diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/REngine.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/REngine.java
index 4c03ebeafe358d7a88cc8456ae5ee198783faad7..f9d21ecd3a9dc533972e9c087e4162ae94e7b2d8 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/REngine.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/REngine.java
@@ -211,7 +211,7 @@ final class REngine implements Engine, Engine.Timings {
private void initializeRNG() {
assert REnvironment.globalEnv() != null;
RFunction fun = context.lookupBuiltin(".fastr.set.seed");
- ActiveBinding dotRandomSeed = new ActiveBinding(RType.Any, fun);
+ ActiveBinding dotRandomSeed = new ActiveBinding(RType.Any, fun, true);
Frame frame = REnvironment.globalEnv().getFrame();
FrameSlot slot = FrameSlotChangeMonitor.findOrAddFrameSlot(frame.getFrameDescriptor(), RRNG.RANDOM_SEED, FrameSlotKind.Object);
FrameSlotChangeMonitor.setActiveBinding(frame, slot, dotRandomSeed, false, null);
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Exists.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Exists.java
index dff9b6e0bb8da65744281da0c509d8ed8eddb473..a9587d4adb404890d47900fd7de103f872458314 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Exists.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Exists.java
@@ -69,14 +69,14 @@ public abstract class Exists extends RBuiltinNode.Arg4 {
if (modeType != RType.Any && obj instanceof RPromise) {
obj = PromiseHelperNode.evaluateSlowPath((RPromise) obj);
}
- return RRuntime.asLogical(obj != null && obj != RMissing.instance && RRuntime.checkType(obj, modeType));
+ return RRuntime.asLogical(obj != null && RRuntime.checkType(obj, modeType));
}
for (REnvironment e = env; e != REnvironment.emptyEnv(); e = e.getParent()) {
Object obj = e.get(name);
if (modeType != RType.Any && obj instanceof RPromise) {
obj = PromiseHelperNode.evaluateSlowPath((RPromise) obj);
}
- if (obj != null && obj != RMissing.instance && RRuntime.checkType(obj, modeType)) {
+ if (obj != null && RRuntime.checkType(obj, modeType)) {
return RRuntime.LOGICAL_TRUE;
}
}
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/RNGFunctions.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/RNGFunctions.java
index b1d788fb5c56c67eeaeaaafd87a24c66a9b081ea..3696abf51c09e7cbbd136b37bda36fa572e619aa 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/RNGFunctions.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/RNGFunctions.java
@@ -151,7 +151,9 @@ public class RNGFunctions {
int[] seedsArr = (int[]) seeds;
return RDataFactory.createIntVector(seedsArr, RDataFactory.INCOMPLETE_VECTOR);
}
- assert seeds != null;
+ if (seeds == null) {
+ return RNull.instance;
+ }
return seeds;
}
}
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/ActiveBinding.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/ActiveBinding.java
index 2fda68c09347c0694ba0396078276920e2dae205..2e3c44306979aebc11d7243cec649610d41af79e 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/ActiveBinding.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/ActiveBinding.java
@@ -39,10 +39,17 @@ public class ActiveBinding implements RTruffleObject {
private final RType expectedType;
private final RFunction function;
+ private boolean initialized = false;
+ private boolean hidden = false;
- public ActiveBinding(RType expectedType, RFunction fun) {
+ public ActiveBinding(RType expectedType, RFunction fun, boolean hidden) {
this.expectedType = Objects.requireNonNull(expectedType);
this.function = Objects.requireNonNull(fun);
+ this.hidden = hidden;
+ }
+
+ public ActiveBinding(RType expectedType, RFunction fun) {
+ this(expectedType, fun, false);
}
public RFunction getFunction() {
@@ -62,11 +69,29 @@ public class ActiveBinding implements RTruffleObject {
return "active binding";
}
+ public boolean isHidden() {
+ return hidden;
+ }
+
+ public boolean isInitialized() {
+ return initialized;
+ }
+
public Object writeValue(Object value) {
- return RContext.getEngine().evalFunction(function, REnvironment.baseEnv().getFrame(), RCaller.createInvalid(null), true, null, value);
+ Object result = RContext.getEngine().evalFunction(function, REnvironment.baseEnv().getFrame(), RCaller.createInvalid(null), true, null, value);
+ initialized = true;
+ return result;
}
public Object readValue() {
return RContext.getEngine().evalFunction(function, REnvironment.baseEnv().getFrame(), RCaller.createInvalid(null), true, null);
}
+
+ public static boolean isListed(Object value) {
+ if (isActiveBinding(value)) {
+ ActiveBinding binding = (ActiveBinding) value;
+ return !binding.hidden || binding.initialized;
+ }
+ return true;
+ }
}
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/REnvTruffleFrameAccess.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/REnvTruffleFrameAccess.java
index d6d1b687c96a339e268f9952692ea4f5074d3143..5e0167b6bb22711ae5f1f6023326b8a20a4ab487 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/REnvTruffleFrameAccess.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/env/frame/REnvTruffleFrameAccess.java
@@ -39,6 +39,7 @@ import com.oracle.truffle.r.runtime.RError;
import com.oracle.truffle.r.runtime.RError.Message;
import com.oracle.truffle.r.runtime.RRuntime;
import com.oracle.truffle.r.runtime.data.RDataFactory;
+import com.oracle.truffle.r.runtime.data.RMissing;
import com.oracle.truffle.r.runtime.data.RStringVector;
import com.oracle.truffle.r.runtime.env.REnvironment;
import com.oracle.truffle.r.runtime.env.REnvironment.PutException;
@@ -75,7 +76,10 @@ public final class REnvTruffleFrameAccess extends REnvFrameAccess {
Object value = FrameSlotChangeMonitor.getValue(slot, frame);
// special treatment for active binding: call bound function
if (ActiveBinding.isActiveBinding(value)) {
- return ((ActiveBinding) value).readValue();
+ Object readValue = ((ActiveBinding) value).readValue();
+ // special case: if the active binding returns RMissing, then this should behave
+ // like the variable does not exist.
+ return readValue != RMissing.instance ? readValue : null;
}
return value;
}
@@ -161,7 +165,8 @@ public final class REnvTruffleFrameAccess extends REnvFrameAccess {
for (int i = 0; i < names.length; i++) {
String name = names[i];
FrameSlot frameSlot = fd.findFrameSlot(name);
- if (FrameSlotChangeMonitor.getValue(frameSlot, frame) == null) {
+ Object value = FrameSlotChangeMonitor.getValue(frameSlot, frame);
+ if (value == null || !ActiveBinding.isListed(value)) {
continue;
}
if (REnvironment.includeName(name, allNames, pattern)) {