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Add a toString for UnaryPrefixNode
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@ -51,4 +51,9 @@ public class UnaryPrefixNode extends TreeNode {
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public TreeNode getApplyTo() {
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return applyTo;
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}
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@Override
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public String toString() {
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return "(" + (applyTo == null ? "null" : applyTo.toString()) + ")" + operation;
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}
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}
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