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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/controlflow/SLWhileNode.java @ 13761:7c418666c6c9

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Refactoring and cleanup of Simple Language (more to come soon)
author Christian Wimmer <christian.wimmer@oracle.com>
date Fri, 24 Jan 2014 18:16:24 -0800
parents graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/WhileNode.java@d4c6dd07be76
children b16ec83edc73
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1 /*
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2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl.nodes.controlflow;
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24
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25 import com.oracle.truffle.api.frame.*;
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26 import com.oracle.truffle.api.utilities.*;
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27 import com.oracle.truffle.sl.nodes.*;
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29 public class SLWhileNode extends SLStatementNode {
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31 @Child private SLExpressionNode condition;
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32 @Child private SLStatementNode body;
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33
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34 private final BranchProfile continueTaken = new BranchProfile();
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35 private final BranchProfile breakTaken = new BranchProfile();
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36
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37 public SLWhileNode(SLExpressionNode condition, SLStatementNode body) {
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38 this.condition = adoptChild(condition);
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39 this.body = adoptChild(body);
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40 }
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41
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42 @Override
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43 public void executeVoid(VirtualFrame frame) {
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44 try {
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45 while (condition.executeCondition(frame)) {
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46 try {
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47 body.executeVoid(frame);
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48 } catch (SLContinueException ex) {
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49 continueTaken.enter();
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50 /* Fall through to next loop iteration. */
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51 }
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52 }
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53 } catch (SLBreakException ex) {
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54 breakTaken.enter();
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55 /* Done executing this loop, exit method to execute statement following the loop. */
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56 }
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57 }
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58 }