/*******************************************************************************
* Copyright (c) 2011, 2016 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Stephan Herrmann - Contribution for
* Bug 400874 - [1.8][compiler] Inference infrastructure should evolve to meet JLS8 18.x (Part G of JSR335 spec)
* Bug 423504 - [1.8] Implement "18.5.3 Functional Interface Parameterization Inference"
* Bug 424742 - [1.8] NPE in LambdaExpression.isCompatibleWith
*******************************************************************************/
package org.eclipse.jdt.core.tests.compiler.regression;
import java.io.File;
import java.util.Map;
import org.eclipse.jdt.core.ToolFactory;
import org.eclipse.jdt.core.tests.util.Util;
import org.eclipse.jdt.core.util.IAttributeNamesConstants;
import org.eclipse.jdt.core.util.IClassFileAttribute;
import org.eclipse.jdt.core.util.IClassFileReader;
import org.eclipse.jdt.core.util.IMethodInfo;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.core.util.BootstrapMethodsAttribute;
import junit.framework.Test;
@SuppressWarnings({ "unchecked", "rawtypes" })
public class LambdaExpressionsTest extends AbstractRegressionTest {
static {
// TESTS_NAMES = new String[] { "testReferenceExpressionInference1"};
// TESTS_NUMBERS = new int[] { 50 };
// TESTS_RANGE = new int[] { 11, -1 };
}
public LambdaExpressionsTest(String name) {
super(name);
}
public static Test suite() {
return buildMinimalComplianceTestSuite(testClass(), F_1_8);
}
public void test001() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" int add(int x, int y);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (x, y) -> {\n" +
" return x + y;\n" +
" };\n" +
" System.out.println(i.add(1234, 5678));\n" +
" }\n" +
"}\n",
},
"6912"
);
}
public void test002() {
this.runConformTest(
new String[] {
"X.java",
"interface Greetings {\n" +
" void greet(String head, String tail);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Greetings g = (x, y) -> {\n" +
" System.out.println(x + y);\n" +
" };\n" +
" g.greet(\"Hello, \", \"World!\");\n" +
" }\n" +
"}\n",
},
"Hello, World!"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406178, [1.8][compiler] Some functional interfaces are wrongly rejected
public void test003() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x, int y);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" BinaryOperator<String> binOp = (x,y) -> { return x+y; };\n" +
" System.out.println(\"SUCCESS\");\n" +
" // System.out.println(binOp.apply(\"SUCC\", \"ESS\")); // when lambdas run\n" +
" }\n" +
"}\n",
"BiFunction.java",
"@FunctionalInterface\n" +
"public interface BiFunction<T, U, R> {\n" +
" R apply(T t, U u);\n" +
"}",
"BinaryOperator.java",
"@FunctionalInterface\n" +
"public interface BinaryOperator<T> extends BiFunction<T,T,T> {\n" +
"}"
},
"SUCCESS");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406178, [1.8][compiler] Some functional interfaces are wrongly rejected
public void test004() {
this.runNegativeTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x, int y);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" BinaryOperator binOp = (x,y) -> { return x+y; };\n" +
" System.out.println(\"SUCCESS\");\n" +
" // System.out.println(binOp.apply(\"SUCC\", \"ESS\")); // when lambdas run\n" +
" }\n" +
"}\n",
"BiFunction.java",
"@FunctionalInterface\n" +
"public interface BiFunction<T, U, R> {\n" +
" R apply(T t, U u);\n" +
"}",
"BinaryOperator.java",
"@FunctionalInterface\n" +
"public interface BinaryOperator<T> extends BiFunction<T,T,T> {\n" +
"}"
},
"----------\n" +
"1. WARNING in X.java (at line 6)\n" +
" BinaryOperator binOp = (x,y) -> { return x+y; };\n" +
" ^^^^^^^^^^^^^^\n" +
"BinaryOperator is a raw type. References to generic type BinaryOperator<T> should be parameterized\n" +
"----------\n" +
"2. ERROR in X.java (at line 6)\n" +
" BinaryOperator binOp = (x,y) -> { return x+y; };\n" +
" ^^^\n" +
"The operator + is undefined for the argument type(s) java.lang.Object, java.lang.Object\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test005() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String id(String s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> s;\n" +
" System.out.println(i.id(\"Hello\"));\n" +
" }\n" +
"}\n"
},
"Hello");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test006() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String id(String s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> s + s;\n" +
" System.out.println(i.id(\"Hello\"));\n" +
" }\n" +
"}\n"
},
"HelloHello");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test007() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void print(String s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> System.out.println(s);\n" +
" i.print(\"Hello\");\n" +
" }\n" +
"}\n"
},
"Hello");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test008() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String print(String s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> new String(s).toUpperCase();\n" +
" System.out.println(i.print(\"Hello\"));\n" +
" }\n" +
"}\n"
},
"HELLO");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test009() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String print(String s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> new String(s);\n" +
" System.out.println(i.print(\"Hello\"));\n" +
" }\n" +
"}\n"
},
"Hello");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test010() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" int unbox(Integer i);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> s;\n" +
" System.out.println(i.unbox(new Integer(1234)));\n" +
" }\n" +
"}\n"
},
"1234");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test011() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" Integer box(int i);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = (s) -> s;\n" +
" System.out.println(i.box(1234));\n" +
" }\n" +
"}\n"
},
"1234");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test012() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X subType();\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = () -> new Y();\n" +
" System.out.println(i.subType());\n" +
" }\n" +
"}\n" +
"class Y extends X {\n" +
" public String toString() {\n" +
" return \"Some Y\";\n" +
" }\n" +
"}"
},
"Some Y");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406175, [1.8][compiler][codegen] Generate code for lambdas with expression body.
public void test013() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(String s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" int in = 12345678;\n" +
" I i = (s) -> {\n" +
" I j = (s2) -> {\n" +
" System.out.println(s + s2 + in); \n" +
" };\n" +
" j.foo(\"Number=\");\n" +
" };\n" +
" i.foo(\"The \");\n" +
" }\n" +
"}\n"
},
"The Number=12345678");
}
public void test014() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void doit();\n" +
"}\n" +
"public class X {\n" +
" public static void nonmain(String[] args) {\n" +
" int var = 2;\n" +
" I x2 = () -> {\n" +
" System.out.println(\"Argc = \" + args.length);\n" +
" for (int i = 0; i < args.length; i++) {\n" +
" System.out.println(\"Argv[\" + i + \"] = \" + args[i]);\n" +
" }\n" +
" };\n" +
" x2.doit();\n" +
" var=2;\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" nonmain(new String[] {\"Hello! \", \"World!\" });\n" +
" }\n" +
"}" ,
},
"Argc = 2\n" +
"Argv[0] = Hello! \n" +
"Argv[1] = World!");
}
public void test015() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void doit();\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" try {\n" +
" new java.io.File((String) null).getCanonicalPath();\n" +
" } catch (NullPointerException | java.io.IOException ioe) {\n" +
" I x2 = () -> {\n" +
" System.out.println(ioe.getMessage()); // OK: args is not re-assignment since declaration/first assignment\n" +
" };\n" +
" x2.doit();\n" +
" };\n"+
" }\n" +
"}\n"
},
"null");
}
public void test016() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void doit();\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" java.util.List<String> list = new java.util.ArrayList<>();\n" +
" list.add(\"SomeString\");\n" +
" for (String s : list) {\n" +
" I x2 = () -> {\n" +
" System.out.println(s); // OK: args is not re-assignment since declaration/first assignment\n" +
" };\n" +
" x2.doit();\n" +
" };\n" +
" }\n" +
"\n" +
"}\n" ,
},
"SomeString");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406181, [1.8][compiler][codegen] IncompatibleClassChangeError when running code with lambda method
public void test017() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x, int y);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" BinaryOperator<String> binOp = (x,y) -> { return x+y; }; \n" +
" System.out.println(binOp.apply(\"SUCC\", \"ESS\")); // when lambdas run\n" +
" }\n" +
"}\n" +
"@FunctionalInterface\n" +
"interface BiFunction<T, U, R> { \n" +
" R apply(T t, U u);\n" +
"}\n" +
"@FunctionalInterface \n" +
"interface BinaryOperator<T> extends BiFunction<T,T,T> { \n" +
"}\n",
},
"SUCCESS");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=405071, [1.8][compiler][codegen] Generate code for array constructor references
public void test018() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X [][][] copy (short x);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = X[][][]::new;\n" +
" I j = X[][][]::new;\n" +
" X[][][] x = i.copy((short) 631);\n" +
" System.out.println(x.length);\n" +
" x = j.copy((short) 136);\n" +
" System.out.println(x.length);\n" +
" }\n" +
"}\n",
},
"631\n" +
"136");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=405071, [1.8][compiler][codegen] Generate code for array constructor references
public void test019() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X [][][] copy (int x);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = X[][][]::new;\n" +
" I j = X[][][]::new;\n" +
" X[][][] x = i.copy(631);\n" +
" System.out.println(x.length);\n" +
" x = j.copy(136);\n" +
" System.out.println(x.length);\n" +
" }\n" +
"}\n",
},
"631\n" +
"136");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=405071, [1.8][compiler][codegen] Generate code for array constructor references
public void test020() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X [][][] copy (Integer x);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = X[][][]::new;\n" +
" I j = X[][][]::new;\n" +
" X[][][] x = i.copy(631);\n" +
" System.out.println(x.length);\n" +
" x = j.copy(136);\n" +
" System.out.println(x.length);\n" +
" }\n" +
"}\n",
},
"631\n" +
"136");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=405071, [1.8][compiler][codegen] Generate code for array constructor references
public void test021() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X [][][] copy (Integer x);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I i = X[][][]::new;\n" +
" I j = X[][][]::new;\n" +
" X[][][] x = i.copy(new Integer(631));\n" +
" System.out.println(x.length);\n" +
" x = j.copy(new Integer((short)136));\n" +
" System.out.println(x.length);\n" +
" }\n" +
"}\n",
},
"631\n" +
"136");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406388, [1.8][compiler][codegen] Runtime evaluation of method reference produces "BootstrapMethodError: call site initialization exception"
public void test022() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" Object copy(int [] ia);\n" +
"}\n" +
"interface J {\n" +
" int [] copy(int [] ia);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = int[]::<String>clone;\n" +
" int [] x = new int [] { 10, 20, 30 };\n" +
" int [] y = (int []) i.copy(x);\n" +
" if (x == y || x.length != y.length || x[0] != y[0] || x[1] != y[1] || x[2] != y[2]) {\n" +
" System.out.println(\"Broken\");\n" +
" } else {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
" J j = int []::clone;\n" +
" y = null;\n" +
" y = j.copy(x);\n" +
" if (x == y || x.length != y.length || x[0] != y[0] || x[1] != y[1] || x[2] != y[2]) {\n" +
" System.out.println(\"Broken\");\n" +
" } else {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
" }\n" +
"}\n" ,
},
"OK\n" +
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406388, [1.8][compiler][codegen] Runtime evaluation of method reference produces "BootstrapMethodError: call site initialization exception"
public void test023() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" Object copy(int [] ia);\n" +
"}\n" +
"\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = int[]::<String>clone;\n" +
" int [] ia = (int []) i.copy(new int[10]);\n" +
" System.out.println(ia.length);\n" +
" }\n" +
"}\n",
},
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406388, [1.8][compiler][codegen] Runtime evaluation of method reference produces "BootstrapMethodError: call site initialization exception"
public void test024() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" YBase copy(Y ia);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = Y::<String>copy;\n" +
" YBase yb = i.copy(new Y());\n" +
" System.out.println(yb.getClass());\n" +
" }\n" +
"}\n" +
"class YBase {\n" +
" public YBase copy() {\n" +
" return this;\n" +
" }\n" +
"}\n" +
"class Y extends YBase {\n" +
"}\n",
},
"class Y");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406388, [1.8][compiler][codegen] Runtime evaluation of method reference produces "BootstrapMethodError: call site initialization exception"
public void test025() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" int foo(int [] ia);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = int[]::<String>hashCode;\n" +
" i.foo(new int[10]);\n" +
" }\n" +
"}\n",
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406589, [1.8][compiler][codegen] super call misdispatched
public void test026() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" Integer foo(int x, int y);\n" +
"}\n" +
"class Y {\n" +
" int foo(int x, int y) {\n" +
" System.out.println(\"Y.foo(\" + x + \",\" + y + \")\");\n" +
" return foo(x, y);\n" +
" }\n" +
"}\n" +
"public class X extends Y {\n" +
" int foo(int x, int y) {\n" +
" System.out.println(\"X.foo(\" + x + \",\" + y + \")\");\n" +
" return x + y;\n" +
" }\n" +
" void goo() {\n" +
" I i = super::foo;\n" +
" System.out.println(i.foo(1234, 4321));\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().goo();\n" +
" }\n" +
"}\n",
},
"Y.foo(1234,4321)\n" +
"X.foo(1234,4321)\n" +
"5555");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406589, [1.8][compiler][codegen] super call misdispatched
public void test027() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" int foo(int x, int y);\n" +
"}\n" +
"interface J {\n" +
" default int foo(int x, int y) {\n" +
" System.out.println(\"I.foo(\" + x + \",\" + y + \")\");\n" +
" return x + y;\n" +
" }\n" +
"}\n" +
"public class X implements J {\n" +
" public static void main(String[] args) {\n" +
" I i = new X().f();\n" +
" System.out.println(i.foo(1234, 4321));\n" +
" i = new X().g();\n" +
" try {\n" +
" System.out.println(i.foo(1234, 4321));\n" +
" } catch (Throwable e) {\n" +
" System.out.println(e.getMessage());\n" +
" }\n" +
" }\n" +
" I f() {\n" +
" return J.super::foo;\n" +
" }\n" +
" I g() {\n" +
" return new X()::foo;\n" +
" }\n" +
" public int foo(int x, int y) {\n" +
" throw new RuntimeException(\"Exception\");\n" +
" }\n" +
"}\n",
},
"I.foo(1234,4321)\n" +
"5555\n" +
"Exception");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406584, Bug 406584 - [1.8][compiler][codegen] ClassFormatError: Invalid method signature
public void test028() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" Object copy();\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" int [] x = new int[] { 0xdeadbeef, 0xfeedface };\n" +
" I i = x::<String>clone;\n" +
" System.out.println(Integer.toHexString(((int []) i.copy())[0]));\n" +
" System.out.println(Integer.toHexString(((int []) i.copy())[1]));\n" +
" }\n" +
"}\n",
},
"deadbeef\n" +
"feedface");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406588, [1.8][compiler][codegen] java.lang.invoke.LambdaConversionException: Incorrect number of parameters for static method newinvokespecial
public void test029() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X.Y.Z makexyz(int val);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String args []) {\n" +
" new X().new Y().new Z().new P().goo();\n" +
" }\n" +
" class Y {\n" +
" class Z {\n" +
" Z(int val) {\n" +
" System.out.println(Integer.toHexString(val));\n" +
" } \n" +
" Z() {\n" +
" }\n" +
" class P {\n" +
" void goo() {\n" +
" I i = Z::new;\n" +
" i.makexyz(0xdeadbeef);\n" +
" }\n" +
" I i = Z::new;\n" +
" { i.makexyz(0xfeedface); }\n" +
" }\n" +
" }\n" +
" I i = Z::new;\n" +
" { i.makexyz(0xbeeffeed); }\n" +
" }\n" +
"}\n",
},
"beeffeed\n" +
"feedface\n" +
"deadbeef");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406588, [1.8][compiler][codegen] java.lang.invoke.LambdaConversionException: Incorrect number of parameters for static method newinvokespecial
public void test030() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X.Y makeY();\n" +
"}\n" +
"public class X {\n" +
" public class Y {\n" +
" public String toString() {\n" +
" return \"class Y\";\n" +
" }\n" +
" }\n" +
" void foo() {\n" +
" I i = Y::new;\n" +
" System.out.println(i.makeY());\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().foo();\n" +
" }\n" +
"}\n",
},
"class Y");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406588, [1.8][compiler][codegen] java.lang.invoke.LambdaConversionException: Incorrect number of parameters for static method newinvokespecial
public void test031() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X.Y makeY(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y {\n" +
" String state; \n" +
" Y(int x) {\n" +
" state = Integer.toHexString(x);\n" +
" }\n" +
" public String toString() {\n" +
" return state;\n" +
" }\n" +
" }\n" +
" class Z extends Y {\n" +
" Z(int x) {\n" +
" super(x);\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().f();\n" +
" }\n" +
" void f() {\n" +
" I i = Y::new;\n" +
" System.out.println(i.makeY(0xdeadbeef));\n" +
" }\n" +
"}\n",
},
"deadbeef");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406588, [1.8][compiler][codegen] java.lang.invoke.LambdaConversionException: Incorrect number of parameters for static method newinvokespecial
public void test032() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X.Y makeY(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y {\n" +
" String state; \n" +
" Y(int x) {\n" +
" state = Integer.toHexString(x);\n" +
" }\n" +
" public String toString() {\n" +
" return state;\n" +
" }\n" +
" }\n" +
" class Z extends Y {\n" +
" Z(int x) {\n" +
" super(x);\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().f();\n" +
" }\n" +
" void f() {\n" +
" I i = Z::new;\n" +
" System.out.println(i.makeY(0xdeadbeef));\n" +
" }\n" +
"}\n",
},
"deadbeef");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406588, [1.8][compiler][codegen] java.lang.invoke.LambdaConversionException: Incorrect number of parameters for static method newinvokespecial
public void test033() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X.Y.Z makeY(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y {\n" +
" Y() {\n" +
" }\n" +
" class Z {\n" +
" String state;\n" +
" Z(int x) {\n" +
" state = Integer.toHexString(x);\n" +
" }\n" +
" public String toString() {\n" +
" return state;\n" +
" }\n" +
" }\n" +
" }\n" +
" class YS extends Y {\n" +
" YS() {\n" +
" }\n" +
" void f() {\n" +
" I i = Z::new;\n" +
" System.out.println(i.makeY(0xbeefface));\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().new YS().f();\n" +
" }\n" +
"}\n",
},
"beefface");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406319, [1.8][compiler][codegen] Generate code for enclosing instance capture in lambda methods.
public void test034() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" int foo();\n" +
"}\n" +
"public class X {\n" +
" int f = 1234;\n" +
" void foo() {\n" +
" int x = 4321;\n" +
" I i = () -> x + f;\n" +
" System.out.println(i.foo());\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().foo();\n" +
" }\n" +
"}\n",
},
"5555");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406319, [1.8][compiler][codegen] Generate code for enclosing instance capture in lambda methods.
public void test035() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int p, int q);\n" +
"}\n" +
"public class X {\n" +
" int f;\n" +
" void foo(int outerp) {\n" +
" int locouter;\n" +
" I i = (int p, int q) -> {\n" +
" class Local {\n" +
" void foo() {\n" +
" }\n" +
" };\n" +
" new Local();\n" +
" };\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n",
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406319, [1.8][compiler][codegen] Generate code for enclosing instance capture in lambda methods.
public void test036() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String foo(String x, String y);\n" +
"}\n" +
"public class X {\n" +
" String xf = \"Lambda \";\n" +
" String x() {\n" +
" String xl = \"code \";\n" +
" class Y {\n" +
" String yf = \"generation \";\n" +
" String y () {\n" +
" String yl = \"with \";\n" +
" class Z {\n" +
" String zf = \"instance \";\n" +
" String z () {\n" +
" String zl = \"and \";\n" +
" class P {\n" +
" String pf = \"local \";\n" +
" String p () {\n" +
" String pl = \"capture \";\n" +
" I i = (x1, y1) -> {\n" +
" return (((I) ((x2, y2) -> {\n" +
" return ( ((I) ((x3, y3) -> {\n" +
" return xf + xl + yf + yl + zf + zl + pf + pl + x3 + y3;\n" +
" })).foo(\"works \", \"fine \") + x2 + y2);\n" +
" })).foo(\"in \", \"the \") + x1 + y1);\n" +
" };\n" +
" return i.foo(\"eclipse \", \"compiler \");\n" +
" }\n" +
" }\n" +
" return new P().p();\n" +
" }\n" +
" }\n" +
" return new Z().z();\n" +
" }\n" +
" }\n" +
" return new Y().y();\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" System.out.println(new X().x());\n" +
" }\n" +
"}\n",
},
"Lambda code generation with instance and local capture works fine in the eclipse compiler");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406319, [1.8][compiler][codegen] Generate code for enclosing instance capture in lambda methods.
