IASTTranslationUnit ast = tu.getAST(index, 0);

outputText.add("Location: " + ast.getFileLocation().getFileName());
outputText.add("CppProject: " + tu.getCProject().getElementName());
outputText.add("");

// traverse the ast using the visitor pattern
AddPortInfoVisitor searcher = new AddPortInfoVisitor();
ast.accept(searcher);

for (IASTFunctionCallExpression funcCallEx : searcher.getFunctionCallList()) {
outputText.add("");

// now get the LiteralExpression as the port name
IASTLiteralExpression literalExpression = getLiteralExpression(funcCallEx);
outputText.add("Portname: " + String.valueOf(literalExpression.getValue()));

// second part is an UnaryExpression
IASTUnaryExpression unaryExpression = getUnaryExpression(funcCallEx);
IASTExpression operand = unaryExpression.getOperand();
if (operand instanceof IASTFieldReference) {
IASTFieldReference fref = (IASTFieldReference) operand;
outputText.add("Owner: '" + fref.getFieldOwner().toString() + "'  ->  Field: '"
+ fref.getFieldName().toString() + "'");
outputText.add("Type: " + fref.getExpressionType());