Method MakeBuilder

cpp/src/arrow/json/parser.cc:472–478

  /// construct a builder of statically defined kind
  template <Kind::type kind>
  Status MakeBuilder(int64_t leading_nulls, BuilderPtr* builder) {
    builder->index = static_cast<uint32_t>(arena<kind>().size());
    builder->kind = kind;
    builder->nullable = true;
    arena<kind>().emplace_back(RawArrayBuilder<kind>(&context_));
    return Cast<kind>(*builder)->AppendNull(leading_nulls);
  }

  /// construct a builder of whatever kind corresponds to a DataType
  Status MakeBuilder(const DataType& t, int64_t leading_nulls, BuilderPtr* builder) {