public void test037() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String foo(String x, String y);\n" +
"}\n" +
"public class X {\n" +
" String xf = \"Lambda \";\n" +
" String x() {\n" +
" String xl = \"code \";\n" +
" class Y {\n" +
" String yf = \"generation \";\n" +
" String y () {\n" +
" String yl = \"with \";\n" +
" class Z {\n" +
" String zf = \"instance \";\n" +
" String z () {\n" +
" String zl = \"and \";\n" +
" class P {\n" +
" String pf = \"local \";\n" +
" String p () {\n" +
" String pl = \"capture \";\n" +
" I i = (x1, y1) -> {\n" +
" return (((I) ((x2, y2) -> {\n" +
" return ( ((I) ((x3, y3) -> {\n" +
" String exclaim = \"!\";\n" +
" return xf + xl + yf + yl + zf + zl + pf + pl + x3 + y3 + x2 + y2 + x1 + y1 + exclaim;\n" +
" })).foo(\"works \", \"fine \"));\n" +
" })).foo(\"in \", \"the \"));\n" +
" };\n" +
" return i.foo(\"eclipse \", \"compiler \");\n" +
" }\n" +
" }\n" +
" return new P().p();\n" +
" }\n" +
" }\n" +
" return new Z().z();\n" +
" }\n" +
" }\n" +
" return new Y().y();\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" System.out.println(new X().x());\n" +
" }\n" +
"}\n",
},
"Lambda code generation with instance and local capture works fine in the eclipse compiler !");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406641, [1.8][compiler][codegen] Code generation for intersection cast.
public void test038() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
"}\n" +
"interface J {\n" +
"}\n" +
"public class X implements I, J {\n" +
" public static void main( String [] args) { \n" +
" f(new X());\n" +
" }\n" +
" static void f(Object o) {\n" +
" X x = (X & I & J) o;\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n",
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406641, [1.8][compiler][codegen] Code generation for intersection cast.
public void test039() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
"}\n" +
"interface J {\n" +
"}\n" +
"public class X implements J {\n" +
" public static void main( String [] args) { \n" +
" f(new X());\n" +
" }\n" +
" static void f(Object o) {\n" +
" try {\n" +
" X x = (X & I & J) o;\n" +
" } catch (ClassCastException e) {\n" +
" System.out.println(e.getMessage());\n" +
" }\n" +
" }\n" +
"}\n",
},
"X cannot be cast to I");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test041() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" class Z {\n" +
" void f() {\n" +
" I i = X::new;\n" +
" i.makeX(123456);\n" +
" }\n" +
" }\n" +
" private X(int x) {\n" +
" System.out.println(x);\n" +
" }\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().new Z().f();\n" +
" }\n" +
"}\n",
},
"123456");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test042() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y extends X {\n" +
" class Z {\n" +
" void f() {\n" +
" I i = X::new;\n" +
" i.makeX(123456);\n" +
" i = Y::new;\n" +
" i.makeX(987654);\n" +
" }\n" +
" }\n" +
" private Y(int y) {\n" +
" System.out.println(\"Y(\" + y + \")\");\n" +
" }\n" +
" private Y() {\n" +
" \n" +
" }\n" +
" }\n" +
" private X(int x) {\n" +
" System.out.println(\"X(\" + x + \")\");\n" +
" }\n" +
"\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().new Y().new Z().f();\n" +
" }\n" +
"\n" +
"}\n",
},
"X(123456)\n" +
"Y(987654)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test043() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y extends X {\n" +
" class Z extends X {\n" +
" void f() {\n" +
" I i = X::new;\n" +
" i.makeX(123456);\n" +
" i = Y::new;\n" +
" i.makeX(987654);\n" +
" i = Z::new;\n" +
" i.makeX(456789);\n" +
" }\n" +
" private Z(int z) {\n" +
" System.out.println(\"Z(\" + z + \")\");\n" +
" }\n" +
" Z() {\n" +
" }\n" +
" }\n" +
" private Y(int y) {\n" +
" System.out.println(\"Y(\" + y + \")\");\n" +
" }\n" +
" private Y() {\n" +
" \n" +
" }\n" +
" }\n" +
" private X(int x) {\n" +
" System.out.println(\"X(\" + x + \")\");\n" +
" }\n" +
"\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().new Y().new Z().f();\n" +
" }\n" +
"\n" +
"}\n",
},
"X(123456)\n" +
"Y(987654)\n" +
"Z(456789)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test044() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" void foo() {\n" +
" int local;\n" +
" class Y extends X {\n" +
" class Z extends X {\n" +
" void f() {\n" +
" I i = X::new;\n" +
" i.makeX(123456);\n" +
" i = Y::new;\n" +
" i.makeX(987654);\n" +
" i = Z::new;\n" +
" i.makeX(456789);\n" +
" }\n" +
" private Z(int z) {\n" +
" System.out.println(\"Z(\" + z + \")\");\n" +
" }\n" +
" Z() {}\n" +
" }\n" +
" private Y(int y) {\n" +
" System.out.println(\"Y(\" + y + \")\");\n" +
" }\n" +
" private Y() {\n" +
" }\n" +
" }\n" +
" new Y().new Z().f();\n" +
" }\n" +
" private X(int x) {\n" +
" System.out.println(\"X(\" + x + \")\");\n" +
" }\n" +
"\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().foo();\n" +
" }\n" +
"}\n",
},
"X(123456)\n" +
"Y(987654)\n" +
"Z(456789)");
}
public void test045() {
this.runNegativeTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" I i = (x) -> {\n" +
" class Y extends X {\n" +
" private Y (int y) {\n" +
" System.out.println(y);\n" +
" }\n" +
" Y() {\n" +
" }\n" +
" void f() {\n" +
" I i = X::new;\n" +
" i.makeX(123456);\n" +
" i = X.Y::new;\n" +
" i.makeX(987654);\n" +
" }\n" +
" }\n" +
" return null; \n" +
" };\n" +
" private X(int x) {\n" +
" System.out.println(x);\n" +
" }\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().new Y().f();\n" +
" }\n" +
"}\n",
},
"----------\n" +
"1. WARNING in X.java (at line 6)\n" +
" class Y extends X {\n" +
" ^\n" +
"The type Y is never used locally\n" +
"----------\n" +
"2. WARNING in X.java (at line 7)\n" +
" private Y (int y) {\n" +
" ^^^^^^^^^\n" +
"The constructor Y(int) is never used locally\n" +
"----------\n" +
"3. WARNING in X.java (at line 10)\n" +
" Y() {\n" +
" ^^^\n" +
"The constructor Y() is never used locally\n" +
"----------\n" +
"4. WARNING in X.java (at line 13)\n" +
" I i = X::new;\n" +
" ^\n" +
"The local variable i is hiding a field from type X\n" +
"----------\n" +
"5. ERROR in X.java (at line 15)\n" +
" i = X.Y::new;\n" +
" ^\n" +
"Y cannot be resolved or is not a field\n" +
"----------\n" +
"6. ERROR in X.java (at line 27)\n" +
" new X().new Y().f();\n" +
" ^\n" +
"X.Y cannot be resolved to a type\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406760, [1.8][compiler][codegen] "VerifyError: Bad type on operand stack" with qualified super method references
public void test046() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String doit();\n" +
"}\n" +
"public class X extends B {\n" +
" class Y {\n" +
" class Z {\n" +
" void f() {\n" +
" \n" +
" I i = X.super::toString; // Verify error\n" +
" System.out.println(i.doit());\n" +
" i = X.this::toString; // This call gets dispatched OK.\n" +
" System.out.println(i.doit());\n" +
" }\n" +
" }\n" +
" }\n" +
" \n" +
" public static void main(String[] args) {\n" +
" new X().new Y().new Z().f(); \n" +
" }\n" +
" \n" +
" public String toString() {\n" +
" return \"X's toString\";\n" +
" }\n" +
"}\n" +
"class B {\n" +
" public String toString() {\n" +
" return \"B's toString\";\n" +
" }\n" +
"}\n",
},
"B\'s toString\n" +
"X\'s toString");
}
public void test047() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x, int y);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" long lng = 1234;\n" +
" double d = 1234.5678;\n" +
" I i = (x, y) -> {\n" +
" System.out.println(\"long = \" + lng);\n" +
" System.out.println(\"args length = \" + args.length);\n" +
" System.out.println(\"double = \" + d);\n" +
" System.out.println(\"x = \" + x);\n" +
" System.out.println(\"y = \" + y);\n" +
" };\n" +
" i.foo(9876, 4321);\n" +
" }\n" +
"}\n",
},
"long = 1234\n" +
"args length = 0\n" +
"double = 1234.5678\n" +
"x = 9876\n" +
"y = 4321");
}
public void test048() {
this.runConformTest(
new String[] {
"X.java",
"interface I<T, J> {\n" +
" void foo(T x, J y);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" long lng = 1234;\n" +
" double d = 1234.5678;\n" +
" I<Object, Object> i = (x, y) -> {\n" +
" System.out.println(\"long = \" + lng);\n" +
" System.out.println(\"args length = \" + args.length);\n" +
" System.out.println(\"double = \" + d);\n" +
" System.out.println(\"x = \" + x);\n" +
" System.out.println(\"y = \" + y);\n" +
" };\n" +
" i.foo(9876, 4321);\n" +
" \n" +
" I<String, String> i2 = (x, y) -> {\n" +
" System.out.println(x);\n" +
" System.out.println(y);\n" +
" };\n" +
" i2.foo(\"Hello !\", \"World\");\n" +
" }\n" +
"}\n",
},
"long = 1234\n" +
"args length = 0\n" +
"double = 1234.5678\n" +
"x = 9876\n" +
"y = 4321\n" +
"Hello !\n" +
"World");
}
public void test049() {
this.runConformTest(
new String[] {
"X.java",
"interface I<T, J> {\n" +
" void foo(X x, T t, J j);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" I<String, String> i = X::foo;\n" +
" i.foo(new X(), \"Hello\", \"World!\");\n" +
" }\n" +
" void foo(String s, String t) {\n" +
" System.out.println(s);\n" +
" System.out.println(t);\n" +
" }\n" +
"}\n",
},
"Hello\n" +
"World!");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test050() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x, int y);\n" +
"}\n" +
"public class X {\n" +
" static private void add(int x, int y) {\n" +
" System.out.println(x + y);\n" +
" }\n" +
" private void multiply(int x, int y) {\n" +
" System.out.println(x * y);\n" +
" }\n" +
" static class Y {\n" +
" static private void subtract(int x, int y) {\n" +
" System.out.println(x - y);\n" +
" }\n" +
" private void divide (int x, int y) {\n" +
" System.out.println(x / y);\n" +
" }\n" +
" static void doy() {\n" +
" I i = X::add;\n" +
" i.foo(1234, 12);\n" +
" i = new X()::multiply;\n" +
" i.foo(12, 20);\n" +
" i = Y::subtract;\n" +
" i.foo(123, 13);\n" +
" i = new Y()::divide;\n" +
" i.foo(99, 9);\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" I i = X::add;\n" +
" i.foo(1234, 12);\n" +
" i = new X()::multiply;\n" +
" i.foo(12, 20);\n" +
" i = Y::subtract;\n" +
" i.foo(123, 13);\n" +
" i = new Y()::divide;\n" +
" i.foo(99, 9);\n" +
" Y.subtract(10, 7);\n" +
" Y.doy();\n" +
" }\n" +
"}\n",
},
"1246\n" +
"240\n" +
"110\n" +
"11\n" +
"3\n" +
"1246\n" +
"240\n" +
"110\n" +
"11");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test051() {
this.runConformTest(
new String[] {
"p2/B.java",
"package p2;\n" +
"import p1.*; \n" +
"interface I {\n" +
" void foo();\n" +
"}\n" +
"interface J {\n" +
" void foo();\n" +
"}\n" +
"public class B extends A {\n" +
" class Y {\n" +
" void g() {\n" +
" I i = B::foo;\n" +
" i.foo();\n" +
" J j = new B()::goo;\n" +
" j.foo();\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new B().new Y().g();\n" +
" }\n" +
"}\n",
"p1/A.java",
"package p1;\n" +
"import p2.*;\n" +
"public class A {\n" +
" protected static void foo() {\n" +
" System.out.println(\"A's static foo\");\n" +
" }\n" +
" protected void goo() {\n" +
" System.out.println(\"A's instance goo\");\n" +
" }\n" +
"}"
},
"A\'s static foo\n" +
"A\'s instance goo");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406773, [1.8][compiler][codegen] "java.lang.IncompatibleClassChangeError" caused by attempted invocation of private constructor
public void test052() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x);\n" +
"}\n" +
"public class X {\n" +
" void foo() {\n" +
" int local = 10;\n" +
" class Y {\n" +
" void foo(int x) {\n" +
" System.out.println(local);\n" +
" }\n" +
" void goo() {\n" +
" I i = this::foo;\n" +
" i.foo(10);\n" +
" }\n" +
" }\n" +
" new Y().goo();\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().foo();\n" +
" }\n" +
"}\n"
},
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406847, [1.8] lambda code compiles but then produces IncompatibleClassChangeError when run
public void test053() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" public static <E> void printItem(E value, int index) {\n" +
" String output = String.format(\"%d -> %s\", index, value);\n" +
" System.out.println(output);\n" +
" }\n" +
" public static void main(String[] argv) {\n" +
" List<String> list = Arrays.asList(\"A\",\"B\",\"C\");\n" +
" eachWithIndex(list,X::printItem);\n" +
" }\n" +
" interface ItemWithIndexVisitor<E> {\n" +
" public void visit(E item, int index);\n" +
" }\n" +
" public static <E> void eachWithIndex(List<E> list, ItemWithIndexVisitor<E> visitor) {\n" +
" for (int i = 0; i < list.size(); i++) {\n" +
" visitor.visit(list.get(i), i);\n" +
" }\n" +
" }\n" +
"}\n"
},
"0 -> A\n" +
"1 -> B\n" +
"2 -> C");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406847, [1.8] lambda code compiles but then produces IncompatibleClassChangeError when run
public void test054() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" public static <E> void printItem(E value) {}\n" +
" public static void main(String[] argv) {\n" +
" List<String> list = null;\n" +
" eachWithIndex(list, X::printItem);\n" +
" }\n" +
" interface ItemWithIndexVisitor<E> {\n" +
" public void visit(E item);\n" +
" }\n" +
" public static <E> void eachWithIndex(List<E> list, ItemWithIndexVisitor<E> visitor) {}\n" +
"}\n"
},
"");
}
public void test055() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int i);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" X x = null;\n" +
" I i = x::foo;\n" +
" }\n" +
" int foo(int x) {\n" +
" return x;\n" +
" }\n" +
"}\n"
},
"");
}
public void test056() {
this.runConformTest(
false /* skipJavac */,
JavacTestOptions.Excuse.JavacGeneratesIncorrectCode,
new String[] {
"X.java",
"interface I {\n" +
" void foo(int i);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" X x = null;\n" +
" I i = x::foo;\n" +
" try {\n" +
" i.foo(10);\n" +
" } catch (NullPointerException npe) {\n" +
" System.out.println(npe.getMessage());\n" +
" }\n" +
" }\n" +
" int foo(int x) {\n" +
" return x;\n" +
" }\n" +
"}\n"
},
"null");
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=410114, [1.8] CCE when trying to parse method reference expression with inappropriate type arguments
public void test057() {
String source = "interface I {\n" +
" void foo(Y<String> y);\n" +
"}\n" +
"public class Y<T> {\n" +
" class Z<K> {\n" +
" Z(Y<String> y) {\n" +
" System.out.println(\"Y<T>.Z<K>:: new\");\n" +
" }\n" +
" public void bar() {\n" +
" I i = Y<String>.Z<Integer>::<String> new;\n" +
" i.foo(new Y<String>());\n" +
" i = Y<String>.Z<Integer>:: new;\n" +
" i.foo(new Y<String>());\n" +
" i = Y.Z:: new;\n" +
" i.foo(new Y<String>());\n" +
" }\n" +
" }\n" +
" public void foo() {\n" +
" Z<String> z = new Z<String>(null);\n" +
" z.bar();\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" Y<String> y = new Y<String>();\n" +
" y.foo();\n" +
" }\n" +
"}\n";
this.runConformTest(
new String[]{"Y.java",
source},
"Y<T>.Z<K>:: new\n" +
"Y<T>.Z<K>:: new\n" +
"Y<T>.Z<K>:: new\n" +
"Y<T>.Z<K>:: new");
}
// Bug 411273 - [1.8][compiler] Bogus error about unhandled exceptions for unchecked exceptions thrown by method reference.
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=411273
public void test058() {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String[] args) {\n" +
" F1 f = X::foo;\n" +
" System.out.println(\"Hello, World\");\n" +
" }\n" +
" static int foo (int x) throws NumberFormatException { return 0; }\n" +
"}\n" +
"interface F1 { int X(int x);}\n"
},
"Hello, World"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=420582, [1.8][compiler] Compiler should allow creation of generic array creation with unbounded wildcard type arguments
public void testGenericArrayCreation() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X<?, ?, ?>[] makeArray(int i);\n" +
"}\n" +
"public class X<T, U, V> {\n" +
" public static void main(String [] args) {\n" +
" I i = X<?, ?, ?>[]::new; // OK.\n" +
" System.out.println(i.makeArray(1024).length);\n" +
" }\n" +
"}\n" +
""
},
"1024"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=421536, [1.8][compiler] Verify error with small program when preserved unused variables is off.
public void test421536() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_PreserveUnusedLocal, CompilerOptions.OPTIMIZE_OUT);
runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" I foo();\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" try {\n" +
" I i = () -> null;\n" +
" } catch (NullPointerException npe) {}\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=421536, [1.8][compiler] Verify error with small program when preserved unused variables is off.
public void test421536a() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_PreserveUnusedLocal, CompilerOptions.OPTIMIZE_OUT);
runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo();\n" +
"}\n" +
"public class X {\n" +
" public static void foo() {}\n" +
" public static void main(String[] args) {\n" +
" try {\n" +
" I i = X::foo;\n" +
" } catch (NullPointerException npe) {}\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=421607, [1.8][compiler] Verify Error with intersection casts
public void test421607() {
runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" public void foo();\n" +
"}\n" +
"class C implements I {\n" +
" public void foo() {\n" +
" System.out.println(\"You will get here\");\n" +
" }\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" ((C & I) (I) new C()).foo();\n" +
" }\n" +
"}\n"
},
"You will get here");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=421712, [1.8][compiler] java.lang.NoSuchMethodError with lambda expression in interface default method.
public void test421712() {
runConformTest(
new String[] {
"X.java",
"interface F {\n" +
" void foo();\n" +
"}\n" +
"interface I {\n" +
" default void foo() {\n" +
" F f = () -> {\n" +
" };\n" +
" System.out.println(\"Lambda instantiated\");\n" +
" }\n" +
"}\n" +
"public class X implements I {\n" +
" public static void main(String argv[]) {\n" +
" X x = new X();\n" +
" x.foo();\n" +
" }\n" +
"}\n"
},
"Lambda instantiated");
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=422515, [1.8][compiler] "Missing code implementation in the compiler" when lambda body accesses array variable
public void test422515() {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String[] args) throws InterruptedException {\n" +
" final int[] result = { 0 };\n" +
" Thread t = new Thread(() -> result[0] = 42);\n" +
" t.start();\n" +
" t.join();\n" +
" System.out.println(result[0]);\n" +
" }\n" +
"}\n"
},
"42"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=422515, [1.8][compiler] "Missing code implementation in the compiler" when lambda body accesses array variable
public void test422515a() {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String[] args) throws InterruptedException {\n" +
" final int[] result= { 0 };\n" +
" final int x = args.length + 42;\n" +
" Thread t = new Thread(() -> {\n" +
" result[0]= x;\n" +
" });\n" +
" t.start();\n" +
" t.join();\n" +
" System.out.println(result[0]);\n" +
" }\n" +
"}\n"
},
"42"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=422800, [1.8][compiler] "Missing code implementation in the compiler" 2
public void test422800() {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" private String fField; // must be here; can be used or unused\n" +
" public void foo(Integer arg) {\n" +
" new Thread(() -> {\n" +
" arg.intValue();\n" +
" });\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=421927, [1.8][compiler] Bad diagnostic: Unnecessary cast from I to I for lambdas.
