private void VisitFunction(Function function)
{
Debug.Assert(function.OutParams.Count == 1);
List <CommutativityHint> hints = new List <CommutativityHint>();
// First we collect all {:commutativity "first_action", "second_action"} attributes
for (QKeyValue kv = function.Attributes; kv != null; kv = kv.Next)
{
if (kv.Key != CivlAttributes.COMMUTATIVITY)
{
continue;
}
if (kv.Params.Count == 2 &&
kv.Params[0] is string firstActionName &&
kv.Params[1] is string secondActionName)
{
firstAction = ctc.FindAtomicActionOrAbstraction(firstActionName);
secondAction = ctc.FindAtomicActionOrAbstraction(secondActionName);
if (firstAction == null)
{
ctc.Error(kv, $"Could not find atomic action {firstActionName}");
}
if (secondAction == null)
{
ctc.Error(kv, $"Could not find atomic action {secondActionName}");
}
if (firstAction != null && secondAction != null)
{
CheckInParams(function.InParams);
}
hints.Add(new CommutativityHint(function, firstAction, secondAction, args));
}