/// Callback executed by the Lua syntax() function. /// /// \param syntax_version The syntax format version as provided by the /// configuration file in the call to syntax(). void syntax_callback(const int syntax_version) { if (_syntax_called) throw syntax_error("syntax() can only be called once"); _syntax_called = true; // Allow the parser caller to populate the tree with its own schema // depending on the format/version combination. _parent->setup(_tree, syntax_version); // Export the config module to the Lua state so that all global variable // accesses are redirected to the configuration tree. config::redirect(_state, _tree); }