Add support for bool

include/soci/bool.h

@@ -0,0 +1,36 @@
+//
+// 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_BOOL_H_INCLUDED
+#define SOCI_BOOL_H_INCLUDED
+
+#include "soci/type-conversion-traits.h"
+
+namespace soci
+{
+
+// simple fall-back for bool
+template <>
+struct type_conversion<bool>
+{
+	typedef short base_type;
+
+	static void from_base(base_type in, indicator ind, bool & out)
+	{
+		out = ind != i_null ? static_cast<bool>(in) : false;
+	}
+
+	static void to_base(bool in, base_type & out, indicator & ind)
+	{
+		out = static_cast<base_type>(in);
+		ind = i_ok;
+	}
+};
+
+} // namespace soci
+
+#endif // SOCI_BOOL_H_INCLUDED