Expression update contains full multi-value info

docs/language-server/protocol-language-server.md

@@ -376,6 +376,10 @@ interface ExpressionUpdate {
    *  - array with multiple values represents an intersetion type
    */
   type: string[];
+  /**
+   * The list of types this expression can be converted to.
+   */
+  hiddenType: string[];
   /** The updated method call info. */
   methodCall?: MethodCall;
   /** Profiling information about the expression. */

engine/language-server/src/main/scala/org/enso/languageserver/runtime/ContextEventsListener.scala

@@ -200,7 +200,8 @@ final class ContextEventsListener(
     val computedExpressions = expressionUpdates.map { update =>
       ContextRegistryProtocol.ExpressionUpdate(
         update.expressionId,
-        update.expressionTypes.getOrElse(Vector()),
+        update.expressionType.map(_.visibleType).getOrElse(Vector()),
+        update.expressionType.map(_.hiddenType).getOrElse(Vector()),
         update.methodCall.map(toProtocolMethodCall),
         update.profilingInfo.map(toProtocolProfilingInfo),
         update.fromCache,

engine/language-server/src/main/scala/org/enso/languageserver/runtime/ContextRegistryProtocol.scala

@@ -177,6 +177,7 @@ object ContextRegistryProtocol {
     *
     * @param expressionId the id of updated expression
     * @param type the updated type of expression
+    * @param hiddenType the list of types this expression can be converted to
     * @param methodCall the updated method call
     * @param profilingInfo profiling information about the expression
     * @param fromCache whether the expression's value came from the cache
@@ -185,6 +186,7 @@ object ContextRegistryProtocol {
   case class ExpressionUpdate(
     expressionId: UUID,
     `type`: Vector[String],
+    hiddenType: Vector[String],
     methodCall: Option[MethodCall],
     profilingInfo: Vector[ProfilingInfo],
     fromCache: Boolean,

engine/language-server/src/test/scala/org/enso/languageserver/runtime/ContextEventsListenerSpec.scala

@@ -64,7 +64,12 @@ class ContextEventsListenerSpec
           Set(
             Api.ExpressionUpdate(
               Suggestions.method.externalId.get,
-              Some(Vector(Suggestions.method.returnType)),
+              Some(
+                Api.ExpressionType(
+                  Vector(Suggestions.method.returnType),
+                  Vector(Suggestions.method.selfType)
+                )
+              ),
               Some(methodCall),
               Vector(),
               false,
@@ -87,6 +92,7 @@ class ContextEventsListenerSpec
                 ContextRegistryProtocol.ExpressionUpdate(
                   Suggestions.method.externalId.get,
                   Vector(Suggestions.method.returnType),
+                  Vector(Suggestions.method.selfType),
                   Some(toProtocolMethodCall(methodCall)),
                   Vector(),
                   false,
@@ -136,6 +142,7 @@ class ContextEventsListenerSpec
                 ContextRegistryProtocol.ExpressionUpdate(
                   Suggestions.method.externalId.get,
                   Vector(),
+                  Vector(),
                   None,
                   Vector(),
                   false,
@@ -174,6 +181,7 @@ class ContextEventsListenerSpec
                 ContextRegistryProtocol.ExpressionUpdate(
                   Suggestions.method.externalId.get,
                   Vector(),
+                  Vector(),
                   None,
                   Vector(),
                   false,
@@ -230,6 +238,7 @@ class ContextEventsListenerSpec
               ContextRegistryProtocol.ExpressionUpdate(
                 Suggestions.method.externalId.get,
                 Vector(),
+                Vector(),
                 None,
                 Vector(),
                 false,
@@ -239,6 +248,7 @@ class ContextEventsListenerSpec
               ContextRegistryProtocol.ExpressionUpdate(
                 Suggestions.local.externalId.get,
                 Vector(),
+                Vector(),
                 None,
                 Vector(),
                 false,

engine/polyglot-api/src/main/scala/org/enso/polyglot/runtime/Runtime.scala

@@ -73,6 +73,16 @@ object Runtime {
       notAppliedArguments: Vector[Int]
     )
 
