Sanitize meta characters on debug print

Author: saki7

include/iris/x4/debug/print_attribute.hpp

@@ -25,6 +25,10 @@
 
 #include <iris/bits/specialization_of.hpp>
 
+#include <concepts>
+#include <ostream>
+#include <format>
+#include <ranges>
 #include <print>
 #include <iterator>
 #include <memory>
@@ -147,6 +151,15 @@ inline void print_chars(std::ostream& os, char32_t const ch)
     iris::unicode::append8(ch, std::ostreambuf_iterator(os));
 }
 
+template<std::ranges::forward_range R>
+    requires std::same_as<std::ranges::range_value_t<R>, char32_t>
+void print_chars(std::ostream& os, R const& chars)
+{
+    for (char32_t ch : chars) {
+        x4::print_chars(os, ch);
+    }
+}
+
 template<std::forward_iterator It, std::sentinel_for<It> Se>
 void print_chars(std::ostream& os, It it, Se const se, std::size_t const max_code_points)
 {
@@ -234,11 +247,14 @@ struct print_attribute_debug
             if (!ptr) {
                 out << "nullptr";
             } else {
-                print_attribute_debug<typename std::pointer_traits<T>::element_type>::call(out, *ptr);
+                x4::print_attribute(out, *ptr);
             }
 
         } else if constexpr (std::formattable<T, char>) {
-            std::format_to(std::ostreambuf_iterator{out}, "{}", val);
+            x4::print_chars(out, iris::unicode::transcode<char32_t>(std::format("{}", val)));
+
+        } else if constexpr (iris::StringLike<T>) {
+            x4::print_chars(out, iris::unicode::transcode_ref<char32_t>(val));
 
         } else {
             // TODO: https://github.com/iris-cpp/iris/issues/51
@@ -260,7 +276,7 @@ struct print_attribute_debug
     static void call(std::ostream& out, T_ const& val)
     {
         if constexpr (iris::StringLike<T_>) {
-            out << iris::unicode::transcode_ref<char>(std::basic_string_view{val});
+            x4::print_chars(out, iris::unicode::transcode_ref<char32_t>(val));
 
         } else {
             out << '[';