public void test421927() {
this.runConformTest(
new String[] {
"X.java",
"interface I { \n" +
" int foo();\n" +
"}\n" +
"public class X {\n" +
" static I i = (I & java.io.Serializable) () -> 42;\n" +
" public static void main(String args[]) {\n" +
" System.out.println(i.foo());\n" +
" }\n" +
"}\n"
},
"42");
}
public void testReferenceExpressionInference1() {
runConformTest(
new String[] {
"X.java",
"interface I<E> {\n" +
" E foo(E e);\n" +
"}\n" +
"public class X {\n" +
" <T> T print(I<T> i) { return null; }\n" +
" void test() {\n" +
" String s = print(this::bar);" +
" }\n" +
" <S> S bar(S s) { return s; }\n" +
"}\n"
});
}
public void testReferenceExpressionInference2() {
runConformTest(
new String[] {
"X.java",
"interface I<E,F> {\n" +
" F foo(E e);\n" +
"}\n" +
"public class X {\n" +
" <S,T,U> I<S,U> compose(I<S,T> i1, I<T,U> i2) { return null; }\n" +
" void test() {\n" +
" I<X,String> x2s = compose(this::bar, this::i2s);" +
" }\n" +
" String i2s (Integer i) { return i.toString(); }\n" +
" <V,W extends Number> W bar(V v) { return null; }\n" +
"}\n"
});
}
public void testReferenceExpressionInference3a() {
runConformTest(
false /* skipJavac*/,
JavacTestOptions.Excuse.JavacDoesNotCompileCorrectSource,
new String[] {
"X.java",
"interface I<E,F> {\n" +
" F foo(E e);\n" +
"}\n" +
"public class X {\n" +
" <S,T,U> I<S,U> compose(I<S,T> i1, I<T,U> i2) { return null; }\n" +
" void test() {\n" +
" I<X,String> x2s = compose(this::bar, this::<String>i2s);" + // help inference with an explicit type argument
" }\n" +
" <Z> Z i2s (Integer i) { return null; }\n" +
" <V,W extends Number> W bar(V v) { return null; }\n" +
"}\n"
}, null);
}
// previous test demonstrates that a solution exists, just inference doesn't find it.
public void testReferenceExpressionInference3b() {
runNegativeTest(
new String[] {
"X.java",
"interface I<E,F> {\n" +
" F foo(E e);\n" +
"}\n" +
"public class X {\n" +
" <S,T,U> I<S,U> compose(I<S,T> i1, I<T,U> i2) { return null; }\n" +
" void test() {\n" +
" I<X,String> x2s = compose(this::bar, this::i2s);\n" +
" }\n" +
" <Z> Z i2s (Integer i) { return null; }\n" +
" <V,W extends Number> W bar(V v) { return null; }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 7)\n" +
" I<X,String> x2s = compose(this::bar, this::i2s);\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from I<Object,Object> to I<X,String>\n" +
"----------\n" +
"2. ERROR in X.java (at line 7)\n" +
" I<X,String> x2s = compose(this::bar, this::i2s);\n" +
" ^^^^^^^^^\n" +
"The type X does not define i2s(Object) that is applicable here\n" +
"----------\n");
}
public void testLambdaInference1() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" public static void main(String[] argv) {\n" +
" List<String> list = null;\n" +
" eachWithIndex(list, s -> print(s));\n" +
" }\n" +
" static void print(String s) {}\n" +
" interface ItemWithIndexVisitor<E> {\n" +
" public void visit(E item);\n" +
" }\n" +
" public static <E> void eachWithIndex(List<E> list, ItemWithIndexVisitor<E> visitor) {}\n" +
"}\n"
},
"");
}
public void testLambdaInference2() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"class A {}\n" +
"class B extends A {\n" +
" void bar() {}\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] argv) {\n" +
" someWithIndex(getList(), (B b) -> b.bar());\n" +
" }\n" +
" interface ItemWithIndexVisitor<E> {\n" +
" public void visit(E item);\n" +
" }\n" +
" public static <G> void someWithIndex(List<G> list, ItemWithIndexVisitor<G> visitor) {}\n" +
" static <I extends A> List<I> getList() { return null; }\n" +
"}\n"
},
"");
}
public void testBug419048_1() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"import java.util.stream.*;\n" +
"public class X {\n" +
" public void test() {\n" +
" List<Person> roster = new ArrayList<>();\n" +
" \n" +
" Map<String, Person> map = \n" +
" roster\n" +
" .stream()\n" +
" .collect(\n" +
" Collectors.toMap(\n" +
" p -> p.getLast(),\n" +
" p -> p\n" +
" ));\n" +
" }\n" +
"}\n" +
"class Person {\n" +
" public String getLast() { return null; }\n" +
"}\n"
});
}
public void testBug419048_2() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"import java.util.stream.*;\n" +
"public class X {\n" +
" public void test() {\n" +
" List<Person> roster = new ArrayList<>();\n" +
" \n" +
" Map<String, Person> map = \n" +
" roster\n" +
" .stream()\n" +
" .collect(\n" +
" Collectors.toMap(\n" +
" Person::getLast,\n" +
" Function.identity()\n" +
" ));\n" +
" }\n" +
"}\n" +
"class Person {\n" +
" public String getLast() { return null; }\n" +
"}\n"
});
}
public void testBug419048_3() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"import java.util.stream.*;\n" +
"public class X {\n" +
" public void test() {\n" +
" List<Person> roster = new ArrayList<>();\n" +
" \n" +
" Map<String, Person> map = \n" +
" roster\n" +
" .stream()\n" +
" .collect(\n" +
" Collectors.toMap(\n" +
" new Function<Person, String>() {\n" +
" public String apply(Person p) { \n" +
" return p.getLast(); \n" +
" } \n" +
" },\n" +
" Function.identity()\n" +
" ));\n" +
" }\n" +
"}\n" +
"class Person {\n" +
" public String getLast() { return null; }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=424226, [1.8] Cannot use static method from an interface in static method reference
public void test424226() {
runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public void fun1() {\n" +
" FI fi = I::staticMethod; \n" +
" }\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n" +
"@FunctionalInterface\n" +
"interface FI {\n" +
" void foo(); \n" +
"}\n" +
"interface I {\n" +
" static FI staticMethod() {\n" +
" return null;\n" +
" }\n" +
"}\n"
}, "OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=423684, [1.8][compiler] IllegalAccessError using functional consumer calling inherited method
public void test423684() {
runConformTest(
new String[] {
"Test.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import mypackage.MyPublicClass;\n" +
"public class Test {\n" +
" public static void main(String[] args) {\n" +
" doesWork();\n" +
" doesNotWork();\n" +
" }\n" +
" public static void doesNotWork() {\n" +
" MyPublicClass victim = new MyPublicClass();\n" +
" List<String> items = Arrays.asList(\"first\", \"second\", \"third\");\n" +
" items.forEach(victim::doSomething); //illegal access error here\n" +
" }\n" +
" public static void doesWork() {\n" +
" MyPublicClass victim = new MyPublicClass();\n" +
" List<String> items = Arrays.asList(\"first\", \"second\", \"third\");\n" +
" for (String item : items) {\n" +
" victim.doSomething(item);\n" +
" }\n" +
" }\n" +
"}\n",
"mypackage/MyPublicClass.java",
"package mypackage;\n" +
"class MyPackagePrivateBaseClass {\n" +
" public void doSomething(String input) {\n" +
" System.out.println(input);\n" +
" }\n" +
"}\n" +
"public class MyPublicClass extends MyPackagePrivateBaseClass {\n" +
"}\n"
},
"first\n" +
"second\n" +
"third\n" +
"first\n" +
"second\n" +
"third");
}
public void testBug424742() {
runNegativeTest(
new String[] {
"TestInlineLambdaArray.java",
"package two.test;\n" +
"\n" +
"class TestInlineLambdaArray {\n" +
" TestInlineLambdaArray h = new TestInlineLambdaArray(x -> x++); // [9]\n" +
" public TestInlineLambda(FI fi) {}\n" +
"}\n" +
"\n" +
"interface FI {\n" +
" void foo();\n" +
"}\n"
},
"----------\n" +
"1. ERROR in TestInlineLambdaArray.java (at line 4)\n" +
" TestInlineLambdaArray h = new TestInlineLambdaArray(x -> x++); // [9]\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"The constructor TestInlineLambdaArray((<no type> x) -> {}) is undefined\n" +
"----------\n" +
"2. ERROR in TestInlineLambdaArray.java (at line 5)\n" +
" public TestInlineLambda(FI fi) {}\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Return type for the method is missing\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=424589, [1.8][compiler] NPE in TypeSystem.getUnannotatedType
public void test424589() {
runNegativeTest(
new String[] {
"X.java",
"import java.util.List;\n" +
"import java.util.Collection;\n" +
"import java.util.function.Supplier;\n" +
"import java.util.Set;\n" +
"public class X {\n" +
" public static <T, Y extends Collection<T>>\n" +
" Y foo(Supplier<Y> y) {\n" +
" return null;\n" +
" } \n" +
" public static void main(String[] args) {\n" +
" Set<Z> x = foo(Set::new);\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 11)\n" +
" Set<Z> x = foo(Set::new);\n" +
" ^\n" +
"Z cannot be resolved to a type\n" +
"----------\n" +
"2. ERROR in X.java (at line 11)\n" +
" Set<Z> x = foo(Set::new);\n" +
" ^^^\n" +
"Cannot instantiate the type Set\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=425152, [1.8] [compiler] NPE in LambdaExpression.analyzeCode
public void test425152() {
runConformTest(
new String[] {
"Main.java",
"interface Base { \n" +
" Base get(int x);\n" +
"}\n" +
"class Main {\n" +
" <T> Base foo(Base b) { \n" +
" return null; \n" +
" }\n" +
" void bar(Base b) { }\n" +
" void testCase() {\n" +
" bar(foo((int p)->null));\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=425512, [1.8][compiler] Arrays should be allowed in intersection casts
public void test425512() throws Exception {
this.runNegativeTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"public class X {\n" +
" public static void main(String argv[]) {\n" +
" int [] a = (int [] & Cloneable & Serializable) new int[5];\n" +
" System.out.println(a.length);\n" +
" }\n" +
"}\n",
},
"----------\n" +
"1. ERROR in X.java (at line 4)\n" +
" int [] a = (int [] & Cloneable & Serializable) new int[5];\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Arrays are not allowed in intersection cast operator\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=424628, [1.8][compiler] Multiple method references to inherited method throws LambdaConversionException
public void test424628() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static interface Consumer<T> {\n" +
" void accept(T t);\n" +
" }\n" +
" \n" +
" public static class Base {\n" +
" public void method () { System.out.println(123); }\n" +
" }\n" +
" public static class Foo extends Base {}\n" +
" public static class Bar extends Base {}\n" +
"\n" +
" public static void main (String[] args) {\n" +
" Consumer<Foo> foo = Foo::method;\n" +
" Consumer<Bar> bar = Bar::method;\n" +
" foo.accept(new Foo());\n" +
" bar.accept(new Bar());\n" +
" }\n" +
"}\n",
},
"123\n123");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=425712, [1.8][compiler] Valid program rejected by the compiler.
public void test425712() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" {\n" +
" bar( () -> (char) 0); // [1]\n" +
" }\n" +
" void bar(FB fb) { }\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n" +
"interface FB {\n" +
" byte foo();\n" +
"}\n",
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426074, [1.8][compiler] 18.5.2 Functional interface parameterization inference problem with intersection types.
public void test426074() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"interface Functional<T> {\n" +
" void foo(T t);\n" +
"}\n" +
"interface I { }\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Functional<? extends X> f = (Functional<? extends X> & I) (X c) -> {\n" +
" System.out.println(\"main\");\n" +
" };\n" +
" f.foo(null);\n" +
" }\n" +
"}\n",
},
"main");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426411, [1.8][compiler] NoSuchMethodError at runtime due to emission order of casts in intersection casts
public void test426411() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"public class X {\n" +
" public static void main(String argv[]) throws Exception {\n" +
" ((Serializable & AutoCloseable) (() -> {})).close();\n" +
" }\n" +
"}\n",
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426411, [1.8][compiler] NoSuchMethodError at runtime due to emission order of casts in intersection casts
public void test426411b() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"interface AnotherAutoCloseable extends AutoCloseable {}\n" +
"public class X {\n" +
" public static void main(String argv[]) throws Exception {\n" +
" ((Serializable & AnotherAutoCloseable) (() -> {})).close();\n" +
" }\n" +
"}\n",
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426411, [1.8][compiler] NoSuchMethodError at runtime due to emission order of casts in intersection casts
public void test426411c() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"public class X {\n" +
" public static void main(String argv[]) throws Exception {\n" +
" ((AutoCloseable & Serializable) (() -> {})).close();\n" +
" }\n" +
"}\n",
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426411, [1.8][compiler] NoSuchMethodError at runtime due to emission order of casts in intersection casts
public void test426411d() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"interface AnotherAutoCloseable extends AutoCloseable {}\n" +
"public class X {\n" +
" public static void main(String argv[]) throws Exception {\n" +
" ((AnotherAutoCloseable & Serializable) (() -> {})).close();\n" +
" }\n" +
"}\n",
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426411, [1.8][compiler] NoSuchMethodError at runtime due to emission order of casts in intersection casts
public void test426411e() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"interface I {}\n" +
"interface J extends I {\n" +
" static final int xyz = 99;\n" +
"}\n" +
"public class X {\n" +
" public static void main(String argv[]) throws Exception {\n" +
" J j = new J() {};\n" +
" System.out.println(((I & J) j).xyz);\n" +
" }\n" +
"}\n",
},
"99");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426411, [1.8][compiler] NoSuchMethodError at runtime due to emission order of casts in intersection casts
public void test426411f() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"interface I {}\n" +
"interface J extends I {\n" +
" final int xyz = 99;\n" +
"}\n" +
"public class X {\n" +
" public static void main(String argv[]) throws Exception {\n" +
" J j = new J() {};\n" +
" System.out.println(((I & J) j).xyz);\n" +
" }\n" +
"}\n",
},
"99");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426086, [1.8] LambdaConversionException when method reference to an inherited method is invoked from sub class
public void test426086() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"interface Functional {\n" +
" Long square(Integer a);\n" +
"}\n" +
"public class X {\n" +
" static class Base {\n" +
" private Long square(Integer a) {\n" +
" return Long.valueOf(a*a);\n" +
" } \n" +
" }\n" +
" static class SubClass extends Base {\n" +
" public Long callSquare(Integer i) {\n" +
" Functional fi = SubClass.super::square;\n" +
" return fi.square(i);\n" +
" }\n" +
" }\n" +
" public static void main(String argv[]) throws Exception {\n" +
" System.out.println(new SubClass().callSquare(-3));\n" +
" }\n" +
"}\n",
},
"9");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=426086, [1.8] LambdaConversionException when method reference to an inherited method is invoked from sub class
public void test426086a() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"interface Functional {\n" +
" Long square(Integer a);\n" +
"}\n" +
"public class X {\n" +
" static class Base {\n" +
" private Long square(Integer a) {\n" +
" return Long.valueOf(a*a);\n" +
" } \n" +
" }\n" +
" static class SubClass extends Base {\n" +
" public Long callSquare(Integer i) {\n" +
" Functional fi = super::square;\n" +
" return fi.square(i);\n" +
" }\n" +
" }\n" +
" public static void main(String argv[]) throws Exception {\n" +
" System.out.println(new SubClass().callSquare(-3));\n" +
" }\n" +
"}\n",
},
"9");
}
// Bug 406744 - [1.8][compiler][codegen] LambdaConversionException seen when method reference targets a varargs method.