+    /** The type of the expression.
+      *
+      * @param visibleType the public type of the expression visible to the user
+      * @param hiddenType the list of types this expression can be converted to
+      */
+    case class ExpressionType(
+      visibleType: Vector[String],
+      hiddenType: Vector[String]
+    )
+
     /** A representation of an executable position in code.
       */
     sealed trait StackItem
@@ -108,7 +118,7 @@ object Runtime {
     /** An update about the computed expression.
       *
       * @param expressionId the expression id
-      * @param expressionTypes the type of expression
+      * @param expressionType the type of expression
       * @param methodCall the underlying method call of this expression
       * @param profilingInfo profiling information about the execution of this expression
       * @param fromCache whether the value for this expression came from the cache
@@ -119,7 +129,7 @@ object Runtime {
     @named("expressionUpdate")
     case class ExpressionUpdate(
       expressionId: ExpressionId,
-      expressionTypes: Option[Vector[String]],
+      expressionType: Option[ExpressionType],
       methodCall: Option[MethodCall],
       profilingInfo: Vector[ProfilingInfo],
       fromCache: Boolean,

engine/runtime-instrument-common/src/main/java/org/enso/interpreter/instrument/RuntimeCache.java

@@ -17,7 +17,7 @@
 public final class RuntimeCache implements java.util.function.Function<String, Object> {
   private final Map<UUID, Reference<Object>> cache = new HashMap<>();
   private final Map<UUID, Reference<Object>> expressions = new HashMap<>();
-  private final Map<UUID, String[]> types = new HashMap<>();
+  private final Map<UUID, TypeInfo> types = new HashMap<>();
   private final Map<UUID, ExecutionService.FunctionCallInfo> calls = new HashMap<>();
   private CachePreferences preferences = CachePreferences.empty();
   private Consumer<UUID> observer;
@@ -107,15 +107,15 @@ public Set<UUID> clear(CachePreferences.Kind kind) {
    * @return the previously cached type.
    */
   @CompilerDirectives.TruffleBoundary
-  public String[] putType(UUID key, String[] typeNames) {
-    return types.put(key, typeNames);
+  public TypeInfo putType(UUID key, TypeInfo typeInfo) {
+    return types.put(key, typeInfo);
   }
 
   /**
    * @return the cached type of the expression
    */
   @CompilerDirectives.TruffleBoundary
-  public String[] getType(UUID key) {
+  public TypeInfo getType(UUID key) {
     return types.get(key);
   }
 

engine/runtime-instrument-common/src/main/java/org/enso/interpreter/instrument/TypeInfo.java

@@ -0,0 +1,28 @@
+package org.enso.interpreter.instrument;
+
+import java.util.Arrays;
+
+/**
+ * The type information observed by the instrumentation.
+ *
+ * <p>The list in the type definition represents an intersection type. A list with a single element
+ * represents a simple type.
+ *
+ * @param visibleType the public type of the value visible to the user
+ * @param hiddenType the list of types the value can be converted to
+ */
+public record TypeInfo(String[] visibleType, String[] hiddenType) {
+
+  public static TypeInfo ofType(String typeName) {
+    return new TypeInfo(new String[] {typeName}, new String[0]);
+  }
+
+  public static TypeInfo ofIntersectionType(String[] intersectionType) {
+    return new TypeInfo(intersectionType, new String[0]);
+  }
+
+  @Override
+  public String toString() {
+    return "TypeInfo(" + Arrays.toString(visibleType) + "," + Arrays.toString(hiddenType) + ")";
+  }
+}

engine/runtime-instrument-common/src/main/java/org/enso/interpreter/service/ExecutionCallbacks.java

