Index: source/lib/file/file.cpp
===================================================================
--- source/lib/file/file.cpp
+++ source/lib/file/file.cpp
@@ -29,6 +29,21 @@
 
 #include "lib/file/common/file_stats.h"
 
+#include <string_view>
+
+using namespace std::literals;
+
+// Examples from https://en.wikipedia.org/w/index.php?title=UTF-8&oldid=1100616583#Examples
+static_assert(
+	"\u0024"sv == "\x24"sv &&
+	"\u00A3"sv == "\xC2\xA3"sv &&
+	"\u0939"sv == "\xE0\xA4\xB9"sv &&
+	"\u20AC"sv == "\xE2\x82\xAC"sv &&
+	"\uD55C"sv == "\xED\x95\x9C"sv &&
+	"\U00010348"sv == "\xF0\x90\x8D\x88"sv,
+	"0ad has to be compiled with UTF-8 as character set. "
+	"If you see this message you have to set the according compiler-flag: on msvc /utf-8.");
+
 static const StatusDefinition fileStatusDefinitions[] = {
 	{ ERR::FILE_ACCESS, L"Insufficient access rights to open file", EACCES },
 	{ ERR::FILE_NOT_FOUND, L"No such file or directory", ENOENT }