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=406744
public void test406744a() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(Integer a1, Integer a2, String a3);\n" +
"}\n" +
"class Y {\n" +
" static void m(Number a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = Y::m;\n" +
" i.foo(10, 20, \"10, 20\");\n" +
" }\n" +
"}\n",
},
"10\n" +
"20\n" +
"10, 20"
);
}
public void test406744b() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" int foo(Integer a1, Integer a2, String a3);\n" +
"}\n" +
"class Y {\n" +
" static int m(Number a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" return 1;\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = Y::m;\n" +
" i.foo(10, 20, \"10, 20\");\n" +
" }\n" +
"}\n",
},
"10\n" +
"20\n" +
"10, 20"
);
}
public void test406744c() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(Integer a1, Integer a2, String a3);\n" +
"}\n" +
"class Y {\n" +
" Y(Number a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" }\n" +
" static void m(Number a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" I i = Y::new;\n" +
" i.foo(10, 20, \"10, 20\");\n" +
" }\n" +
"}\n",
},
"10\n" +
"20\n" +
"10, 20"
);
}
public void test406744d() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int a1, Integer a2, String a3);\n" +
"}\n" +
"interface Y {\n" +
" static void m(float a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public interface X extends Y{\n" +
" public static void main(String [] args) {\n" +
" I i = Y::m;\n" +
" i.foo(10, 20, \"10, 20\");\n" +
" }\n" +
"}\n",
},
"10.0\n" +
"20\n" +
"10, 20"
);
}
public void test406744e() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String method(int a);\n" +
"}\n" +
"class C {\n" +
" static String foo(Integer... i) {\n" +
" return \"foo\";\n" +
" }\n" +
" static String goo(Integer bi, Integer... i) {\n" +
" return \"bar\";\n" +
" }\n" +
" public void foo() {\n" +
" I i;\n" +
" i = C::foo;\n" +
" System.out.println(i.method(0));\n" +
" i = C::goo;\n" +
" System.out.println(i.method(0));\n" +
" }\n" +
"}\n" +
"public class X {\n" +
" public static void main(String argv[]) {\n" +
" new C().foo();\n" +
" }\n" +
"}\n",
},
"foo\n" +
"bar"
);
}
public void test406744f() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(Integer a1, Integer a2, String a3);\n" +
"}\n" +
"class Y {\n" +
" void m(Number a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X extends Y {\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" new X().foo();\n" +
" }\n" +
" void foo() {\n" +
" I i = super::m;\n" +
" i.foo(10, 20, \"10, 20\");\n" +
" }\n" +
"}\n",
},
"10\n" +
"20\n" +
"10, 20"
);
}
public void test406744g() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(Integer a1, Integer a2, String a3);\n" +
"}\n" +
"class Y {\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X extends Y {\n" +
" private void m(Number a1, Object... rest) {\n" +
" System.out.println(a1);\n" +
" print(rest);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" new X().foo();\n" +
" }\n" +
" void foo() {\n" +
" I i = this::m;\n" +
" i.foo(10, 20, \"10, 20\");\n" +
" }\n" +
"}\n",
},
"10\n" +
"20\n" +
"10, 20"
);
}
public void test406744h() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int [] ia);\n" +
"}\n" +
"class Y {\n" +
" void m(Object... rest) {\n" +
" System.out.println(\"Hello \" + rest.length);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X extends Y {\n" +
" public static void main(String [] args) {\n" +
" new X().foo();\n" +
" }\n" +
" void foo() {\n" +
" I i = super::m;\n" +
" i.foo(new int [0]);\n" +
" }\n" +
"}\n",
},
"Hello 1"
);
}
public void test406744i() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int [] ia);\n" +
"}\n" +
"interface I1 {\n" +
" void foo(int [] ia);\n" +
"}\n" +
"class Y {\n" +
" void m(Object... rest) {\n" +
" System.out.println(\"Hello \" + rest.length);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X extends Y {\n" +
" public static void main(String [] args) {\n" +
" new X().foo();\n" +
" }\n" +
" void foo() {\n" +
" I i = super::m;\n" +
" i.foo(new int [0]);\n" +
" I1 i1 = super::m;\n" +
" i1.foo(new int [0]);\n" +
" }\n" +
"}\n",
},
"Hello 1\n" +
"Hello 1"
);
}
public void test406744j() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int [] ia);\n" +
"}\n" +
"class Y {\n" +
" void m(Object... rest) {\n" +
" I i = this::n;\n" +
" i.foo(new int [0]);\n" +
" }\n" +
" void n(Object... rest) {\n" +
" System.out.println(\"Hello \" + rest.length);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"public class X extends Y {\n" +
" public static void main(String [] args) {\n" +
" new X().foo();\n" +
" }\n" +
" void foo() {\n" +
" I i = super::m;\n" +
" i.foo(new int [0]);\n" +
" }\n" +
"}\n",
},
"Hello 1"
);
}
public void test406744k() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int [] ia);\n" +
"}\n" +
"class Y {\n" +
" static void m(Object... rest) {\n" +
" System.out.println(\"Hello \" + rest.length);\n" +
" }\n" +
" static void print (Object [] o) {\n" +
" for (int i = 0; i < o.length; i++)\n" +
" System.out.println(o[i]);\n" +
" }\n" +
"}\n" +
"class Y1 extends Y { }\n" +
"public class X {\n" +
" public static void main(String [] args) {\n" +
" new X().foo();\n" +
" }\n" +
" void foo() {\n" +
" I i = Y::m;\n" +
" i.foo(new int [0]);\n" +
" i = Y1::m;\n" +
" i.foo(new int [0]);\n" +
" }\n" +
"}\n",
},
"Hello 1\n" +
"Hello 1"
);
}
public void test406744l() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(Integer i);\n" +
"}\n" +
"public class X {\n" +
" static void foo(int ... x) {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" I i = X::foo;\n" +
" i.foo(1);\n" +
" System.out.println(\"Hello\");\n" +
"}\n" +
"}\n",
},
"Hello"
);
}
public void test406744m() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int i);\n" +
"}\n" +
"public class X {\n" +
" static void foo(int ... x) {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" I i = X::foo;\n" +
" i.foo(1);\n" +
" System.out.println(\"Hello\");\n" +
" }\n" +
"}\n",
},
"Hello"
);
}
public void test406744n() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(Integer i);\n" +
"}\n" +
"class Base {\n" +
" void foo(Object ...objects) {\n" +
" System.out.println(\"Ok\");\n" +
" }\n" +
"}\n" +
"public class X extends Base {\n" +
" void foo(Object... objects) {\n" +
" throw new RuntimeException();\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().goo();\n" +
" }\n" +
" void goo() {\n" +
" I i = super::foo;\n" +
" i.foo(10);\n" +
" }\n" +
"}\n",
},
"Ok"
);
}
public void test406744o() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x);\n" +
"}\n" +
"class Base {\n" +
" public void foo(int ...is) {\n" +
" System.out.println(\"foo\");\n" +
" }\n" +
"}\n" +
"public class X extends Base {\n" +
" public static void main( String[] args ) {\n" +
" I i = new X()::foo;\n" +
" i.foo(10);\n" +
" }\n" +
"}\n",
},
"foo"
);
}
public void test406744p() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x);\n" +
"}\n" +
"public class X {\n" +
" private void foo(int ...is) {\n" +
" System.out.println(\"foo\");\n" +
" }\n" +
" public static void main(String[] args ) {\n" +
" new X().new Y().foo();\n" +
" }\n" +
" class Y extends X {\n" +
" void foo() {\n" +
" I i = new X()::foo;\n" +
" i.foo(10);\n" +
" }\n" +
" }\n" +
"}\n",
},
"foo"
);
}
public void test406744q() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x);\n" +
"}\n" +
"class Y {\n" +
" public static void foo(int ...is) {\n" +
" System.out.println(\"Y.foo\");\n" +
" }\n" +
"}\n" +
"public class X {\n" +
" public static void foo(int ...is) {\n" +
" System.out.println(\"X.foo\");\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" I i = X::foo;\n" +
" i.foo(10);\n" +
" i = Y::foo;\n" +
" i.foo(20);\n" +
" }\n" +
"}\n",
},
"X.foo\n" +
"Y.foo"
);
}
public void test406744r() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int t, int [] ia);\n" +
"}\n" +
"public class X {\n" +
" public static void foo(Integer i, int ...is) {\n" +
" System.out.println(\"Y.foo\");\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" I i = X::foo;\n" +
" i.foo(10, null);\n" +
" }\n" +
"}\n",
},
"Y.foo"
);
}
public void test406744s() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X foo(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y extends X {\n" +
" Y(int ... x) {\n" +
" System.out.println(\"Y::Y\");\n" +
" }\n" +
" }\n" +
" public static void main(String[] args ) {\n" +
" new X().goo();\n" +
" }\n" +
" void goo() {\n" +
" I i = Y::new;\n" +
" i.foo(10);\n" +
" }\n" +
"}\n",
},
"Y::Y"
);
}
public void test406744t() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X foo(int x);\n" +
"}\n" +
"public class X<T> {\n" +
" class Y extends X {\n" +
" Y(int ... x) {\n" +
" System.out.println(\"Y::Y\");\n" +
" }\n" +
" }\n" +
" public static void main(String[] args ) {\n" +
" System.out.println(\"Hello\");\n" +
" new X().goo();\n" +
" }\n" +
" void goo() {\n" +
" I i = Y::new;\n" +
" i.foo(10);\n" +
" }\n" +
"}\n",
},
"Hello\n" +
"Y::Y"
);
}
public void test406744u() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X<String> foo(int x);\n" +
"}\n" +
"public class X<T> { \n" +
" class Y extends X<String> {\n" +
" Y(int ... x) {\n" +
" System.out.println(\"Y::Y\"); \n" +
" }\n" +
" }\n" +
" public static void main(String[] args ) {\n" +
" System.out.println(\"Hello\");\n" +
" new X<String>().goo(); \n" +
" }\n" +
" void goo() {\n" +
" I i = Y::new;\n" +
" i.foo(10); \n" +
" }\n" +
"}\n",
},
"Hello\n" +
"Y::Y"
);
}
public void test406744v() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X foo();\n" +
"}\n" +
"public class X {\n" +
" private X(int ... is) {\n" +
" System.out.println(\"X::X\");\n" +
" }\n" +
" \n" +
" public static void main(String[] args) {\n" +
" new X().new Y().goo();\n" +
" }\n" +
" public class Y {\n" +
" public void goo() {\n" +
" I i = X::new; \n" +
" i.foo();\n" +
" } \n" +
" }\n" +
"}\n",
},
"X::X\n" +
"X::X"
);
}
public void test406744w() {
this.runConformTest(
new String[] {
"p2/B.java",
"package p2;\n" +
"import p1.*;\n" +
"interface I {\n" +
" void foo(int x);\n" +
"}\n" +
"interface J {\n" +
" void foo(int x);\n" +
"}\n" +
"public class B extends A {\n" +
" class Y {\n" +
" void g() {\n" +
" I i = B::foo;\n" +
" i.foo(10);\n" +
" J j = new B()::goo;\n" +
" j.foo(10);\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new B().new Y().g();\n" +
" }\n" +
"}\n",
"p1/A.java",
"package p1;\n" +
"import p2.*;\n" +
"public class A {\n" +
" protected static void foo(int ... is) {\n" +
" System.out.println(\"A's static foo\");\n" +
" }\n" +
" protected void goo(int ... is) {\n" +
" System.out.println(\"A's instance goo\");\n" +
" }\n" +
"}\n"
},
"A\'s static foo\n" +
"A\'s instance goo"
);
}
public void test406744x() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void foo(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y {\n" +
" void goo() {\n" +
" I i = X::goo;\n" +
" i.foo(10);\n" +
" }\n" +
" }\n" +
" private static void goo(Integer i) {\n" +
" System.out.println(i);\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().new Y().goo(); \n" +
" }\n" +
"}\n"
},
"10"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=427483, [Java 8] Variables in lambdas sometimes can't be resolved
public void test427483() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.TreeSet;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" new TreeSet<>((String qn1, String qn2) -> {\n" +
" boolean b = true;\n" +
" System.out.println(b); // ok\n" +
" if (b) {\n" +
" } // Eclipse says: b cannot be resolved or is not a field\n" +
" return qn1.compareTo(qn2);\n" +
" });\n" +
" }\n" +
"}\n"
},
""
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=427627, [1.8] List.toArray not compiled correctly (NoSuchMethodError) within Lambda
public void test427627() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Runnable r = () -> {\n" +
" List<SourceKey> keys = new ArrayList<>();\n" +
"\n" +
" associate(\"Test\", keys.toArray(new SourceKey[keys.size()]));\n" +
" };\n" +
" r.run();\n" +
" }\n" +
" private static void associate(String o, SourceKey... keys) {\n" +
" System.out.println(o);\n" +
" System.out.println(keys.length);\n" +
" }\n" +
" public class SourceKey {\n" +
" public SourceKey(Object source, Object key) {\n" +
" }\n" +
" }\n" +
"}\n"
},
"Test\n0"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=427744, [1.8][compiler][regression] Issue with boxing compatibility in poly conditional
public void test427744() {
this.runConformTest(
new String[] {
"X.java",
"public class X { \n" +
" public static void main(String argv[]) {\n" +
" int i = ((I) (x) -> { return 999; }).foo(true ? 0 : (Comparable) null);\n" +
" System.out.println(i);\n" +
" }\n" +
" interface I {\n" +
" int foo (Comparable arg); \n" +
" default int foo (Object arg) { \n" +
" return 0;\n" +
" }\n" +
" }\n" +
"}\n"
},
"999"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=427962, [1.8][compiler] Stream#toArray(String[]::new) not inferred without help
public void test427962() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Function;\n" +
"import java.util.function.IntFunction;\n" +
"import java.util.stream.Stream;\n" +
"import java.util.stream.IntStream;\n" +
"public class X {\n" +
" static <A, B> Stream<B> objmap(Function<A, B> p1, A[] p2) {return Stream.of(p2).map(p1);}\n" +
" static <B> Stream<B> intmap(IntFunction<B> p1, int[] p2) {return IntStream.of(p2).mapToObj(p1);}\n" +
" public static void main(String[] args) {\n" +
" Integer[] p12 = {1, 2, 3};\n" +
" int[] p22 = {1, 2, 3};\n" +
" //works\n" +
" String[] a11 = objmap(String::valueOf, p12).<String> toArray(String[]::new);\n" +
" String[] a21 = intmap(String::valueOf, p22).<String> toArray(String[]::new);\n" +
" //does not work\n" +
" String[] a12 = objmap(String::valueOf, p12).toArray(String[]::new);\n" +
" String[] a22 = intmap(String::valueOf, p22).toArray(String[]::new);\n" +
" }\n" +
"}\n"
},
""
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428112, [1.8][compiler] ClassCastException in ReferenceExpression.generateCode
public void test428112() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.Locale;\n" +
"import java.util.stream.Collectors;\n" +
"import java.util.stream.Stream;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" System.out.println(Locale.lookup(Stream.of( \"de\", \"*-CH\" ).map(Locale.LanguageRange::new).collect(Collectors.toList()), \n" +
" Arrays.asList(Locale.getAvailableLocales())));\n" +
" }\n" +
"}\n"
},
"de"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428003, [1.8][compiler] Incorrect error on lambda expression when preceded by another explicit lambda expression
public void test428003() { // extracted small test
this.runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Arrays.sort(args, (String x, String y) -> x.length() - y.length());\n" +
" Arrays.sort(args, (x, y) -> Integer.compare(x.length(), y.length()));\n" +
" }\n" +
"}\n"
},
""
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428003, [1.8][compiler] Incorrect error on lambda expression when preceded by another explicit lambda expression
public void test428003a() { // full test case
this.runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" String[] words = {\"java\", \"interface\", \"lambda\", \"expression\" };\n" +
" Arrays.sort(words, (String word1, String word2) -> {\n" +
" if (word1.length() < word2.length())\n" +
" return -1;\n" +
" else if (word1.length() > word2.length())\n" +
" return 1;\n" +
" else\n" +
" return 0;\n" +
" });\n" +
" for (String word : words)\n" +
" System.out.println(word);\n" +
" words = new String [] {\"java\", \"interface\", \"lambda\", \"expression\" };\n" +
" Arrays.sort(words, (word1, word2) -> Integer.compare(word1.length(), word2.length()));\n" +
" for (String word : words)\n" +
" System.out.println(word);\n" +
" words = new String [] {\"java\", \"interface\", \"lambda\", \"expression\" };\n" +
" Arrays.sort(words, (String word1, String word2) -> Integer.compare(word1.length(), word2.length()));\n" +
" for (String word : words)\n" +
" System.out.println(word);\n" +
" }\n" +
" }\n"
},
"java\n" +
"lambda\n" +
"interface\n" +
"expression\n" +
"java\n" +
"lambda\n" +
"interface\n" +
"expression\n" +
"java\n" +
"lambda\n" +
"interface\n" +
"expression"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428261, [1.8][compiler] Incorrect error: No enclosing instance of the type X is accessible in scope
public void test428261() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X foo(int a);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" String s = \"Blah\";\n" +
" class Local extends X {\n" +
" Local(int a) {\n" +
" System.out.println(a);\n" +
" System.out.println(s);\n" +
" }\n" +
" }\n" +
" I i = Local::new; // Incorrect error here.\n" +
" i.foo(10);\n" +
" }\n" +
"}\n"
},
"10\n" +
"Blah"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428261, [1.8][compiler] Incorrect error: No enclosing instance of the type X is accessible in scope
public void test428261a() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X foo(int a);\n" +
"}\n" +
"public class X {\n" +
" void goo() {\n" +
" class Local extends X {\n" +
" Local(int a) {\n" +
" System.out.println(a);\n" +
" }\n" +
" }\n" +
" I i = Local::new;\n" +
" i.foo(10);\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" new X().goo();\n" +
" }\n" +
"}\n"
},
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428552, [1.8][compiler][codegen] Serialization does not work for method references
public void test428552() {
this.runConformTest(
new String[] {
"X.java",
"import java.io.*;\n" +
"public class X {\n" +
" interface Example extends Serializable {\n" +
" String convert(Object o);\n" +
" }\n" +
" public static void main(String[] args) throws IOException {\n" +
" Example e=Object::toString;\n" +
" try(ObjectOutputStream os=new ObjectOutputStream(new ByteArrayOutputStream())) {\n" +
" os.writeObject(e);\n" +
" }\n" +
" System.out.println(\"No exception !\");\n" +
" }\n" +
"}\n"
},
"No exception !",
null,
true,
new String [] { "-Ddummy" }); // Not sure, unless we force the VM to not be reused by passing dummy vm argument, the generated program aborts midway through its execution.);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428642, [1.8][compiler] java.lang.IllegalArgumentException: Invalid lambda deserialization exception
public void test428642() {
this.runConformTest(
new String[] {
"QuickSerializedLambdaTest.java",
"import java.io.*;\n" +
"import java.util.function.IntConsumer;\n" +
"public class QuickSerializedLambdaTest {\n" +
" interface X extends IntConsumer,Serializable{}\n" +
" public static void main(String[] args) throws IOException, ClassNotFoundException {\n" +
" X x1 = i -> System.out.println(i);// lambda expression\n" +
" X x2 = System::exit; // method reference\n" +
" ByteArrayOutputStream debug=new ByteArrayOutputStream();\n" +
" try(ObjectOutputStream oo=new ObjectOutputStream(debug))\n" +
" {\n" +
" oo.writeObject(x1);\n" +
" oo.writeObject(x2);\n" +
" }\n" +
" try(ObjectInputStream oi=new ObjectInputStream(new ByteArrayInputStream(debug.toByteArray())))\n" +
" {\n" +
" X x=(X)oi.readObject();\n" +
" x.accept(42);// shall print 42\n" +
" x=(X)oi.readObject();\n" +
" x.accept(0);// shall exit\n" +
" }\n" +
" throw new AssertionError(\"should not reach this point\");\n" +
" }\n" +
"}\n"
},
"42",
null,
true,
new String [] { "-Ddummy" }); // Not sure, unless we force the VM to not be reused by passing dummy vm argument, the generated program aborts midway through its execution.);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429112, [1.8][compiler] Exception when compiling Serializable array constructor reference
public void test429112() {
this.runConformTest(
new String[] {
"ArrayConstructorReference.java",
"import java.io.Serializable;\n" +
"import java.util.function.IntFunction;\n" +
"public class ArrayConstructorReference {\n" +
" interface IF extends IntFunction<Object>, Serializable {}\n" +
" public static void main(String[] args) {\n" +
" IF factory=String[][][]::new;\n" +
" Object o = factory.apply(10);\n" +
" System.out.println(o.getClass());\n" +
" String [][][] sa = (String [][][]) o;\n" +
" System.out.println(sa.length);\n" +
" }\n" +
"}\n"
},
"class [[[Ljava.lang.String;\n" +
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429112, [1.8][compiler] Exception when compiling Serializable array constructor reference
public void test429112a() {
this.runConformTest(
new String[] {
"ArrayConstructorReference.java",
"import java.io.Serializable;\n" +
"import java.util.function.IntFunction;\n" +
"public class ArrayConstructorReference {\n" +
" interface IF extends IntFunction<Object>, Serializable {}\n" +
" public static void main(String[] args) {\n" +
" IF factory=java.util.function.IntFunction[][][]::new;\n" +
" Object o = factory.apply(10);\n" +
" System.out.println(o.getClass());\n" +
" java.util.function.IntFunction[][][] sa = (java.util.function.IntFunction[][][]) o;\n" +
" System.out.println(sa.length);\n" +
" }\n" +
"}\n"
},
"class [[[Ljava.util.function.IntFunction;\n" +
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429112, [1.8][compiler] Exception when compiling Serializable array constructor reference
public void test429112b() {
this.runConformTest(
new String[] {
"ArrayConstructorReference.java",
"import java.io.Serializable;\n" +
"import java.util.function.IntFunction;\n" +
"public class ArrayConstructorReference {\n" +
" interface IF extends IntFunction<Object>, Serializable {}\n" +
" public static void main(String[] args) {\n" +
" IF factory=java.util.function.IntFunction[]::new;\n" +
" Object o = factory.apply(10);\n" +
" System.out.println(o.getClass());\n" +
" java.util.function.IntFunction[] sa = (java.util.function.IntFunction[]) o;\n" +
" System.out.println(sa.length);\n" +
" }\n" +
"}\n"
},
"class [Ljava.util.function.IntFunction;\n" +
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429112, [1.8][compiler] Exception when compiling Serializable array constructor reference
public void test429112c() {
this.runConformTest(
new String[] {
"ArrayConstructorReference.java",
"import java.io.Serializable;\n" +
"import java.util.function.IntFunction;\n" +
"public class ArrayConstructorReference {\n" +
" interface IF extends IntFunction<Object>, Serializable {}\n" +
" public static void main(String[] args) {\n" +
" IF factory=String[]::new;\n" +
" Object o = factory.apply(10);\n" +
" System.out.println(o.getClass());\n" +
" String [] sa = (String []) o;\n" +
" System.out.println(sa.length);\n" +
" }\n" +
"}\n"
},
"class [Ljava.lang.String;\n" +
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428857, [1.8] Method reference to instance method of generic class incorrectly gives raw type warning
public void test428857() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_ReportRawTypeReference, CompilerOptions.ERROR);
this.runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.function.Function;\n" +
"public class X {\n" +
" public static void main (String[] args) {\n" +
" Function<List<String>, String> func = List::toString;\n" +
" System.out.println(func.apply(Arrays.asList(\"a\", \"b\")));\n" +
" }\n" +
"}\n"
},
"[a, b]",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428857, - [1.8] Method reference to instance method of generic class incorrectly gives raw type warning
public void test428857a() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_ReportRawTypeReference, CompilerOptions.ERROR);
runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.ArrayList;\n" +
"import java.util.function.Function;\n" +
"interface I {\n" +
" List<String> getList();\n" +
"}\n" +
"public class X {\n" +
" public static void main (String[] args) {\n" +
" I i = ArrayList::new;\n" +
" System.out.println(i.getList());\n" +
" }\n" +
"}\n"
},
"[]",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428857, - [1.8] Method reference to instance method of generic class incorrectly gives raw type warning
public void test428857b() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_ReportRawTypeReference, CompilerOptions.ERROR);
runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.ArrayList;\n" +
"import java.util.function.Function;\n" +
"interface I {\n" +
" ArrayList<String> getList();\n" +
"}\n" +
"public class X {\n" +
" public static void main (String[] args) {\n" +
" I i = ArrayList::new;\n" +
" System.out.println(i.getList());\n" +
" }\n" +
"}\n"
},
"[]",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428857, [1.8] Method reference to instance method of generic class incorrectly gives raw type warning
public void test428857c() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_ReportRawTypeReference, CompilerOptions.ERROR);
this.runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.function.Function;\n" +
"import java.util.ArrayList;\n" +
"public class X {\n" +
" public static void main (String[] args) {\n" +
" Function<ArrayList<String>, String> func = List::toString;\n" +
" System.out.println(func.apply(new ArrayList<>(Arrays.asList(\"a\", \"b\"))));\n" +
" }\n" +
"}\n"
},
"[a, b]",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429763, [1.8][compiler] Incompatible type specified for lambda expression's parameter
public void test429763() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Function;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" try {\n" +
" final int i = new Test<Integer>().test((Byte b) -> (int) b);\n" +
" } catch (NullPointerException e) {\n" +
" System.out.println(\"NPE\");\n" +
" }\n" +
" }\n" +
" static class Test<R> {\n" +
" <T> R test(Function<T,R> f) {\n" +
" return null;\n" +
" }\n" +
" }\n" +
"}\n"
},
"NPE");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429763, [1.8][compiler] Incompatible type specified for lambda expression's parameter
public void test429763a() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Function;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" // does not compile\n" +
" new Test<Integer>().test((Byte b) -> (int) b);\n" +
" }\n" +
" static class Test<R> {\n" +
" <T> void test(Function<T,R> f) {\n" +
" }\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429759, [1.8][compiler] Lambda expression's signature matching error
public void test429759() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Function;\n" +
"import java.util.function.Supplier;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" final int i = new Test<Integer>().test(\"\", (String s) -> 1);\n" +
" }\n" +
" static class Test<R> {\n" +
" <T> R test(T t, Supplier<R> s) {\n" +
" return s.get();\n" +
" }\n" +
" <T> R test(T t, Function<T, R> f) {\n" +
" return f.apply(t);\n" +
" }\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429948, Unhandled event loop exception is thrown when a lambda expression is nested
public void test429948() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Supplier;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" execute(() -> {\n" +
" executeInner(() -> {\n" +
" });\n" +
" return null;\n" +
" });\n" +
" System.out.println(\"done\");\n" +
" }\n" +
" static <R> R execute(Supplier<R> supplier) {\n" +
" return null;\n" +
" }\n" +
" static void executeInner(Runnable callback) {\n" +
" }\n" +
"}\n"
},
"done");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=429969, [1.8][compiler] Possible RuntimeException in Lambda tangles ECJ
public void test429969() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.Optional;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" final String s = Arrays.asList(\"done\").stream().reduce(null, (s1,s2) -> {\n" +
" // THE FOLLOWING LINE CAUSES THE PROBLEM\n" +
" require(s1 != null || s2 != null, \"both strings are null\");\n" +
" return (s1 != null) ? s1 : s2;\n" +
" }, (s1,s2) -> (s1 != null) ? s1 : s2);\n" +
" \n" +
" System.out.println(s);\n" +
" }\n" +
" static void require(boolean condition, String msg) throws RuntimeException {\n" +
" if (!condition) {\n" +
" throw new RuntimeException(msg);\n" +
" }\n" +
" }\n" +
"}\n"
},
"done");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430015, [1.8] NPE trying to disassemble classfile with lambda method and MethodParameters
public void test430015() {
this.runConformTest(
new String[] {
"X.java",
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Parameter;\n" +
"import java.util.Arrays;\n" +
"import java.util.function.IntConsumer;\n" +
"public class X {\n" +
" IntConsumer xx(int a) {\n" +
" return i -> { };\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" Method[] methods = X.class.getDeclaredMethods();\n" +
" for (Method method : methods) {\n" +
" if (method.getName().contains(\"lambda\")) {\n" +
" Parameter[] parameters = method.getParameters();\n" +
" System.out.println(Arrays.asList(parameters));\n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
"[int arg0]");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430040, [1.8] [compiler] Type Type mismatch: cannot convert from Junk13.ExpressionHelper<Object> to Junk13.ExpressionHelper<Object>
public void test430040() {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
" class Observable<T> {}\n" +
" class ObservableValue<T> {}\n" +
" interface InvalidationListener {\n" +
" public void invalidated(Observable observable);\n" +
" }\n" +
" public interface ChangeListener<T> {\n" +
" void changed(ObservableValue<? extends T> observable, T oldValue, T newValue);\n" +
" }\n" +
" static class ExpressionHelper<T> {}\n" +
" public static <T> ExpressionHelper<T> addListener(ExpressionHelper<T> helper, ObservableValue<T> observable, InvalidationListener listener) {\n" +
" return helper;\n" +
" }\n" +
" public static <T> ExpressionHelper<T> addListener(ExpressionHelper<T> helper, ObservableValue<T> observable, ChangeListener<? super T> listener) {\n" +
" return helper;\n" +
" }\n" +
" private ExpressionHelper<Object> helper;\n" +
" public void junk() {\n" +
" helper = (ExpressionHelper<Object>) addListener(helper, null, (Observable o) -> {throw new RuntimeException();});\n" +
" helper = addListener(helper, null, (Observable o) -> {throw new RuntimeException();});\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430043, [1.8][compiler] Cannot infer type arguments for Junk14<>
public void test430043() {
this.runConformTest(
new String[] {
"X.java",
"import java.io.File;\n" +
"import java.io.IOException;\n" +
"import java.io.StringReader;\n" +
"import java.nio.file.Files;\n" +
"import java.text.MessageFormat;\n" +
"import java.util.*;\n" +
"import java.util.function.Function;\n" +
"import java.util.jar.Attributes;\n" +
"import java.util.jar.JarFile;\n" +
"import java.util.jar.Manifest;\n" +
"public class X<T> {\n" +
" public X(String name, String description, String id, Class<T> valueType, String[] fallbackIDs, Function<Map<String, ? super Object>, T> defaultValueFunction, boolean requiresUserSetting, Function<String, T> stringConverter) {\n" +
" }\n" +
" public static final X<String> NAME =\n" +
" new X<>(\n" +
" null,\n" +
" null,\n" +
" null,\n" +
" String.class,\n" +
" null,\n" +
" params -> {throw new IllegalArgumentException(\"junk14\");},\n" +
" true,\n" +
" s -> s\n" +
" );\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Consumer;\n" +
"public class X {\n" +
" interface StringConsumer extends Consumer<String> {\n" +
" void accept(String t);\n" +
" }\n" +
" public static void main(String... x) {\n" +
" StringConsumer c = s->System.out.println(\"m(\"+s+')');\n" +
" c.accept(\"direct call\");\n" +
" Consumer<String> c4b=c;\n" +
" c4b.accept(\"bridge method\");\n" +
" }\n" +
"}\n"
},
"m(direct call)\n" +
"m(bridge method)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035a() { // test reference expressions requiring bridges.
