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

race : Account_Char , object
races : struct_race_list
random() : Messages
random_seed : RMParms
randomitems : object
range : object , selection , statsinfo
range_modifier : object
ranges : player
read : mtar_t
readable : struct_map_info
real_wiz : Settings
recursive_update() : Archetypes
recycle_tmp_maps : Settings
ref_count : Account_Chars
refcount : shared_string
reference_count : archetype
reg : Crossfire_Region , struct_region_info
region : mapstruct , RMParms
regions : Settings
registration : registered_command
rejoin_party : player
remaining_data : mtar_t
repeat : selection
repeat_action : player
repeat_func : player
repeat_func_data : player
replace() : AllAnimations , Archetypes , AssetsCollection< T, Key > , Faces , Facesets , Messages , Quests , Treasures
replies : struct_dialog_message , talk_info
replies_count : talk_info
replies_words : talk_info
reply : struct_dialog_reply
require_count : type_definition
required : type_definition
reset_group : mapstruct , struct_map_info
reset_loc_time : Settings
reset_time : mapstruct
reset_timeout : mapstruct
resist : object
resurrection : Settings
returnvalue : CFPContext
roll_stat_points : Settings
room_free_spots_x : free_spots_struct
room_free_spots_y : free_spots_struct
rtype : Room
rules : Settings
run_away : object
run_on : player