Enum QuantityKind 

#[non_exhaustive]
pub enum QuantityKind {
    Length,
    Area,
    Volume,
    Count,
    Weight,
    Time,
    Number,
}

What a physical quantity measures.

The kind is the entity type, not a guess from the unit: a file may omit the unit entirely, and IfcQuantityArea still measures area.

Non-exhaustive: a later release may add a quantity subtype, as IFC4X3 added IfcQuantityNumber.

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.

Length

IfcQuantityLength.

Area

IfcQuantityArea.

Volume

IfcQuantityVolume.

Count

IfcQuantityCount.

Weight

IfcQuantityWeight, measured as mass.

Time

IfcQuantityTime.

Number

IfcQuantityNumber: a number that is not a physical measure, such as a ratio or a figure a take-off rule defines. Declared only by IFC4X3; the permissive readers resolve it only in a model whose declared release has it, and read it as Quantity::Unsupported elsewhere.

Implementations

impl QuantityKind

pub fn from_type_name(name: &str) -> Option<Self>

The kind named by an entity type, or None if it is not a simple quantity. Case-insensitive, because a type name reaching here may come from a caller rather than the upper-cased parser.

This maps names only; it does not check that a release declares the entity (IfcQuantityNumber is IFC4X3 only).

pub fn type_name(self) -> &'static str

The entity type name for this kind, in schema casing.

pub fn measure_type(self) -> &'static str

The measure type this kind’s value slot carries.

Fixed by the schema per subtype: an IfcQuantityArea holds an IfcAreaMeasure and nothing else.

pub fn required_unit(self) -> Option<&'static str>

The IfcUnitEnum this quantity’s unit must carry, per WR21.

IfcQuantityCount has no such rule – a count is dimensionless – and neither has IFC4X3 IfcQuantityNumber, so they constrain nothing.

Trait Implementations

impl Clone for QuantityKind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for QuantityKind

impl Debug for QuantityKind

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

Formats the value using the given formatter.

impl Eq for QuantityKind

impl PartialEq for QuantityKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QuantityKind