Method isVariantTy

include/ast/component/type.h:286–288

    return std::holds_alternative<RecordTy>(Type);
  }
  bool isVariantTy() const noexcept {
    return std::holds_alternative<VariantTy>(Type);
  }
  bool isListTy() const noexcept {
    return std::holds_alternative<ListTy>(Type);
  }