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60 lines
1.4 KiB
C++
Executable File
60 lines
1.4 KiB
C++
Executable File
// Copyright: Matra-Datavision 1991
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// File: Expr_RelationIterator.cxx
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// Created: Thu Jun 13 16:57:35 1991
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// Author: Arnaud BOUZY
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// <adn>
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#include <Expr_RelationIterator.ixx>
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#include <Standard_NoMoreObject.hxx>
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#include <Standard_NoSuchObject.hxx>
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#include <Expr_SystemRelation.hxx>
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Expr_RelationIterator::Expr_RelationIterator (const Handle(Expr_GeneralRelation)& rel):myRelation(1,rel->NbOfSingleRelations())
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{
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if (rel->IsKind(STANDARD_TYPE(Expr_SingleRelation))) {
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myRelation(1) = Handle(Expr_SingleRelation)::DownCast(rel);
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}
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else {
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Standard_Integer nbcur = 1;
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Handle(Expr_GeneralRelation) currel;
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for (Standard_Integer i =1; i<= rel->NbOfSubRelations(); i++) {
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currel = rel->SubRelation(i);
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if (currel->IsKind(STANDARD_TYPE(Expr_SingleRelation))) {
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myRelation(nbcur) = Handle(Expr_SingleRelation)::DownCast(currel);
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nbcur++;
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}
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else {
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Expr_RelationIterator subit(currel);
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while (subit.More()) {
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myRelation(nbcur) = subit.Value();
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subit.Next();
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nbcur++;
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}
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}
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}
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}
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current = 1;
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}
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Standard_Boolean Expr_RelationIterator::More () const
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{
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return (current <= myRelation.Length());
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}
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void Expr_RelationIterator::Next ()
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{
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if (!More()) {
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Standard_NoMoreObject::Raise();
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}
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current++;
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}
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Handle(Expr_SingleRelation) Expr_RelationIterator::Value () const
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{
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if (!More()) {
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Standard_NoSuchObject::Raise();
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}
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return myRelation(current);
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}
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