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

- r -

• rbuf : rb_io
• read_name : pm_call_and_write_node, pm_call_operator_write_node, pm_call_or_write_node
• readconv : rb_io
• readonly : rb_memory_view_t
• reads : pm_local_t
• receiver : pm_call_and_write_node, pm_call_node, pm_call_operator_write_node, pm_call_or_write_node, pm_call_target_node, pm_def_node, pm_index_and_write_node, pm_index_operator_write_node, pm_index_or_write_node, pm_index_target_node
• recovering : pm_parser
• reference : pm_rescue_node
• regexp : RMatch
• regexp_buffer : pm_regexp_token_buffer_t
• regexp_nodes : pm_static_literals_t
• regs : rb_matchext_struct
• release_func : rb_memory_view_entry
• repeat : rb_memory_view_item_component_t
• requireds : pm_array_pattern_node, pm_find_pattern_node, pm_parameters_node
• rescue_clause : pm_begin_node
• rescue_expression : pm_rescue_modifier_node
• reserved : rb_data_type_struct
• rest : pm_array_pattern_node, pm_hash_pattern_node, pm_multi_target_node, pm_multi_write_node, pm_parameters_node
• right : pm_alternation_pattern_node, pm_and_node, pm_binding_powers_t, pm_find_pattern_node, pm_flip_flop_node, pm_or_node, pm_range_node
• rights : pm_multi_target_node, pm_multi_write_node
• rparen_loc : pm_def_node, pm_defined_node, pm_multi_target_node, pm_multi_write_node, pm_pinned_expression_node, pm_super_node, pm_yield_node
• rust_closure : MMTk_ObjectClosure