Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

- m -

• mark : rb_ractor_local_storage_type
• maxfd : rb_fdset_t
• maximum : pm_numbered_parameters_node
• message : pm_diagnostic_data_t
• message_loc : pm_call_and_write_node, pm_call_node, pm_call_operator_write_node, pm_call_or_write_node, pm_call_target_node
• mode : rb_io
• module_keyword_loc : pm_module_node