Enum ErrorKind 

#[non_exhaustive]
pub enum ErrorKind {
    InvalidInput,
    NotFound,
    Conflict,
    Unavailable,
    Internal,
}

Coarse class of an OpError. The HTTP status is a pure function of this class.

Variant	Wire string	HTTP status
InvalidInput	invalid_input	400
NotFound	not_found	404
Conflict	conflict	409
Unavailable	unavailable	503
Internal	internal	500

invalid_input, not_found, and conflict are caller errors (4xx). unavailable and internal are internal errors (5xx).

The enum is non_exhaustive so a later variant does not break a downstream match. The wire spellings stay the five names above. A JSON string outside that set fails deserialization. http_status_code is the only status table.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

InvalidInput

The caller sent a value the operation cannot accept.

NotFound

The named resource does not exist.

Conflict

The operation conflicts with the current state.

Unavailable

A dependency the operation needs is not available.

Internal

The operation failed for a reason the caller cannot fix.

Implementations

impl ErrorKind

pub const fn all() -> &'static [Self]

Every variant this crate defines, in declaration order.

pub const fn http_status_code(self) -> u16

HTTP status that belongs to this kind.

This is the only kind-to-status table. The server conversion reads it through StatusCode::from_u16.

pub const fn is_caller_error(self) -> bool

Returns whether this kind maps to a 4xx status.

Trait Implementations

impl Clone for ErrorKind

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 ErrorKind

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ErrorKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl Eq for ErrorKind

impl Hash for ErrorKind

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 ErrorKind

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ErrorKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ErrorKind