Enum ErrorKind 

#[non_exhaustive]
pub enum ErrorKind {
    Custom,
    NullabilityViolation {
        field: Option<String>,
    },
    MissingField {
        field: String,
    },
}

Classifies an error for pattern matching

Use Error::kind() to get the kind of an error for matching.

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.

Custom

A generic error with a custom message

NullabilityViolation

Attempted to write null to a non-nullable field

Fields

field: Option<String>

The field name, if known

MissingField

Missing required field in struct

Fields

field: String

The name of the missing field

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> ErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Eq for ErrorKind

impl PartialEq for ErrorKind

fn eq(&self, other: &ErrorKind) -> 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 StructuralPartialEq for ErrorKind