Method DelayedExtend

r/src/r_to_arrow.cpp:255–258

by default, just delay the ->Extend(), i.e. not run in parallel implementations might redefine so that ->Extend() is run in parallel

  // by default, just delay the ->Extend(), i.e. not run in parallel
  // implementations might redefine so that ->Extend() is run in parallel
  virtual void DelayedExtend(SEXP values, int64_t size, RTasks& tasks) {
    auto task = [this, values, size]() { return this->Extend(values, size); };
    tasks.Append(false, task);
  }

  virtual Status ExtendMasked(SEXP values, SEXP mask, int64_t size, int64_t offset = 0) {
    return Status::NotImplemented("ExtendMasked");