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    assert(ARY_SHARED_ROOT_P(_value_)); \

    RB_OBJ_WRITE(_ary_, &RARRAY(_ary_)->as.heap.aux.shared, _value_); \

} while (0)

#define ARY_SHARED_ROOT_P(ary) (FL_TEST((ary), RARRAY_SHARED_ROOT_FLAG))

#define ARY_SHARED_NUM(ary) \

    (assert(ARY_SHARED_ROOT_P(ary)), RARRAY(ary)->as.heap.aux.shared_num)

    /* RUBY_FL_USER2 is for ELTS_SHARED */

    RARRAY_EMBED_LEN_MASK = (RUBY_FL_USER4|RUBY_FL_USER3),

    RARRAY_EMBED_LEN_SHIFT = (RUBY_FL_USHIFT+3),

#if USE_TRANSIENT_HEAP

    RARRAY_TRANSIENT_FLAG = RUBY_FL_USER13,

#define RARRAY_EMBED_LEN_MASK (VALUE)RARRAY_EMBED_LEN_MASK

#define RARRAY_EMBED_LEN_MAX RARRAY_EMBED_LEN_MAX

#define RARRAY_EMBED_LEN_SHIFT RARRAY_EMBED_LEN_SHIFT

struct RArray {

    struct RBasic basic;