Struct CastValueError 

pub struct CastValueError {
    pub requested: &'static str,
    pub got: ValueType,
}

An error type for an attempt of accessing a value in one internal representation as another.

This error is raised whenever it is not possible to retrieve the requested value, either because the inner representation is not compatible with the requested value type, or a conversion would be required. In other words, if a reference to the inner value cannot be obtained with the requested target type (for example, retrieving a date from a string), an error of this type is returned.

If such a conversion is acceptable, please use conversion methods instead: to_date instead of date, to_str instead of string, and so on. The error type would then be ConvertValueError.

Fields

requested: &'static str

The value format requested

got: ValueType

The value’s actual representation

Trait Implementations

impl Clone for CastValueError

fn clone(&self) -> CastValueError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CastValueError

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

Formats the value using the given formatter.

impl Display for CastValueError

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

Formats the value using the given formatter.

impl Error for CastValueError

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 PartialEq for CastValueError

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