@@ -1,6 +1,7 @@
 package org.enso.interpreter.service;
 
 import com.oracle.truffle.api.CompilerDirectives;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
@@ -9,6 +10,7 @@
 import org.enso.interpreter.instrument.MethodCallsCache;
 import org.enso.interpreter.instrument.OneshotExpression;
 import org.enso.interpreter.instrument.RuntimeCache;
+import org.enso.interpreter.instrument.TypeInfo;
 import org.enso.interpreter.instrument.UpdatesSynchronizationState;
 import org.enso.interpreter.instrument.VisualizationHolder;
 import org.enso.interpreter.instrument.profiling.ExecutionTime;
@@ -98,16 +100,16 @@ public Object findCachedResult(IdExecutionService.Info info) {
   @Override
   public void updateCachedResult(IdExecutionService.Info info) {
     Object result = info.getResult();
-    String[] resultTypes = typeOf(result);
+    TypeInfo resultType = typeOf(result);
     UUID nodeId = info.getId();
-    String[] cachedTypes = cache.getType(nodeId);
+    TypeInfo cachedType = cache.getType(nodeId);
     FunctionCallInfo call = functionCallInfoById(nodeId);
     FunctionCallInfo cachedCall = cache.getCall(nodeId);
     ProfilingInfo[] profilingInfo = new ProfilingInfo[] {new ExecutionTime(info.getElapsedTime())};
 
     ExpressionValue expressionValue =
         new ExpressionValue(
-            nodeId, result, resultTypes, cachedTypes, call, cachedCall, profilingInfo, false);
+            nodeId, result, resultType, cachedType, call, cachedCall, profilingInfo, false);
     syncState.setExpressionUnsync(nodeId);
     syncState.setVisualizationUnsync(nodeId);
 
@@ -119,7 +121,7 @@ public void updateCachedResult(IdExecutionService.Info info) {
       cache.offer(nodeId, result);
       cache.putCall(nodeId, call);
     }
-    cache.putType(nodeId, resultTypes);
+    cache.putType(nodeId, resultType);
 
     callOnComputedCallback(expressionValue);
     executeOneshotExpressions(nodeId, result, info);
@@ -214,19 +216,32 @@ private FunctionCallInfo functionCallInfoById(UUID nodeId) {
     return calls.get(nodeId);
   }
 
-  private String[] typeOf(Object value) {
+  private TypeInfo typeOf(Object value) {
     if (value instanceof UnresolvedSymbol) {
-      return new String[] {Constants.UNRESOLVED_SYMBOL};
+      return TypeInfo.ofType(Constants.UNRESOLVED_SYMBOL);
     }
 
-    var typeOfNode = TypeOfNode.getUncached();
-    Type[] allTypes = value == null ? null : typeOfNode.findAllTypesOrNull(value, true);
-    if (allTypes != null) {
-      String[] result = new String[allTypes.length];
-      for (var i = 0; i < allTypes.length; i++) {
-        result[i] = getTypeQualifiedName(allTypes[i]);
+    if (value != null) {
+      final TypeOfNode typeOfNode = TypeOfNode.getUncached();
+      final Type[] publicTypes = typeOfNode.findAllTypesOrNull(value, false);
+
+      if (publicTypes != null) {
+        final Type[] allTypes = typeOfNode.findAllTypesOrNull(value, true);
+        assert Arrays.equals(publicTypes, Arrays.copyOfRange(allTypes, 0, publicTypes.length));
+        final Type[] hiddenTypes =
+            Arrays.copyOfRange(allTypes, publicTypes.length, allTypes.length);
+
+        final String[] publicTypeNames = new String[publicTypes.length];
+        for (var i = 0; i < publicTypes.length; i++) {
+          publicTypeNames[i] = getTypeQualifiedName(publicTypes[i]);
+        }
+        final String[] hiddenTypeNames = new String[hiddenTypes.length];
+        for (var i = 0; i < hiddenTypeNames.length; i++) {
+          hiddenTypeNames[i] = getTypeQualifiedName(hiddenTypes[i]);
+        }
+
+        return new TypeInfo(publicTypeNames, hiddenTypeNames);
       }
-      return result;
     }
 
     return null;

engine/runtime-instrument-common/src/main/java/org/enso/interpreter/service/ExecutionService.java

