Enum ExactUnitError 

#[non_exhaustive]
pub enum ExactUnitError {
    Structure(ExactPropertyError),
    MeasureNotInSchema {
        measure_type: Arc<str>,
        schema: SchemaVersion,
    },
    NotAMeasure {
        measure_type: Arc<str>,
    },
    UnmappedMeasureType {
        measure_type: Arc<str>,
    },
    UnexpectedUnit {
        unit: EntityId,
    },
    NoProject,
    MultipleProjects {
        first: EntityId,
        second: EntityId,
    },
    NoProjectUnit {
        unit_type: Arc<str>,
    },
    DuplicateProjectUnit {
        unit_type: Arc<str>,
        first: EntityId,
        second: EntityId,
    },
    UnsupportedUnit {
        unit: EntityId,
        type_name: Arc<str>,
    },
    MalformedUnit {
        entity: EntityId,
        attribute: &'static str,
    },
    UnknownPrefix {
        unit: EntityId,
        prefix: Arc<str>,
    },
    UnknownUnitName {
        unit: EntityId,
        name: Arc<str>,
    },
    UnitTypeMismatch {
        unit: EntityId,
        expected: Arc<str>,
        found: Arc<str>,
    },
    DimensionMismatch {
        unit: EntityId,
        expected: [i32; 7],
        found: [i32; 7],
    },
    UnsupportedOffset {
        unit: EntityId,
    },
    CyclicConversion {
        cycle: Vec<EntityId>,
    },
    ConversionChainTooDeep {
        unit: EntityId,
        max_depth: usize,
    },
}

Why a measure’s unit cannot be resolved exactly.

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.

Structure(ExactPropertyError)

The model, or a record the resolution traversed, failed a check that crate::exact_property applies the same way: diagnostics, header, missing references, slot arity, malformed aggregates, or a construct the declared release does not define.

MeasureNotInSchema

The declared release defines no type of this name.

Fields

measure_type: Arc<str>

The measure type as requested.

schema: SchemaVersion

The release the header declares.

NotAMeasure

The type is not a measure (IFCLABEL, IFCBOOLEAN, …), so no unit can apply to it.

Fields

measure_type: Arc<str>

The type as requested.

UnmappedMeasureType

A measure this resolver has no verified unit correspondence for, such as a monetary, descriptive, logarithmic or list-valued measure.

Fields

measure_type: Arc<str>

The measure type as requested.

UnexpectedUnit

A dimensionless measure was given an explicit unit.

Fields

unit: EntityId

The explicit unit.

NoProject

The model has no IfcProject to take a default unit from.

MultipleProjects

The model has several IfcProjects, so no one project default applies.

Fields

first: EntityId

The first project.

second: EntityId

The second project.

NoProjectUnit

No unit is stated and the project assigns none of the needed type.

Fields

unit_type: Arc<str>

The unit type the measure needs.

DuplicateProjectUnit

The project assigns two units of the needed type, which IfcCorrectUnitAssignment forbids; neither is “the” project unit.

Fields

unit_type: Arc<str>

The unit type assigned twice.

first: EntityId

The first unit of that type.

second: EntityId

The second unit of that type.

UnsupportedUnit

The entity is not a unit this resolver converts: not an IfcUnit at all, or a context-dependent or monetary unit with no SI conversion.

Fields

unit: EntityId

The rejected unit.

type_name: Arc<str>

Its IFC type name.

MalformedUnit

A unit attribute that must be an enumeration constant, a positive number or a typed value is not.

Fields

entity: EntityId

The unit entity or one of its parts.

attribute: &'static str

The offending attribute.

UnknownPrefix

An IfcSIUnit prefix that is not an IfcSIPrefix constant.

Fields

unit: EntityId

The unit.

prefix: Arc<str>

The prefix as written.

UnknownUnitName

An IfcSIUnit name that the release’s IfcDimensionsForSiUnit does not list, or a unit type its IfcCorrectDimensions does not list (including USERDEFINED).

Fields

unit: EntityId

The unit.

name: Arc<str>

The name or unit type as written.

UnitTypeMismatch

The unit declares another unit type than the measure needs.

Fields

unit: EntityId

The unit.

expected: Arc<str>

The unit type the measure needs.

found: Arc<str>

The unit type the unit declares.

DimensionMismatch

A unit’s dimensions contradict its declared unit type, its declared Dimensions, or the unit its conversion factor is expressed in.

Fields

unit: EntityId

The unit.

expected: [i32; 7]

The dimensions required.

found: [i32; 7]

The dimensions found.

UnsupportedOffset

An offset unit: IfcConversionBasedUnitWithOffset, or a unit with an offset used where only a scale can apply (inside a derived unit or as a conversion factor). IFC4’s prose on where the offset applies contradicts its own Fahrenheit example (factor 1.8, f = k * 1.8 - 459.67), so the offset is not applied until buildingSMART settles it (IFC4.x-development#1193; tracked in #110).

Fields

unit: EntityId

The unit carrying the offset.

CyclicConversion

Conversion-based units form a cycle.

Fields

cycle: Vec<EntityId>

The units on the cycle, closing on the first.

ConversionChainTooDeep

The chain of conversion and derived units is deeper than the budget.

Fields

unit: EntityId

The unit at which the budget ran out.

max_depth: usize

The depth budget.

Trait Implementations

impl Clone for ExactUnitError

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 ExactUnitError

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

Formats the value using the given formatter.

impl Display for ExactUnitError

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

Formats the value using the given formatter.

impl Eq for ExactUnitError

impl Error for ExactUnitError

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 From<ExactPropertyError> for ExactUnitError

fn from(error: ExactPropertyError) -> Self

Converts to this type from the input type.

impl PartialEq for ExactUnitError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ExactUnitError