public virtual Differences VisitReturn(Return return1, Return return2){
Differences differences = new Differences(return1, return2);
if (return1 == null || return2 == null){
if (return1 != return2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
Return changes = (Return)return2.Clone();
Return deletions = (Return)return2.Clone();
Return insertions = (Return)return2.Clone();
Differences diff = this.VisitExpression(return1.Expression, return2.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 (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}