Struct ValidationError 

pub struct ValidationError(/* private fields */);

An error type that describes why an crate::Entry isn’t valid. This can be because it violated general contracts (e.g. writing multiple values with the same name) or because it violated a format-specific contract (e.g. using a reserved property name).

Unlike the happy-case path, errors are free to allocate. We won’t bend over backwards to ensure fast performance in reporting why entries are invalid!

Implementations

impl ValidationError

pub fn builder() -> ValidationErrorBuilder

Create a build that can be used to compose multiple validation failures into a single ValidationError. Note that if no validation failures are added to the builder, ValidationErrorBuilder::build() will return Ok, which is useful to track if a side-effect produced any errors.

pub fn extend(&mut self, other: ValidationError)

Extend this error with all of the validation failures recorded in other.

pub fn for_field(self, name: &str) -> ValidationError

Add the field name context for all of the validation failures reported in self.

pub fn invalid(reason: impl Into<String>) -> ValidationError

Record a generic validation failure with a reason string.

Trait Implementations

impl Clone for ValidationError

fn clone(&self) -> ValidationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValidationError

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

Formats the value using the given formatter.

impl Display for ValidationError

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

Formats the value using the given formatter.

impl Error for ValidationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl From<ValidationError> for IoStreamError

fn from(value: ValidationError) -> IoStreamError

Converts to this type from the input type.