared_ptr depends on template type since 1.2.0 boost type msgpack::object type note string_ref str since 1.2.0 optional depends on optional ...