Set internal generic dispatch for the lengths builtin

Author: steve-s

CHANGELOG.md

@@ -1,3 +1,16 @@
+# 20.3.0
+
+Bug fixes:
+
+* Set internal generic dispatch for the lengths builtin, #164
+
+New features:
+
+* preliminary implementation of the ALTREP framework
+  * support for registering custom ALTREP classes
+  * ALTREP specific C API, e.g., `INTEGER_IS_SORTED`
+  * serialization and deserialization of custom ALTREP objects is not supported yet
+
 # 20.2.0
 
 Bug fixes:

com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Lengths.java

@@ -36,14 +36,15 @@
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.r.nodes.builtin.RBuiltinNode;
 import com.oracle.truffle.r.nodes.control.RLengthNode;
+import com.oracle.truffle.r.runtime.RDispatch;
 import com.oracle.truffle.r.runtime.builtins.RBuiltin;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RIntVector;
 import com.oracle.truffle.r.runtime.data.RList;
 import com.oracle.truffle.r.runtime.data.RNull;
 import com.oracle.truffle.r.runtime.data.model.RAbstractVector;
 
-@RBuiltin(name = "lengths", kind = INTERNAL, parameterNames = {"x", "use.names"}, behavior = PURE)
+@RBuiltin(name = "lengths", kind = INTERNAL, dispatch = RDispatch.INTERNAL_GENERIC, parameterNames = {"x", "use.names"}, behavior = PURE)
 public abstract class Lengths extends RBuiltinNode.Arg2 {
 
     @Child private RLengthNode lengthNode;