diff --git a/src/textstream/textstream.h b/src/textstream/textstream.h
index 1970d1a..d62ec97 100644
--- a/src/textstream/textstream.h
+++ b/src/textstream/textstream.h
@@ -86,6 +86,9 @@ public:
 	const_iterator begin() const;
 	const_iterator end() const;
 
+	// IMPROVE ME
+	// add cbegin(), cend(), rbegin(), rend(), crbegin(), crend()
+
 	void to_string(std::string & str,  bool clear_string = true) const;
 	void to_string(std::wstring & str, bool clear_string = true) const;