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method refs: infer from functional interface return types

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This commit is contained in:
anna
2012-10-05 10:37:45 +02:00
parent 4eeaeb4f2f
commit 9488b020db
4 changed files with 199 additions and 39 deletions
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83
java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/InferenceFromReturnType.java Normal file
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@@ -0,0 +1,83 @@
class MyTestDefaultConstructor {
static class SuperFoo<<warning descr="Type parameter 'X' is never used">X</warning>> { }
static class Foo<X extends Number> extends SuperFoo<X> {
}
interface I1 {
SuperFoo<String> _();
}
interface I2 {
SuperFoo<Integer> _();
}
interface I3 {
SuperFoo<Object> _();
}
private static void <warning descr="Private method 'foo(MyTestDefaultConstructor.I1)' is never used">foo</warning>(I1 i) {System.out.println(i);}
private static void foo(I2 i) {System.out.println(i);}
private static void <warning descr="Private method 'foo(MyTestDefaultConstructor.I3)' is never used">foo</warning>(I3 i) {System.out.println(i);}
static {
foo(Foo::new);
}
}
class MyTestConstructor {
static class SuperFoo<<warning descr="Type parameter 'X' is never used">X</warning>> { }
static class Foo<X extends Number> extends SuperFoo<X> {
Foo(){}
}
interface I1 {
SuperFoo<String> _();
}
interface I2 {
SuperFoo<Integer> _();
}
interface I3 {
SuperFoo<Object> _();
}
private static void <warning descr="Private method 'foo(MyTestConstructor.I1)' is never used">foo</warning>(I1 i) {System.out.println(i);}
private static void foo(I2 i) {System.out.println(i);}
private static void <warning descr="Private method 'foo(MyTestConstructor.I3)' is never used">foo</warning>(I3 i) {System.out.println(i);}
static {
foo(Foo::new);
}
}
class MyTestMethod {
static class SuperFoo<<warning descr="Type parameter 'X' is never used">X</warning>> { }
static class Foo<X extends Number> extends SuperFoo<X> {
}
interface I1 {
SuperFoo<String> _();
}
interface I2 {
SuperFoo<Integer> _();
}
interface I3 {
SuperFoo<Object> _();
}
static <X extends Number> Foo<X> m() { return null; }
private static void <warning descr="Private method 'foo(MyTestMethod.I1)' is never used">foo</warning>(I1 i) {System.out.println(i);}
private static void foo(I2 i) {System.out.println(i);}
private static void <warning descr="Private method 'foo(MyTestMethod.I3)' is never used">foo</warning>(I3 i) {System.out.println(i);}
static {
foo(MyTestMethod::m);
}
}