Enum OperandKind 

pub enum OperandKind {
    BooleanResult,
    CsgPrimitive,
    HalfSpace,
    SolidModel,
    TessellatedFaceSet,
}

What an IfcBooleanOperand reference actually points at.

The SELECT permits five families. A walker needs to know whether to recurse (a nested result) or to hand the entity to a solid builder, and classifying once here keeps that decision out of every call site.

Variants

BooleanResult

Another IfcBooleanResult (or IfcBooleanClippingResult): recurse.

CsgPrimitive

An IfcCsgPrimitive3D subtype.

HalfSpace

An IfcHalfSpaceSolid subtype: infinite, only valid here.

SolidModel

An IfcSolidModel subtype: swept, brep or CSG solid.

TessellatedFaceSet

An IfcTessellatedFaceSet subtype. The schema requires it to be closed when used as a boolean operand.

Implementations

impl OperandKind

pub fn classify(type_name: &str) -> Option<Self>

Classify by IFC type name.

Name-based because the model is untyped by design; the alternative is a generated subtype table per schema version, which is what this codebase exists to avoid.

pub fn is_nested_boolean(self) -> bool

Must a walker descend into this operand?

Trait Implementations

impl Clone for OperandKind

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 OperandKind

impl Debug for OperandKind

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

Formats the value using the given formatter.

impl Eq for OperandKind

impl PartialEq for OperandKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OperandKind