Struct QuantityExtras 

pub struct QuantityExtras<'a> {
    pub description: Option<&'a str>,
    pub unit: Option<EntityId>,
    pub formula: Option<&'a str>,
}

The optional attributes of an IfcPhysicalSimpleQuantity.

Separated from create_quantity so the common call stays short, while Description, Unit and Formula remain reachable. They are attributes of the entity, not decoration: the reader in this crate resolves all three.

Fields

description: Option<&'a str>

IfcPhysicalQuantity.Description.

unit: Option<EntityId>

IfcPhysicalSimpleQuantity.Unit, an IfcNamedUnit reference.

Left unset the quantity is read in the project’s default unit for its measure, which is usually what a take-off wants.

formula: Option<&'a str>

Formula, how the quantity was derived. IFC4 and IFC4X3 only: an IFC2X3 quantity has no Formula, and one given for it is refused.

Trait Implementations

impl<'a> Clone for QuantityExtras<'a>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for QuantityExtras<'a>

impl<'a> Debug for QuantityExtras<'a>

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

Formats the value using the given formatter.

impl<'a> Default for QuantityExtras<'a>

fn default() -> Self

Returns the “default value” for a type.