Enum ruby_rarray_flags 

#[repr(u32)]
pub enum ruby_rarray_flags {
    RARRAY_EMBED_FLAG = 8_192,
    RARRAY_EMBED_LEN_MASK = 4_161_536,
    RARRAY_TRANSIENT_FLAG = 33_554_432,
}

---

Private

Bits that you can set to ::RBasic::flags.

@warning These enums are not the only bits we use for arrays.

@internal

Unlike strings, flag usages for arrays are scattered across the entire source codes. @shyouhei doesn’t know the complete list. But what is listed here is at least incomplete.

Generated by rb-sys for Ruby mri-x86_64-linux-gnu-3.2.3

Variants

RARRAY_EMBED_FLAG = 8_192

This flag has something to do with memory footprint. If the array is “small” enough, ruby tries to be creative to abuse padding bits of struct ::RArray for storing its contents. This flag denotes that situation.

@warning This bit has to be considered read-only. Setting/clearing this bit without corresponding fix up must cause immediate SEGV. Also, internal structures of an array change dynamically and transparently throughout of its lifetime. Don’t assume it being persistent.

@internal

3rd parties must not be aware that there even is more than one way to store array elements. It was a bad idea to expose this to them.

Generated by rb-sys for Ruby mri-x86_64-linux-gnu-3.2.3

RARRAY_EMBED_LEN_MASK = 4_161_536

---

Generated by rb-sys for Ruby mri-x86_64-linux-gnu-3.2.3

RARRAY_TRANSIENT_FLAG = 33_554_432

This flag has something to do with an array’s “transiency”. A transient array is an array of young generation (of generational GC), who stores its elements inside of dedicated memory pages called a transient heap. Not every young generation share that storage scheme, but elder generations must no join.

@internal

3rd parties must not be aware that there even is more than one way to store array elements. It was a bad idea to expose this to them.

Generated by rb-sys for Ruby mri-x86_64-linux-gnu-3.2.3

Trait Implementations

impl Clone for ruby_rarray_flags

fn clone(&self) -> ruby_rarray_flags

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ruby_rarray_flags

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for ruby_rarray_flags

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ruby_rarray_flags

fn eq(&self, other: &ruby_rarray_flags) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ruby_rarray_flags

impl Eq for ruby_rarray_flags

impl StructuralPartialEq for ruby_rarray_flags