Method operator[]

tools/flatbuffers_backed_impl.cc:105–131

  }

  absl::optional<CelValue> operator[](CelValue cel_key) const override {
    if (!cel_key.IsString()) {
      return CreateErrorValue(
          arena_, absl::InvalidArgumentError(
                      absl::StrCat("Invalid map key type: '",
                                   CelValue::TypeName(cel_key.type()), "'")));
    }
    const absl::string_view key = cel_key.StringOrDie().value();
    const auto it = std::lower_bound(
        list_->begin(), list_->end(), key,
        [this](const flatbuffers::Table* t, const absl::string_view key) {
          auto value = flatbuffers::GetFieldS(*t, index_);
          auto sv = value ? absl::string_view(value->c_str(), value->size())
                          : absl::string_view();
          return sv < key;
        });
    if (it != list_->end()) {
      auto value = flatbuffers::GetFieldS(**it, index_);
      auto sv = value ? absl::string_view(value->c_str(), value->size())
                      : absl::string_view();
      if (sv == key) {
        return CelValue::CreateMap(google::protobuf::Arena::Create<FlatBuffersMapImpl>(
            arena_, **it, schema_, object_, arena_));
      }
    }
    return absl::nullopt;
  }

  absl::StatusOr<const CelList*> ListKeys() const override { return &keys_; }