(C : Type u) →
  [inst : CategoryTheory.Category.{v, u} C] →
    [inst_1 : CategoryTheory.Preadditive C] →
      [inst_2 : CategoryTheory.HasShift C ℤ] →
        [∀ (n : ℤ), (CategoryTheory.shiftFunctor C n).Additive] →
          CategoryTheory.HasShift (CategoryTheory.Pretriangulated.Triangle C) ℤ