class RubyVM::Shape Constants OBJ_TOO_COMPLEX_SHAPE_ID SHAPE_FLAG_SHIFT SHAPE_FROZEN SHAPE_ID_NUM_BITS SHAPE_IVAR SHAPE_MAX_VARIATIONS SHAPE_ROOT SHAPE_T_OBJECT SPECIAL_CONST_SHAPE_ID Attributes capacity [RW] edge_name [RW] id [RW] next_iv_index [RW] parent_id [RW] size_pool_index [RW] type [RW]