Ruby  2.0.0p594(2014-10-27revision48167)
Data Structures
Here are the data structures with brief descriptions:
[detail level 12]
oC__sbuf
oC__sFILE
oC__siov
oC__suio
oC_BBuf
oC_FreeNode
oC_Node
oC_NtCmdLineElement
oC_OnigStackType
oC_SHA256_CTX
oC_SHA512_CTX
oC_Win32OLEIDispatch
oCaccept_arg
oCaddrinfo
oCafd
oCAnchorNode
oCargf
oCargf_call_arg
oCary_sort_data
oCasciicompat_encoding_t
oCasynchronous_arg_t
oCautoload_const_set_args
oCautoload_data_i
oCbackref_name_tag
oCbig_div_struct
oCBigint
oCbinwrite_arg
oCbrace_args
oCBRefNode
oCbt_iter_arg
oCbufread_arg
oCbytesequence4_or_float
oCC_block
oCcache_entry
oCcall_queue
oCCallNode
oCCClassNode
oCcdhash_set_label_struct
oCcfunc_data
oCCHAR64LONG16
oCchdir_data
oCchild_info
oCChildRecord
oCchown_args
oCchunk_arg
oCcmd_body_arg
oCcmdline_options
oCcollect_caller_bindings_data
oCComplexDateData
oCconnect_arg
oCConsAltNode
oCconstat
oCconv_method_tbl
oCcopy_stream_struct
oCcparse_params
oCCtypeNode
oCDateData
oCdatum
oCDBM
oCdbmdata
oCdefault_encoding
oCDIR
oCdir_data
oCdirect
oCdl_handle
oCdump_arg
oCdump_call_arg
oCeach_obj_args
oCEncloseNode
oCend_proc_data
oCensure_range
oCenumerator
oCequal_data
oCeval_queue
oCeval_string_from_file_arg
oCevloop_params
oCexec_recursive_params
oCFBufferStruct
oCfc_result
oCfiddle_closure
oCfiddle_generic
oCfinish_writeconv_arg
oCflock
oCforce_finalize_list
oCforeach_arg
oCforeach_safe_arg
oCgc_list
oCgc_profile_record
oCgenerator
oCgetaddrinfo_arg
oCgetnameinfo_arg
oCglob_args
oCglob_pattern
oCglobal_variable
oCGroupNumRemap
oCgzfile
oChash_foreach_arg
oCheaps_free_bitmap
oCheaps_header
oCheaps_slot
oChostent_arg
oCIApplyCaseFoldArg
oCIEventSink
oCIEventSinkVtbl
oCINamesArg
oCinetsock_arg
oCinput_code
oCinvoke_info
oCinvoke_queue
oCio_internal_read_struct
oCio_internal_write_struct
oCioctl_arg
oCioinfo
oCiovec
oCiseq_adjust_data
oCiseq_catch_table_entry
oCiseq_compile_data
oCiseq_compile_data_ensure_node_stack
oCiseq_compile_data_storage
oCiseq_inline_cache_entry
oCiseq_insn_data
oCiseq_label_data
oCiseq_line_info_entry
oCiseq_link_anchor
oCiseq_link_element
oCiter_method_arg
oCjoin_arg
oCJSON_Generator_StateStruct
oCJSON_ParserStruct
oCkwtable
oCload_arg
oCload_file_arg
oCloaded_feature_searching
oClocal_vars
oCmagic_comment
oCmark_stack
oCmark_tbl_arg
oCmarshal_compat_t
oCmd5_state_s
oCMETHOD
oCminmax_by_t
oCminmax_t
oCMinMaxLen
oCmsghdr
oCMT
oCmyCPINFOEX
oCNameEntry
oCnative_thread_data_struct
oCnew_wrap_arg_t
oCnkf_buf_t
oCnkf_encoding
oCnkf_native_encoding
oCnkf_state_t
oCNodeBase
oCNodeOptInfo
oCobj_ivar_tag
oColdbt_arg
oColedata
oColeeventdata
oColemethoddata
oColeparam
oColeparamdata
oColetypedata
oColetypelibdata
oColevariabledata
oColevariantdata
oCOnigCaptureTreeNodeStruct
oCOnigCaseFoldCodeItem
oCOnigCompileInfo
oCOnigEncodingTypeST
oCOnigErrorInfo
oCOnigMatchArg
oCOnigMetaCharTableType
oCOnigPairCaseFoldCodes
oCOnigRepeatRange
oCOnigSyntaxType
oCOnigToken
oCOptAncInfo
oCOptEnv
oCOptExactInfo
oCOptMapInfo
oCos_each_struct
oCossl_asn1_info_t
oCossl_verify_cb_args
oCpair_t
oCparser_params
oCPepperInstance
oCpipe_list
oCposix_regmatch_t
oCPosixBracketEntryType
oCptr_data
oCpty_info
oCQtfrNode
oCRArray
