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test/tools/javac/lambda/LambdaConv01.java@93012e2a5d1d (annotated)

test/tools/javac/lambda/LambdaConv01.java

Sat, 07 Nov 2020 10:30:02 +0800

author

aoqi

date

Sat, 07 Nov 2020 10:30:02 +0800

changeset 3938

93012e2a5d1d

parent 2525

2eb010b6cb22

permissions

-rw-r--r--

Added tag mips-jdk8u275-b01 for changeset eb6ee6a5f2fe

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, 2013, 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	* basic test for lambda conversion
aoqi@0	29	* @author Brian Goetz
aoqi@0	30	* @author Maurizio Cimadamore
aoqi@0	31	* @run main LambdaConv01
aoqi@0	32	*/
aoqi@0	33
aoqi@0	34	public class LambdaConv01 {
aoqi@0	35
aoqi@0	36	static int assertionCount = 0;
aoqi@0	37
aoqi@0	38	static void assertTrue(boolean cond) {
aoqi@0	39	assertionCount++;
aoqi@0	40	if (!cond)
aoqi@0	41	throw new AssertionError();
aoqi@0	42	}
aoqi@0	43
aoqi@0	44	interface IntToInt {
aoqi@0	45	public int foo(int x);
aoqi@0	46	}
aoqi@0	47
aoqi@0	48	interface IntToVoid {
aoqi@0	49	public void foo(int x);
aoqi@0	50	}
aoqi@0	51
aoqi@0	52	interface VoidToInt {
aoqi@0	53	public int foo();
aoqi@0	54	}
aoqi@0	55
aoqi@0	56	interface TU<T, U> {
aoqi@0	57	public T foo(U u);
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	public static <T, U> T exec(TU<T, U> lambda, U x) {
aoqi@0	61	return lambda.foo(x);
aoqi@0	62	}
aoqi@0	63
aoqi@0	64	static {
aoqi@0	65	//Assignment conversion:
aoqi@0	66	VoidToInt f1 = ()-> 3;
aoqi@0	67	assertTrue(3 == f1.foo());
aoqi@0	68	//Covariant returns:
aoqi@0	69	TU<Number, Integer> f2 = (Integer x) -> x;
aoqi@0	70	assertTrue(3 == f2.foo(3).intValue());
aoqi@0	71	//Method resolution with boxing:
aoqi@0	72	int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
aoqi@0	73	assertTrue(3 == res);
aoqi@0	74	//Runtime exception transparency:
aoqi@0	75	try {
aoqi@0	76	LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
aoqi@0	77	}
aoqi@0	78	catch (RuntimeException e) {
aoqi@0	79	assertTrue(true);
aoqi@0	80	}
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	{
aoqi@0	84	//Assignment conversion:
aoqi@0	85	VoidToInt f1 = ()-> 3;
aoqi@0	86	assertTrue(3 == f1.foo());
aoqi@0	87	//Covariant returns:
aoqi@0	88	TU<Number, Integer> f2 = (Integer x) -> x;
aoqi@0	89	assertTrue(3 == f2.foo(3).intValue());
aoqi@0	90	//Method resolution with boxing:
aoqi@0	91	int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
aoqi@0	92	assertTrue(3 == res);
aoqi@0	93	//Runtime exception transparency:
aoqi@0	94	try {
aoqi@0	95	LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
aoqi@0	96	}
aoqi@0	97	catch (RuntimeException e) {
aoqi@0	98	assertTrue(true);
aoqi@0	99	}
aoqi@0	100	}
aoqi@0	101
aoqi@0	102	public static void test1() {
aoqi@0	103	//Assignment conversion:
aoqi@0	104	VoidToInt f1 = ()-> 3;
aoqi@0	105	assertTrue(3 == f1.foo());
aoqi@0	106	//Covariant returns:
aoqi@0	107	TU<Number, Integer> f2 = (Integer x) -> x;
aoqi@0	108	assertTrue(3 == f2.foo(3).intValue());
aoqi@0	109	//Method resolution with boxing:
aoqi@0	110	int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
aoqi@0	111	assertTrue(3 == res);
aoqi@0	112	//Runtime exception transparency:
aoqi@0	113	try {
aoqi@0	114	LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
aoqi@0	115	}
aoqi@0	116	catch (RuntimeException e) {
aoqi@0	117	assertTrue(true);
aoqi@0	118	}
aoqi@0	119	}
aoqi@0	120
aoqi@0	121	public void test2() {
aoqi@0	122	//Assignment conversion:
aoqi@0	123	VoidToInt f1 = ()-> 3;
aoqi@0	124	assertTrue(3 == f1.foo());
aoqi@0	125	//Covariant returns:
aoqi@0	126	TU<Number, Integer> f2 = (Integer x) -> x;
aoqi@0	127	assertTrue(3 == f2.foo(3).intValue());
aoqi@0	128	//Method resolution with boxing:
aoqi@0	129	int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
aoqi@0	130	assertTrue(3 == res);
aoqi@0	131	//Runtime exception transparency:
aoqi@0	132	try {
aoqi@0	133	LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
aoqi@0	134	}
aoqi@0	135	catch (RuntimeException e) {
aoqi@0	136	assertTrue(true);
aoqi@0	137	}
aoqi@0	138	}
aoqi@0	139
aoqi@0	140	public static void main(String[] args) {
aoqi@0	141	test1();
aoqi@0	142	new LambdaConv01().test2();
aoqi@0	143	assertTrue(assertionCount == 16);
aoqi@0	144	}
aoqi@0	145	}