Struct ValueError

pub struct ValueError<T> { /* private fields */ }

Helper type that is core::error::Error and wraps a value and an error message.

This can be used to return an object as part of an Err and is used for fallible conversions.

Implementations

impl<T> ValueError<T>

pub fn new(value: T, msg: impl Display) -> Self

Creates a new error with the given value and error message.

pub fn new_static(value: T, msg: &'static str) -> Self

Creates a new error with a static error message.

pub fn convert<U>(self) -> ValueError<U>

where U: From<T>,

Converts the value to the given alternative that is From<T>.

pub fn map<U>(self, f: impl FnOnce(T) -> U) -> ValueError<U>

Maps the error’s value with the given closure.

pub fn into_value(self) -> T

Consumes the type and returns the underlying value.

pub const fn value(&self) -> &T

Returns a reference to the value.

Trait Implementations

impl<T: Debug> Debug for ValueError<T>

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

Formats the value using the given formatter.

impl<T> Display for ValueError<T>

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

Formats the value using the given formatter.

impl<T> Error for ValueError<T>

where Self: Debug + Display,

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.