Here is a list of all struct and union fields with links to the structures/unions they belong to:

### - d -

- d : U
- d_ino : direct
- d_isdir : direct
- d_isrep : direct
- d_name : direct
- d_namlen : direct
- dat : tmx
- data : end_proc_data , RTypedData , rb_event_hook_struct , parser_xtra , dump_arg , load_arg , emitter_xtra , trace_var , global_variable , _syck_node , RVALUE , each_obj_args , RData , rb_data_type_struct
- ddouble : fiddle_generic
- debug : cparse_params , rb_vm_struct
- debug_level : rb_compile_option_struct
- debug_lines : parser_params
- def : rb_method_entry_struct
- DefaultChar : myCPINFOEX
- deferred : rb_objspace
- defined_method_id : rb_iseq_struct
- den : RRational
- depth : JSON_Generator_StateStruct
- dest : dump_arg
- destination_encoding : rb_econv_t
- destination_encoding_name : rb_econv_t
- df : ComplexDateData
- dfp : rb_control_frame_t , rb_block_struct
- dfree : RData , rb_data_type_struct
- di_dbm : dbmdata
- di_size : dbmdata
- digest_len : rb_digest_metadata_t
- digits : RBignum
- dir : dir_data
- dirbno : DBM
- dirbuf : DBM
- dirf : DBM
- dirstr : DIR
- disable : cmdline_options
- discard_ilseq : rb_iconv_opt_t
- dispatch : _Win32OLEIDispatch
- dmark : RData , rb_data_type_struct
- dmax : re_pattern_buffer
- dmin : re_pattern_buffer
- dname : transcoder_entry_t
- do_heap_free : rb_objspace
- do_line : cmdline_options
- do_loop : cmdline_options
- do_print : cmdline_options
- do_search : cmdline_options
- do_split : cmdline_options
- domain : _syck_level
- done : chdir_data , thread_call_proc_arg , th_vwait_param , th_update_param , call_queue , invoke_queue , eval_queue
- dont_gc : rb_objspace
- dont_lazy_sweep : rb_objspace
- dp : oleparam
- dptr : datum
- dsize : rb_data_type_struct , datum
- dst : enumerator , copy_stream_struct
- dst_encoding : rb_transcoder
- dst_fd : copy_stream_struct
- dummy_for_alignment : rb_transcoding::rb_transcoding_state_t
- dump : cmdline_options
- dumper : marshal_compat_t
- during_gc : rb_objspace
- dwBufferCount : WSAMSG
- dwCookie : oleeventdata
- dwFlags : WSAMSG