Enum IrErrorCode 

pub enum IrErrorCode {
    ParseError,
    InvalidRequest,
    MethodNotFound,
    InvalidParams,
    InternalError,
    Implementation(i64),
    Other(i64),
}

A JSON-RPC error code.

Variants

ParseError

-32700, invalid JSON.

InvalidRequest

-32600, the envelope was not a valid request object.

MethodNotFound

-32601, the method does not exist.

InvalidParams

-32602, the params did not match the method.

InternalError

-32603, an internal error.

Implementation(i64)

A code in the implementation-defined -32000..=-32099 range.

The raw code, not an offset into the range. Storing the code means code and from_code are both an identity, so there is no arithmetic to get backwards and no narrowing cast to make: the range runs downwards from -32000, and a representation that hid that as an offset is exactly the kind of thing that ends up adding instead of subtracting and putting offset 99 at -31901, outside the reserved range.

Other(i64)

A code outside every range the spec reserves.

Implementations

impl IrErrorCode

pub const UNSUPPORTED_PROTOCOL_VERSION: Self

-32022, SEP-2575’s unsupported-protocol-version code.

Named rather than written at each use because the specification gives it meaning rather than just a number: it is the code that carries data.supported, so a client knows to retry against a revision this server speaks instead of hunting for a bug in its own request. A bare -32022 at a call site reads as a typo, and this one is easy to typo.

It lives in the implementation-defined range, which is why it is Implementation and not a named variant of its own: a new variant would be a promise that no other code can hold, since nothing stops a peer sending this number for an unrelated reason.

pub const HEADER_MISMATCH: Self

-32020, HeaderMismatchError (2026-07-28).

An HTTP header disagrees with the body it describes, or a required one is missing. Renumbered from -32001 when the revision partitioned the server-error range; see that revision’s changelog, minor change 12.

pub const MISSING_REQUIRED_CLIENT_CAPABILITY: Self

-32021, MissingRequiredClientCapabilityError (2026-07-28).

Serving the request needs a capability the client did not declare in its per-request clientCapabilities. Carries data.requiredCapabilities, a ClientCapabilities object.

pub const fn code(self) -> i64

The numeric wire value.

pub fn from_code(code: i64) -> Self

The code a raw number denotes.

Not const: RangeInclusive::contains is not a const fn on 1.98, and nothing evaluates this at compile time.

Trait Implementations

impl Clone for IrErrorCode

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IrErrorCode

impl Debug for IrErrorCode

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

Formats the value using the given formatter.

impl Eq for IrErrorCode

impl Hash for IrErrorCode

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 Ord for IrErrorCode

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for IrErrorCode

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for IrErrorCode

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for IrErrorCode