pub struct ArgumentError(_);
Expand description

Error that indicates a random number could not be generated with the given bounds.

This error is returned by rand(). See its documentation for more details.

This error corresponds to the Ruby ArgumentError Exception class.

Examples

let err = ArgumentError::new();
assert_eq!(err.message(), "ArgumentError");

Implementations§

source§

impl ArgumentError

source

pub const fn new() -> Self

Construct a new, default argument error.

Examples
const ERR: ArgumentError = ArgumentError::new();
assert_eq!(ERR.message(), "ArgumentError");
source

pub const fn domain_error() -> Self

Construct a new domain error.

Examples
const ERR: ArgumentError = ArgumentError::domain_error();
assert_eq!(ERR.message(), "Numerical argument out of domain");
source

pub const fn with_rand_max(max: Max) -> Self

Available on crate feature random-rand only.

Construct a new argument error from an invalid Max constraint.

Examples
const ERR: ArgumentError = ArgumentError::with_rand_max(Max::Integer(-1));
assert_eq!(ERR.message(), "invalid argument");
source

pub const fn message(self) -> &'static str

Retrieve the exception message associated with this new seed error.

Implementation notes

Argument errors constructed with ArgumentError::with_rand_max return an incomplete error message. Prefer to use the Display impl to retrieve error messages from ArgumentError.

Examples
let err = ArgumentError::new();
assert_eq!(err.message(), "ArgumentError");
let err = ArgumentError::domain_error();
assert_eq!(err.message(), "Numerical argument out of domain");
source

pub const fn is_domain_error(self) -> bool

Return whether this argument error is a domain error.

Domain errors are typically reported as Errno::EDOM in MRI.

Examples
let err = ArgumentError::domain_error();
assert!(err.is_domain_error());
let err = ArgumentError::new();
assert!(!err.is_domain_error());

Trait Implementations§

source§

impl Clone for ArgumentError

source§

fn clone(&self) -> ArgumentError

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl Debug for ArgumentError

source§

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

Formats the value using the given formatter. Read more
source§

impl Display for ArgumentError

source§

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

Formats the value using the given formatter. Read more
source§

impl Error for ArgumentError

1.30.0 · source§

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

The lower-level source of this error, if any. Read more
1.0.0 · source§

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
1.0.0 · source§

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

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
source§

fn provide<'a>(&'a self, demand: &mut Demand<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type based access to context intended for error reports. Read more
source§

impl From<ArgumentError> for Error

source§

fn from(err: ArgumentError) -> Self

Converts to this type from the input type.
source§

impl PartialEq<ArgumentError> for ArgumentError

source§

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

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl PartialOrd<ArgumentError> for ArgumentError

source§

fn partial_cmp(&self, other: &ArgumentError) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl Copy for ArgumentError

source§

impl StructuralPartialEq for ArgumentError

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Any for Twhere
T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for Twhere
U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<E> Provider for Ewhere
E: Error + ?Sized,

source§

fn provide<'a>(&'a self, demand: &mut Demand<'a>)

🔬This is a nightly-only experimental API. (provide_any)
Data providers should implement this method to provide all values they are able to provide by using demand. Read more
source§

impl<T> ToOwned for Twhere
T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T> ToString for Twhere
T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.