namespace generator {
namespace cpp {

string OpRenderer::Signature() const {
  std::vector<string> args_with_default_val;
  std::vector<string> args_without_default_val;
  for (OpArgumentView const& argument : op_.AllArguments()) {
    string text = argument.Declaration();
    if (context_.mode == RendererContext::kHeader) {
      absl::StrAppend(&text, argument.Initializer());
    }
    if (argument.HasDefaultValue()) {

        builder.args == []
    }

    def convertsArgsToString() {
        when:
        builder.args(['1', 2, "${3}"])

        then:
        builder.args == ['1', '2', '3']
        builder.allArguments == ['1', '2', '3']
    }

  explicit OpView(OpSpec op);

  const std::vector<ArgView> &Inputs() const;
  const std::vector<ArgView> &Outputs() const;
  const std::vector<AttrView> &Attributes() const;
  const std::vector<OpArgumentView> &AllArguments() const;

  int NumInputs() const;
  int NumOutputs() const;
  ArgView OnlyInput() const;
  ArgView OnlyOutput() const;

  string FunctionName() const;
  string VariableName() const;

const std::vector<ArgView>& OpView::Outputs() const { return output_args_; }

const std::vector<AttrView>& OpView::Attributes() const {
  return argument_attrs_;
}

const std::vector<OpArgumentView>& OpView::AllArguments() const {
  return all_arguments_;
}

int OpView::NumInputs() const { return input_args_.size(); }

int OpView::NumOutputs() const { return output_args_.size(); }

ArgView OpView::OnlyInput() const {