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Consumer;\n" +
"public class X {\n" +
" interface StringConsumer extends Consumer<String> {\n" +
" void accept(String t);\n" +
" }\n" +
" static void m(String s) { System.out.println(\"m(\"+s+\")\"); } \n" +
" public static void main(String... x) {\n" +
" StringConsumer c = X::m;\n" +
" c.accept(\"direct call\");\n" +
" Consumer<String> c4b=c;\n" +
" c4b.accept(\"bridge method\");\n" +
" }\n" +
"}\n"
},
"m(direct call)\n" +
"m(bridge method)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035b() {
this.runConformTest(
new String[] {
"X.java",
"interface I<T> {\n" +
" void foo(T t);\n" +
"}\n" +
"interface J<T> {\n" +
" void foo(T t);\n" +
"}\n" +
"interface K extends I<String>, J<String> {\n" +
"}\n" +
"public class X {\n" +
" public static void main(String... x) {\n" +
" K k = s -> System.out.println(\"m(\"+s+')');\n" +
" k.foo(\"direct call\");\n" +
" J<String> j = k;\n" +
" j.foo(\"bridge method\");\n" +
" I<String> i = k;\n" +
" i.foo(\"bridge method\");\n" +
" }\n" +
"}\n"
},
"m(direct call)\n" +
"m(bridge method)\n" +
"m(bridge method)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035c() {
this.runConformTest(
new String[] {
"X.java",
"interface I<T> {\n" +
" void foo(String t, T u);\n" +
"}\n" +
"interface J<T> {\n" +
" void foo(T t, String u);\n" +
"}\n" +
"interface K extends I<String>, J<String> {\n" +
" void foo(String t, String u);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String... x) {\n" +
" K k = (s, u) -> System.out.println(\"m(\"+ s + u + ')');\n" +
" k.foo(\"direct\", \" call\");\n" +
" J<String> j = k;\n" +
" j.foo(\"bridge\", \" method(j)\");\n" +
" I<String> i = k;\n" +
" i.foo(\"bridge\", \" method(i)\");\n" +
" }\n" +
"}\n"
},
"m(direct call)\n" +
"m(bridge method(j))\n" +
"m(bridge method(i))");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035d() { // 8b131 complains of ambiguity.
this.runConformTest(
new String[] {
"X.java",
"interface I<T> {\n" +
" void foo(String t, T u);\n" +
"}\n" +
"interface J<T> {\n" +
" void foo(T t, String u);\n" +
"}\n" +
"interface K extends I<String>, J<String> {\n" +
"}\n" +
"public class X {\n" +
" public static void main(String... x) {\n" +
" K k = (s, u) -> System.out.println(\"m(\"+ s + u + ')');\n" +
" k.foo(\"direct\", \" call\");\n" +
" J<String> j = k;\n" +
" j.foo(\"bridge\", \" method(j)\");\n" +
" I<String> i = k;\n" +
" i.foo(\"bridge\", \" method(i)\");\n" +
" }\n" +
"}\n"
},
"m(direct call)\n" +
"m(bridge method(j))\n" +
"m(bridge method(i))");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035e() { // 8b131 complains of ambiguity in call.
this.runConformTest(
new String[] {
"X.java",
"interface I<T> {\n" +
" Object foo(String t, T u);\n" +
"}\n" +
"interface J<T> {\n" +
" String foo(T t, String u);\n" +
"}\n" +
"interface K extends I<String>, J<String> {\n" +
"}\n" +
"public class X {\n" +
" public static void main(String... x) {\n" +
" K k = (s, u) -> s + u;\n" +
" System.out.println(k.foo(\"direct\", \" call\"));\n" +
" J<String> j = k;\n" +
" System.out.println(j.foo(\"bridge\", \" method(j)\"));\n" +
" I<String> i = k;\n" +
" System.out.println(i.foo(\"bridge\", \" method(i)\"));\n" +
" }\n" +
"}\n"
},
"direct call\n" +
"bridge method(j)\n" +
"bridge method(i)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430035, [1.8][compiler][codegen] Bridge methods are not generated for lambdas/method references
public void test430035f() { // ensure co-variant return emits a bridge request.
this.runConformTest(
new String[] {
"X.java",
"interface I<T> {\n" +
" Object foo(String t, String u);\n" +
"}\n" +
"interface J<T> {\n" +
" String foo(String t, String u);\n" +
"}\n" +
"interface K extends I<String>, J<String> {\n" +
"}\n" +
"public class X {\n" +
" public static void main(String... x) {\n" +
" K k = (s, u) -> s + u;\n" +
" System.out.println(k.foo(\"direct\", \" call\"));\n" +
" J<String> j = k;\n" +
" System.out.println(j.foo(\"bridge\", \" method(j)\"));\n" +
" I<String> i = k;\n" +
" System.out.println(i.foo(\"bridge\", \" method(i)\"));\n" +
" }\n" +
"}\n"
},
"direct call\n" +
"bridge method(j)\n" +
"bridge method(i)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430241, [1.8][compiler] Raw return type results in incorrect covariant return bridge request to LambdaMetaFactory
public void test430241() { // ensure raw return type variant does not emit a bridge request.
this.runConformTest(
new String[] {
"X.java",
"interface K extends I, J {\n" +
"}\n" +
"interface I {\n" +
" Comparable<Integer> foo();\n" +
"}\n" +
"interface J {\n" +
" Comparable foo();\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" K k = () -> null;\n" +
" System.out.println(k.foo());\n" +
" }\n" +
"}\n"
},
"null");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430310, [1.8][compiler] Functional interface incorrectly rejected as not being.
public void test430310() {
this.runConformTest(
new String[] {
"X.java",
"interface Func1<T1, R> {\n" +
" R apply(T1 v1);\n" +
" void other();\n" +
"}\n" +
"@FunctionalInterface // spurious error: F1<T, R> is not a functional interface\n" +
"public interface X<T1, R> extends Func1<T1, R> {\n" +
" default void other() {}\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430310, [1.8][compiler] Functional interface incorrectly rejected as not being.
public void test430310a() {
this.runConformTest(
new String[] {
"X.java",
"@FunctionalInterface\n" +
"public interface X<T1, T2, R> {\n" +
" R apply(T1 v1, T2 v2);\n" +
" default void other() {}\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430310, [1.8][compiler] Functional interface incorrectly rejected as not being.
public void test430310b() {
this.runConformTest(
new String[] {
"X.java",
"interface I1 {\n" +
" int foo(String s);\n" +
"}\n" +
"@FunctionalInterface\n" +
"interface A1 extends I1 {\n" +
" @Override\n" +
" default int foo(String s) {\n" +
" return -1;\n" +
" }\n" +
" int foo(java.io.Serializable s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430310, [1.8][compiler] Functional interface incorrectly rejected as not being.
public void test430310c() {
this.runConformTest(
new String[] {
"X.java",
"interface I2 {\n" +
" int foo(String s);\n" +
"}\n" +
"@FunctionalInterface\n" +
"interface A2 extends I2 {\n" +
" @Override\n" +
" default int foo(String s) {\n" +
" return -1;\n" +
" }\n" +
" int bar(java.io.Serializable s);\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432619, [1.8] Bogus error from method reference: "should be accessed in a static way"
public void test432619() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.BiConsumer;\n" +
"public interface X<E extends Exception> {\n" +
" static void foo() {\n" +
" BiConsumer<double[][], Double> biConsumer2 = Re2::accumulate;\n" +
" }\n" +
" static class Re2 {\n" +
" static void accumulate(double[][] container, Double value) {}\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432619, [1.8] Bogus error from method reference: "should be accessed in a static way"
public void test432619a() throws Exception {
this.runConformTest(
new String[] {
"StreamInterface.java",
"import java.util.Map;\n" +
"import java.util.stream.Collector;\n" +
"public interface StreamInterface<E extends Exception> {\n" +
" static class DoubleCo {\n" +
" private static class Re2 {\n" +
" static <K, E extends Exception> Map<K, double[]> internalToMapToList2() {\n" +
" Collector<Double, double[][], double[][]> toContainer1 = Collector.of(\n" +
" //The method supply() from the type StreamInterface.DoubleCo.Re2 should be accessed in a static way\n" +
" StreamInterface.DoubleCo.Re2::supply,\n" +
" //The method accumulate(double[][], Double) from the type StreamInterface.DoubleCo.Re2 should be accessed in a static way\n" +
" StreamInterface.DoubleCo.Re2::accumulate,\n" +
" //The method combine(double[][], double[][]) from the type StreamInterface.DoubleCo.Re2 should be accessed in a static way\n" +
" StreamInterface.DoubleCo.Re2::combine);\n" +
" Collector<Double, double[][], double[][]> toContainer2 =\n" +
" //All 3 from above:\n" +
" Collector.of(DoubleCo.Re2::supply, DoubleCo.Re2::accumulate, DoubleCo.Re2::combine);\n" +
" return null;\n" +
" }\n" +
" private static double[][] supply() {\n" +
" return new double[64][];\n" +
" }\n" +
" private static void accumulate(double[][] container, Double value) {}\n" +
" private static double[][] combine(double[][] container, double[][] containerRight) {\n" +
" return new double[container.length + containerRight.length][];\n" +
" }\n" +
" }\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n"
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432682, [1.8][compiler] Type mismatch error with lambda expression
public void test432682() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.util.Optional;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Optional<String> userName = Optional.of(\"sa\");\n" +
" Optional<String> password = Optional.of(\"sa\");\n" +
" boolean isValid = userName.flatMap(u -> {\n" +
" return password.map(p -> {\n" +
" return u.equals(\"sa\") && p.equals(\"sa\");\n" +
" });\n" +
" }).orElse(false);\n" +
" System.out.println(isValid);\n" +
" }\n" +
"}\n"
},
"true");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432520, compiler "duplicate method" bug with lamdas and generic interfaces
public void test432520() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void withProvider(Provider<String> provider) { }\n" +
" public static void main(String [] args) {\n" +
" withProvider(() -> \"user\");\n" +
" }\n" +
"}\n" +
"interface ParentProvider<T> {\n" +
" T get();\n" +
"}\n" +
"// if you remove the extends clause everything works fine\n" +
"interface Provider<T> extends ParentProvider<T> {\n" +
" T get();\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432625, [1.8] VerifyError with lambdas and wildcards
public void test432625() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.util.stream.Stream;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Stream<?> stream = Stream.of(\"A\");\n" +
" stream.map(x -> (String) x);\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430766, [1.8] Internal compiler error.
public void test430766() {
this.runNegativeTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.Comparator;\n" +
"import java.util.List;\n" +
"public class X {\n" +
" static class Person {\n" +
" private String email;\n" +
" public Person(String email) {\n" +
" this.email = email;\n" +
" }\n" +
" public String getEmail() {\n" +
" return email;" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" List<Person> persons = new ArrayList<Person>();\n" +
" persons.add(new Person(\"joe.smith@gmail.com\"));\n" +
" persons.add(new Person(\"alice.smith@gmail.com\"));\n" +
" persons.sort(Comparator.comparing(Comparator.nullsLast(Person::getEmail)));\n" +
" }\n" +
"}\n",
},
"----------\n" +
"1. ERROR in X.java (at line 17)\n" +
" persons.sort(Comparator.comparing(Comparator.nullsLast(Person::getEmail)));\n" +
" ^^^^^^^^^\n" +
"The method nullsLast(Comparator<? super T>) in the type Comparator is not applicable for the arguments (Person::getEmail)\n" +
"----------\n" +
"2. ERROR in X.java (at line 17)\n" +
" persons.sort(Comparator.comparing(Comparator.nullsLast(Person::getEmail)));\n" +
" ^^^^^^^^^^^^^^^^\n" +
"The type X.Person does not define getEmail(T, T) that is applicable here\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=430766, [1.8] Internal compiler error.
