Maurizio Cimadamore e5ce4a752b 6840638: Project Coin: Improved Type Inference for Generic Instance Creation (aka 'diamond')
Diamond operator implementation (simple approach)

Reviewed-by: jjg
2009-08-27 13:40:48 +01:00

84 lines
4.1 KiB
Java

/*
* @test /nodynamiccopyright/
* @bug 6840638
*
* @summary Project Coin: Improved Type Inference for Generic Instance Creation (aka 'diamond')
* @author mcimadamore
* @compile/fail/ref=Neg03.out Neg03.java -source 1.7 -XDrawDiagnostics
*
*/
class Neg03<U> {
class Foo<V extends Number> {
Foo(V x) {}
<Z> Foo(V x, Z z) {}
}
void testSimple() {
Foo<String> f1 = new Foo<>(""); //new Foo<Integer> created
Foo<? extends String> f2 = new Foo<>(""); //new Foo<Integer> created
Foo<?> f3 = new Foo<>(""); //new Foo<Object> created
Foo<? super String> f4 = new Foo<>(""); //new Foo<Object> created
Foo<String> f5 = new Foo<>(""){}; //new Foo<Integer> created
Foo<? extends String> f6 = new Foo<>(""){}; //new Foo<Integer> created
Foo<?> f7 = new Foo<>(""){}; //new Foo<Object> created
Foo<? super String> f8 = new Foo<>(""){}; //new Foo<Object> created
Foo<String> f9 = new Foo<>("", ""); //new Foo<Integer> created
Foo<? extends String> f10 = new Foo<>("", ""); //new Foo<Integer> created
Foo<?> f11 = new Foo<>("", ""); //new Foo<Object> created
Foo<? super String> f12 = new Foo<>("", ""); //new Foo<Object> created
Foo<String> f13 = new Foo<>("", ""){}; //new Foo<Integer> created
Foo<? extends String> f14 = new Foo<>("", ""){}; //new Foo<Integer> created
Foo<?> f15 = new Foo<>("", ""){}; //new Foo<Object> created
Foo<? super String> f16 = new Foo<>("", ""){}; //new Foo<Object> created
}
void testQualified_1() {
Foo<String> f1 = new Neg03<U>.Foo<>(""); //new Foo<Integer> created
Foo<? extends String> f2 = new Neg03<U>.Foo<>(""); //new Foo<Integer> created
Foo<?> f3 = new Neg03<U>.Foo<>(""); //new Foo<Object> created
Foo<? super String> f4 = new Neg03<U>.Foo<>(""); //new Foo<Object> created
Foo<String> f5 = new Neg03<U>.Foo<>(""){}; //new Foo<Integer> created
Foo<? extends String> f6 = new Neg03<U>.Foo<>(""){}; //new Foo<Integer> created
Foo<?> f7 = new Neg03<U>.Foo<>(""){}; //new Foo<Object> created
Foo<? super String> f8 = new Neg03<U>.Foo<>(""){}; //new Foo<Object> created
Foo<String> f9 = new Neg03<U>.Foo<>("", ""); //new Foo<Integer> created
Foo<? extends String> f10 = new Neg03<U>.Foo<>("", ""); //new Foo<Integer> created
Foo<?> f11 = new Neg03<U>.Foo<>("", ""); //new Foo<Object> created
Foo<? super String> f12 = new Neg03<U>.Foo<>("", ""); //new Foo<Object> created
Foo<String> f13 = new Neg03<U>.Foo<>("", ""){}; //new Foo<Integer> created
Foo<? extends String> f14 = new Neg03<U>.Foo<>("", ""){}; //new Foo<Integer> created
Foo<?> f15 = new Neg03<U>.Foo<>("", ""){}; //new Foo<Object> created
Foo<? super String> f16 = new Neg03<U>.Foo<>("", ""){}; //new Foo<Object> created
}
void testQualified_2(Neg03<U> n) {
Foo<String> f1 = n.new Foo<>(""); //new Foo<Integer> created
Foo<? extends String> f2 = n.new Foo<>(""); //new Foo<Integer> created
Foo<?> f3 = n.new Foo<>(""); //new Foo<Integer> created
Foo<? super String> f4 = n.new Foo<>(""); //new Foo<Integer> created
Foo<String> f5 = n.new Foo<>(""){}; //new Foo<Integer> created
Foo<? extends String> f6 = n.new Foo<>(""){}; //new Foo<Integer> created
Foo<?> f7 = n.new Foo<>(""){}; //new Foo<Integer> created
Foo<? super String> f8 = n.new Foo<>(""){}; //new Foo<Integer> created
Foo<String> f9 = n.new Foo<>("", ""); //new Foo<Integer> created
Foo<? extends String> f10 = n.new Foo<>("", ""); //new Foo<Integer> created
Foo<?> f11 = n.new Foo<>("", ""); //new Foo<Integer> created
Foo<? super String> f12 = n.new Foo<>("", ""); //new Foo<Integer> created
Foo<String> f13 = n.new Foo<>("", ""){}; //new Foo<Integer> created
Foo<? extends String> f14 = n.new Foo<>("", ""){}; //new Foo<Integer> created
Foo<?> f15 = n.new Foo<>("", ""){}; //new Foo<Integer> created
Foo<? super String> f16 = n.new Foo<>("", ""){}; //new Foo<Integer> created
}
}