Enum UcumError 

#[non_exhaustive]
pub enum UcumError {
    Parse {
        pos: usize,
        msg: String,
    },
    UnknownAtom {
        code: String,
    },
    NotComparable {
        from: String,
        to: String,
    },
    UnsupportedSpecial {
        unit: String,
    },
}

Errors produced by parsing, validation, analysis and conversion.

Every public function in this crate is total: it returns one of these errors rather than panicking or looping forever on malformed input.

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.

Parse

The input is not syntactically a valid UCUM expression.

pos is the byte offset into the input at which the problem was detected.

Fields

pos: usize

Byte offset into the original input.

msg: String

Human-readable description of the problem.

UnknownAtom

A unit token was syntactically well-formed but is not a known UCUM atom (optionally with a prefix).

Fields

code: String

The offending token.

NotComparable

Two units were compared or converted but have different dimensions.

Fields

from: String

The source unit expression.

to: String

The target unit expression.

UnsupportedSpecial

Conversion was requested for a special (non-multiplicative) unit whose conversion is not supported, e.g. a logarithmic, arbitrary, or otherwise non-affine unit, or an affine unit used inside a compound term.

Fields

unit: String

The unit expression that could not be converted.

Trait Implementations

impl Clone for UcumError

fn clone(&self) -> UcumError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UcumError

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

Formats the value using the given formatter.

impl Display for UcumError

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

Formats the value using the given formatter.

impl Eq for UcumError

impl Error for UcumError

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 UcumError

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