8008540: Constructor reference to non-reifiable array should be rejected

8008539: Spurious error when constructor reference mention an interface type
8008538: Constructor reference accepts wildcard parameterized types
Summary: Overhaul of Check.checkConstructorRefType
Reviewed-by: jjg

src/share/classes/com/sun/tools/javac/comp/Check.java

@@ -670,11 +670,18 @@ public class Check {
         t = checkClassOrArrayType(pos, t);
         if (t.hasTag(CLASS)) {
             if ((t.tsym.flags() & (ABSTRACT | INTERFACE)) != 0) {
-                log.error(pos, "abstract.cant.be.instantiated");
+                log.error(pos, "abstract.cant.be.instantiated", t.tsym);
                 t = types.createErrorType(t);
             } else if ((t.tsym.flags() & ENUM) != 0) {
                 log.error(pos, "enum.cant.be.instantiated");
                 t = types.createErrorType(t);
+            } else {
+                t = checkClassType(pos, t, true);
+            }
+        } else if (t.hasTag(ARRAY)) {
+            if (!types.isReifiable(((ArrayType)t).elemtype)) {
+                log.error(pos, "generic.array.creation");
+                t = types.createErrorType(t);
             }
         }
         return t;

test/tools/javac/lambda/MethodReference38.out

-MethodReference38.java:24:18: compiler.err.abstract.cant.be.instantiated
-MethodReference38.java:25:18: compiler.err.abstract.cant.be.instantiated
-MethodReference38.java:26:18: compiler.err.abstract.cant.be.instantiated
+MethodReference38.java:24:18: compiler.err.abstract.cant.be.instantiated: MethodReference38.A
+MethodReference38.java:25:18: compiler.err.abstract.cant.be.instantiated: MethodReference38.I
+MethodReference38.java:26:18: compiler.err.abstract.cant.be.instantiated: MethodReference38.AC
 MethodReference38.java:27:18: compiler.err.enum.cant.be.instantiated
 4 errors

test/tools/javac/lambda/MethodReference64.java

+/*
+ * @test /nodynamiccopyright/
+ * @bug 8008540 8008539 8008538
+ * @summary Constructor reference to non-reifiable array should be rejected
+ * @compile/fail/ref=MethodReference64.out -XDrawDiagnostics MethodReference64.java
+ */
+class MethodReference64 {
+    interface ClassFactory {
+        Object m();
+    }
+
+    interface ArrayFactory {
+        Object m(int i);
+    }
+
+    @interface Anno { }
+
+    enum E { }
+
+    interface I { }
+
+    static class Foo<X> { }
+
+    void m(ClassFactory cf) { }
+    void m(ArrayFactory cf) { }
+
+    void testAssign() {
+        ClassFactory c1 = Anno::new; //error
+        ClassFactory c2 = E::new; //error
+        ClassFactory c3 = I::new; //error
+        ClassFactory c4 = Foo<?>::new; //error
+        ClassFactory c5 = 1::new; //error
+        ArrayFactory a1 = Foo<?>[]::new; //ok
+        ArrayFactory a2 = Foo<? extends String>[]::new; //error
+    }
+
+    void testMethod() {
+        m(Anno::new); //error
+        m(E::new); //error
+        m(I::new); //error
+        m(Foo<?>::new); //error
+        m(1::new); //error
+        m(Foo<?>[]::new); //ok - resolves to m(ArrayFactory)
+        m(Foo<? extends String>[]::new); //error
+    }
+}

test/tools/javac/lambda/MethodReference64.out

+MethodReference64.java:28:27: compiler.err.abstract.cant.be.instantiated: MethodReference64.Anno
+MethodReference64.java:29:27: compiler.err.enum.cant.be.instantiated
+MethodReference64.java:30:27: compiler.err.abstract.cant.be.instantiated: MethodReference64.I
+MethodReference64.java:31:30: compiler.err.type.found.req: ?, (compiler.misc.type.req.exact)
+MethodReference64.java:32:27: compiler.err.unexpected.type: kindname.class, kindname.value
+MethodReference64.java:34:48: compiler.err.generic.array.creation
+MethodReference64.java:38:11: compiler.err.abstract.cant.be.instantiated: MethodReference64.Anno
+MethodReference64.java:39:11: compiler.err.enum.cant.be.instantiated
+MethodReference64.java:40:11: compiler.err.abstract.cant.be.instantiated: MethodReference64.I
+MethodReference64.java:41:14: compiler.err.type.found.req: ?, (compiler.misc.type.req.exact)
+MethodReference64.java:42:11: compiler.err.unexpected.type: kindname.class, kindname.value
+MethodReference64.java:44:32: compiler.err.generic.array.creation
+12 errors