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

- d -

• data : rb_data_type_struct, rb_memory_view_t, RTypedData
• dcompact : rb_data_type_struct
• def_keyword_loc : pm_def_node
• default_seed_bits : rb_random_interface_t
• define() : ruby::backward::cxxanyargs::define_method::driver0< T, F >::engine< N, U >, ruby::backward::cxxanyargs::define_method::driver< T, F >::engine< N, U >
• delimiter_loc : pm_constant_path_node, pm_constant_path_target_node
• denominator : pm_rational_node
• depth : pm_local_variable_and_write_node, pm_local_variable_operator_write_node, pm_local_variable_or_write_node, pm_local_variable_read_node, pm_local_variable_target_node, pm_local_variable_write_node
• dfree : rb_data_type_struct
• dmark : rb_data_type_struct
• do_keyword_loc : pm_for_node, pm_until_node, pm_while_node
• dsize : rb_data_type_struct