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

- f -

• f : enum_sum_memo , FLOAT_SWAPPER , load_file_arg
• fbuffer : JSON_ParserStruct
• fd : accept_arg , connect_arg , inetsock_arg , io_internal_read_struct , io_internal_write_struct , no_gvl_stat_data , pty_info , push_glob_args , rb_io_t , read_internal_arg , recvfrom_arg , rsock_send_arg , select_args , waiting_fd
• fd_close : rb_execarg
• fd_dup2 : rb_execarg
• fd_dup2_child : rb_execarg
• fd_open : rb_execarg
• fds : copy_stream_struct
• fdsets : select_args
• feature : autoload_data_i
• features : ruby_cmdline_options
• feedvalue : enumerator
• fffi_arg : fiddle_generic
• fffi_sarg : fiddle_generic
• ffloat : fiddle_generic
• fib : enumerator
• fiber : rb_execution_context_struct
• fiber_machine_stack_size : rb_vm_struct
• fiber_vm_stack_size : rb_vm_struct
• file : no_gvl_stat_data , rb_const_entry_struct , RVALUE
• filename : argf , eval_string_from_file_arg , oldbt_arg , ruby_dtrace_method_hook_args
• fin : cparse_params
• final : sip_interface_st , weakmap
• final_slots : heap_page , rb_objspace
• finalize : rb_io_t
• finalizer_table : rb_objspace
• finalizing : rb_objspace
• finish_func : rb_digest_metadata_t , rb_transcoder
• first_args : rb_thread_struct
• first_column : YYLTYPE
• first_func : rb_thread_struct
• first_line : YYLTYPE
• first_lineno : rb_binding_t , rb_iseq_location_struct
• first_post_arg : rb_args_info
• first_proc : rb_fiber_struct , rb_thread_struct
• flag : rb_call_info , rb_const_entry_struct , Real , StrNode
• flags : _NtCmdLineElement , allocation_info , brace_args , CClassNode , ComplexDateData , DateData , DBM , gc_profile_record , getnameinfo_arg , heap_page , MEMO , OnigEncodingTypeST , push_glob_args , rb_callable_method_entry_struct , rb_cref_struct , rb_data_type_struct , rb_econv_t , rb_env_t , rb_imemo_alloc_struct , rb_iseq_constant_body , rb_iseq_struct , rb_method_entry_struct , rb_objspace , rb_postponed_job_struct , rb_transcoding
• Flags : rb_w32_reparse_buffer_t
• flags : RBasic , RBasicRaw , recvfrom_arg , RIMemo , RNode , rsock_send_arg , RVALUE , SimpleDateData , StringIO , strscanner , vm_ifunc , vm_svar , vm_throw_data , waitpid_arg , zstream
• float_value : bytesequence4_or_float , enum_sum_memo , RFloat
• flonum : RVALUE
• flush : zstream_run_args
• fn : nogvl_ffi_call_args , proc_entry
• fname : load_file_arg , open_struct , sysopen_struct
• for_iseq : iseq_compile_data
• fptr : binwrite_arg , bufread_arg , finish_writeconv_arg , io_encoding_set_args , RFile , udp_arg , udp_send_arg
• frac : Real
• free : ptr_data , RVALUE
• free_next : heap_page
• free_pages : rb_heap_struct
• free_slots : heap_page
• freeable_pages : rb_objspace
• freelist : heap_page , rb_heap_struct
• freeobj_trace : traceobj_arg
• from : OnigPairCaseFoldCodes
• frozen : ibf_object_header
• frozen_string_literal : rb_compile_option_struct
• frozen_strings : rb_vm_struct
• fstr : RSymbol
• full_heap : dump_config
• full_mark : objspace_and_reason
• func : accessor_args , asynchronous_arg_t , end_proc_data , exec_recursive_params , foreach_safe_arg , gen_ivar_tag , glob_args , hash_foreach_arg , INamesArg , magic_comment , MEMO , obj_ivar_tag , oldbt_arg , OnigEndCallListItem , rb_at_exit_list , rb_event_hook_struct , rb_method_cfunc_struct , rb_postponed_job_struct , rb_tp_struct , rb_unblock_callback , root_objects_data , trace_var , update_func_arg , vm_ifunc , zstream
• func_ii : rb_transcoder
• func_io : rb_transcoder
• func_si : rb_transcoder
• func_sio : rb_transcoder
• func_so : rb_transcoder
• funcs : brace_args , tmx
• function : rb_data_type_struct