Summary

Methods to handle module pseudo-types are added to the TypeKind family of concrete visitors in javax.lang.model.util.

Problem

The TypeKind visitors as of JDK 9 omitted support for the module pseudo-type. This support should have been added in the same release as modules.

Solution

Add the methods in question, TypeKindVisitor6.visitNoTypeAsModule which calls visitUnknown and TypeKindVisitor9.visitNoTypeAsModule which calls defaultAction.

Specification

diff -r 5cc5b8270cad src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor6.java
--- a/src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor6.java   Mon Nov 20 20:33:51 2017 -0800
+++ b/src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor6.java   Mon Nov 20 22:06:30 2017 -0800
@@ -257,7 +257,7 @@
      *
      * @implSpec This implementation dispatches to the visit method for
      * the specific {@linkplain TypeKind kind} of pseudo-type:
-     * {@code VOID}, {@code PACKAGE}, or {@code NONE}.
+     * {@code VOID}, {@code PACKAGE}, {@code MODULE}, or {@code NONE}.
      *
      * @param t {@inheritDoc}
      * @param p {@inheritDoc}
@@ -273,6 +273,9 @@
         case PACKAGE:
             return visitNoTypeAsPackage(t, p);

+        case MODULE:
+            return visitNoTypeAsModule(t, p);
+
         case NONE:
             return visitNoTypeAsNone(t, p);

@@ -308,6 +311,21 @@
     }

     /**
+     * Visits a {@link TypeKind#MODULE MODULE} pseudo-type.
+     *
+     * @implSpec This implementation calls {@code visitUnknown}.
+     *
+     * @param t the type to visit
+     * @param p a visitor-specified parameter
+     * @return  the result of {@code visitUnknown}
+     *
+     * @since 10
+     */
+    public R visitNoTypeAsModule(NoType t, P p) {
+        return visitUnknown(t, p);
+    }
+
+    /**
      * Visits a {@link TypeKind#NONE NONE} pseudo-type.
      *
      * @implSpec This implementation calls {@code defaultAction}.

diff -r 5cc5b8270cad src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor9.java
--- a/src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor9.java   Mon Nov 20 20:33:51 2017 -0800
+++ b/src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor9.java   Mon Nov 20 22:06:30 2017 -0800
@@ -93,4 +93,20 @@
     protected TypeKindVisitor9(R defaultValue) {
         super(defaultValue);
     }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @implSpec This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     *
+     * @since 10
+     */
+    @Override
+    public R visitNoTypeAsModule(NoType t, P p) {
+        return defaultAction(t, p);
+    }
 }