public virtual Differences VisitPrefixExpression(PrefixExpression pExpr1, PrefixExpression pExpr2){
Differences differences = new Differences(pExpr1, pExpr2);
if (pExpr1 == null || pExpr2 == null){
if (pExpr1 != pExpr2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
PrefixExpression changes = (PrefixExpression)pExpr2.Clone();
PrefixExpression deletions = (PrefixExpression)pExpr2.Clone();
PrefixExpression insertions = (PrefixExpression)pExpr2.Clone();
Differences diff = this.VisitExpression(pExpr1.Expression, pExpr2.Expression);
if (diff == null){Debug.Assert(false); return differences;}
changes.Expression = diff.Changes as Expression;
deletions.Expression = diff.Deletions as Expression;
insertions.Expression = diff.Insertions as Expression;
Debug.Assert(diff.Changes == changes.Expression && diff.Deletions == deletions.Expression && diff.Insertions == insertions.Expression);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
if (pExpr1.Operator == pExpr2.Operator) differences.NumberOfSimilarities++; else differences.NumberOfDifferences++;
if (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}
public override Expression VisitPrefixExpression(PrefixExpression pExpr)
{
if (pExpr == null) return null;
return base.VisitPrefixExpression((PrefixExpression)pExpr.Clone());
}