public virtual Differences VisitComprehension(Comprehension comprehension1, Comprehension comprehension2){
Differences differences = new Differences(comprehension1, comprehension2);
if (comprehension1 == null || comprehension2 == null){
if (comprehension1 != comprehension2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
Comprehension changes = (Comprehension)comprehension2.Clone();
Comprehension deletions = (Comprehension)comprehension2.Clone();
Comprehension insertions = (Comprehension)comprehension2.Clone();
ExpressionList exprChanges, exprDeletions, exprInsertions;
Differences diff = this.VisitExpressionList(comprehension1.BindingsAndFilters, comprehension2.BindingsAndFilters, out exprChanges, out exprDeletions, out exprInsertions);
if (diff == null){Debug.Assert(false); return differences;}
changes.BindingsAndFilters = exprChanges;
deletions.BindingsAndFilters = exprDeletions;
insertions.BindingsAndFilters = exprInsertions;
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
diff = this.VisitExpressionList(comprehension1.Elements, comprehension2.Elements, out exprChanges, out exprDeletions, out exprInsertions);
if (diff == null){Debug.Assert(false); return differences;}
changes.Elements = exprChanges;
deletions.Elements = exprDeletions;
insertions.Elements = exprInsertions;
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
if (comprehension1.Mode == comprehension2.Mode) 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 VisitComprehension(Comprehension Comprehension)
{
if (Comprehension == null) return null;
return base.VisitComprehension((Comprehension)Comprehension.Clone());
}