public void test430766a() {
this.runNegativeTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.Comparator;\n" +
"import java.util.List;\n" +
"import java.io.Serializable;\n" +
"public class X {\n" +
" static class Person {\n" +
" private String email;\n" +
" public Person(String email) {\n" +
" this.email = email;\n" +
" }\n" +
" public String getEmail() {\n" +
" return email;" +
" }\n" +
" public static <T extends Runnable,V extends Serializable> int isRunnable(T first, V second) {\n" +
" return (second instanceof Runnable) ? 1 : 0;\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" List<Person> persons = new ArrayList<Person>();\n" +
" persons.add(new Person(\"joe.smith@gmail.com\"));\n" +
" persons.add(new Person(\"alice.smith@gmail.com\"));\n" +
" persons.sort(Comparator.comparing(Comparator.nullsLast(Person::<Runnable>isRunnable)));\n" +
" }\n" +
"}\n",
},
"----------\n" +
"1. ERROR in X.java (at line 21)\n" +
" persons.sort(Comparator.comparing(Comparator.nullsLast(Person::<Runnable>isRunnable)));\n" +
" ^^^^^^^^^\n" +
"The method nullsLast(Comparator<? super T>) in the type Comparator is not applicable for the arguments (Person::<Runnable>isRunnable)\n" +
"----------\n" +
"2. ERROR in X.java (at line 21)\n" +
" persons.sort(Comparator.comparing(Comparator.nullsLast(Person::<Runnable>isRunnable)));\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"The type X.Person does not define isRunnable(T, T) that is applicable here\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=431190, [1.8] VerifyError when using a method reference
public void test431190() throws Exception {
this.runConformTest(
new String[] {
"Java8VerifyError.java",
"public class Java8VerifyError {\n" +
" public static class Foo {\n" +
" public Object get() {\n" +
" return new Object();\n" +
" }\n" +
" }\n" +
" @FunctionalInterface\n" +
" public static interface Provider<T> {\n" +
" public T get();\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" Provider<Foo> f = () -> new Foo();\n" +
" Provider<Provider<Object>> meta = () -> f.get()::get;\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=431514 [1.8] Incorrect compilation error in lambda expression
public void test431514() {
this.runConformTest(
new String[] {
"X.java",
"class X {\n" +
" void fun1(int x) {\n" +
" class Local {\n" +
" FI test= () -> {\n" +
" try {\n" +
" } catch (Exception e) {\n" +
" int x;\n" +
" };\n" +
" };\n" +
" }\n" +
" }\n" +
"}\n" +
"interface FI {\n" +
" void foo();\n" +
"}"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=431514 [1.8] Incorrect compilation error in lambda expression
public void test431514a() {
this.runConformTest(
new String[] {
"X.java",
"class X {\n" +
" void fun1(int x) {\n" +
" class Local {\n" +
" class L1 { }\n" +
" int y;\n" +
" FI test= () -> {\n" +
" class L1 { } \n" +
" int y; \n" +
" };\n" +
" }\n" +
" }\n" +
" \n" +
"}\n" +
"interface FI {\n" +
" void foo();\n" +
"}"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432531 [1.8] VerifyError with anonymous subclass inside of lambda expression in the superclass constructor call
public void test432531() {
this.runConformTest(
new String[] {
"Y.java",
"import java.util.function.Supplier;\n" +
"class E {\n" +
" E(Supplier<Object> factory) { }\n" +
"}\n" +
"public class Y extends E {\n" +
" Y() {\n" +
" super(() -> new Object() {\n" +
" });\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new Y();\n" +
" }\n" +
"}"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=434297 [1.8] NPE in LamdaExpression.analyseCode with lamda expression nested in a conditional expression
public void test434297() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"import java.util.Collections;\n" +
"import java.util.Comparator;\n" +
"import java.util.List;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" }\n" +
" public void bla() {\n" +
" boolean b = Boolean.TRUE.booleanValue();\n" +
" List<String> c1 = new ArrayList<>();\n" +
" Collections.sort(c1, b ? null : new Bar(new ArrayList<>(),Comparator.nullsLast((a,e) -> {return 0;})));\n" +
" }\n" +
" private static class Bar implements Comparator<String>{\n" +
" public <T> Bar(Collection<T> col, Comparator<T> comp) { }\n" +
" @Override\n" +
" public int compare(String o1, String o2) {\n" +
" return 0;\n" +
" }\n" +
" }\n" +
"}"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=436542 : Eclipse 4.4 compiler generates "bad class file" according to javac
public void test436542() throws Exception {
this.runConformTest(
new String[] {
"Utility.java",
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"import java.util.function.Function;\n" +
"import java.util.stream.Collectors;\n" +
"public class Utility {\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"Success\");\n" +
" }\n" +
" public static <T, R> List<R> mapList(Collection<T> original, Function<T, R> func) {\n" +
" return original.stream().map(func).collect(Collectors.toList());\n" +
" }\n" +
" public static <S, T> void bindMap(List<T> dest, ObservableList<S> src, Function<S, T> func) {\n" +
" dest.addAll(mapList(src, func));\n" +
" src.addListener((ListChangeListener<S>) changes -> {\n" +
" for (int i = changes.getFrom(); i < changes.getTo(); i++)\n" +
" dest.set(i, func.apply(src.get(i)));\n" +
" });\n" +
" }\n" +
" public interface ObservableList<E> extends List<E> {\n" +
" public void addListener(ListChangeListener<? super E> listener);\n" +
" }\n" +
" @FunctionalInterface\n" +
" public interface ListChangeListener<E> {\n" +
" public abstract static class Change<E> {\n" +
" public abstract int getFrom();\n" +
" public abstract int getTo();\n" +
" }\n" +
" public void onChanged(Change<? extends E> c);\n" +
" }\n" +
"}",
},
"Success",
Util.concatWithClassLibs(new String[]{OUTPUT_DIR}, false),
true,
null);
IClassFileReader classFileReader = ToolFactory.createDefaultClassFileReader(OUTPUT_DIR + File.separator + "Utility.class", IClassFileReader.ALL);
IMethodInfo lambdaMethod = null;
IMethodInfo[] methodInfos = classFileReader.getMethodInfos();
int length = methodInfos.length;
for (int i = 0; i < length; i++) {
IMethodInfo methodInfo = methodInfos[i];
if ("lambda$0".equals(new String(methodInfo.getName()))) {
lambdaMethod = methodInfo;
break;
}
}
assertNotNull("Could not find lambda method",lambdaMethod);
IClassFileAttribute signature = org.eclipse.jdt.internal.core.util.Util.getAttribute(lambdaMethod, IAttributeNamesConstants.SIGNATURE);
assertNull("Found generic signature for lambda method", signature);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=439515 [1.8] ECJ reports error at method reference to overloaded instance method
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=440643, Eclipse compiler doesn't like method references with overloaded varargs method
public void test439515() {
this.runConformTest(
new String[] {
"X.java",
"interface Fun<T, R> {\n" +
" R apply(T arg);\n" +
"}\n" +
"public class X {\n" +
" int size() {\n" +
" return -1;\n" +
" }\n" +
" int size(Object arg) {\n" +
" return 0;\n" +
" }\n" +
" int size(X arg) {\n" +
" return 1;\n" +
" }\n" +
" public static void main(String args[]) {\n" +
" Fun<X, Integer> f1 = X::size;\n" +
" System.out.println(f1.apply(new X()));\n" +
" }\n" +
"}\n"
},
"-1");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=439515 [1.8] ECJ reports error at method reference to overloaded instance method
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=440643, Eclipse compiler doesn't like method references with overloaded varargs method
public void test439515a() {
this.runConformTest(
new String[] {
"X.java",
"interface Fun<T, R> {\n" +
" R apply(T arg);\n" +
"}\n" +
"public class X {\n" +
" static int size() {\n" +
" return -1;\n" +
" }\n" +
" static int size(Object arg) {\n" +
" return 0;\n" +
" }\n" +
" static int size(X arg) {\n" +
" return 1;\n" +
" }\n" +
" public static void main(String args[]) {\n" +
" Fun<X, Integer> f1 = X::size;\n" +
" System.out.println(f1.apply(new X()));\n" +
" }\n" +
"}\n"
},
"1");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=438534 Java8 java.lang.Method.getGeneric* methods fail with java.lang.reflect.GenericSignatureFormatError: Signature Parse error: Expected Field Type Signature
public void test438534() {
this.runConformTest(
new String[] {
"ByteCodeTest.java",
"import java.lang.reflect.Method;\n" +
"import java.security.AccessController;\n" +
"import java.security.PrivilegedAction;\n" +
"import java.util.Collections;\n" +
"import java.util.Comparator;\n" +
"public class ByteCodeTest {\n" +
" public static class BrokenByteCode {\n" +
" public void hello() {\n" +
" Collections.sort(Collections.<String> emptyList(), Comparator.comparing((String data) -> data.length()));\n" +
" }\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" for (Method method : AccessController.doPrivileged((PrivilegedAction<Method[]>) () -> BrokenByteCode.class.getDeclaredMethods())) {\n" +
" method.getGenericExceptionTypes();\n" +
" method.getGenericParameterTypes();\n" +
" method.getGenericReturnType();\n" +
" }\n" +
" System.out.println(\"SUCCESS\");\n" +
" }\n" +
"}\n"
},
"SUCCESS");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=440152 [codegen]"Missing code implementation in the compiler" on cascaded inner class references
public void test440152() {
this.runConformTest(
new String[] {
"Foo.java",
"import java.util.function.Function;\n" +
"interface Foo {void alpha(Bar pBar);}\n" +
"class Bar {Object bravo() {return null;}}\n" +
"class Test {\n" +
" Test(Function pFunction) {\n" +
" class Baz {public Baz(Object pObj) {pFunction.apply(pObj);}}\n" +
" delta(pBar -> charlie(new Baz(pBar.bravo())));\n" +
" }\n" +
" void charlie(Object pRemovals) {}\n" +
" void delta(Foo pListener) {}\n" +
"}"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=440152 [codegen]"Missing code implementation in the compiler" on cascaded inner class references
public void test440152a() {
this.runConformTest(
new String[] {
"Foo.java",
"import java.util.function.Function;\n" +
"interface Foo {void alpha(Bar pBar);}\n" +
"class Bar {Object bravo() {return null;}}\n" +
"class Test {\n" +
" Test(Function pFunction) {\n" +
" class Baz {\n" +
" public Baz(Object pObj) {\n" +
" }\n" +
" class NestedBaz extends Baz {\n" +
" NestedBaz(Object pObj) {\n" +
" super(pObj);\n" +
" pFunction.apply(pObj);\n" +
" }\n" +
" }\n" +
" }\n" +
" delta(pBar -> charlie(new Baz(pBar).new NestedBaz(pBar.bravo())));\n" +
" }\n" +
" void charlie(Object pRemovals) {}\n" +
" void delta(Foo pListener) {}\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432110, [1.8][compiler] nested lambda type incorrectly inferred vs javac
public void test432110() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Function;\n" +
"public interface X {\n" +
" default void test() {\n" +
" testee().flatMap(_warning_ -> {\n" +
" return result().map(s -> 0);\n" +
" });\n" +
" }\n" +
" Either<Integer, Integer> testee();\n" +
" Either<Integer, String> result();\n" +
" static interface Either<L, R> {\n" +
" <U> Either<L, U> flatMap(Function<? super R, Either<L, U>> mapper);\n" +
" <U> Either<L, U> map(Function<? super R, U> mapper);\n" +
" }\n" +
" public static void main(String [] args) {\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
"}\n",
},
"OK");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=441929, [1.8][compiler] @SuppressWarnings("unchecked") not accepted on local variable
public void test441929() {
this.runNegativeTest(
new String[] {
"Y.java",
"public class Y {\n" +
" @FunctionalInterface\n" +
" interface X {\n" +
" public void x();\n" +
" }\n" +
" public void z(X x) {\n" +
" }\n" +
" public <T> void test() {\n" +
" z(() -> {\n" +
" try {\n" +
" @SuppressWarnings(\"unchecked\") // (1)\n" +
" Class<? extends T> klass = (Class<? extends T>) Class.forName(\"java.lang.Object\"); // (2)\n" +
" System.out.println(klass.getName());\n" +
" } catch (Exception e) {\n" +
" e.printStackTrace();\n" +
" }\n" +
" });\n" +
" }\n" +
"}\n",
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=437781, [1.8][compiler] Eclipse accepts code rejected by javac because of ambiguous method reference
public void test437781() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Consumer;\n" +
"import java.util.function.Function;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" new X().visit( System.out::println );\n" +
" }\n" +
" public boolean visit(Function<Integer, Boolean> func) {\n" +
" System.out.println(\"Function\");\n" +
" return true;\n" +
" }\n" +
" public void visit(Consumer<Integer> func) {\n" +
" System.out.println(\"Consumer\");\n" +
" } \n" +
"}\n"
},
"Consumer");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=443889, [1.8][compiler] Lambdas get compiled to duplicate methods
public void test443889() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.BiConsumer;\n" +
"import java.util.function.Consumer;\n" +
"public class X {\n" +
" public interface CurryBiConsumer<T, U> extends BiConsumer<T, U> {\n" +
" default public CurryConsumer<U> curryFirst(T t) {\n" +
" return (u) -> accept(t, u);\n" +
" }\n" +
" default public CurryConsumer<T> currySecond(U u) {\n" +
" return (t) -> accept(t, u);\n" +
" }\n" +
" }\n" +
" public interface CurryConsumer<T> extends Consumer<T> {\n" +
" default public Runnable curry(T t) {\n" +
" return () -> accept(t);\n" +
" }\n" +
" }\n" +
" static void execute(Runnable r) {\n" +
" System.out.println(\"BEFORE\");\n" +
" r.run();\n" +
" System.out.println(\"AFTER\");\n" +
" }\n" +
" static void display(String str, int count) {\n" +
" System.out.println(\"DISP: \" + str + \" \" + count);\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" CurryBiConsumer<String, Integer> bc = X::display;\n" +
" execute(bc.curryFirst(\"Salomon\").curry(42));\n" +
" }\n" +
"}\n"
},
"BEFORE\n" +
"DISP: Salomon 42\n" +
"AFTER");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=441907, [1.8][compiler] Eclipse 4.4.x compiler generics bugs with streams and lambdas
public void test441907() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"import java.util.function.Predicate;\n" +
"import java.util.stream.Stream;\n" +
"public class X {\n" +
" public static class FooBar<V> {\n" +
" }\n" +
" public interface FooBarred {\n" +
" public <V> boolean hasFooBar(final FooBar<V> fooBar);\n" +
" }\n" +
" public interface Widget extends FooBarred {\n" +
" }\n" +
" public static void test() {\n" +
" Set<FooBar<?>> foobars = new HashSet<>();\n" +
" Set<Widget> widgets = new HashSet<>();\n" +
" Stream<X.FooBar<?>> s = null;\n" +
" FooBarred fb = null;\n" +
" fb.hasFooBar((FooBar<?>) null);\n" +
" boolean anyWidgetHasFooBar = widgets.stream().anyMatch(\n" +
" widget -> foobars.stream().anyMatch(widget::hasFooBar)\n" +
" );\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=444773, [1.8][compiler] NullPointerException in LambdaExpression.analyseCode
public void test444773() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"import java.util.Optional;\n" +
" \n" +
"public class X {\n" +
" static class Container {\n" +
" final private String s;\n" +
" public Container(String s) { this.s = s; }\n" +
" }\n" +
" \n" +
" public static void main(String[] args) {\n" +
" final List<Container> list = new ArrayList<>();\n" +
" final Optional<String> optStr = Optional.of(\"foo\");\n" +
" list.add(new Container(optStr.orElseThrow(() -> new IllegalStateException()))); // Error here\n" +
" \n" +
" // This will work:\n" +
" final String s = optStr.orElseThrow(IllegalStateException::new);\n" +
" list.add(new Container(s)); \n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=444772, [1.8][compiler] NullPointerException in ReferenceExpression.shouldGenerateImplicitLambda
public void test444772() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"import java.util.Optional;\n" +
" \n" +
"public class X {\n" +
" static class Container {\n" +
" final private String s;\n" +
" public Container(String s) { this.s = s; }\n" +
" }\n" +
" \n" +
" public static void main(String[] args) {\n" +
" final List<Container> list = new ArrayList<>();\n" +
" final Optional<String> optStr = Optional.of(\"foo\");\n" +
" list.add(new Container(optStr.orElseThrow(IllegalStateException::new))); // Error here\n" +
" \n" +
" // This will work:\n" +
" final String s = optStr.orElseThrow(IllegalStateException::new);\n" +
" list.add(new Container(s)); \n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=444803, [1.8][compiler] Exception in thread "main" java.lang.VerifyError: Bad local variable type
public void test444803() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"public class X {\n" +
" X abc = null;\n" +
" public static void main(String[] args) {\n" +
" new X();\n" +
" }\n" +
" private void doSth() {\n" +
" final List<String> l = new ArrayList<>();\n" +
" try {\n" +
" System.out.println(\"ok\");\n" +
//" Runnable r = () -> abc.terminateInstances(abc.withInstanceIds(l));\n" +
" } finally {\n" +
" Runnable r = () -> abc.terminateInstances(abc.withInstanceIds(l));\n" +
" }\n" +
" }\n" +
" public void terminateInstances(X abc) {\n" +
" }\n" +
" public X withInstanceIds(Collection<String> arg0) {\n" +
" return null;\n" +
" }\n" +
"}\n" +
"interface FI {\n" +
" public void foo(Collection<String> arg0);\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=444785, [1.8] Error in JDT Core during reconcile
public void test444785() {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"import java.util.function.Function;\n" +
"public interface X {\n" +
" @FunctionalInterface\n" +
" static interface Function1<T1, R> extends Function<T1, R>, Serializable {\n" +
" @Override\n" +
" R apply(T1 t1);\n" +
" }\n" +
" @FunctionalInterface\n" +
" static interface Function6<T1, T2, T3, T4, T5, T6, R> extends Serializable {\n" +
" R apply(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6);\n" +
" default Function1<T1, Function1<T2, Function1<T3, Function1<T4, Function1<T5, Function1<T6, R>>>>>> curried() {\n" +
" return t1 -> t2 -> t3 -> t4 -> t5 -> t6 -> apply(t1, t2, t3, t4, t5, t6);\n" +
" }\n" +
" default Function1<Tuple6<T1, T2, T3, T4, T5, T6>, R> tupled() {\n" +
" return t -> apply(t._1, t._2, t._3, t._4, t._5, t._6);\n" +
" }\n" +
" }\n" +
" static final class Tuple6<T1, T2, T3, T4, T5, T6> {\n" +
" public final T1 _1;\n" +
" public final T2 _2;\n" +
" public final T3 _3;\n" +
" public final T4 _4;\n" +
" public final T5 _5;\n" +
" public final T6 _6;\n" +
" public Tuple6(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6) {\n" +
" this._1 = t1;\n" +
" this._2 = t2;\n" +
" this._3 = t3;\n" +
" this._4 = t4;\n" +
" this._5 = t5;\n" +
" this._6 = t6;\n" +
" }\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=447119, [1.8][compiler] method references lost generic type information (4.4 -> 4.4.1 regression)
public void test447119() {
this.runConformTest(
new String[] {
"X.java",
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Parameter;\n" +
"import java.util.Arrays;\n" +
"import java.util.function.Function;\n" +
"import java.util.List;\n" +
"public class X {\n" +
" private static List<String> foo(List<String> x){return x;}\n" +
" public static void main(String[] args) {\n" +
" Function<List<String>,List<String>> f = i -> { return i; };\n" +
" Method[] methods = X.class.getDeclaredMethods();\n" +
" for (Method m : methods) {\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(\"- \" + m.getGenericReturnType() + \" \" + m.getName() + \"(\" + Arrays.asList(m.getGenericParameterTypes()) + \")\");\n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
"- interface java.util.List lambda$0([interface java.util.List])");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=447119, [1.8][compiler] method references lost generic type information (4.4 -> 4.4.1 regression)
public void test447119a() {
this.runConformTest(
new String[] {
"X.java",
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Parameter;\n" +
"import java.util.Arrays;\n" +
"import java.util.function.Function;\n" +
"import java.util.List;\n" +
"public class X {\n" +
" private static List<String> foo(List<String> x){return x;}\n" +
" public static void main(String[] args) {\n" +
" Function<List<String>,List<String>> f = X::foo;\n" +
" Method[] methods = X.class.getDeclaredMethods();\n" +
" for (Method m : methods) {\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(\"- \" + m.getGenericReturnType() + \" \" + m.getName() + \"(\" + Arrays.asList(m.getGenericParameterTypes()) + \")\");\n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=447119, [1.8][compiler] method references lost generic type information (4.4 -> 4.4.1 regression)
public void test447119b() {
this.runConformTest(
new String[] {
"X.java",
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Parameter;\n" +
"import java.util.Arrays;\n" +
"import java.util.function.Function;\n" +
"import java.util.List;\n" +
"import java.io.Serializable;" +
"public class X {\n" +
" private static interface SerializableFunction<A, R> extends Function<A, R>, Serializable { }" +
" private static List<String> foo(List<String> x){return x;}\n" +
" public static void main(String[] args) {\n" +
" SerializableFunction<List<String>, List<String>> f = i -> { return i; };\n" +
" Method[] methods = X.class.getDeclaredMethods();\n" +
" for (Method m : methods) {\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(\"- \" + m.getGenericReturnType() + \" \" + m.getName() + \"(\" + Arrays.asList(m.getGenericParameterTypes()) + \")\");\n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
"- interface java.util.List lambda$0([interface java.util.List])");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=447119, [1.8][compiler] method references lost generic type information (4.4 -> 4.4.1 regression)
public void test447119c() {
this.runConformTest(
new String[] {
"X.java",
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Parameter;\n" +
"import java.util.Arrays;\n" +
"import java.util.function.Function;\n" +
"import java.util.List;\n" +
"import java.io.Serializable;" +
"public class X {\n" +
" private static interface SerializableFunction<A, R> extends Function<A, R>, Serializable { }" +
" private static List<String> foo(List<String> x){return x;}\n" +
" public static void main(String[] args) {\n" +
" SerializableFunction<List<String>, List<String>> f = X::foo;\n" +
" Method[] methods = X.class.getDeclaredMethods();\n" +
" for (Method m : methods) {\n" +
" if (m.getName().contains(\"foo\")) {\n" +
" System.out.println(\"- \" + m.getGenericReturnType() + \" \" + m.getName() + \"(\" + Arrays.asList(m.getGenericParameterTypes()) + \")\");\n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
"- java.util.List<java.lang.String> foo([java.util.List<java.lang.String>])");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=447119, [1.8][compiler] method references lost generic type information (4.4 -> 4.4.1 regression)
public void test447119d() {
this.runConformTest(
new String[] {
"X.java",
"import java.io.ObjectStreamClass;\n" +
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.util.List;\n" +
"import java.util.function.Function;\n" +
"import java.util.ArrayList;\n" +
"import java.util.Collections;\n" +
"import java.util.Comparator;\n" +
"public class X {\n" +
" private static interface SerializableFunction<A, R> extends Function<A, R>, Serializable { }\n" +
" private static List<String> noop(List<String> l) { return l; }\n" +
" public static void main(String[] args) throws Exception {\n" +
" SerializableFunction<List<String>, List<String>> f = X::noop;\n" +
" Method invokeWriteReplaceMethod = ObjectStreamClass.class.getDeclaredMethod(\"invokeWriteReplace\", Object.class);\n" +
" invokeWriteReplaceMethod.setAccessible(true);\n" +
" SerializedLambda l = (SerializedLambda)invokeWriteReplaceMethod.invoke(ObjectStreamClass.lookupAny(f.getClass()), f);\n" +
" System.out.println(\"Lambda binds to: \" + l.getImplClass() + \".\" + l.getImplMethodName());\n" +
" System.out.println(\"Methods (with generics):\");\n" +
" List<String> list = new ArrayList<String>();\n" +
" for(Method m : X.class.getDeclaredMethods()) {\n" +
" if(m.getName().equals(\"main\")) continue;\n" +
" if(m.getName().contains(\"deserializeLambda\")) continue;\n" +
" list.add(\"- \" + m.getGenericReturnType() + \" \" + m.getName() + \"(\" + m.getGenericParameterTypes()[0] + \")\");\n" +
" }\n" +
" Collections.sort(list, new Comparator<String>() {\n" +
" public int compare(String s1, String s2) {\n" +
" return s1.compareTo(s2);\n" +
" }\n" +
" });\n" +
" System.out.println(list.toString());\n" +
" }\n" +
"}\n"
},
"Lambda binds to: X.noop\n" +
"Methods (with generics):\n" +
"[- java.util.List<java.lang.String> noop(java.util.List<java.lang.String>)]",
null,
true,
new String [] { "-Ddummy" }); // Not sure, unless we force the VM to not be reused by passing dummy vm argument, the generated program aborts midway through its execution.
