ST6RI-979 Added post-processing for feature-ref & instantiation exprs.

Moved result-adding code from conditional in
ExpressionParserPostProcessor to new post-processor classes.

Author: seidewitz

org.omg.kerml.xtext/src/org/omg/kerml/xtext/postprocessing/ExpressionParserPostProcessor.java

@@ -11,11 +11,7 @@
 
 package org.omg.kerml.xtext.postprocessing;
 
-import org.omg.sysml.lang.sysml.ConstructorExpression;
 import org.omg.sysml.lang.sysml.Expression;
-import org.omg.sysml.lang.sysml.FeatureReferenceExpression;
-import org.omg.sysml.lang.sysml.InvocationExpression;
-import org.omg.sysml.util.TypeUtil;
 
 public class ExpressionParserPostProcessor extends StepParserPostProcessor {
 
@@ -28,14 +24,4 @@ public Expression getTarget() {
 		return (Expression)super.getTarget();
 	}
 
-	@Override
-	public void postProcess() {
-		super.postProcess();
-		Expression target = getTarget();
-		if (target instanceof FeatureReferenceExpression || target instanceof ConstructorExpression
-				|| target instanceof InvocationExpression) {
-			TypeUtil.addResultParameterTo(target);
-		}
-	}
-
 }

org.omg.kerml.xtext/src/org/omg/kerml/xtext/postprocessing/FeatureReferenceExpressionParserPostProcessor.java

@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * SysML 2 Pilot Implementation
+ * Copyright (c) 2026 Model Driven Solutions, Inc.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+
+package org.omg.kerml.xtext.postprocessing;
+
+import org.omg.sysml.lang.sysml.FeatureReferenceExpression;
+import org.omg.sysml.util.TypeUtil;
+
+public class FeatureReferenceExpressionParserPostProcessor extends ExpressionParserPostProcessor {
+
+	public FeatureReferenceExpressionParserPostProcessor(FeatureReferenceExpression element) {
+		super(element);
+	}
+
+	@Override
+	public FeatureReferenceExpression getTarget() {
+		return (FeatureReferenceExpression)super.getTarget();
+	}
+
+	@Override
+	public void postProcess() {
+		super.postProcess();
+		TypeUtil.addResultParameterTo(getTarget());
+	}
+
+}

org.omg.kerml.xtext/src/org/omg/kerml/xtext/postprocessing/InstantiationExpressionParserPostProcessor.java

@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * SysML 2 Pilot Implementation
+ * Copyright (c) 2026 Model Driven Solutions, Inc.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+
+package org.omg.kerml.xtext.postprocessing;
+
+import org.omg.sysml.lang.sysml.InstantiationExpression;
+import org.omg.sysml.util.TypeUtil;
+
+public class InstantiationExpressionParserPostProcessor extends ExpressionParserPostProcessor {
+
+	public InstantiationExpressionParserPostProcessor(InstantiationExpression element) {
+		super(element);
+	}
+
+	@Override
+	public InstantiationExpression getTarget() {
+		return (InstantiationExpression)super.getTarget();
+	}
+
+	@Override
+	public void postProcess() {
+		super.postProcess();
+		TypeUtil.addResultParameterTo(getTarget());
+	}
+
+}

org.omg.kerml.xtext/src/org/omg/kerml/xtext/postprocessing/KerMLParserPostProcessorFactory.java

@@ -98,11 +98,21 @@ public ElementParserPostProcessor caseFeatureInverting(FeatureInverting element)
 			return new FeatureInvertingParserPostProcessor(element);
 		}
 
+		@Override
+		public ElementParserPostProcessor caseFeatureReferenceExpression(FeatureReferenceExpression element) {
+			return new FeatureReferenceExpressionParserPostProcessor(element);
+		}
+
 		@Override
 		public ElementParserPostProcessor caseFeatureTyping(FeatureTyping element) {
 			return new FeatureTypingParserPostProcessor(element);
 		}
 
+		@Override
+		public ElementParserPostProcessor caseInstantiationExpression(InstantiationExpression element) {
+			return new InstantiationExpressionParserPostProcessor(element);
+		}
+
 		@Override
 		public ElementParserPostProcessor caseImport(Import element) {
 			return new ImportParserPostProcessor(element);