...

common/adc_traits.h

@@ -42,6 +42,10 @@ concept adc_input_char_range =
     std::ranges::input_range<R> && std::is_same_v<std::remove_cv_t<std::ranges::range_value_t<R>>, CharT>;
 
 
+template <typename R>
+concept adc_char_view = std::ranges::view<R> && std::same_as<std::ranges::range_value_t<R>, char>;
+
+
 // deduce returned type of callable
 // template <typename T>
 // using adc_retval_t = std::invoke_result_t<std::remove_cvref_t<T>>;