oCrawmode_arg_t
oCrb_addrinfo_t
oCrb_args_info
oCrb_backtrace_location_struct
oCrb_backtrace_struct
oCrb_binding_t
oCrb_block_struct
oCrb_blocking_region_buffer
oCrb_call_info_struct
oCrb_classext_struct
oCrb_compile_option_struct
oCrb_const_entry_struct
oCrb_context_struct
oCrb_control_frame_struct
oCrb_data_type_struct
oCrb_debug_inspector_struct
oCrb_deprecated_classext_struct
oCrb_digest_metadata_t
oCrb_econv_elem_t
oCrb_econv_init_by_convpath_t
oCrb_econv_t
oCrb_encoding_entry
oCrb_env_t
oCrb_event_hook_struct
oCrb_exec_arg
oCrb_execarg
oCrb_f_p_arg
oCrb_fiber_struct
oCrb_global_entry
oCrb_global_vm_lock_struct
oCrb_hook_list_struct
oCrb_io_buffer_t
oCrb_io_t
oCrb_iseq_location_struct
oCrb_iseq_struct
oCrb_method_attr_struct
oCrb_method_cfunc_struct
oCrb_method_definition_struct
oCrb_method_entry_struct
oCrb_mutex_struct
oCrb_objspace
oCrb_printf_buffer_extra
oCrb_proc_t
oCrb_random_t
oCrb_thread_cond_struct
oCrb_thread_list_struct
oCrb_thread_lock_union
oCrb_thread_struct
oCrb_tp_struct
oCrb_trace_arg_struct
oCrb_transcoder
oCrb_transcoding
oCrb_unblock_callback
oCrb_vm_protect_tag
oCrb_vm_struct
oCrb_vm_tag
oCRBasic
oCRBignum
oCRClass
oCRComplex
oCRData
oCre_pattern_buffer
oCre_registers
oCread_internal_arg
oCReal
oCrecvfrom_arg
oCreg_named_capture_assign_t
oCrehash_arg
oCrescue_funcall_args
oCRFile
oCRFloat
oCRHash
oCrmatch
oCRMatch
oCrmatch_offset
oCRMD160_CTX
oCRNode
oCRObject
oCrof_data
oCRRational
oCRRegexp
oCrsock_send_arg
oCRString
oCRStruct
oCRTypedData
oCruby_gc_params_t
oCrun_exec_dup2_fd_pair
oCRVALUE
oCScanEnv
oCsearch_path_bfs_t
oCsearch_path_queue_tag
oCseek_arg
oCselect_args
oCset_specifc_data
oCSHA1_CTX
oCshift_var
oCsignals
oCSimpleDateData
oCsip_hash
oCsip_interface_st
oCsip_state
oCsip_uint64_t
oCslicebefore_arg
oCsockaddr_storage
oCsockinet
oCsort_by_data
oCst_hash_type
oCst_packed_entry
oCst_str_end_key
oCst_table
oCst_table_entry
oCstack_chunk
oCstack_node
oCstring_part
oCStringIO
oCStrNode
oCstrscanner
oCsymbols
oCsysopen_struct
oCtagIEVENTSINKOBJ
oCtcltkip
oCth_update_param
oCth_vwait_param
oCthgroup
oCthgroup_list_params
oCthread_call_proc_arg
oCtime_object
oCtimespec
oCtimeval
oCtimezone
oCtms
oCtmx
oCtmx_funcs
oCtoken_assoc
oCtoken_info
oCtotal_data
oCtr
oCtrace_data
oCtrace_var
oCtrans_open_t
oCtranscoder_entry_t
oCtype_cclass_key
oCU
oCudp_arg
oCunlinked_method_entry_list_entry
oCUnsetAddr
oCUnsetAddrList
oCupdate_arg
oCutimbuf
oCutime_args
oCvalued_frame_info
oCvtable
oCvtm
oCwait_data
oCweakmap
oCwgetch_arg
oCwgetstr_arg
oCwindata
oCwrite_arg
oCWSAMSG
oCyaml_alias_data_sThis structure holds aliases data
oCyaml_document_sThe document structure
oCyaml_emitter_sThe emitter structure
oCyaml_event_sThe event structure
oCyaml_mark_sThe pointer position
oCyaml_node_pair_sAn element of a mapping node
oCyaml_node_sThe node structure
oCyaml_parser_sThe parser structure
oCyaml_simple_key_sThis structure holds information about a potential simple key
oCyaml_string_t
oCyaml_tag_directive_sThe tag directive data
oCyaml_token_sThe token structure
oCyaml_version_directive_sThe version directive data
oCyielder
oCyyalloc
oCYYSTYPE
oCzone
oCzstream
\Czstream_run_args