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//static const char* sccsid = "@(#)Expr_RelationIterator.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_RelationIterator.cxx
// Created: Thu Jun 13 16:57:35 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr_RelationIterator.ixx>
#include <Standard_NoMoreObject.hxx>
#include <Standard_NoSuchObject.hxx>
#include <Expr_SystemRelation.hxx>
Expr_RelationIterator::Expr_RelationIterator (const Handle(Expr_GeneralRelation)& rel):myRelation(1,rel->NbOfSingleRelations())
{
if (rel->IsKind(STANDARD_TYPE(Expr_SingleRelation))) {
myRelation(1) = Handle(Expr_SingleRelation)::DownCast(rel);
}
else {
Standard_Integer nbcur = 1;
Handle(Expr_GeneralRelation) currel;
for (Standard_Integer i =1; i<= rel->NbOfSubRelations(); i++) {
currel = rel->SubRelation(i);
if (currel->IsKind(STANDARD_TYPE(Expr_SingleRelation))) {
myRelation(nbcur) = Handle(Expr_SingleRelation)::DownCast(currel);
nbcur++;
}
else {
Expr_RelationIterator subit(currel);
while (subit.More()) {
myRelation(nbcur) = subit.Value();
subit.Next();
nbcur++;
}
}
}
}
current = 1;
}
Standard_Boolean Expr_RelationIterator::More () const
{
return (current <= myRelation.Length());
}
void Expr_RelationIterator::Next ()
{
if (!More()) {
Standard_NoMoreObject::Raise();
}
current++;
}
Handle(Expr_SingleRelation) Expr_RelationIterator::Value () const
{
if (!More()) {
Standard_NoSuchObject::Raise();
}
return myRelation(current);
}
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