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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.runtime.lookup;
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11
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12 import java.util.*;
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13
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14 import com.oracle.truffle.api.*;
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15 import com.oracle.truffle.api.utilities.*;
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16 import com.oracle.truffle.ruby.runtime.methods.*;
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17
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18 /**
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19 * A terminal in the lookup graph.
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20 */
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21 public class LookupTerminal implements LookupNode {
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22
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23 public static final LookupTerminal INSTANCE = new LookupTerminal();
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24
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25 public boolean setClassVariableIfAlreadySet(String variableName, Object value) {
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26 return false;
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27 }
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28
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29 @Override
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30 public Object lookupConstant(String constantName) {
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31 return null;
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32 }
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33
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34 @Override
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35 public Object lookupClassVariable(String constantName) {
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36 return null;
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37 }
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38
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39 @Override
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40 public RubyMethod lookupMethod(String methodName) {
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41 return null;
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42 }
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43
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44 @Override
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45 public Assumption getUnmodifiedAssumption() {
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46 return AlwaysValidAssumption.INSTANCE;
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47 }
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48
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49 public Set<String> getClassVariables() {
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50 return Collections.emptySet();
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51 }
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52
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53 public void getMethods(Map<String, RubyMethod> methods) {
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54 }
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55
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56 }
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