Method push

packages/compiler/src/template/pipeline/ir/src/operations.ts:89–112

* Push a new operation to the tail of the list.

(op: OpT | Array<OpT>)

   * Push a new operation to the tail of the list.
   */
  push(op: OpT | Array<OpT>): void {
    if (Array.isArray(op)) {
      for (const o of op) {
        this.push(o);
      }
      return;
    }

    OpList.assertIsNotEnd(op);
    OpList.assertIsUnowned(op);

    op.debugListId = this.debugListId;

    // The old "previous" node (which might be the head, if the list is empty).
    const oldLast = this.tail.prev!;

    // Insert `op` following the old last node.
    op.prev = oldLast;
    oldLast.next = op;

    // Connect `op` with the list tail.
    op.next = this.tail;
    this.tail.prev = op;
  }

  /**
   * Prepend one or more nodes to the start of the list.