Enum ErrorsNonNegativeRealScalar 

pub enum ErrorsNonNegativeRealScalar<RealType: RealScalar> {
    NegativeValue {
        value: RealType,
        backtrace: Backtrace,
    },
}

Error type for NonNegativeRealScalar<T> validation failures.

This enum provides error information when attempting to construct a NonNegativeRealScalar<T> with a negative value.

Error Variants

• ErrorsNonNegativeRealScalar::NegativeValue: The input was negative (< 0).

Note that zero is valid for NonNegativeRealScalar, unlike PositiveRealScalar.

Examples

use num_valid::scalars::{NonNegativeRealScalar, ErrorsNonNegativeRealScalar};
use try_create::TryNew;

// Zero is valid for NonNegativeRealScalar
let zero = NonNegativeRealScalar::try_new(0.0_f64);
assert!(zero.is_ok());

// Negative values are rejected
match NonNegativeRealScalar::try_new(-1.0_f64) {
    Err(ErrorsNonNegativeRealScalar::NegativeValue { value, .. }) => {
        assert_eq!(value, -1.0);
    }
    _ => unreachable!(),
}

Variants

NegativeValue

The input value was negative (must be ≥ 0).

Fields

value: RealType

The negative value that was rejected.

backtrace: Backtrace

Stack trace for debugging.

Trait Implementations

impl<RealType: Debug + RealScalar> Debug for ErrorsNonNegativeRealScalar<RealType>

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

Formats the value using the given formatter.

impl<RealType> Display for ErrorsNonNegativeRealScalar<RealType>

where RealType: Display + RealScalar,

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

Formats the value using the given formatter.

impl<RealType: RealScalar> Error for ErrorsNonNegativeRealScalar<RealType>

where Self: Debug + Display,

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

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

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

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