Enum UnitError 

pub enum UnitError {
    Malformed {
        expression: String,
        reason: String,
    },
    UnknownSymbol {
        expression: String,
        symbol: String,
    },
    OffsetCombined {
        expression: String,
        symbol: String,
    },
    DimensionMismatch {
        from: Dimension,
        to: Dimension,
    },
    DuplicateSymbol {
        symbol: String,
    },
    InvalidSymbol {
        symbol: String,
        reason: String,
    },
    NotFinite {
        parameter: &'static str,
    },
    NonPositiveFactor {
        got: f64,
    },
}

Why an expression, a definition or a conversion was refused.

Variants

Malformed

The expression is not well formed (an empty term, an unbalanced parenthesis, a misplaced operator, an exponent too large).

Fields

expression: String

The expression as given.

reason: String

What is wrong, in words.

UnknownSymbol

A symbol that is neither a known atom nor a prefix with one.

Fields

expression: String

The expression as given.

symbol: String

The symbol not recognised.

OffsetCombined

A unit with an offset given a prefix, an exponent, or a product.

Fields

expression: String

The expression as given.

symbol: String

The offset unit’s symbol.

DimensionMismatch

A conversion between different dimensions.

Fields

from: Dimension

The dimension of the unit converted from.

to: Dimension

The dimension of the unit converted to.

DuplicateSymbol

A definition whose symbol is already an atom (built in or defined).

Fields

symbol: String

The symbol.

InvalidSymbol

A definition whose symbol is not usable as an atom.

Fields

symbol: String

The symbol.

reason: String

What is wrong, in words.

NotFinite

A value, factor or offset that is NaN or infinite.

Fields

parameter: &'static str

What it is (value, factor, offset).

NonPositiveFactor

A definition’s factor that is not > 0.

Fields

got: f64

The factor given.

Trait Implementations

impl Clone for UnitError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnitError

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

Formats the value using the given formatter.

impl Display for UnitError

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

Formats the value using the given formatter.

impl Error for UnitError

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 UnitError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UnitError