Enum MessageKind 

#[repr(u8)]
pub enum MessageKind {
    Query = 1,
    Result = 2,
    Error = 3,
    BulkInsert = 4,
    BulkOk = 5,
    BulkInsertBinary = 6,
    QueryBinary = 7,
    BulkInsertPrevalidated = 8,
    BulkStreamStart = 9,
    BulkStreamRows = 10,
    BulkStreamCommit = 11,
    BulkStreamAck = 12,
    Prepare = 13,
    PreparedOk = 14,
    ExecutePrepared = 15,
    Hello = 16,
    HelloAck = 17,
    AuthRequest = 18,
    AuthResponse = 19,
    AuthOk = 20,
    AuthFail = 21,
    Bye = 22,
    Ping = 23,
    Pong = 24,
    Get = 25,
    Delete = 26,
    DeleteOk = 27,
    Cancel = 32,
    Compress = 33,
    SetSession = 34,
    Notice = 35,
    RowDescription = 36,
    StreamEnd = 37,
    VectorSearch = 38,
    GraphTraverse = 39,
    QueryWithParams = 40,
}

Single-byte message-kind discriminator. Numeric values are part of the wire spec — never repurpose a value once shipped.

Variants

Query = 1

Result = 2

Error = 3

BulkInsert = 4

BulkOk = 5

BulkInsertBinary = 6

QueryBinary = 7

BulkInsertPrevalidated = 8

BulkStreamStart = 9

BulkStreamRows = 10

BulkStreamCommit = 11

BulkStreamAck = 12

Prepare = 13

PreparedOk = 14

ExecutePrepared = 15

Hello = 16

HelloAck = 17

AuthRequest = 18

AuthResponse = 19

AuthOk = 20

AuthFail = 21

Bye = 22

Ping = 23

Pong = 24

Get = 25

Delete = 26

DeleteOk = 27

Cancel = 32

Compress = 33

SetSession = 34

Notice = 35

RowDescription = 36

StreamEnd = 37

VectorSearch = 38

GraphTraverse = 39

QueryWithParams = 40

Implementations

impl MessageKind

pub fn class(&self) -> MessageClass

Routing class derived from the comment-grouped wire ranges.

pub fn allowed_flags(&self) -> Flags

Bitset of Flags values this kind may legitimately carry.

Pinned conservatively: MORE_FRAMES is universal (any frame may be split), but COMPRESSED is whitelisted only on kinds whose payloads are big enough to benefit from compression. Handshake/lifecycle payloads (Hello, AuthRequest, Ping, …) are tiny and stay uncompressed today; future contributors who want to flip that decision must update both the matrix and the unit tests that pin it.

pub fn is_handshake(&self) -> bool

true when this kind belongs to the handshake/lifecycle group (Hello, AuthRequest, AuthOk, …, Bye, Ping, Pong). Equivalent to class() == MessageClass::Handshake and exists so dispatch sites can read the predicate without importing MessageClass.

pub fn permits_flags(&self, flags: Flags) -> bool

true when every flag bit in flags is in allowed_flags(). The catalog is the single source of truth for which flag bits a kind may carry; both the codec (decode side) and the builder (encode side) consult this so a misframed frame fails at the boundary rather than reaching the dispatch arms.

pub fn direction(&self) -> MessageDirection

Which peer is allowed to originate this kind.

pub fn from_u8(byte: u8) -> Option<Self>

Trait Implementations

impl Clone for MessageKind

fn clone(&self) -> MessageKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MessageKind

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

Formats the value using the given formatter.

impl PartialEq for MessageKind

fn eq(&self, other: &MessageKind) -> 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 MessageKind

impl Eq for MessageKind

impl StructuralPartialEq for MessageKind