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1 /* |
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2 * Copyright (c) 2011, 2017, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.source.tree; |
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27 |
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28 import java.util.List; |
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29 |
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30 /** |
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31 * A tree node for a lambda expression. |
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32 * |
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33 * For example: |
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34 * <pre>{@code |
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35 * ()->{} |
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36 * (List<String> ls)->ls.size() |
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37 * (x,y)-> { return x + y; } |
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38 * }</pre> |
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39 */ |
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40 public interface LambdaExpressionTree extends ExpressionTree { |
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41 |
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42 /** |
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43 * Lambda expressions come in two forms: |
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44 * <ul> |
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45 * <li> expression lambdas, whose body is an expression, and |
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46 * <li> statement lambdas, whose body is a block |
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47 * </ul> |
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48 */ |
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49 public enum BodyKind { |
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50 /** enum constant for expression lambdas */ |
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51 EXPRESSION, |
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52 /** enum constant for statement lambdas */ |
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53 STATEMENT |
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54 } |
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55 |
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56 /** |
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57 * Returns the parameters of this lambda expression. |
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58 * @return the parameters |
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59 */ |
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60 List<? extends VariableTree> getParameters(); |
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61 |
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62 /** |
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63 * Returns the body of the lambda expression. |
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64 * @return the body |
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65 */ |
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66 Tree getBody(); |
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67 |
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68 /** |
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69 * Returns the kind of the body of the lambda expression. |
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70 * @return the kind of the body |
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71 */ |
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72 BodyKind getBodyKind(); |
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73 } |