Function release

common/memory.h:556–559

Relinquishes ownership of `T*`, returning it. If `T` was allocated and constructed using an arena, no further action is required. If `T` was allocated and constructed without an arena, the caller must eventually call `delete`.

  // allocated and constructed without an arena, the caller must eventually call
  // `delete`.
  ABSL_MUST_USE_RESULT T* release() noexcept {
    PreRelease();
    return std::exchange(ptr_, nullptr);
  }

  void reset() noexcept { reset(nullptr); }