public static {{ return_type }} {{ method_name }}({{ params }}) throws {{ exception_class }} {
try (var arena = Arena.ofShared();
var bridge = new VisitorBridge({{ visitor_arg }})) {
{{ marshal_body }}
var visitorHandle = (MemorySegment) NativeLib.{{ prefix_upper }}_VISITOR_CREATE.invoke(bridge.callbacksStruct());
if (visitorHandle.equals(MemorySegment.NULL)) {
throw new {{ exception_class }}("Failed to create visitor handle", null);
}
Throwable operationFailure = null;
try {
{{ invoke_body }}
} catch (Throwable e) {
operationFailure = new {{ exception_class }}("FFI call failed", e);
throw operationFailure;
} finally {
List<Throwable> cleanupFailures = new java.util.ArrayList<>();
try {
NativeLib.{{ prefix_upper }}_VISITOR_FREE.invoke(visitorHandle);
} catch (Throwable failure) {
cleanupFailures.add(failure);
}
try {
bridge.rethrowVisitorError();
} catch (Throwable failure) {
cleanupFailures.add(failure);
}
if (!cleanupFailures.isEmpty()) {
RuntimeException aggregate = new RuntimeException("Visitor cleanup failed");
cleanupFailures.forEach(aggregate::addSuppressed);
if (operationFailure != null) operationFailure.addSuppressed(aggregate);
else throw aggregate;
}
}
} catch ({{ exception_class }} e) {
throw e;
} catch (Throwable e) {
throw new {{ exception_class }}("FFI call failed", e);
}
}