Added thirdparty: boost library

thirdparty/include/boost/mysql/bad_field_access.hpp

@@ -0,0 +1,28 @@
+//
+// Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
+//
+// 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 BOOST_MYSQL_BAD_FIELD_ACCESS_HPP
+#define BOOST_MYSQL_BAD_FIELD_ACCESS_HPP
+
+#include <exception>
+
+namespace boost {
+namespace mysql {
+
+/// Exception type thrown when trying to access a \ref field
+/// or \ref field_view with an incorrect type.
+class bad_field_access : public std::exception
+{
+public:
+    /// Returns the error message.
+    const char* what() const noexcept override { return "bad_value_access"; }
+};
+
+}  // namespace mysql
+}  // namespace boost
+
+#endif