Add support for std::filesystem::path

include/soci/std-path.h

@@ -0,0 +1,39 @@
+//
+// Copyright (C) 2023 Elyas El Idrissi
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef SOCI_STD_PATH_H_INCLUDED
+#define SOCI_STD_PATH_H_INCLUDED
+
+#include "soci/type-conversion-traits.h"
+
+#include <filesystem>
+#include <string>
+
+namespace soci
+{
+
+// simple fall-back for std::filesystem::path
+template <>
+struct type_conversion<std::filesystem::path>
+{
+	typedef std::string base_type;
+
+	static void from_base(base_type in, indicator ind, std::filesystem::path & out)
+	{
+		out = ind != i_null ? std::filesystem::path{in} : std::filesystem::path{};
+	}
+
+	static void to_base(std::filesystem::path in, base_type & out, indicator & ind)
+	{
+		out = in.string();
+		ind = i_ok;
+	}
+};
+
+} // namespace soci
+
+#endif // SOCI_STD_PATH_H_INCLUDED