Update Nemirtingas overlay to latest.

overlay_experimental/System/Encoding.hpp

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) Nemirtingas
+ * This file is part of System.
+ *
+ * System is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * System is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the System; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <string>
+
+namespace System {
+namespace Encoding {
+
+std::wstring Utf8ToWChar(std::string const& str);
+
+std::u16string Utf8ToUtf16(std::string const& str);
+
+std::u32string Utf8ToUtf32(std::string const& str);
+
+std::string WCharToUtf8(std::wstring const& str);
+
+std::string Utf16ToUtf8(std::u16string const& str);
+
+std::string Utf32ToUtf8(std::u32string const& str);
+
+// Size of UTF8 chars (not the size of the byte buffer).
+size_t EncodedLength(std::string const& str);
+
+}
+}