Unknown port types handled with unknown instead of Present

core/src/main/java/org/lflang/Target.java

@@ -268,7 +268,6 @@ public enum Target {
           // underscores)
           "TimeUnit",
           "TimeValue",
-          "Present",
           "Sched",
           "Read",
           "Write",

core/src/main/java/org/lflang/generator/TargetTypes.java

@@ -60,7 +60,7 @@ default String getTargetBracedListExpr(BracedListExpression expr, InferredType t
         .collect(Collectors.joining(",", "{", "}"));
   }
 
-  /** Return an "undefined" type which is used as a default when a type cannot be inferred. */
+  /** Return an "unknown" type which is used as a default when a type cannot be inferred. */
   String getTargetUndefinedType();
 
   /**

core/src/main/java/org/lflang/generator/ts/TSTypes.java

@@ -40,7 +40,7 @@ public String getTargetTagType() {
 
   @Override
   public String getTargetUndefinedType() {
-    return "Present";
+    return "unknown";
   }
 
   public String getTargetTimeExpr(TimeValue value) {

core/src/main/kotlin/org/lflang/generator/ts/TSDelayBodyGenerator.kt

@@ -9,15 +9,15 @@ object TSDelayBodyGenerator : DelayBodyGenerator {
     /**
      * Return a TS type for the specified action.
      * If the type has not been specified, return
-     * "Present" which is the base type for Actions.
+     * `unknown`.
      * @param action The action
      * @return The TS type.
      */
     private fun getActionType(action: Action): String {
         return if (action.type != null) {
             TSTypes.getInstance().getTargetType(action.type)
         } else {
-            "Present"
+            "unknown"
         }
     }
 
@@ -30,7 +30,7 @@ object TSDelayBodyGenerator : DelayBodyGenerator {
     }
 
     override fun generateDelayGeneric(): String {
-        return "T extends Present"
+        return "T"
     }
 
     override fun generateAfterDelaysWithVariableWidth() = false

core/src/main/kotlin/org/lflang/generator/ts/TSExtensions.kt

@@ -35,20 +35,20 @@ fun WidthSpec.toTSCode(): String = terms.joinToString(" + ") {
 /**
  * Return a TS type for the specified port.
  * If the type has not been specified, return
- * "Present" which is the base type for ports.
+ * `unknown`.
  * @return The TS type.
  */
 val Port.tsPortType: String
-    get() = type?.let { TSTypes.getInstance().getTargetType(it) } ?: "Present"
+    get() = type?.let { TSTypes.getInstance().getTargetType(it) } ?: "unknown"
 
 /**
  * Return a TS type for the specified action.
  * If the type has not been specified, return
- * "Present" which is the base type for Actions.
+ * `unknown` which is the base type for Actions.
  * @return The TS type.
  */
 val Action.tsActionType: String
-    get() = type?.let { TSTypes.getInstance().getTargetType(it) } ?: "Present"
+    get() = type?.let { TSTypes.getInstance().getTargetType(it) } ?: "unknown"
 
 fun Expression.toTsTime(): String = TSTypes.getInstance().getTargetTimeExpr(this)
 fun TimeValue.toTsTime(): String = TSTypes.getInstance().getTargetTimeExpr(this)

core/src/main/kotlin/org/lflang/generator/ts/TSImportPreambleGenerator.kt

@@ -63,7 +63,7 @@ class TSImportPreambleGenerator(
             import {Reaction as __Reaction} from '@lf-lang/reactor-ts'
             import {State as __State} from '@lf-lang/reactor-ts'
             import {TimeUnit, TimeValue, Tag as __Tag, Origin as __Origin} from '@lf-lang/reactor-ts'
-            import {Args as __Args, Variable as __Variable, Triggers as __Triggers, Present, Read, Write, ReadWrite, MultiReadWrite, Sched} from '@lf-lang/reactor-ts'
+            import {Variable as __Variable, Read, Write, ReadWrite, MultiReadWrite, Sched} from '@lf-lang/reactor-ts'
             import {Log} from '@lf-lang/reactor-ts'
             import {ProcessedCommandLineArgs as __ProcessedCommandLineArgs, CommandLineOptionDefs as __CommandLineOptionDefs, CommandLineUsageDefs as __CommandLineUsageDefs, CommandLineOptionSpec as __CommandLineOptionSpec, unitBasedTimeValueCLAType as __unitBasedTimeValueCLAType, booleanCLAType as __booleanCLAType} from '@lf-lang/reactor-ts'
             """

core/src/main/kotlin/org/lflang/generator/ts/TSReactionGenerator.kt

@@ -105,8 +105,8 @@ class TSReactionGenerator(
             """
             |
             |this.add${if (reaction.isMutation) "Mutation" else "Reaction"}(
-            |    new __Triggers($reactionTriggers),
-            |    new __Args($reactFuncArgs),
+            |    [$reactionTriggers],
+            |    [$reactFuncArgs],
             |    function ($reactSignature) {
             |        // =============== START react prologue
         ${" |        "..reactPrologue}

core/src/main/kotlin/org/lflang/generator/ts/TSTimerGenerator.kt

@@ -1,8 +1,6 @@
 package org.lflang.generator.ts
 
-import org.lflang.generator.getTargetTimeExpr
 import org.lflang.generator.orZero
-import org.lflang.lf.Expression
 import org.lflang.lf.Timer
 import java.util.*