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=447119, [1.8][compiler] method references lost generic type information (4.4 -> 4.4.1 regression)
public void test447119e() {
this.runConformTest(
new String[] {
"X.java",
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Parameter;\n" +
"import java.util.Arrays;\n" +
"import java.util.function.Function;\n" +
"import java.util.List;\n" +
"public class X implements java.io.Serializable {\n" +
" private static List<String> foo(List<String> x){return x;}\n" +
" public static void main(String[] args) {\n" +
" Function<List<String>,List<String>> f = X::foo;\n" +
" Method[] methods = X.class.getDeclaredMethods();\n" +
" for (Method m : methods) {\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(\"- \" + m.getGenericReturnType() + \" \" + m.getName() + \"(\" + Arrays.asList(m.getGenericParameterTypes()) + \")\");\n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432605, [1.8] Incorrect error "The type ArrayList<T> does not define add(ArrayList<T>, Object) that is applicable here"
public void test432605() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.HashMap;\n" +
"import java.util.function.Function;\n" +
"import java.util.function.Supplier;\n" +
"import java.util.stream.Collector;\n" +
"import java.util.stream.Collectors;\n" +
"import java.util.stream.Stream;\n" +
"public class X {\n" +
"static <T, E extends Exception, K, L, M> M terminalAsMapToList(\n" +
" Function<? super T, ? extends K> classifier,\n" +
" Function<HashMap<K, L>, M> intoMap,\n" +
" Function<ArrayList<T>, L> intoList,\n" +
" Supplier<Stream<T>> supplier,\n" +
" Class<E> classOfE) throws E {\n" +
" return terminalAsCollected(\n" +
" classOfE,\n" +
" Collectors.collectingAndThen(\n" +
" Collectors.groupingBy(\n" +
" classifier,\n" +
" HashMap<K, L>::new,\n" +
" Collectors.collectingAndThen(\n" +
" // The type ArrayList<T> does not define add(ArrayList<T>, Object) that is applicable here\n" +
" // from ArrayList<T>::add:\n" +
" Collector.of(ArrayList<T>::new, ArrayList<T>::add, (ArrayList<T> left, ArrayList<T> right) -> { \n" +
" left.addAll(right);\n" +
" return left;\n" +
" }),\n" +
" intoList)),\n" +
" intoMap),\n" +
" supplier);\n" +
" }\n" +
" static <E extends Exception, T, M> M terminalAsCollected(\n" +
" Class<E> class1,\n" +
" Collector<T, ?, M> collector,\n" +
" Supplier<Stream<T>> supplier) throws E {\n" +
" try(Stream<T> s = supplier.get()) {\n" +
" return s.collect(collector);\n" +
" } catch(RuntimeException e) {\n" +
" throw unwrapCause(class1, e);\n" +
" }\n" +
" }\n" +
" static <E extends Exception> E unwrapCause(Class<E> classOfE, RuntimeException e) throws E {\n" +
" Throwable cause = e.getCause();\n" +
" if(classOfE.isInstance(cause) == false) {\n" +
" throw e;\n" +
" }\n" +
" throw classOfE.cast(cause);\n" +
"}\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=432605, [1.8] Incorrect error "The type ArrayList<T> does not define add(ArrayList<T>, Object) that is applicable here"
public void testreduced432605() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.HashMap;\n" +
"import java.util.function.Function;\n" +
"import java.util.stream.Collector;\n" +
"import java.util.stream.Collectors;\n" +
"public class X {\n" +
" static <T, K, L, M> void foo() {\n" +
" Collector<T, ?, M> cat = \n" +
" Collectors.collectingAndThen(\n" +
" Collectors.groupingBy((Function<? super T, ? extends K>) null, \n" +
" HashMap<K, L>::new, \n" +
" (Collector<T, ArrayList<T>, L>) null), \n" +
" (Function<HashMap<K, L>, M>) null);\n" +
" }\n" +
"}\n"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=448802, [1.8][compiler] Poly invocations interleaved by a impertinent lambda may need some more changes,
public void test448802() throws Exception {
this.runConformTest(
new String[] {
"X.java",
"import java.util.Optional;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Optional<String> userName = Optional.of(\"sa\");\n" +
" Optional<String> password = Optional.of(\"sa\");\n" +
" boolean isValid = userName.flatMap((String u) -> {\n" +
" return password.map((String p) -> {\n" +
" return u.equals(\"sa\") && p.equals(\"sa\");\n" +
" });\n" +
" }).orElse(false);\n" +
" System.out.println(isValid);\n" +
" }\n" +
"}\n"
},
"true");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test {\n" +
" public static interface Map<IN, OUT> {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = (in) -> new Tuple<>();\n" +
" for(Method m : Test.class.getDeclaredMethods()) {\n" +
" // Use the type information stored in signature\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}"
},
"Test.Test$Tuple<java.lang.Integer, java.lang.String>\n" +
"Test.Test$Tuple<java.lang.String, java.lang.Double>",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063a() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test {\n" +
" public static interface Map<IN, OUT> extends Serializable {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = (in) -> new Tuple<>();\n" +
" SerializedLambda sl = getSerializedLambda(map); \n" +
" Method m = getLambdaMethod(sl);\n" +
" // Use the type information stored in signature\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" public static Method getLambdaMethod(SerializedLambda lambda) throws Exception {\n" +
" String implClassName = lambda.getImplClass().replace(\'/\', \'.\');\n" +
" Class<?> implClass = Class.forName(implClassName);\n" +
" String lambdaName = lambda.getImplMethodName();\n" +
" for (Method m : implClass.getDeclaredMethods()) {\n" +
" if (m.getName().equals(lambdaName)) {\n" +
" return m;\n" +
" }\n" +
" }\n" +
" throw new Exception(\"Lambda Method not found\");\n" +
" }\n" +
" public static SerializedLambda getSerializedLambda(Object function) throws Exception {\n" +
" if (function == null || !(function instanceof java.io.Serializable)) {\n" +
" throw new IllegalArgumentException();\n" +
" }\n" +
" for (Class<?> clazz = function.getClass(); clazz != null; clazz = clazz.getSuperclass()) {\n" +
" try {\n" +
" Method replaceMethod = clazz.getDeclaredMethod(\"writeReplace\");\n" +
" replaceMethod.setAccessible(true);\n" +
" Object serializedForm = replaceMethod.invoke(function);\n" +
" if (serializedForm instanceof SerializedLambda) {\n" +
" return (SerializedLambda) serializedForm;\n" +
" }\n" +
" }\n" +
" catch (NoSuchMethodError e) {\n" +
" // fall through the loop and try the next class\n" +
" }\n" +
" catch (Throwable t) {\n" +
" throw new RuntimeException(\"Error while extracting serialized lambda\", t);\n" +
" }\n" +
" }\n" +
" throw new Exception(\"writeReplace method not found\");\n" +
" }\n" +
"}"
},
"Test.Test$Tuple<java.lang.Integer, java.lang.String>\n" +
"Test.Test$Tuple<java.lang.String, java.lang.Double>",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063b() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.DO_NOT_GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test {\n" +
" public static interface Map<IN, OUT> {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = (in) -> new Tuple<>();\n" +
" for(Method m : Test.class.getDeclaredMethods()) {\n" +
" // Use the type information stored in signature\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}"
},
"class Test$Tuple\n" +
"class Test$Tuple",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063c() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.DO_NOT_GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test {\n" +
" public static interface Map<IN, OUT> extends Serializable {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = (in) -> new Tuple<>();\n" +
" SerializedLambda sl = getSerializedLambda(map); \n" +
" Method m = getLambdaMethod(sl);\n" +
" // Use the type information stored in signature\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" public static Method getLambdaMethod(SerializedLambda lambda) throws Exception {\n" +
" String implClassName = lambda.getImplClass().replace(\'/\', \'.\');\n" +
" Class<?> implClass = Class.forName(implClassName);\n" +
" String lambdaName = lambda.getImplMethodName();\n" +
" for (Method m : implClass.getDeclaredMethods()) {\n" +
" if (m.getName().equals(lambdaName)) {\n" +
" return m;\n" +
" }\n" +
" }\n" +
" throw new Exception(\"Lambda Method not found\");\n" +
" }\n" +
" public static SerializedLambda getSerializedLambda(Object function) throws Exception {\n" +
" if (function == null || !(function instanceof java.io.Serializable)) {\n" +
" throw new IllegalArgumentException();\n" +
" }\n" +
" for (Class<?> clazz = function.getClass(); clazz != null; clazz = clazz.getSuperclass()) {\n" +
" try {\n" +
" Method replaceMethod = clazz.getDeclaredMethod(\"writeReplace\");\n" +
" replaceMethod.setAccessible(true);\n" +
" Object serializedForm = replaceMethod.invoke(function);\n" +
" if (serializedForm instanceof SerializedLambda) {\n" +
" return (SerializedLambda) serializedForm;\n" +
" }\n" +
" }\n" +
" catch (NoSuchMethodError e) {\n" +
" // fall through the loop and try the next class\n" +
" }\n" +
" catch (Throwable t) {\n" +
" throw new RuntimeException(\"Error while extracting serialized lambda\", t);\n" +
" }\n" +
" }\n" +
" throw new Exception(\"writeReplace method not found\");\n" +
" }\n" +
"}"
},
"class Test$Tuple\n" +
"class Test$Tuple",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063d() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test {\n" +
" public static interface Map<IN, OUT> {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static Tuple<Integer, String> noop(Tuple<String, Double> t){return null;}\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = Test::noop;\n" +
" for(Method m : Test.class.getDeclaredMethods()) {\n" +
" // Use the type information stored in signature\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}"
},
"",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063e() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.DO_NOT_GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.invoke.SerializedLambda;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test {\n" +
" public static interface Map<IN, OUT> extends Serializable {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static Tuple<Integer, String> noop(Tuple<String, Double> t){return null;}\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = Test::noop;\n" +
" SerializedLambda sl = getSerializedLambda(map); \n" +
" Method m = getLambdaMethod(sl);\n" +
" // Use the type information stored in signature\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" public static Method getLambdaMethod(SerializedLambda lambda) throws Exception {\n" +
" String implClassName = lambda.getImplClass().replace(\'/\', \'.\');\n" +
" Class<?> implClass = Class.forName(implClassName);\n" +
" String lambdaName = lambda.getImplMethodName();\n" +
" for (Method m : implClass.getDeclaredMethods()) {\n" +
" if (m.getName().equals(lambdaName)) {\n" +
" return m;\n" +
" }\n" +
" }\n" +
" throw new Exception(\"Lambda Method not found\");\n" +
" }\n" +
" public static SerializedLambda getSerializedLambda(Object function) throws Exception {\n" +
" if (function == null || !(function instanceof java.io.Serializable)) {\n" +
" throw new IllegalArgumentException();\n" +
" }\n" +
" for (Class<?> clazz = function.getClass(); clazz != null; clazz = clazz.getSuperclass()) {\n" +
" try {\n" +
" Method replaceMethod = clazz.getDeclaredMethod(\"writeReplace\");\n" +
" replaceMethod.setAccessible(true);\n" +
" Object serializedForm = replaceMethod.invoke(function);\n" +
" if (serializedForm instanceof SerializedLambda) {\n" +
" return (SerializedLambda) serializedForm;\n" +
" }\n" +
" }\n" +
" catch (NoSuchMethodError e) {\n" +
" // fall through the loop and try the next class\n" +
" }\n" +
" catch (Throwable t) {\n" +
" throw new RuntimeException(\"Error while extracting serialized lambda\", t);\n" +
" }\n" +
" }\n" +
" throw new Exception(\"writeReplace method not found\");\n" +
" }\n" +
"}"
},
"Test.Test$Tuple<java.lang.Integer, java.lang.String>\n" +
"Test.Test$Tuple<java.lang.String, java.lang.Double>",
customOptions);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=449063, [1.8][compiler] Bring back generic signatures for Lambda Expressions
public void test449063f() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_LambdaGenericSignature, CompilerOptions.GENERATE);
this.runConformTest(
new String[] {
"Test.java",
"import java.io.Serializable;\n" +
"import java.lang.reflect.Method;\n" +
"import java.lang.reflect.Type;\n" +
"public class Test implements Serializable{\n" +
" public static interface Map<IN, OUT> {\n" +
" public OUT map(IN in);\n" +
" }\n" +
" public static Tuple<Integer, String> noop(Tuple<String, Double> t){return null;}\n" +
" public static class Tuple<T1, T2> {\n" +
" private T1 field1;\n" +
" private T2 field2;\n" +
" }\n" +
" public static void main(String[] strings) throws Exception {\n" +
" Map<Tuple<String, Double>, Tuple<Integer, String>> map = Test::noop;\n" +
" for(Method m : Test.class.getDeclaredMethods()) {\n" +
" // Use the type information stored in signature\n" +
" if (m.getName().contains(\"lambda\")) {\n" +
" System.out.println(m.getGenericReturnType());\n" +
" for (Type t : m.getGenericParameterTypes()) {\n" +
" System.out.println(t);\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}"
},
"",
customOptions);
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=445949, Lambda parameter not shadowing in nested scope producing non-existent compilation error
public void test445949() {
this.runConformTest(
new String[] {
"X.java",
"import java.util.function.Consumer;\n" +
"public class X {\n" +
" void methodInFirstLevel(int y) {\n" +
" class Second {\n" +
" int t = y;\n" +
" Consumer<Integer> myConsumer1 = (z) -> {\n" +
" System.out.println(\"z = \" + z);\n" +
" System.out.println(\"y = \" + y);\n" +
" System.out.println(\"t = \" + t);\n" +
" };\n" +
" Consumer<Integer> myConsumer2 = (y) -> {\n" +
" System.out.println(\"y = \" + y);\n" +
" System.out.println(\"t = \" + t);\n" +
" };\n" +
" void foo( int y) {\n" +
" System.out.println(\"y = \" + y);\n" +
" }\n" +
" class Third {\n" +
" Consumer<Integer> myConsumer3 = (y) -> {\n" +
" System.out.println(\"y = \" + y);\n" +
" };\n" +
" }\n" +
" void bar(int y) {\n" +
" new Third().myConsumer3.accept(y);\n" +
" }\n" +
" }\n" +
" new Second().myConsumer1.accept(10);\n" +
" new Second().myConsumer2.accept(20);\n" +
" new Second().foo(30);\n" +
" new Second().bar(40);\n" +
" \n" +
" }\n" +
" void foo() {\n" +
" Consumer<Integer> myConsumer2 = (y) -> {\n" +
" class Inner {\n" +
" Consumer<Integer> myConsumer4 = (y) -> { \n" +
" class InnerMost {\n" +
" Consumer<Integer> myConsumer3 = (y /*error without fix*/) -> {};\n" +
" }\n" +
" };\n" +
" }\n" +
" new Inner().myConsumer4.accept(10);\n" +
" };\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().methodInFirstLevel(5);\n" +
" new X().foo();\n" +
" }\n" +
"}\n"
},
"z = 10\ny = 5\nt = 5\ny = 20\nt = 5\ny = 30\ny = 40");
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=445949, Lambda parameter not shadowing in nested scope producing non-existent compilation error
public void test445949a() {
this.runNegativeTest(
new String[] {
"X.java",
"import java.util.function.Consumer;\n" +
"class X {\n" +
" void foo(int y) {\n" +
" Consumer<Integer> c1 = (y)-> {};\n" +
" }\n" +
" void foo2() {\n" +
" int y;\n" +
" Consumer<Integer> c1 = (y)-> {};\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 4)\n" +
" Consumer<Integer> c1 = (y)-> {};\n" +
" ^\n" +
"Lambda expression's parameter y cannot redeclare another local variable defined in an enclosing scope. \n" +
"----------\n" +
"2. ERROR in X.java (at line 8)\n" +
" Consumer<Integer> c1 = (y)-> {};\n" +
" ^\n" +
"Lambda expression's parameter y cannot redeclare another local variable defined in an enclosing scope. \n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=456395, can't compile the Java8 code
public void test456395() {
this.runConformTest(
new String[] {
"Test.java",
"import java.io.*;\n" +
"import java.util.*;\n" +
"import java.util.stream.*;\n" +
"import static java.util.stream.Collectors.*;\n" +
"public class Test {\n" +
" public static void main(String[] args) throws IOException {\n" +
" Stream<Locale> locales = Stream.of(Locale.getAvailableLocales());\n" +
" locales = Stream.of(Locale.getAvailableLocales());\n" +
" Map<String, Set<String>> countryToLanguages = locales.collect(\n" +
" groupingBy(Locale::getDisplayCountry, \n" +
" mapping(Locale::getDisplayLanguage,\n" +
" toSet())));\n" +
" }\n" +
"}\n"});
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=459305
public void test459305() {
this.runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"import java.util.function.BiConsumer;\n" +
"import java.util.function.Consumer;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" foo(arg1 -> bar(X::baz));\n" +
" }\n" +
" private static <A1> void foo(Consumer<A1> c) { c.accept(null); }\n" +
" private static void baz(String s1, String s2) { System.out.println(s1 + \"::\" + s2); }\n" +
" private static void bar(VoidMethodRef2<String, String> mr2) { mr2.accept(\"one\", \"two\"); }\n" +
" private static interface VoidMethodRef2<A1, A2> extends BiConsumer<A1, A2>, Serializable {}\n" +
"}\n"},
"one::two");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=467825 Missing code implementation in the compiler
public void test467825() {
this.runConformTest(
new String[] {
"Main.java",
"import java.util.function.Function;\n" +
"public class Main {\n" +
" public Function<String, String> f(int x) {\n" +
" class A {\n" +
" void g() {\n" +
" System.out.println(x);\n" +
" }\n" +
" }\n" +
" return s -> {\n" +
" A a = new A();\n" +
" return s;\n" +
" };\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=467825 Missing code implementation in the compiler
public void test467825a() {
this.runConformTest(
new String[] {
"Test.java",
"import java.util.function.Function;\n" +
"interface Foo {void alpha(Bar pBar);}\n" +
"class Bar {Object bravo() {return null;}}\n" +
"class Test {\n" +
" Foo foo(Function pFunction) {\n" +
" class Baz {\n" +
" public Baz(Object pObj) {\n" +
" }\n" +
" class NestedBaz extends Baz {\n" +
" NestedBaz(Object pObj) {\n" +
" super(pObj);\n" +
" pFunction.apply(pObj);\n" +
" }\n" +
" }\n" +
" }\n" +
" return pBar -> {\n" +
" Object o = new Baz(pBar).new NestedBaz(pBar.bravo());\n" +
" };\n" +
" }\n" +
" void charlie(Object pRemovals) {}\n" +
" void delta(Foo pListener) {}\n" +
"}\n"
});
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=461004 Multiple spurious errors compiling FunctionalJava project
public void test461004() {
this.runConformTest(
new String[] {
"Ice.java",
"import java.util.function.BiPredicate;\n" +
"import java.util.function.Function;\n" +
"class Ice {\n" +
" static <T> BiPredicate<T, T> create(BiPredicate<? super T, ? super T> fn) {\n" +
" return null;\n" +
" }\n" +
" static <T, K> BiPredicate<T, T> create(Function<? super T, ? super K> map) {\n" +
" return null;\n" +
" }\n" +
" void someMethod(BiPredicate<String, String> b) {}\n" +
" void method() {\n" +
" BiPredicate<String, String> eq = String::equalsIgnoreCase;\n" +
" // these all compile:\n" +
" BiPredicate<String, String> ok1 = create( eq );\n" +
" BiPredicate<String, String> ok2 = create( (a, b) -> true );\n" +
" BiPredicate<String, String> ok3 = create( String::valueOf );\n" +
" // this causes an internal compiler error, ArrayIndexOutOfBoundsException: 1\n" +
" someMethod(create( String::equalsIgnoreCase ));\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=478533 [compiler][1.8][lambda] check visibility of target context is broken
