rawARingTower3()

const Ring * rawARingTower3	(	const Ring *	R1,
		engine_RawRingElementArray	eqns )

Definition at line 346 of file aring.cpp.

{
  try
    {
      const M2::ConcreteRing<M2::ARingTower> *K =
          dynamic_cast<const M2::ConcreteRing<M2::ARingTower> *>(R1);
      if (K == nullptr)
        {
          ERROR("expected a tower ring");
          return nullptr;
        }
      const M2::ARingTower &A = K->ring();
 
      std::vector<M2::ARingTower::ElementType> extensions;
 
      for (int i = 0; i < eqns->len; i++)
        {
          const RingElement *f = eqns->array[i];
          M2::ARingTower::ElementType f1;
          if (f->get_ring() != R1)
            {
              ERROR("extension element has incorrect base ring");
              return nullptr;
            }
          A.from_ring_elem(f1, f->get_value());
          extensions.push_back(f1);
        }
      M2::ARingTower *T = M2::ARingTower::create(A, extensions);
      return M2::ConcreteRing<M2::ARingTower>::create(
          std::unique_ptr<M2::ARingTower>(T));
  } catch (const exc::engine_error& e)
    {
      ERROR(e.what());
      return nullptr;
  }
}

References M2::ARingTower::create(), M2::ConcreteRing< RingType >::create(), ERROR, M2::ARingTower::from_ring_elem(), RingElement::get_ring(), RingElement::get_value(), M2::ConcreteRing< RingType >::ring(), and T.