src/validators/DTD/CMUnaryOp.cpp

/*
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/**
 * $Log$
 * Revision 1.1  1999/11/09 01:03:08  twl
 * Initial revision
 *
 * Revision 1.2  1999/11/08 20:45:37  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <util/XML4CDefs.hpp>
#include <util/RuntimeException.hpp>
#include <validators/DTD/CMStateSet.hpp>
#include <validators/DTD/CMUnaryOp.hpp>


// ---------------------------------------------------------------------------
//  CMUnaryOp: Constructors and Destructor
// ---------------------------------------------------------------------------
CMUnaryOp::CMUnaryOp(   const   ContentSpecNode::NodeTypes  type
                        ,       CMNode* const               nodeToAdopt) :
    CMNode(type)
    , fChild(nodeToAdopt)
{
    // Insure that its one of the types we require
    if ((type != ContentSpecNode::ZeroOrOne)
    &&  (type != ContentSpecNode::ZeroOrMore)
    &&  (type != ContentSpecNode::OneOrMore))
    {
        ThrowXML(RuntimeException, XML4CExcepts::CM_UnaryOpHadBinType);
    }
}

CMUnaryOp::~CMUnaryOp()
{
    delete fChild;
}


// ---------------------------------------------------------------------------
//  CMUnaryOp: Getter methods
// ---------------------------------------------------------------------------
const CMNode* CMUnaryOp::getChild() const
{
    return fChild;
}

CMNode* CMUnaryOp::getChild()
{
    return fChild;
}


// ---------------------------------------------------------------------------
//  CMUnaryOp: Implementation of the public CMNode virtual interface
// ---------------------------------------------------------------------------
bool CMUnaryOp::isNullable() const
{
    // Repetition operations are always nullable
    return true;
}


// ---------------------------------------------------------------------------
//  CMUnaryOp: Implementation of the protected CMNode virtual interface
// ---------------------------------------------------------------------------
void CMUnaryOp::calcFirstPos(CMStateSet& toSet) const
{
    // Its just based on our child node's first pos
    toSet = fChild->getFirstPos();
}

void CMUnaryOp::calcLastPos(CMStateSet& toSet) const
{
    // Its just based on our child node's last pos
    toSet = fChild->getLastPos();
}