Update .clang-format

.clang-format

@@ -114,5 +114,5 @@ SpacesInParentheses: false
 SpacesInSquareBrackets: false
 Standard: Latest
 TabWidth: 4
-UseTab: AlignWithSpaces
+UseTab: ForIndentation
 ...

core-library/traits/function-traits.h

@@ -50,12 +50,12 @@ struct function_traits<Ret (Class::*)(Arg0, Args...) const>
 };
 
 template<typename T>
-using return_type_t = typename function_traits<T>::return_type;
+using return_type_t = typename function_traits<std::remove_cvref_t<T>>::return_type;
 
 template<typename T>
-using first_argument_type_t = typename function_traits<T>::first_argument_type;
+using first_argument_type_t = typename function_traits<std::remove_cvref_t<T>>::first_argument_type;
 
 template<typename T, typename Arg>
-concept callable_with_converted_argument = requires(T&& callable, Arg&& arg) { callable(typename traits::first_argument_type_t<T>{arg}); };
+concept callable_with_argument_converted = requires(T&& callable, Arg&& arg) { callable(core::first_argument_type_t<T>{arg}); };
 
 }

core-library/views/trim-elements-view.h

@@ -5,8 +5,8 @@ namespace core {
 
 template<std::ranges::forward_range Range>
     requires requires(Range&& range) {
-		(void)range.empty();
+	    range.empty();
-		(void)trim_view{(*std::begin(range))};
+	    trim_view{(*std::begin(range))};
     }
 class trim_elements_view : public std::ranges::view_interface<trim_elements_view<Range>>
 {