@@ -32,6 +32,7 @@
 import org.enso.interpreter.instrument.ExpressionExecutionState;
 import org.enso.interpreter.instrument.MethodCallsCache;
 import org.enso.interpreter.instrument.RuntimeCache;
+import org.enso.interpreter.instrument.TypeInfo;
 import org.enso.interpreter.instrument.UpdatesSynchronizationState;
 import org.enso.interpreter.instrument.VisualizationHolder;
 import org.enso.interpreter.instrument.profiling.ProfilingInfo;
@@ -662,8 +663,8 @@ public FunctionCallInstrumentationNode.FunctionCall getCall() {
   public static final class ExpressionValue {
     private final UUID expressionId;
     private final Object value;
-    private final String[] types;
-    private final String[] cachedTypes;
+    private final TypeInfo typeInfo;
+    private final TypeInfo cachedTypeInfo;
     private final FunctionCallInfo callInfo;
     private final FunctionCallInfo cachedCallInfo;
     private final ProfilingInfo[] profilingInfo;
@@ -674,8 +675,8 @@ public static final class ExpressionValue {
      *
      * @param expressionId the id of the expression being computed.
      * @param value the value returned by computing the expression.
-     * @param types the type of the returned value.
-     * @param cachedTypes the cached type of the value.
+     * @param typeInfo the type info of the returned value.
+     * @param cachedTypeInfo the cached type info of the value.
      * @param callInfo the function call data.
      * @param cachedCallInfo the cached call data.
      * @param profilingInfo the profiling information associated with this node
@@ -684,16 +685,16 @@ public static final class ExpressionValue {
     public ExpressionValue(
         UUID expressionId,
         Object value,
-        String[] types,
-        String[] cachedTypes,
+        TypeInfo typeInfo,
+        TypeInfo cachedTypeInfo,
         FunctionCallInfo callInfo,
         FunctionCallInfo cachedCallInfo,
         ProfilingInfo[] profilingInfo,
         boolean wasCached) {
       this.expressionId = expressionId;
       this.value = value;
-      this.types = types;
-      this.cachedTypes = cachedTypes;
+      this.typeInfo = typeInfo;
+      this.cachedTypeInfo = cachedTypeInfo;
       this.callInfo = callInfo;
       this.cachedCallInfo = cachedCallInfo;
       this.profilingInfo = profilingInfo;
@@ -708,11 +709,11 @@ public String toString() {
           + expressionId
           + ", value="
           + (value == null ? "null" : new MaskedString(value.toString()).applyMasking())
-          + ", types='"
-          + Arrays.toString(types)
+          + ", typeInfo='"
+          + typeInfo
           + '\''
-          + ", cachedTypes='"
-          + Arrays.toString(cachedTypes)
+          + ", cachedTypeInfo='"
+          + cachedTypeInfo
           + '\''
           + ", callInfo="
           + callInfo
@@ -735,15 +736,15 @@ public UUID getExpressionId() {
     /**
      * @return the type of the returned value.
      */
-    public String[] getTypes() {
-      return types;
+    public TypeInfo getType() {
+      return typeInfo;
     }
 
     /**
      * @return the cached type of the value.
      */
-    public String[] getCachedTypes() {
-      return cachedTypes;
+    public TypeInfo getCachedType() {
+      return cachedTypeInfo;
     }
 
     /**
@@ -785,7 +786,22 @@ public boolean wasCached() {
      * @return {@code true} when the type differs from the cached value.
      */
     public boolean isTypeChanged() {
-      return !Arrays.equals(types, cachedTypes);
+      String[] visibleType = null;
+      String[] hiddenType = null;
+      if (typeInfo != null) {
+        visibleType = typeInfo.visibleType();
+        hiddenType = typeInfo.hiddenType();
+      }
+
+      String[] cachedVisibleType = null;
+      String[] cachedHiddenType = null;
+      if (cachedTypeInfo != null) {
+        cachedVisibleType = cachedTypeInfo.visibleType();
+        cachedHiddenType = cachedTypeInfo.hiddenType();
+      }
+
+      return !Arrays.equals(visibleType, cachedVisibleType)
+          || !Arrays.equals(hiddenType, cachedHiddenType);
     }
 
     /**