Struct Slots 

pub struct Slots<'m> { /* private fields */ }

Attribute reader bound to one entity.

Carries the id and type name so every error is self-locating without the call site repeating them.

Implementations

impl<'m> Slots<'m>

pub fn new(id: EntityId, entity: &'m Entity) -> Self

Wrap an entity for attribute access.

pub fn id(&self) -> EntityId

The entity id.

pub fn entity(&self) -> &'m Entity

The underlying entity.

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

The IFC type name.

pub fn opt(&self, index: usize) -> Option<&'m Value>

Raw attribute, None when absent or $.

Treats a missing slot and an explicit $ alike: both mean “not provided”, and real files disagree about which to write for trailing optionals.

pub fn req(&self, index: usize, name: &'static str) -> GeometryResult<&'m Value>

Required attribute.

pub fn req_f64(&self, index: usize, name: &'static str) -> GeometryResult<f64>

Required real number, accepting an integer literal.

STEP writes 0 where a real is declared often enough that rejecting it would fail on conforming-in-practice files.

pub fn opt_f64(&self, index: usize) -> Option<f64>

Optional real number.

pub fn req_i64(&self, index: usize, name: &'static str) -> GeometryResult<i64>

Required integer.

pub fn req_ref( &self, index: usize, name: &'static str, ) -> GeometryResult<EntityId>

Required entity reference.

pub fn opt_ref(&self, index: usize) -> Option<EntityId>

Optional entity reference.

pub fn req_f64_list( &self, index: usize, name: &'static str, ) -> GeometryResult<Vec<f64>>

Required list of reals, e.g. Coordinates on IfcCartesianPoint.

pub fn req_ref_list( &self, index: usize, name: &'static str, ) -> GeometryResult<Vec<EntityId>>

Required list of entity references.

pub fn opt_ref_list(&self, index: usize) -> Vec<EntityId>

Optional list of entity references; absent becomes empty.

pub fn opt_text(&self, index: usize) -> Option<String>

Enumeration token without its dots, e.g. .CARTESIAN. -> CARTESIAN. A text attribute, absent when unset or not a string.

Labels like RepresentationIdentifier are optional in the schema and authors do omit them, so a missing value is data rather than an error.

pub fn opt_enum(&self, index: usize) -> Option<&'m str>

The enumeration token at index, when the slot holds one.

Returns None for an omitted slot and for a value that is present but not an enumeration, so a caller cannot mistake a type error for an authored absence.

pub fn opt_bool(&self, index: usize) -> Option<bool>

Boolean or logical value.

Returns None for .U. (logical unknown), which is a real third state in IFC and must not silently become false.

pub fn req_bool(&self, index: usize, name: &'static str) -> GeometryResult<bool>

Required boolean.

pub fn resolve( &self, model: &'m Model, id: EntityId, ) -> GeometryResult<&'m Entity>

Resolve a referenced entity, failing if it dangles.

pub fn unsupported(&self, detail: &'static str) -> GeometryError

Report a valid-but-unhandled entity.

pub fn degenerate(&self, detail: impl Into<String>) -> GeometryError

Report geometry that cannot exist.

Trait Implementations

impl<'m> Clone for Slots<'m>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'m> Copy for Slots<'m>

impl<'m> Debug for Slots<'m>

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

Formats the value using the given formatter.