Enum DateDurationParseError 

#[non_exhaustive]
pub enum DateDurationParseError {
    InvalidStructure,
    TimeNotSupported,
    MissingValue,
    DuplicateUnit,
    NumberOverflow,
    PlusNotAllowed,
}

Errors that can occur when parsing an ISO 8601 date-only duration string.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

InvalidStructure

The input does not follow the expected ISO 8601 date only duration structure.

This error occurs when the duration string is incomplete, or contains unexpected characters.

Examples

use icu::calendar::error::DateDurationParseError;
use icu::calendar::types::DateDuration;

assert_eq!(
    DateDuration::try_from_str("P"),
    Err(DateDurationParseError::InvalidStructure)
);
assert_eq!(
    DateDuration::try_from_str("P1"),
    Err(DateDurationParseError::InvalidStructure)
);

TimeNotSupported

The duration contains a time component, which is not supported.

Only date based units (Y, M, W, D) are supported. Any duration containing a T time separator is rejected.

Examples

use icu::calendar::error::DateDurationParseError;
use icu::calendar::types::DateDuration;

assert_eq!(
    DateDuration::try_from_str("PT5M"),
    Err(DateDurationParseError::TimeNotSupported)
);
assert_eq!(
    DateDuration::try_from_str("P1DT"),
    Err(DateDurationParseError::TimeNotSupported)
);

MissingValue

A duration unit appeared without a number before it.

For example, the string contains Y, M, W, or D without a numeric value directly in front of it.

Examples

use icu::calendar::error::DateDurationParseError;
use icu::calendar::types::DateDuration;

assert_eq!(
    DateDuration::try_from_str("PY"),
    Err(DateDurationParseError::MissingValue)
);
assert_eq!(
    DateDuration::try_from_str("PX1D"),
    Err(DateDurationParseError::MissingValue)
);

DuplicateUnit

A duration unit was specified more than once.

Each unit (Y, M, W, D) may appear at most once only.

Examples

use icu::calendar::error::DateDurationParseError;
use icu::calendar::types::DateDuration;

assert_eq!(
    DateDuration::try_from_str("P1Y2Y"),
    Err(DateDurationParseError::DuplicateUnit)
);
assert_eq!(
    DateDuration::try_from_str("P1D1D"),
    Err(DateDurationParseError::DuplicateUnit)
);

NumberOverflow

A numeric value exceeded or was more than the supported range.

Examples

use icu::calendar::error::DateDurationParseError;
use icu::calendar::types::DateDuration;

assert_eq!(
    DateDuration::try_from_str("P4294967296Y"),
    Err(DateDurationParseError::NumberOverflow)
);

PlusNotAllowed

A duration starts with a + sign, which is not allowed.

Only negative durations using a leading - are supported.

Examples

use icu::calendar::error::DateDurationParseError;
use icu::calendar::types::DateDuration;

assert_eq!(
    DateDuration::try_from_str("+P1D"),
    Err(DateDurationParseError::PlusNotAllowed)
);

Trait Implementations

impl Clone for DateDurationParseError

fn clone(&self) -> DateDurationParseError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DateDurationParseError

impl Debug for DateDurationParseError

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

Formats the value using the given formatter.

impl Eq for DateDurationParseError

impl PartialEq for DateDurationParseError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DateDurationParseError