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test/tools/javac/lambda/lambdaExpression/SamConversion.java@7873d37f5b37 (annotated)

test/tools/javac/lambda/lambdaExpression/SamConversion.java

Mon, 21 Jan 2013 20:13:56 +0000

author

mcimadamore

date

Mon, 21 Jan 2013 20:13:56 +0000

changeset 1510

7873d37f5b37

parent 0

959103a6100f

permissions

-rw-r--r--

8005244: Implement overload resolution as per latest spec EDR
Summary: Add support for stuck expressions and provisional applicability
Reviewed-by: jjg

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/**
aoqi@0	25	* @test
aoqi@0	26	* @bug 8003280
aoqi@0	27	* @summary Add lambda tests
aoqi@0	28	* Test SAM conversion of lambda expressions in context of assignment, method call, return statement and cast.
aoqi@0	29	* @compile SamConversion.java
aoqi@0	30	* @run main SamConversion
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	public class SamConversion {
aoqi@0	34
aoqi@0	35	static interface Foo {
aoqi@0	36	Integer m(int i);
aoqi@0	37	}
aoqi@0	38
aoqi@0	39	static interface Bar {
aoqi@0	40	int m(Integer i) throws Exception;
aoqi@0	41	}
aoqi@0	42
aoqi@0	43	private static String assertionStr = "";
aoqi@0	44
aoqi@0	45	private static void assertTrue(boolean b) {
aoqi@0	46	if(!b)
aoqi@0	47	throw new AssertionError();
aoqi@0	48	}
aoqi@0	49
aoqi@0	50	private static void test1(Foo foo) {
aoqi@0	51	assertTrue(foo.m(1) == 2);
aoqi@0	52	}
aoqi@0	53
aoqi@0	54	private static void test2(Bar bar) {
aoqi@0	55	try {
aoqi@0	56	assertTrue(bar.m(1) == 2);
aoqi@0	57	} catch (Exception e){
aoqi@0	58	assertTrue(false);
aoqi@0	59	}
aoqi@0	60	}
aoqi@0	61
aoqi@0	62	private static Bar test3(int i) {
aoqi@0	63	switch (i) {
aoqi@0	64	case 0:
aoqi@0	65	return n -> n + 1;
aoqi@0	66	case 1:
aoqi@0	67	return (Integer n) -> 2 * n;
aoqi@0	68	case 2:
aoqi@0	69	return (Integer n) -> {return new Integer(n-1);};
aoqi@0	70	case 3:
aoqi@0	71	return n -> {throw new Exception();};
aoqi@0	72	default:
aoqi@0	73	return null;
aoqi@0	74	}
aoqi@0	75	}
aoqi@0	76
aoqi@0	77	public static void main(String[] args) {
aoqi@0	78
aoqi@0	79	//assign:
aoqi@0	80	Foo foo = (int n) -> n + 1; //explicit type and boxing
aoqi@0	81	assertTrue(foo.m(1) == 2);
aoqi@0	82
aoqi@0	83	foo = n -> n + 1; //type inferrred and boxing
aoqi@0	84	assertTrue(foo.m(1) == 2);
aoqi@0	85
aoqi@0	86	Bar bar = (Integer n) -> n + 1; //explicit type and unboxing
aoqi@0	87	try {
aoqi@0	88	assertTrue(bar.m(1) == 2);
aoqi@0	89	} catch (Exception e) {
aoqi@0	90	assertTrue(false);
aoqi@0	91	}
aoqi@0	92
aoqi@0	93	bar = (Integer n) -> new Integer(n+1); //explicit type and unboxing twice
aoqi@0	94	try {
aoqi@0	95	assertTrue(bar.m(1) == 2);
aoqi@0	96	} catch (Exception e) {
aoqi@0	97	assertTrue(false);
aoqi@0	98	}
aoqi@0	99
aoqi@0	100	bar = n -> n.intValue() + 1; //type inferred
aoqi@0	101	try {
aoqi@0	102	assertTrue(bar.m(1) == 2);
aoqi@0	103	} catch (Exception e) {
aoqi@0	104	assertTrue(false);
aoqi@0	105	}
aoqi@0	106
aoqi@0	107	bar = n -> n + 1; // type inferred and unboxing
aoqi@0	108	try {
aoqi@0	109	assertTrue(bar.m(1) == 2);
aoqi@0	110	} catch (Exception e) {
aoqi@0	111	assertTrue(false);
aoqi@0	112	}
aoqi@0	113
aoqi@0	114	//cast:
aoqi@0	115	assertTrue(((Foo)n -> {return n+1;}).m(1) == 2); //statement (instead of expression) in lambda body
aoqi@0	116	try {
aoqi@0	117	assertTrue(((Bar)n -> {return n+1;}).m(1) == 2); //statement in lambda body
aoqi@0	118	} catch (Exception e) {
aoqi@0	119	assertTrue(false);
aoqi@0	120	}
aoqi@0	121
aoqi@0	122	//method parameter:
aoqi@0	123	test1((int n) -> new Integer(n+1)); //explicit type
aoqi@0	124	test2((Integer n) -> n.intValue() + 1); //explicit type
aoqi@0	125
aoqi@0	126	//return statement:
aoqi@0	127	bar = test3(0);
aoqi@0	128	try {
aoqi@0	129	assertTrue(bar.m(1) == 2);
aoqi@0	130	} catch (Exception e) {
aoqi@0	131	assertTrue(false);
aoqi@0	132	}
aoqi@0	133	bar = test3(1);
aoqi@0	134	try {
aoqi@0	135	assertTrue(bar.m(3) == 6);
aoqi@0	136	} catch (Exception e) {
aoqi@0	137	assertTrue(false);
aoqi@0	138	}
aoqi@0	139	bar = test3(2);
aoqi@0	140	try {
aoqi@0	141	assertTrue(bar.m(10) == 9);
aoqi@0	142	} catch (Exception e) {
aoqi@0	143	assertTrue(false);
aoqi@0	144	}
aoqi@0	145	bar = test3(3);
aoqi@0	146	try {
aoqi@0	147	bar.m(10);
aoqi@0	148	assertTrue(false);
aoqi@0	149	} catch (Exception e) {}
aoqi@0	150	}
aoqi@0	151	}