public virtual Differences VisitAttributeNode(AttributeNode attribute1, AttributeNode attribute2){
Differences differences = new Differences(attribute1, attribute2);
if (attribute1 == null || attribute2 == null){
if (attribute1 != attribute2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
AttributeNode changes = (AttributeNode)attribute2.Clone();
AttributeNode deletions = (AttributeNode)attribute2.Clone();
AttributeNode insertions = (AttributeNode)attribute2.Clone();
if (attribute1.AllowMultiple == attribute2.AllowMultiple) differences.NumberOfSimilarities++; else differences.NumberOfDifferences++;
Differences diff = this.VisitExpression(attribute1.Constructor, attribute2.Constructor);
if (diff == null){Debug.Assert(false); return differences;}
changes.Constructor = diff.Changes as Expression;
deletions.Constructor = diff.Deletions as Expression;
insertions.Constructor = diff.Insertions as Expression;
Debug.Assert(diff.Changes == changes.Constructor && diff.Deletions == deletions.Constructor && diff.Insertions == insertions.Constructor);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
ExpressionList exprChanges, exprDeletions, exprInsertions;
diff = this.VisitExpressionList(attribute1.Expressions, attribute2.Expressions, out exprChanges, out exprDeletions, out exprInsertions);
if (diff == null){Debug.Assert(false); return differences;}
changes.Expressions = exprChanges;
deletions.Expressions = exprDeletions;
insertions.Expressions = exprInsertions;
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
if (attribute1.Target == attribute2.Target) 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 AttributeNode VisitAttributeNode(AttributeNode attribute)
{
if (attribute == null) return null;
return base.VisitAttributeNode((AttributeNode)attribute.Clone());
}