diff -r e254398fcc7c -r 20ca0a6be175 sources/list.h
--- a/sources/list.h	Wed Jan 27 13:17:11 2021 +0200
+++ b/sources/list.h	Wed Jan 27 14:04:53 2021 +0200
@@ -30,6 +30,7 @@
 
 #pragma once
 #include <vector>
+#include <string>
 #include "basics.h"
 #include "range.h"
 BEGIN_ZFC_NAMESPACE
@@ -44,7 +45,7 @@
 }
 
 using ByteArray = std::vector<unsigned char>;
-class String quote(const ByteArray& bytes);
+std::string quote(const ByteArray& bytes);
 
 template<typename T>
 T splice(const T& container, int start, int end, int step = 1)