public void test478533() {
this.runConformTest(
new String[] {
"test/BugDemonstrator.java",
"package test;\n" +
"import test.subpackage.B;\n" +
"public class BugDemonstrator {\n" +
" public static void main(String[] args) {\n" +
" // OK\n" +
" invoke(new B() {\n" +
" public String invoke(Integer input) {\n" +
" return null;\n" +
" }\n" +
" });\n" +
" // ERROR\n" +
" invoke((Integer i) -> { // Error is here: The type A<Object,Integer> from the descriptor computed for the target context is not visible here.\n" +
" return null;\n" +
" });\n" +
" }\n" +
" private static String invoke(B b) {\n" +
" return b.invoke(1);\n" +
" }\n" +
"}\n",
"test/subpackage/A.java",
"package test.subpackage;\n" +
"interface A<I> {\n" +
" String invoke(I input);\n" +
"}\n",
"test/subpackage/B.java",
"package test.subpackage;\n" +
"public interface B extends A<Integer> {}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=478533 [compiler][1.8][lambda] check visibility of target context is broken
public void test478533a() {
this.runNegativeTest(
new String[] {
"test/BugDemonstrator.java",
"package test;\n" +
"import test.subpackage.C;\n" +
"public class BugDemonstrator {\n" +
" public static void main(String[] args) {\n" +
" C c = new C();\n" +
" c.invoke((Integer i) -> { \n" +
" return null;\n" +
" }, 2);\n" +
" }\n" +
"}\n",
"test/subpackage/A.java",
"package test.subpackage;\n" +
"public interface A<I> {\n" +
" String invoke(I input);\n" +
"}\n",
"test/subpackage/B.java",
"package test.subpackage;\n" +
"interface B extends A<Integer> {}\n" ,
"test/subpackage/C.java",
"package test.subpackage;\n" +
"public class C {\n" +
" public String invoke(B b, Integer input) {\n" +
" return b.invoke(input);\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in test\\BugDemonstrator.java (at line 6)\n" +
" c.invoke((Integer i) -> { \n" +
" ^^^^^^^^^^^^^^\n" +
"The type B from the descriptor computed for the target context is not visible here. \n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=477263 [1.8][compiler] No enclosing instance of the type Outer is accessible in scope for method reference
public void test477263() {
this.runConformTest(
new String[] {
"Test.java",
"import java.util.function.Function;\n" +
"public interface Test<T> {\n" +
" static <K> void test(Function<?, ? extends K> function) {\n" +
" class Outer {\n" +
" Outer(K k) {}\n" +
" class Inner {\n" +
" public Inner(K k) {}\n" +
" private void method(K k) {\n" +
" System.out.println(function.apply(null));\n" +
" Function<K, Inner> f = Inner::new;\n" +
" Function<K, Outer> f2 = Outer::new;\n" +
" }\n" +
" }\n" +
" }\n" +
" new Outer(null).new Inner(null).method(null);\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" Test.test((k) -> \"Success\");\n" +
" }\n" +
"}"
},
"Success");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=477263 [1.8][compiler] No enclosing instance of the type Outer is accessible in scope for method reference
public void test477263a() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" void foo() {\n" +
" int local = 10;\n" +
" class Y extends X {\n" +
" class Z extends X {\n" +
" private Z(int z) {\n" +
" }\n" +
" private Z() {}\n" +
" }\n" +
" private Y(int y) {\n" +
" System.out.println(y);\n" +
" }\n" +
" Y() {\n" +
" }\n" +
" }\n" +
" I i = Y :: new;\n" +
" i.makeX(local);\n" +
" }\n" +
" private X(int x) {\n" +
" }\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().foo();\n" +
" }\n" +
"}"
},
"10");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=477263 [1.8][compiler] No enclosing instance of the type Outer is accessible in scope for method reference
public void test477263b() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" void foo() {\n" +
" int local = 10;\n" +
" class Y extends X {\n" +
" class Z extends X {\n" +
" private Z(int z) {\n" +
" System.out.println(local);\n" +
" }\n" +
" void f(int in) {\n" +
" I i2 = Z::new;\n" +
" i2.makeX(in);\n" +
" }\n" +
" private Z() {}\n" +
" }\n" +
" private Y(int y) {\n" +
" System.out.println(\"Y\");\n" +
" }\n" +
" Y() {\n" +
" }\n" +
" }\n" +
" new Y().new Z().f(0);\n" +
" }\n" +
" private X(int x) {\n" +
" System.out.println(x);\n" +
" }\n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().foo();\n" +
" }\n" +
"}"
},
"10");
}
public void testBug487586() {
runNegativeTest(
new String[] {
"X.java",
"\n" +
"interface Calculator {\n" +
" public int calculate(int a, int b);\n" +
"}\n" +
"\n" +
"interface Sumator {\n" +
" public int test();\n" +
"\n" +
" public int test3(int a, int b);\n" +
"}\n" +
"\n" +
"// intersection of both types\n" +
"interface Both extends Sumator, Calculator {\n" +
"\n" +
"}\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Calculator test = (Calculator & Sumator) (a, b) -> a + b;\n" +
" System.out.println(test.calculate(2, 3));\n" +
"\n" +
" Sumator sumator = (Calculator & Sumator) (a, b) -> a + b; // does compile, but throws an Exception\n" +
" sumator.test();\n" +
"\n" +
" Both both = (Both) (a, b) -> a + b; // does not compile\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 18)\n" +
" Calculator test = (Calculator & Sumator) (a, b) -> a + b;\n" +
" ^^^^^^^^^^^^^^^\n" +
"The target type of this expression must be a functional interface\n" +
"----------\n" +
"2. ERROR in X.java (at line 21)\n" +
" Sumator sumator = (Calculator & Sumator) (a, b) -> a + b; // does compile, but throws an Exception\n" +
" ^^^^^^^^^^^^^^^\n" +
"The target type of this expression must be a functional interface\n" +
"----------\n" +
"3. ERROR in X.java (at line 24)\n" +
" Both both = (Both) (a, b) -> a + b; // does not compile\n" +
" ^^^^^^^^^^^^^^^\n" +
"The target type of this expression must be a functional interface\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=452587 Java 8: Method references to the same method do not share BootstrapMethod
public void testBug452587() {
this.runConformTest(
new String[] {
"Test.java",
" public class Test {\n" +
" public static void main(String[] args) {\n" +
" Runnable m = Test::m;\n" +
" Runnable n = Test::m;\n" +
" Runnable o = Test::m;\n" +
" Runnable p = Test::m;\n" +
" Runnable q = Test::m;\n" +
" }\n" +
" public static void m() {}\n" +
" }\n"
});
IClassFileReader classFileReader = ToolFactory.createDefaultClassFileReader(OUTPUT_DIR + File.separator + "Test.class", IClassFileReader.ALL);
BootstrapMethodsAttribute bootstrapMethodsAttribute = null;
IClassFileAttribute[] attrs = classFileReader.getAttributes();
for (int i=0,max=attrs.length;i<max;i++) {
if (new String(attrs[i].getAttributeName()).equals("BootstrapMethods")) {
bootstrapMethodsAttribute = (BootstrapMethodsAttribute)attrs[i];
break;
}
}
assertNotNull("BootstrapMethods attribute not found", bootstrapMethodsAttribute);
int bmaLength = bootstrapMethodsAttribute.getBootstrapMethodsLength();
assertEquals("Incorrect number of bootstrap methods found", 1, bmaLength);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=485529 [1.8][compiler] Verify error with constructor reference to nested class constructor
public void testBug485529() {
this.runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" X makeX(int x);\n" +
"}\n" +
"public class X {\n" +
" class Y extends X {\n" +
" class Z extends X {\n" +
" private Z(int z) {\n" +
" }\n" +
" private Z() {}\n" +
" }\n" +
" private Y(int y) {\n" +
" }\n" +
" Y() {\n" +
" }\n" +
" }\n" +
" I i = Y :: new;\n" +
" private X(int x) {\n" +
" }\n" +
" \n" +
" X() {\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X();\n" +
" \n" +
" }\n" +
"}"
},
"");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=479284 [1.8][inference] fail to resolve matching types for lambda and method reference + NPE at build
public void testBug479284() {
runNegativeTest(
new String[] {
"BadInferenceMars451.java",
"package bug.report;\n" +
"import java.util.ArrayList;\n" +
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.Map;\n" +
"import java.util.function.BinaryOperator;\n" +
"import java.util.function.Function;\n" +
"import java.util.stream.Collectors;\n" +
"/**\n" +
" * Problem is valid on Version: Mars.1 Release (4.5.1) Build id: 20150924-1200\n" +
" */\n" +
"public class BadInferenceMars451 {\n" +
" public static Map<Object, List<X>> BadInferenceMars451Casus1() {\n" +
" List<X> stuff = new ArrayList<>();\n" +
" return stuff.stream().collect(Collectors.toMap(Function.identity(), t -> Arrays.asList(t), BadInferenceMars451::sum));\n" +
" }\n" +
" public static Map<Object, List<X>> BadInferenceMars451Casus1Fixed1() {\n" +
" List<X> stuff = new ArrayList<>();\n" +
" return stuff.stream().collect(Collectors.toMap(Function.identity(), t -> Arrays.asList(t), (BinaryOperator<List<X>>) BadInferenceMars451::sum));\n" +
" }\n" +
" public static Map<Object, List<X>> BadInferenceMars451Casus1Fixed2() {\n" +
" List<X> stuff = new ArrayList<>();\n" +
" return stuff.stream().collect(Collectors.toMap(Function.identity(), t -> Arrays.<X> asList(t), BadInferenceMars451::sum));\n" +
" }\n" +
" /* \n" +
" * Uncomment this to see eclipse crash at build\n" +
" * this doesnt work but it should not crash the ide\n" +
" */ \n" +
" public static Map<Object, List<X>> BadInferenceMars451Casus1Crash() {\n" +
" List<X> stuff = new ArrayList<>();\n" +
" return stuff.stream().collect(Collectors.toMap(Function.identity(), t -> Arrays.asList(t), BadInferenceMars451<X>::sum));\n" +
" }\n" +
" public static <T> List<T> sum(List<T> l1, List<T> l2) {\n" +
" return null;\n" +
" }\n" +
" public static class X {\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in BadInferenceMars451.java (at line 31)\n" +
" return stuff.stream().collect(Collectors.toMap(Function.identity(), t -> Arrays.asList(t), BadInferenceMars451<X>::sum));\n" +
" ^^^^^^^^^^^^^^^^^^^\n" +
"The type BadInferenceMars451 is not generic; it cannot be parameterized with arguments <BadInferenceMars451.X>\n" +
"----------\n");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=491139 Lambda that redefines a default method with generics
public void testBug491139() {
this.runConformTest(
new String[] {
"Test.java",
"public class Test {\n" +
" interface Foo<T> {\n" +
" default String bar(String s) {\n" +
" return (\"default : \" + s);\n" +
" }\n" +
" String bar(T t);\n" +
" }\n" +
" public String testLambdaRedefiningADefault() {\n" +
" Foo<String> foo =\n" +
" (t) -> {\n" +
" return \"lambda : \" + t;\n" +
" };\n" +
" return (((Foo)foo).bar(\"String\"));\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" System.out.println(new Test().testLambdaRedefiningADefault());\n" +
" }\n" +
"}\n"
},
"lambda : String");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=489631 [1.8] "java.lang.VerifyError: Bad type on operand stack" with lamba and type defined in method
public void test489631() {
this.runConformTest(
new String[] {
"Test.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"interface I { int getLength(); }\n" +
"public class Test {\n" +
" public void test() {\n" +
" class A<T> {\n" +
" List<T> l;\n" +
" public A(List<T> l) {\n" +
" this.l = l;\n" +
" }\n" +
" }\n" +
" List<Integer> list = new ArrayList<>();\n" +
" I i = () -> new A<>(list).l.size();\n" +
" System.out.println(i.getLength());\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new Test().test();\n" +
" }\n" +
"}"
},
"0");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=489631 [1.8] "java.lang.VerifyError: Bad type on operand stack" with lamba and type defined in method
public void test489631a() {
this.runConformTest(
new String[] {
"Test.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"interface I { int getLength(); }\n" +
"public class Test {\n" +
" public void test() {\n" +
" class A<T> {\n" +
" List<T> l;\n" +
" public A(List<T> l) {\n" +
" this.l = l;\n" +
" }\n" +
" class B {\n" +
" List<Integer> iL;\n" +
" public B(List<Integer> l) {\n" +
" // super(l);\n" +
" this.iL = l;\n" +
" }\n" +
" }\n" +
" }\n" +
" List<Integer> list = new ArrayList<>();\n" +
" I i = () -> new A<>(list).new B(list).iL.size();\n" +
" System.out.println(i.getLength());\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new Test().test();\n" +
" }\n" +
"}"
},
"0");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=476859 enclosing method not found error when EJC compiled, works fine with oracle jdk compiler
public void test476859() {
this.runConformTest(
new String[] {
"Test.java",
"import java.lang.reflect.Method;\n" +
"import java.util.function.Function;\n" +
"public class Test {\n" +
" public static void main(String[] args) {\n" +
" final Function<Void,Method> f = __ -> {\n" +
" class Dummy{}\n" +
" return new Dummy(){}.getClass().getEnclosingMethod();\n" +
" };\n" +
" System.out.println(f.apply(null));\n" +
" }\n" +
"}"
},
"private static java.lang.reflect.Method Test.lambda$0(java.lang.Void)");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=476859 enclosing method not found error when EJC compiled, works fine with oracle jdk compiler
public void test476859a() {
this.runConformTest(
new String[] {
"Test.java",
"import java.lang.reflect.Method;\n" +
"import java.util.function.Function;\n" +
"public class Test {\n" +
" public static void main(String[] args) {\n" +
" \n" +
" final Function<Void,Method> f = __ -> {\n" +
" class Dummy{}\n" +
" return new Dummy(){}.getClass().getEnclosingMethod();\n" +
" };\n" +
" System.out.println(f.apply(null));\n" +
" new AnotherClass().foo();\n" +
" }\n" +
"}\n" +
"class AnotherClass {\n" +
" void foo() {\n" +
" final Function<Void,Method> f = __ -> {\n" +
" class Dummy{}\n" +
" return new Dummy(){}.getClass().getEnclosingMethod();\n" +
" };\n" +
" System.out.println(f.apply(null));\n" +
" }\n" +
"}\n"
},
"private static java.lang.reflect.Method Test.lambda$0(java.lang.Void)\n" +
"private java.lang.reflect.Method AnotherClass.lambda$0(java.lang.Void)");
}
public void testBug499258() {
runConformTest(
new String[] {
"bug499258/ShellTab.java",
"package bug499258;\n" +
"class Controller {\n" +
" public void newTerminal(Object... path) {\n" +
" }\n" +
"}\n" +
"\n" +
"interface EventHandler {\n" +
" void handle();\n" +
"}\n" +
"\n" +
"public class ShellTab {\n" +
" private final Controller controller;\n" +
"\n" +
" public ShellTab(Controller controller) {\n" +
" this.controller = controller;\n" +
" EventHandler h = this.controller::newTerminal;\n" +
" }\n" +
"}\n" +
"",
}
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=500374 Using a method reference to a generic method in a Base class gives me NoSuchMethodError
public void test500374() {
this.runConformTest(
new String[] {
"client/Client.java",
"package client;\n" +
"import lib.Sub;\n" +
"public class Client {\n" +
" public static void main(String[] args) throws Throwable {\n" +
" Sub s1 = new Sub();\n" +
" doSomething(() -> s1.m());\n" +
" doSomething(s1::m);\n" +
" }\n" +
" interface Aaa {\n" +
" Object f() throws Throwable;\n" +
" }\n" +
" public static void doSomething(Aaa a) throws Throwable {\n" +
" System.out.println(\"Done\");\n" +
" }\n" +
"}\n",
"lib/Sub.java",
"package lib;\n" +
"public class Sub extends Base<Sub> {}",
"lib/Base.java",
"package lib;\n" +
"class Base<T> {\n" +
" public T m() {\n" +
" System.out.println(\"m\");\n" +
" return thisInstance();\n" +
" }\n" +
" @SuppressWarnings(\"unchecked\")\n" +
" T thisInstance() {\n" +
" return (T) this;\n" +
" }\n" +
"}"
},
"Done\n" +
"Done");
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=500374 Using a method reference to a generic method in a Base class gives me NoSuchMethodError
public void test500374a() {
this.runConformTest(
new String[] {
"client/Client.java",
"package client;\n" +
"import java.lang.invoke.MethodHandle;\n" +
"import java.lang.invoke.MethodHandles;\n" +
"import java.lang.invoke.MethodType;\n" +
"import lib.Sub;\n" +
"public class Client {\n" +
" public static void main(String[] args) throws Throwable {\n" +
" MethodHandle mh = MethodHandles.lookup().findVirtual(Sub.class, \"m\", MethodType.methodType(Object.class));\n" +
" doSomething(mh::invoke);\n" +
" }\n" +
" interface Aaa {\n" +
" Object f() throws Throwable;\n" +
" }\n" +
" public static void doSomething(Aaa a) throws Throwable {\n" +
" System.out.println(\"Done\");\n" +
" }\n" +
"}\n",
"lib/Sub.java",
"package lib;\n" +
"public class Sub extends Base<Sub> {}",
"lib/Base.java",
"package lib;\n" +
"class Base<T> {\n" +
" public T m() {\n" +
" System.out.println(\"m\");\n" +
" return thisInstance();\n" +
" }\n" +
" @SuppressWarnings(\"unchecked\")\n" +
" T thisInstance() {\n" +
" return (T) this;\n" +
" }\n" +
"}"
},
"Done");
}
public void testBug502871() {
runNegativeTest(
new String[] {
"test/GryoMapper.java",
"package test;\n" +
"\n" +
"interface Generic<A> {\n" +
"}\n" +
"\n" +
"interface SAM<B> {\n" +
" B m();\n" +
"}\n" +
"\n" +
"public final class GryoMapper {\n" +
" public void addCustom(Generic c) {\n" +
" addOrOverrideRegistration(() -> GryoTypeReg.of(c));\n" +
" }\n" +
"\n" +
" private <C> void addOrOverrideRegistration(SAM<GryoTypeReg<C>> newRegistrationBuilder) {\n" +
" }\n" +
"\n" +
" static class GryoTypeReg<D> {\n" +
" static <E> GryoTypeReg<E> of(Generic<E> clazz) {\n" +
" return null;\n" +
" }\n" +
" }\n" +
"}\n" +
"",
},
"----------\n" +
"1. WARNING in test\\GryoMapper.java (at line 11)\n" +
" public void addCustom(Generic c) {\n" +
" ^^^^^^^\n" +
"Generic is a raw type. References to generic type Generic<A> should be parameterized\n" +
"----------\n" +
"2. WARNING in test\\GryoMapper.java (at line 12)\n" +
" addOrOverrideRegistration(() -> GryoTypeReg.of(c));\n" +
" ^^^^^^^^^^^^^^^^^\n" +
"Type safety: Unchecked invocation of(Generic) of the generic method of(Generic<E>) of type GryoMapper.GryoTypeReg\n" +
"----------\n" +
"3. WARNING in test\\GryoMapper.java (at line 12)\n" +
" addOrOverrideRegistration(() -> GryoTypeReg.of(c));\n" +
" ^^^^^^^^^^^^^^^^^\n" +
"Type safety: The expression of type GryoMapper.GryoTypeReg needs unchecked conversion to conform to GryoMapper.GryoTypeReg<Object>\n" +
"----------\n" +
"4. WARNING in test\\GryoMapper.java (at line 12)\n" +
" addOrOverrideRegistration(() -> GryoTypeReg.of(c));\n" +
" ^\n" +
"Type safety: The expression of type Generic needs unchecked conversion to conform to Generic<Object>\n" +
"----------\n"
);
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=490469 Internal compiler error: java.lang.NullPointerException at org.eclipse.jdt.internal.compiler.ast.LambdaExpression.analyseCode(LambdaExpression.java:512)
public void testBUg490469() {
this.runConformTest(
new String[] {
"AbstractClientProxy.java",
"import java.util.function.Supplier;\n" +
"public abstract class AbstractClientProxy {\n" +
" protected <T> T getRemoteObject(String url, Class<T> responseType, Object... urlVariables) {\n" +
" return handleException(this.bindGet(REST::getForObject, url, responseType, urlVariables));\n" +
" }\n" +
" private <T> T handleException(Supplier<T> s){\n" +
" T t = null;\n" +
" try{\n" +
" t= s.get();\n" +
" }catch(Exception e){\n" +
" }\n" +
" return t;\n" +
" }\n" +
" private <T> Supplier<T> bindGet(GetFunc fn, String url, Class<T> responseType, Object... uriVariables) {\n" +
" return () -> fn.invoke(url, responseType, uriVariables);\n" +
" }\n" +
"}\n" +
"class REST {\n" +
" static <T> T getForObject(String url, Class<T> respType, Object... vars) {\n" +
" return null;\n" +
" }\n" +
"}\n" +
"interface GetFunc {\n" +
" <T> T invoke(String url, Class<T> responseType, Object... uriVariables);\n" +
"}\n"
});
}
public static Class testClass() {
return LambdaExpressionsTest.class;
}
}