GScanner.user_data

• buffer
• config
• input_fd
• input_name
• line
• max_parse_errors
• msg_handler
• next_line
• next_position
• next_token
• next_value
• parse_errors
• position
• qdata
• scope_id
• symbol_table
• text
• text_end
• token
• user_data
• value