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comparison graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 9782:ba02d19dd3cc

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Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
author Christian Humer <christian.humer@gmail.com>
date Tue, 21 May 2013 19:43:53 +0200
parents 9640bb930327
children 29e9a5d18c70
comparison
equal deleted inserted replaced
9781:c15fd053efb6 9782:ba02d19dd3cc
147 assert this.getParent() != null; 147 assert this.getParent() != null;
148 if (sourceSection != null) { 148 if (sourceSection != null) {
149 // Pass on the source section to the new node. 149 // Pass on the source section to the new node.
150 newNode.assignSourceSection(sourceSection); 150 newNode.assignSourceSection(sourceSection);
151 } 151 }
152 onReplace(newNode, reason);
152 return (T) this.getParent().replaceChild(this, newNode); 153 return (T) this.getParent().replaceChild(this, newNode);
153 } 154 }
154 155
155 private <T extends Node> T replaceChild(T oldChild, T newChild) { 156 private <T extends Node> T replaceChild(T oldChild, T newChild) {
156 NodeUtil.replaceChild(this, oldChild, newChild); 157 NodeUtil.replaceChild(this, oldChild, newChild);
165 * @param newNode the new node that is the replacement 166 * @param newNode the new node that is the replacement
166 * @return the new node 167 * @return the new node
167 */ 168 */
168 public final <T extends Node> T replace(T newNode) { 169 public final <T extends Node> T replace(T newNode) {
169 return replace(newNode, ""); 170 return replace(newNode, "");
171 }
172
173 /**
174 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the
175 * node is rewritten. This method is invoked before the actual replace has happened.
176 *
177 * @param newNode the replacement node
178 * @param reason the reason the replace supplied
179 */
180 protected void onReplace(Node newNode, String reason) {
170 } 181 }
171 182
172 /** 183 /**
173 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all 184 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all
174 * child nodes. 185 * child nodes.